Filed Pursuant to Rule 424(b)(3)
Registration No. 333-278976

MERGER PROPOSAL—YOUR VOTE IS VERY IMPORTANT

To the ChampionX Corporation stockholders:

As previously announced, ChampionX Corporation (“ChampionX”), a Delaware corporation, Schlumberger Limited, a Curaçao corporation (“SLB”), Sodium Holdco, Inc., a Delaware corporation and indirect wholly owned subsidiary of SLB (“Holdco”), and Sodium Merger Sub, Inc., a Delaware corporation and indirect wholly owned subsidiary of SLB and direct wholly owned subsidiary of Holdco (“Merger Sub”), have entered into an Agreement and Plan of Merger, dated as of April 2, 2024 (the “Merger Agreement”), pursuant to which SLB will acquire ChampionX in an all-stock transaction by means of a merger of Merger Sub with and into ChampionX (the “Merger,” together with the other transactions contemplated by the Merger Agreement, the “Transactions”), with ChampionX surviving the Merger as an indirect wholly owned subsidiary of SLB.

Pursuant to the Merger Agreement, at the effective time of the Merger (the “Effective Time”) and by virtue of the Merger, each share of common stock, par value $0.01 per share, of ChampionX (“ChampionX common stock”) issued and outstanding immediately prior to the Effective Time (other than shares of ChampionX common stock held in treasury of ChampionX or held by SLB, Holdco or any direct or indirect wholly owned subsidiary of SLB, in each case except for any shares held on behalf of third parties (“ChampionX Excluded Stock”)) will be converted, without any action on the part of the holder thereof, into the right to receive 0.735 shares of common stock (the “Exchange Ratio”), par value $0.01 per share, of SLB (“SLB common stock”), which shares will be duly authorized and validly issued in accordance with applicable laws (the “Equity Consideration”), and, if applicable, cash in lieu of fractional shares.

The Exchange Ratio is fixed and will not be adjusted to reflect price changes prior to the closing of the Merger. SLB common stock is listed on the New York Stock Exchange (“NYSE”) under the trading symbol “SLB,” and ChampionX common stock is listed on The Nasdaq Stock Market (“Nasdaq”) under the trading symbol “CHX.” Based on the closing price of SLB common stock on the NYSE on April 1, 2024, the last trading day before the public announcement of the Merger Agreement, the Exchange Ratio represented approximately $40.59 in value for each share of ChampionX common stock. This amount represented a premium of approximately 14.7% to the closing price of ChampionX common stock on Nasdaq on April 1, 2024. Based on the closing price of SLB common stock on the NYSE of $48.62 on May 14, 2024, the latest practicable trading day before the date of this proxy statement/prospectus, the Exchange Ratio represented approximately $35.74 per share in value for each share of ChampionX common stock.

The value of the consideration paid to ChampionX stockholders will fluctuate with changes in the market price of SLB common stock. We encourage you to obtain current market quotations of SLB common stock, given that the Equity Consideration is payable in SLB common stock, and ChampionX common stock.

Based on the number of outstanding shares of ChampionX common stock (including each share of ChampionX common stock underlying each deferred stock unit award of ChampionX) on the record date of May 14, 2024 for the ChampionX Special Meeting (defined below), we anticipate that SLB will issue approximately 140,076,251 shares of SLB common stock in connection with the Merger.

Upon completion of the Merger, based on the number of outstanding shares of ChampionX common stock and SLB common stock as of the date of the Merger Agreement, we estimate that former ChampionX stockholders will own approximately 9% of the outstanding shares of SLB common stock and current SLB shareholders will own approximately 91% of the outstanding shares of SLB common stock.

In connection with the Merger, ChampionX will hold a virtual special meeting of ChampionX stockholders (the “ChampionX Special Meeting”) to consider and vote on (1) a proposal to adopt the Merger Agreement (the “Merger Proposal”); (2) a proposal to approve, by non-binding, advisory vote, the compensation that may become payable to ChampionX’s named executive officers in connection with the Merger (the “Compensation Proposal”); and (3) a proposal to approve the adjournment of the ChampionX Special Meeting, if necessary, (a) to solicit additional proxies in favor of the Merger Proposal if (i) there are holders of an insufficient number of shares of ChampionX common stock present online or represented by proxy and entitled to vote at the ChampionX Special Meeting to constitute a quorum at such meeting or (ii) there are insufficient votes at the time of such adjournment to approve the Merger Proposal or (b) to allow reasonable additional time for the filing and mailing of any required supplement or amendment to the accompanying proxy statement/prospectus, and the review of such materials by ChampionX stockholders (the “Adjournment Proposal”).

Your vote is important. The record date for determining the ChampionX stockholders entitled to receive notice of, and to vote at, the ChampionX Special Meeting is the close of business on May 14, 2024. The Merger cannot be consummated unless the Merger Agreement is approved by the affirmative vote of the holders of a majority of the outstanding shares of ChampionX common stock entitled to vote at the ChampionX Special Meeting. ABSTENTIONS, A BROKER NON-VOTE OR A FAILURE TO VOTE WILL HAVE THE SAME EFFECT AS A VOTE “AGAINST” THE MERGER PROPOSAL.

The board of directors of ChampionX (the “ChampionX Board”) has unanimously (i) determined the Merger Agreement and the consummation of the Merger and the Transactions to be fair to and in the best interests of ChampionX and its stockholders, (ii) declared the Merger Agreement and the consummation of the Transactions, including the Merger, to be advisable, (iii) authorized and approved the Merger Agreement, including the execution, delivery and performance thereof, (iv) directed that the Merger Agreement be submitted to the ChampionX stockholders for their consideration and adoption and (v) recommended the ChampionX stockholders adopt the Merger Agreement. ACCORDINGLY, THE CHAMPIONX BOARD UNANIMOUSLY RECOMMENDS A VOTE “FOR” THE MERGER PROPOSAL, A VOTE “FOR” THE COMPENSATION PROPOSAL AND A VOTE “FOR” THE ADJOURNMENT PROPOSAL.

We urge you to read this proxy statement/prospectus carefully. The obligations of SLB and ChampionX to consummate the Merger are subject to the satisfaction or waiver of certain conditions set forth in the Merger Agreement. More information about SLB, ChampionX, the ChampionX Special Meeting, the Merger Agreement and the Transactions, including the Merger, is included in this proxy statement/prospectus. You should also consider carefully the risks that are described in the “Risk Factors” section of this proxy statement/prospectus, beginning on page 24. If you have any questions regarding this proxy statement/prospectus, you may contact D.F. King & Co., Inc., ChampionX’s proxy solicitor, by calling toll-free at (866) 416-0577.

Thank you for your continued support of and interest in ChampionX. We at ChampionX look forward to the successful combination of ChampionX and SLB.

Very truly yours,

Daniel W. Rabun

Chairman

ChampionX Corporation

Neither the U.S. Securities and Exchange Commission nor any state securities commission has approved or disapproved of the securities to be issued under this proxy statement/prospectus or determined if this proxy statement/prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

This proxy statement/prospectus is dated May 15, 2024 and is first being mailed to ChampionX stockholders on or about May 15, 2024.

NOTICE OF SPECIAL MEETING OF STOCKHOLDERS

OF

CHAMPIONX CORPORATION

TO BE HELD ON JUNE 18, 2024

To the ChampionX Corporation stockholders:

On behalf of the Board of Directors (the “ChampionX Board”) of ChampionX Corporation (“ChampionX”), we cordially invite you to attend a special meeting of ChampionX stockholders at https://meetnow.global/M6YL2F7, starting at 9:00 a.m. Central Time on June 18, 2024 (unless it is adjourned or postponed to a later date) (the “ChampionX Special Meeting”). The ChampionX Special Meeting will be virtual, conducted exclusively via live webcast accessible at https://meetnow.global/M6YL2F7. We believe that a virtual meeting provides easier and greater access to the meeting, which enables participation by the broadest number of stockholders. To be admitted to the ChampionX Special Meeting, ChampionX stockholders must enter the 15-digit control number found on their proxy card. ChampionX stockholders whose stock is held in a stock brokerage account or by a bank or other nominee must register in advance to attend the ChampionX Special Meeting. To register, each such ChampionX stockholder must request proof of their proxy power reflecting their ChampionX holdings from their broker or other nominee and submit it along with their name and email address to Computershare, ChampionX’s transfer agent. Requests for registration must be labeled “Legal Proxy” and be received no later than June 13, 2024 by 5:00 p.m. Eastern Time. Such ChampionX stockholders will receive confirmation of their registration by email after Computershare receives their registration materials. Registration materials and information should be sent: by email to legalproxy@computershare.com; or by mail to Computershare, ChampionX Legal Proxy, P.O. Box 43001, Providence, RI 02940-300.

The ChampionX Board has fixed the close of business on May 14, 2024 as the record date for determination of ChampionX stockholders entitled to attend and vote on the matters presented at the ChampionX Special Meeting.

At the ChampionX Special Meeting, ChampionX stockholders will be asked to consider and act on the following proposals:

These proposals are fully described in the accompanying proxy statement/prospectus, which also describes other matters contemplated in connection with the Merger. Before voting, please carefully read the proxy statement/prospectus in its

entirety, including the Merger Agreement and all other annexes, and including documents incorporated by reference, for further information relevant to the business to be transacted at the ChampionX Special Meeting. In particular, please see (i) the section of the proxy statement/prospectus entitled “The Merger Agreement,” which is incorporated into this notice by reference, for a description of the Merger Agreement and Transactions, including the Merger, (ii) the section of the proxy statement/prospectus entitled “Risk Factors,” for an explanation of the risks associated with the Merger Agreement and the Transactions, including the Merger, (iii) the copy of the Merger Agreement which is included as Annex A to the proxy statement/prospectus, which is incorporated into this notice by reference and (iv) the form of Certificate of Incorporation of Surviving Corporation included as Exhibit A to the Merger Agreement included as Annex A to the proxy statement/prospectus, which is incorporated into this notice by reference.

The ChampionX Board has unanimously (i) determined the Merger Agreement and the consummation of the Merger and the Transactions to be fair to and in the best interests of ChampionX and its stockholders, (ii) declared the Merger Agreement and the consummation of the Transactions, including the Merger, to be advisable, (iii) authorized and approved the Merger Agreement, including the execution, delivery and performance thereof, (iv) directed that the Merger Agreement be submitted to the ChampionX stockholders for their consideration and adoption and (v) recommended the ChampionX stockholders adopt the Merger Agreement. ACCORDINGLY, THE CHAMPIONX BOARD UNANIMOUSLY RECOMMENDS A VOTE “FOR” THE MERGER PROPOSAL, A VOTE “FOR” THE COMPENSATION PROPOSAL AND A VOTE “FOR” THE ADJOURNMENT PROPOSAL.

The Merger cannot be consummated unless the Merger Agreement is adopted by the affirmative vote of the holders of a majority of the outstanding shares of ChampionX common stock entitled to vote at the ChampionX Special Meeting. ABSTENTIONS, A BROKER NON-VOTE OR A FAILURE TO VOTE WILL HAVE THE SAME EFFECT AS A VOTE “AGAINST” THE MERGER PROPOSAL.

YOUR VOTE IS IMPORTANT. APPROVAL OF THE MERGER PROPOSAL BY THE CHAMPIONX STOCKHOLDERS IS A CONDITION TO THE CONSUMMATION OF THE MERGER AND REQUIRES THE AFFIRMATIVE VOTE OF A MAJORITY OF THE OUTSTANDING SHARES OF CHAMPIONX COMMON STOCK ENTITLED TO VOTE AT THE CHAMPIONX SPECIAL MEETING. WHETHER OR NOT YOU PLAN TO PARTICIPATE IN THE CHAMPIONX SPECIAL MEETING, PLEASE FOLLOW THE INSTRUCTIONS ON YOUR PROXY CARD TO VOTE BY MAIL, TELEPHONE OR INTERNET AS PROMPTLY AS POSSIBLE. IF YOUR SHARES ARE HELD IN THE NAME OF A BROKER OR CUSTODIAN, PLEASE FOLLOW THE VOTING INSTRUCTIONS PROVIDED BY SUCH BROKER OR CUSTODIAN.

The enclosed proxy statement/prospectus provides a detailed description of the Merger, the Merger Agreement and the other matters to be considered at the ChampionX Special Meeting. We urge you to read the proxy statement/prospectus carefully. The obligations of SLB and ChampionX to consummate the Merger are subject to the satisfaction or waiver of certain conditions set forth in the Merger Agreement. More information about SLB, ChampionX, the ChampionX Special Meeting, the Merger Agreement and the Transactions, including the Merger, is included in the proxy statement/prospectus. You should also consider carefully the risks that are described in the “Risk Factors” section of the proxy statement/prospectus.

If you have any questions concerning the Merger Agreement or the Transactions, including the Merger, or the accompanying proxy statement/prospectus or would like additional copies of the proxy statement/prospectus or the documents incorporated by reference into the proxy statement/prospectus, you may contact D.F. King & Co., Inc., ChampionX’s proxy solicitor, at the address, telephone numbers and email listed below. You will not be charged for any of these documents that you request.

D.F. KING & CO., INC.

48 Wall Street – 22nd Floor

New York, NY 10005

Banks and Brokers Call Collect: (212) 269-5550

Stockholders Please Call Toll-Free: (866) 416-0577

By email: championx@dfking.com

On behalf of the ChampionX Board and our management team, I extend our appreciation for your support.

JULIA WRIGHT

Senior Vice President, General Counsel & Secretary

ChampionX Corporation

REFERENCES TO ADDITIONAL INFORMATION

This proxy statement/prospectus incorporates important business and financial information about SLB and ChampionX from other documents that are not included in or delivered with this proxy statement/prospectus. This information is available to you without charge. You can obtain copies of the documents incorporated by reference into this proxy statement/prospectus through the Securities and Exchange Commission (sometimes referred to as the SEC) website at www.sec.gov or by requesting them in writing or by telephone from the appropriate company at the following addresses and telephone numbers:

In addition, you may also obtain additional copies of this proxy statement/prospectus or the documents incorporated by reference into this proxy statement/prospectus by contacting D.F. King & Co., Inc. (“D.F. King”), ChampionX’s proxy solicitor, at the address and telephone numbers listed below. You will not be charged for any of these documents that you request.

D.F. King & Co., Inc.

48 Wall Street – 22nd Floor

New York, NY 10005

Banks and Brokers Call Collect: (212) 269-5550

All Others Please Call Toll-Free: (866) 416-0577

By email: championx@dfking.com

In order to receive timely delivery of the documents in advance of the ChampionX Special Meeting, your request should be received no later than June 7, 2024. If you request any documents, ChampionX will mail them to you by first class mail, or another equally prompt means, within one business day after receipt of your request.

See the section entitled “Where You Can Find More Information” of this proxy statement/prospectus.

SUBMITTING PROXIES BY MAIL, TELEPHONE OR INTERNET

ChampionX stockholders of record may submit their proxies:

ChampionX stockholders whose shares are held in “street name” must provide their broker, nominee, fiduciary or other custodian with instructions on how to vote their shares; otherwise, their broker, nominee, fiduciary or other custodian will not vote their shares on any of the proposals before the ChampionX Special Meeting. ChampionX stockholders should check the voting form provided by their broker, nominee, fiduciary or other custodian for instructions on how to vote their shares.

ABOUT THIS PROXY STATEMENT/PROSPECTUS

This document, which forms part of a registration statement on Form S-4 filed with the Securities and Exchange Commission (the “SEC”) by SLB, constitutes a prospectus of SLB under Section 5 of the Securities Act of 1933, as amended (the “Securities Act”) with respect to the shares of common stock of SLB, par value $0.01 per share (“SLB common stock”), to be issued to the holders (the “ChampionX stockholders”) of shares of common stock, par value $0.01 per share, of ChampionX (“ChampionX common stock”) pursuant to the Agreement and Plan of Merger, dated as of April 2, 2024 (as amended from time to time, the “Merger Agreement”), by and among SLB, Sodium Holdco, Inc. (“Holdco”), Sodium Merger Sub, Inc. (“Merger Sub”), and ChampionX.

This document also constitutes a notice of meeting and proxy statement of ChampionX under Section 14(a) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”).

This proxy statement/prospectus does not constitute an offer to sell, or a solicitation of an offer to buy, any securities, or the solicitation of a proxy, in any jurisdiction to or from any person to whom it is unlawful to make any such offer or solicitation in such jurisdiction. SLB has supplied all information contained or incorporated by reference herein relating to SLB, and ChampionX has supplied all information contained herein or attached hereto relating to ChampionX. SLB and ChampionX have both contributed to the information relating to the Merger and the Merger Agreement contained in this proxy statement/prospectus.

You should rely only on the information contained in, attached to or incorporated by reference herein in connection with any vote, the giving or withholding of any proxy or any investment decision in connection with the Merger Agreement. SLB and ChampionX have not authorized anyone to provide you with information that is different from that contained in, attached to or incorporated by reference herein. This proxy statement/prospectus is dated May 15, 2024, and you should not assume that the information contained in this proxy statement/prospectus is accurate as of any date other than such date unless otherwise specifically provided herein. Further, you should not assume that the information incorporated by reference herein or attached hereto is accurate as of any date other than the date of the incorporated or attached document. Neither the mailing of this proxy statement/prospectus to ChampionX stockholders, nor the issuance by SLB of shares of SLB common stock pursuant to the Merger Agreement, will create any implication to the contrary.

All currency amounts referenced in this proxy statement/prospectus are in U.S. dollars.

All references in this proxy statement/prospectus to:

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QUESTIONS AND ANSWERS ABOUT THE MERGER AND THE CHAMPIONX SPECIAL MEETING

The following are some questions that you, as a stockholder of ChampionX, may have regarding the Merger, the Merger Agreement and the ChampionX Special Meeting, and brief answers to those questions. You are urged to read carefully this proxy statement/prospectus and the other documents referred to in this proxy statement/prospectus in their entirety because this section may not provide all of the information that is important to you with respect to the Merger, the Merger Agreement and the ChampionX Special Meeting. Additional important information is contained in the annexes to, and the documents incorporated by reference into, this proxy statement/prospectus. You may obtain the information incorporated by reference into this proxy statement/prospectus without charge by following the instructions under the section entitled “Where You Can Find More Information” of this proxy statement/prospectus.

In order to complete the Merger, among other things, ChampionX stockholders must vote to adopt the Merger Agreement. This proxy statement/prospectus serves as the proxy statement through which ChampionX will solicit proxies to obtain the adoption of the Merger Agreement by holders of a majority of the outstanding shares of ChampionX common stock entitled to vote at the ChampionX Special Meeting (“ChampionX Stockholder Approval”). It also serves as the prospectus for the delivery of SLB common stock as Equity Consideration.

ChampionX is holding the ChampionX Special Meeting to ask its stockholders to vote on the Merger Proposal. At the ChampionX Special Meeting, ChampionX stockholders will also be asked to vote on a proposal, by non-binding, advisory vote, concerning compensation that may become payable to ChampionX’s named executive officers in connection with the Merger and a proposal to adjourn the ChampionX Special Meeting, if necessary, under certain circumstances.

This document contains important information about the Merger, the Merger Agreement and the ChampionX Special Meeting, and you should read it carefully. The enclosed voting materials allow you to vote your shares without attending the ChampionX Special Meeting.

The Merger cannot be completed unless the holders of a majority of the outstanding shares of ChampionX common stock entitled to vote at the ChampionX Special Meeting vote to approve the Merger Proposal. If you fail to submit a proxy or vote in person at the ChampionX Special Meeting, or vote to abstain, or you do not provide your bank, broker, trust company or other nominee with instructions, as applicable, this will have the same effect as a vote “AGAINST” the Merger Proposal.

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In connection with the Merger, each share of ChampionX common stock issued and outstanding immediately prior to the Effective Time (other than ChampionX Excluded Stock) will be converted, without any action on the part of the holder thereof, into the right to receive 0.735 shares of SLB common stock, and, if applicable, cash in lieu of fractional shares.

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Prior to the Effective Time, SLB will issue shares of SLB common stock to Holdco, which will deliver those shares as the Equity Consideration to be paid to the ChampionX stockholders.

At the Effective Time, each ChampionX Option that is outstanding immediately prior to the Effective Time will automatically be converted into an option to acquire shares of SLB common stock with respect to that number of shares of SLB common stock that is equal to (i) the product of (A) the number of shares of ChampionX common stock underlying such ChampionX Option as of immediately prior to the Effective Time, multiplied by (B) the Exchange Ratio, (ii) rounded down to the nearest whole number (after such conversion, an “SLB Option”), at an exercise price per share equal to the quotient obtained by (x) dividing (i) the per share exercise price of the ChampionX Option by (ii) the Exchange Ratio, (y) rounded up to the nearest whole cent, provided, however, that the exercise price and the number of shares of SLB common stock covered by such SLB Option will be determined in a manner that is intended to be consistent with the requirements of Section 409A of the Code. Each SLB Option will otherwise continue to have, and will be subject to, the same terms and conditions as applied to the ChampionX Option immediately prior to the Effective Time.

At the Effective Time, each ChampionX RSU Award that is outstanding immediately prior to the Effective Time will be assumed and converted into a restricted stock unit award to acquire shares of SLB common stock (each, an “SLB RSU Award”), which will have, and be subject to, the same terms and conditions as applied to the ChampionX RSU Award immediately prior to the Effective Time, except that, (x) the number of shares of SLB common stock subject to the SLB RSU Award will equal (i) the product of (A) the number of shares of ChampionX common stock underlying such ChampionX RSU Award multiplied by (B) the Exchange Ratio, (ii) rounded down to the nearest whole share, (y) each SLB RSU Award will vest in full if, following the Effective Time, the holder thereof incurs a qualifying termination of employment by SLB or its subsidiaries at any time that such SLB RSU Award remains outstanding (and, solely in the case of a qualifying termination that occurs more than 18 months following the closing date, subject to the holder timely executing (and not revoking) a general release of claims in a form provided by SLB or one of its subsidiaries), and (z) SLB RSU Awards will not be entitled to receive any dividend equivalent rights with respect to any dividends declared or accrued following the Effective Time. At the Effective Time, each ChampionX DER (whether vested or unvested) will be cancelled and converted into the right to receive within 10 business days following the closing date, an amount in cash equal to the ChampionX Pre-Closing Dividend Amount.

At the Effective Time, each ChampionX Performance Share Award that is outstanding immediately prior to the Effective Time will be assumed and converted into an SLB RSU Award, which will have, and be subject to, the same terms and conditions as applied to the ChampionX Performance Share Award immediately prior to the Effective Time, except that, (x) the number of shares of SLB common stock subject to the SLB RSU Award will equal (i) the product of (A) a number of shares of ChampionX common stock underlying such ChampionX Performance Share Award determined based on such award’s Applicable Performance Level by (B) the Exchange Ratio, (ii) rounded down to the nearest whole share, (y) each such SLB RSU Award will vest in full if, following the Effective Time, the holder thereof incurs a qualifying termination (and, solely in the case of a qualifying termination that occurs more than 18 months following the closing

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date, subject to the holder timely executing (and not revoking) a general release of claims in a form provided by SLB or one of its subsidiaries), and (z) SLB RSU Awards will not be subject to any performance-based vesting conditions, which will be deemed achieved at the Applicable Performance Level.

At the Effective Time, each ChampionX DSU Award (whether vested or unvested) that is outstanding immediately prior to the Effective Time will be cancelled and converted into the right to receive, within 10 business days following the closing date, a number of shares of SLB common stock equal to (i) the product of (A) the number of shares of ChampionX common stock underlying the ChampionX DSU Award multiplied by (B) the Exchange Ratio, (ii) rounded down to the nearest whole share.

At the Effective Time, SLB will assume all of ChampionX’s obligations under the ChampionX

Amended and Restated 2018 Equity and Cash Incentive Plan (the “ChampionX Equity Plan”), each outstanding ChampionX Equity Award and the agreements evidencing the grants thereof, and the number and kind of shares available for issuance under the ChampionX Equity Plan will be adjusted to reflect shares of SLB common stock in accordance with the provisions of the ChampionX Equity Plan.

For additional information regarding the treatment of ChampionX’s equity awards, please see the section of this proxy statement/prospectus entitled “The Merger Agreement—Treatment of Equity Awards.”

Based on the closing price of SLB common stock on the NYSE on April 1, 2024, the last trading day before the public announcement of the Merger Agreement, the Equity Consideration represented approximately $40.59 per share of ChampionX common stock. Based on the closing price of SLB common stock on the NYSE on May 14, 2024, the most recent practicable trading day prior to the date of this proxy statement/prospectus, the Equity Consideration represented approximately $35.74 in value per share of ChampionX common stock. You should obtain current market quotations of ChampionX common stock and SLB common stock.

Except in certain specific circumstances (including as a result of the potential application of Section 304 of the Code) described in the section entitled “The Merger—Material U.S. Federal Income Tax Consequences,” a Non-U.S. Holder (as defined in the section entitled “The Merger—Material U.S. Federal

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Income Tax Consequences”) generally will not be subject to U.S. federal income tax on any gain recognized on the exchange of ChampionX common stock for SLB common stock in the Merger.

Please refer to the section entitled “The Merger—Material U.S. Federal Income Tax Consequences” of this proxy statement/prospectus for a description of the material U.S. federal income tax consequences of the Merger. Determining the actual tax consequences of the Merger to you may be complex and will depend on your specific situation. You should consult your tax advisor for a full understanding of the tax consequences of the Merger to you.

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The ChampionX Special Meeting can be accessed by visiting https://meetnow.global/M6YL2F7, where ChampionX stockholders will be able to participate and vote online during the ChampionX Special Meeting. ChampionX encourages its stockholders to access the meeting early—approximately 15 minutes before the start of the meeting. Please follow the instructions as outlined in this proxy statement/prospectus.

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ChampionX stockholders whose shares are held in “street name” must provide their broker, nominee, fiduciary or other custodian with instructions on how to vote their shares; otherwise, their broker, nominee, fiduciary or other custodian will not vote their shares on any of the proposals before the ChampionX Special Meeting. ChampionX stockholders should check the voting form provided by their broker, nominee, fiduciary or other custodian for instructions on how to vote their shares.

If you fail to vote, fail to instruct your bank, broker, trust company or other nominee to vote, or vote to abstain, it will have the same effect as a vote cast “AGAINST” the Merger Proposal.

If you fail to vote, or fail to instruct your bank, broker, trust company or other nominee to vote, it will have no effect on the Compensation Proposal or Adjournment Proposal. A vote to abstain will have the same effect as a vote cast “AGAINST” the Compensation Proposal or Adjournment Proposal.

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If you fail to vote, or fail to instruct your bank, broker, trust company or other nominee to vote, it will have no effect on the Compensation Proposal or Adjournment Proposal. A vote to abstain will have the same effect as a vote cast “AGAINST” the Compensation Proposal or Adjournment Proposal.

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ChampionX stockholders whose shares are held in “street name” must provide their broker, nominee, fiduciary or other custodian with instructions on how to vote their shares; otherwise, their broker, nominee, fiduciary or other custodian will not vote their shares on any of the proposals before the ChampionX Special Meeting. ChampionX stockholders should check the voting form provided by their broker, nominee, fiduciary or other custodian for instructions on how to vote their shares.

D.F. KING & CO., INC.

48 Wall Street – 22nd Floor

New York, NY 10005

Banks and Brokers Call Collect: (212) 269-5550

All Others Please Call Toll-Free: (866) 416-0577

By email: championx@dfking.com

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RISK FACTORS

By voting in favor of the Merger Proposal, ChampionX stockholders will be choosing to invest in SLB common stock. An investment in SLB common stock involves certain risks. Before deciding how to vote, ChampionX stockholders should carefully consider the risks described below, those described in the section entitled “Cautionary Statement Regarding Forward-Looking Statements” and the other information contained in this proxy statement/prospectus or in the documents of ChampionX and SLB incorporated by reference into this proxy statement/prospectus, particularly the risk factors set forth in the documents of ChampionX and SLB incorporated by reference into this proxy statement/prospectus. See the section entitled “Where You Can Find More Information.” In addition to the risks set forth below, new risks may emerge from time to time and it is not possible to predict all risk factors, nor can ChampionX or SLB assess the impact of all factors on the Merger and the Combined Company following the Merger or the extent to which any factor or combination of factors may cause actual results to differ materially from those contained in or implied by any forward-looking statements.

Risks Relating to the Merger

Because the Exchange Ratio is fixed and will not be adjusted in the event of any change in either ChampionX’s or SLB’s stock price, the number of shares of SLB common stock to be received by ChampionX stockholders in connection with the Merger will not change between now and the time the Merger is completed to reflect changes in the trading prices of SLB common stock or ChampionX common stock.

Pursuant to the Merger Agreement, at the Effective Time, each share of ChampionX common stock issued and outstanding immediately prior to the Effective Time (other than ChampionX Excluded Shares) will be converted, without any action on the part of the holder thereof, into the right to receive 0.735 shares of SLB common stock. The Exchange Ratio is fixed in the Merger Agreement and will not be adjusted for changes in the market price of either ChampionX common stock or SLB common stock, which means that the value of the Equity Consideration will depend in part on the price per share of SLB common stock at the time the Merger is completed. Changes in the price of SLB common stock prior to the Merger will affect the market value of the Equity Consideration that ChampionX stockholders will become entitled to receive on the date of the Merger. Neither party is permitted to abandon the Merger or terminate the Merger Agreement solely because of changes in the market price of either party’s common stock. Stock price changes may result from a variety of factors (many of which are beyond ChampionX’s or SLB’s control), including:

The price of SLB common stock at the completion of the Merger may vary from its price on the date the Merger Agreement was executed, on the date of this proxy statement/prospectus and on the date of the ChampionX Special Meeting. As a result, the market value represented by the Exchange Ratio will also vary. For example, based on the range of closing prices of SLB common stock during the period from April 1, 2024 (the last trading day before the public announcement of the Merger), through May 14, 2024 (the most recent practicable trading day before the date of this proxy statement/prospectus), the Exchange Ratio represented a market value ranging from a low of $35.12 to a high of $40.90 for each share of ChampionX common stock.

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Because the date that the Merger is completed will be later than the date of the ChampionX Special Meeting, at the time of the ChampionX Special Meeting, ChampionX stockholders will not know the exact market value of the SLB common stock that they will receive upon completion of the Merger.

If the price of SLB common stock declines between the date of the ChampionX Special Meeting and the Effective Time, including for any of the reasons described above, ChampionX stockholders will receive shares of SLB common stock that have a market value upon completion of the Merger that is less than the market value calculated pursuant to the Exchange Ratio on the date of the ChampionX Special Meeting. Therefore, while the number of shares of SLB common stock to be issued and delivered in the Merger is fixed, ChampionX stockholders cannot be sure of the market value of the SLB common stock they will receive upon completion of the Merger. In addition, the market value of the shares of SLB common stock that ChampionX stockholders will be entitled to receive in the Merger also may fluctuate after the completion of the Merger and ChampionX stockholders could lose some or all of the value of the SLB common stock they receive.

The market price for SLB common stock may be affected by factors different from those that historically have affected the market price of ChampionX common stock.

Upon the completion of the Merger, ChampionX stockholders will become SLB shareholders. SLB’s business differs from, and is complementary to, that of ChampionX, and, accordingly, the financial position or results of operations of SLB following the Merger will be affected by certain factors that are different from those currently affecting the financial position or results of operations of ChampionX. As such, the future market price and performance of SLB common stock is likely to be different from that of the historical market price and performance and ChampionX common stock. For a discussion of the businesses of SLB and ChampionX and of some important factors to consider in connection with those businesses, see the section entitled “Where You Can Find More Information” for the location of information incorporated by reference into this proxy statement/prospectus.

ChampionX stockholders will have a significantly reduced ownership and voting interest in the Combined Company after the Merger and will exercise less influence over the Combined Company’s management.

Upon the completion of the Merger, it is expected that ChampionX stockholders, who collectively own 100% of ChampionX, will own approximately 9% of SLB common stock, based on the number of shares of ChampionX common stock and SLB common stock outstanding as of the record date. Consequently, ChampionX stockholders will have less influence over the management and policies of SLB than they currently have over the management and policies of ChampionX.

ChampionX’s directors and executive officers have interests in the Merger that may be different from, and in addition to, the interests of other ChampionX stockholders.

You should be aware that ChampionX’s directors and executive officers are parties to agreements or participants in other arrangements that give them interests in the Merger that may be different from, or in addition to, the interests of the other ChampionX stockholders, which could create conflicts of interest in their determinations to recommend the Merger. The ChampionX Board was aware of these interests and considered them, among other matters, in approving the Merger Agreement and the Transactions and making its recommendation that ChampionX stockholders vote in favor of the Merger Proposal. ChampionX stockholders should consider these interests in voting on the Merger. See the sections entitled “The Merger—Interests of ChampionX’s Directors and Executive Officers in the Merger” and “Advisory Vote on Merger-Related Compensation for ChampionX’s Named Executive Officers” for additional details regarding these interests.

SLB and ChampionX will be subject to business uncertainties and certain operating restrictions until the completion of the Merger.

Under the terms of the Merger Agreement, ChampionX and SLB have each agreed to refrain from taking certain actions with respect to their business and financial affairs during the pendency of the Merger, which restrictions

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could be in place for an extended period of time if completion of the Merger is delayed and could adversely impact ChampionX’s and SLB’s ability to execute certain of their business strategies and their financial condition, results of operations or cash flows. During the pendency of the Merger, some of the suppliers and customers of ChampionX and/or SLB may delay or defer sales and purchasing decisions, which could negatively impact revenues, earnings and cash flows regardless of whether the Merger is completed. See the section entitled “The Merger Agreement—Conduct of Business Pending the Effective Time” for a description of the restrictive covenants to which each of SLB and ChampionX is subject.

ChampionX may be unable to attract and retain key employees during the pendency of the Merger.

Current and prospective employees of ChampionX may experience uncertainty about their future roles with the Combined Company following the Merger, which may have an adverse effect on the ability of ChampionX to attract and retain key personnel during the pendency of the Merger. Key employees may depart because of issues relating to the uncertainty and difficulty of integration or a desire not to remain with the Combined Company following the Merger. Accordingly, no assurance can be given that ChampionX will be able to attract and retain key employees to the same extent that ChampionX has been able to in the past.

The ability of ChampionX and SLB to complete the Merger is subject to the approval of ChampionX stockholders, certain closing conditions and the receipt of certain regulatory approvals and clearances that may impose conditions that could adversely affect ChampionX or SLB or cause the Merger to be abandoned.

The Merger Agreement contains certain customary closing conditions, including approval of the Merger Agreement by ChampionX stockholders, the absence of certain injunctions or other legal restraints, the receipt of approval for listing on the NYSE of the shares of SLB common stock as Equity Consideration and such other shares of SLB common stock to be reserved for issuance in connection with the Merger, subject to official notice of issuance, and certain other customary conditions relating to the parties’ representations and warranties in the Merger Agreement and the performance of their respective obligations.

In addition, ChampionX and SLB will be unable to complete the Merger until the expiration or termination of the applicable waiting period under the HSR Act and any commitment to, or agreement with, any governmental entity to delay the consummation of, or not to consummate before a certain date, the Transactions, and the receipt of consents and approvals under certain specified antitrust regulatory laws in Australia, Brazil, Canada, Mexico, New Zealand, Norway, Saudi Arabia and the United Kingdom. Regulatory entities may attempt to impose certain requirements or obligations as conditions for their approval. Consistent with the Merger Agreement, the parties may agree to conditions from these regulators that could adversely impact the Combined Company. If the regulatory clearances are not received, or they are not received on terms that satisfy the conditions set forth in the Merger Agreement, then neither SLB nor ChampionX will be obligated to complete the Merger.

There can be no assurance that the various closing conditions will be satisfied and that the necessary approvals will be obtained, or that any required conditions, requirements or obligations will not materially adversely affect the Combined Company following the Merger. In addition, there can be no assurance that these conditions will not result in the abandonment or delay of the Merger. Any delay in completing the Merger could cause the Combined Company not to realize, or delay the realization of, some or all of the benefits that are expected to be achieved from the Merger. In such context, the date on which the ChampionX stockholders will receive the Equity Consideration is also uncertain.

SLB or ChampionX may waive one or more of the closing conditions without ChampionX re-soliciting stockholder approval.

SLB or ChampionX may determine to waive, in whole or in part, one or more of the conditions to SLB or ChampionX, as the case may be, being obligated to consummate the Merger. Each of SLB and ChampionX currently expects to evaluate the materiality of any waiver and its effect on its respective shareholders/

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stockholders in light of the facts and circumstances at the time to determine whether any amendment of this proxy statement/prospectus or any re-solicitation of proxies by ChampionX is required in light of such waiver. Any determination whether to waive any condition to the consummation of the Merger or of ChampionX to re-solicit stockholder approval or amending or supplementing this proxy statement/prospectus as a result of a waiver will be made by SLB and/or ChampionX at the time of such waiver based on the facts and circumstances as they exist at that time.

Litigation relating to the Merger could result in an injunction preventing completion of the Merger and substantial costs to SLB and ChampionX, and/or may adversely affect the Combined Company’s business, financial condition or results of operations following the Merger.

Securities class action lawsuits and derivative lawsuits are often brought against public companies that have entered into acquisition, merger or other business combination agreements. Even if such a lawsuit is without merit, defending against these claims can result in substantial costs and divert management time and resources. An adverse judgment could result in monetary damages, which could have a negative impact on SLB’s and ChampionX’s respective liquidity and financial condition.

Lawsuits that may be brought against SLB, ChampionX or their respective directors could also seek, among other things, injunctive relief or other equitable relief, including a request to rescind parts of the Merger Agreement already implemented and to otherwise enjoin the parties from consummating the Merger. One of the conditions to the consummation of the Merger is the absence of certain legal restraints, including an order or injunction under certain applicable laws that enjoins, prohibits, prevents, or makes illegal the consummation of the Transactions. Consequently, if a plaintiff is successful in obtaining an injunction prohibiting completion of the Merger, that injunction may delay or prevent the Merger from being completed within the expected timeframe or at all, which may adversely affect SLB’s and ChampionX’s respective business, financial condition, results of operations and cash flows.

There can be no assurance that any of the defendants will be successful in the outcome of any pending or any potential future lawsuits. The defense or settlement of any lawsuit or claim that remains unresolved at the time the Merger is completed may adversely affect SLB’s and ChampionX’s respective business, financial condition, results of operations and cash flows.

SLB shareholders and ChampionX stockholders will not be entitled to appraisal rights in the Merger.

Holders of SLB common stock and ChampionX common stock will not have appraisal rights in connection with the Merger, as more fully described in “The Merger —Appraisal Rights.”

The opinion of ChampionX’s financial advisor does not and will not reflect changes in circumstances between the signing of the Merger Agreement and the completion of the Merger.

The ChampionX Board received an opinion from ChampionX’s financial advisor in connection with the signing of the Merger Agreement. Please refer to the section entitled “Opinion of ChampionX’s Financial Advisor” for additional information. However, ChampionX has not obtained any updated opinion from its financial advisor as of the date of this proxy statement/prospectus. Changes in the operations and prospects of ChampionX or SLB, general market and economic conditions and other factors that may be beyond the control of ChampionX or SLB, and on which the financial advisor’s opinion was based, may significantly alter the value of ChampionX or SLB or the prices of their respective stock by the time the Merger is completed. The opinion does not speak as of the time the Merger will be completed or as of any date other than the date of such opinion. Because ChampionX does not currently anticipate asking its financial advisor to update its opinion, such opinion will not address the fairness, from a financial point of view, to the holders of ChampionX common stock (other than holders of shares of ChampionX Excluded Stock or any shares of ChampionX common stock held by an affiliate of ChampionX or SLB) of the Exchange Ratio at the time the Merger is completed or as of the date of this proxy statement/

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prospectus. The ChampionX Board’s recommendation that ChampionX stockholders vote in favor of the Merger Proposal, the Compensation Proposal and the Adjournment Proposal, however, are made as of the date of this proxy statement/prospectus.

The financial projections prepared by ChampionX management are based on various assumptions that may not be realized.

The Forecasts included under the section “The Merger—ChampionX Unaudited Prospective Financial Information Reviewed by the ChampionX Board and Centerview” of this proxy statement/prospectus were based on assumptions of, and information available to, ChampionX management when prepared, and those estimates and assumptions are subject to uncertainties, many of which are beyond ChampionX’s control and may not be realized. Many factors mentioned in this proxy statement/prospectus, including the risks outlined in this “Risk Factors” section and the events or circumstances described under the section entitled “Cautionary Statement Regarding Forward-Looking Statements” of this proxy statement/prospectus, will be important in determining the Combined Company’s future results. As a result of these contingencies, actual future results may vary materially from the estimates. In view of these uncertainties, the inclusion of financial estimates in this proxy statement/prospectus is not and should not be viewed as a representation that the forecasted results will necessarily reflect actual future results. None of ChampionX or its affiliates, advisors, officers, directors, partners or representatives can give you any assurance that actual results will not differ materially from the Forecasts, and none of them undertake any obligation to update or otherwise revise or reconcile the projections to reflect circumstances existing after the date the projections were generated or to reflect the occurrence of future events.

The Forecasts included under the section entitled “The Merger—ChampionX Unaudited Prospective Financial Information Reviewed by the ChampionX Board and Centerview” of this proxy statement/prospectus were not prepared with a view toward compliance with published guidelines of the SEC or the guidelines established by the American Institute of Certified Public Accountants for preparation or presentation of prospective financial information. Further, any forward-looking statement speaks only as of the date on which it is made and does not take into consideration the impact of events and circumstances occurring after such date. Neither ChampionX nor SLB undertakes any obligation, other than as required by applicable law, to update the financial estimates herein to reflect events or circumstances after the date those financial estimates were prepared or to reflect the occurrence of anticipated or unanticipated events or circumstances. None of ChampionX’s, SLB’s or any other independent accountants have compiled, examined or performed any procedures with respect to such information, nor have any independent accountants expressed any opinion or any other form of assurance on such information or achievability thereof, and, accordingly, such independent accountants assume no responsibility for, and disclaim any association with, such forward-looking financial information. The audit reports of PricewaterhouseCoopers LLP incorporated by reference herein relate exclusively to the historical financial information of the entities named in those reports and do not cover any other information in this proxy statement/prospectus and should not be read to do so. See the section entitled “The Merger—ChampionX Unaudited Prospective Financial Information Reviewed by the ChampionX Board and Centerview” for more information.

The Merger Agreement contains restrictions on the ability of ChampionX to pursue other alternatives to the Merger.

The Merger Agreement contains provisions that make it more difficult for ChampionX to sell its business to a party other than SLB. Specifically, the Merger Agreement contains non-solicitation provisions that, subject to limited exceptions, restrict the ability of ChampionX to solicit, initiate, knowingly encourage or knowingly facilitate any competing acquisition proposal. Further, subject to limited exceptions, consistent with applicable law, the Merger Agreement provides that the ChampionX Board will not withhold, withdraw, amend, qualify or modify, or publicly propose to withhold, withdraw, amend, modify or qualify, in any manner adverse to SLB, its recommendation that ChampionX stockholders vote in favor of the Merger Proposal. In specified circumstances, SLB has a right to negotiate with ChampionX in order to match any competing acquisition proposals that may be

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made. Although the ChampionX Board is permitted to take certain actions in response to a superior proposal or a competing acquisition proposal that is reasonably likely to result in a superior proposal if it determines that the failure to do so would be inconsistent with its fiduciary duties, doing so in specified situations could give SLB the right to terminate the Merger Agreement and require ChampionX to pay to SLB a termination fee of $265.4 million. See the section entitled “The Merger Agreement—Certain Additional Agreements—No Solicitation; Recommendation,” the section entitled “The Merger Agreement—Termination, Amendment and Waiver—Termination” and the section entitled “The Merger Agreement—Termination, Amendment and Waiver—Fees and Expenses” for a more complete discussion of these restrictions and consequences.

Such provisions could discourage a potential acquiror that might have an interest in making a proposal from considering or proposing any such acquisition, even if it were prepared to pay consideration with a higher value than that to be paid in the Merger. There also is a risk that the requirement for ChampionX to pay the termination fee to SLB in certain circumstances may result in a potential acquiror proposing to pay a lower per share price to acquire ChampionX than it might otherwise have proposed to pay.

Completion of the Merger may trigger change in control or other provisions in certain agreements to which ChampionX or any of its respective subsidiaries or joint ventures is a party.

The completion of the Merger may trigger change in control or other provisions in certain agreements to which ChampionX or any of its respective subsidiaries or joint ventures is a party. If ChampionX is unable to negotiate waivers of those provisions, the counterparties may exercise their rights and remedies under such agreements, potentially terminate such agreements, or seek monetary damages. Even if ChampionX is able to negotiate waivers, the counterparties may require a fee for such waivers or seek to renegotiate such agreements on terms less favorable to ChampionX or the applicable subsidiary or joint venture. If ChampionX’s suppliers were to seek to terminate or modify their supplier arrangements, then ChampionX or its respective subsidiaries or joint ventures may be unable to procure necessary supplies or services from other suppliers in a timely and efficient manner and on acceptable terms, or at all.

SLB and ChampionX may be unable to complete the Merger.

If the Merger is not completed for any reason, including as a result of failure to obtain required regulatory approvals or if the ChampionX stockholders fail to approve the Merger Proposal, the market price of SLB common stock and ChampionX common stock may be adversely affected and, without realizing any of the benefits of having completed the Merger, SLB and ChampionX would be subject to a number of risks, including: (i) SLB and ChampionX may experience negative reactions from the financial markets, customers, suppliers and other constituencies, (ii) SLB and ChampionX will still be required to pay certain significant costs relating to the Merger such as legal, accounting, financial advisor, and printing fees and (iii) if the Merger is terminated under certain circumstances, ChampionX may be required to pay SLB a termination fee of $265.4 million or SLB may be required to pay ChampionX a termination fee of $326.6 million. In addition, SLB or ChampionX may elect to terminate the Merger Agreement in accordance with its terms in certain circumstances as described in the section entitled “The Merger Agreement—Termination; Amendment and Waiver.”

Risks Relating to the Combined Company Upon Completion of the Merger

The Combined Company could incur substantial expenses related to the Merger and the integration of ChampionX and SLB.

ChampionX and SLB expect that the Combined Company will incur substantial expenses in connection with the Merger and the integration of their respective businesses, policies, procedures, operations, technologies and systems. In addition, the Combined Company will be required to devote management attention and resources to integrating its business practices and operations, and prior to the Merger, management attention and resources will be required to plan for such integration. There are a large number of systems that must be integrated,

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including information management, purchasing, accounting and finance, sales, billing, payroll and benefits, and regulatory compliance. There are a number of factors beyond the control of either party that could affect the total amount or the timing of all of the expected integration expenses. Moreover, many of the expenses that will be incurred, by their nature, are difficult to estimate accurately at the present time. These expenses could, particularly in the near term, reduce the savings that SLB expects to achieve from the elimination of duplicative expenses, as well as delay the realization of economies of scale, cost savings and revenue enhancements related to the integration of the businesses following the completion of the Merger. Accordingly, any anticipated net benefits may not be achieved in the near term or at all. These integration expenses may result in the Combined Company taking significant charges against earnings following the completion of the Merger. Furthermore, there can be no assurance that the elimination of certain duplicative costs, as well as the realization of other efficiencies related to the integration of the two businesses, will offset the incremental transaction-related costs over time.

Following the Merger, the Combined Company may be unable to successfully integrate ChampionX’s and SLB’s businesses and realize the anticipated benefits or synergies of the Merger.

The Merger involves the combination of two companies that historically have operated and currently operate as independent public companies. The combination of two independent public companies is a complex, costly and time-consuming process.

The success of SLB’s acquisition of ChampionX will depend in large part on the success of the management of the Combined Company in integrating the operations, strategies, technologies and personnel of the two companies following the completion of the Merger, without adversely affecting current revenues and investments in future growth.

Achieving these goals requires, among other things, realization of the targeted cost and commercial synergies expected from the Merger. If the Combined Company is not able to achieve these objectives and realize the anticipated benefits and synergies expected from the Merger within the anticipated timing or at all, the Combined Company’s business, financial condition and results of operations may be adversely affected, SLB’s earnings per share after completion of the Merger may be diluted, the accretive effect of the Merger may decrease or be delayed, and the share price of SLB common stock may be negatively impacted.

Potential issues and difficulties the Combined Company may encounter in the integration process include the following:

In addition, even if the businesses of ChampionX and SLB are integrated successfully, the full benefits of the Transactions, including the synergies, cost savings, or sales or growth opportunities that are expected, may not be

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realized within the anticipated time frame or at all. Further, additional unanticipated costs may be incurred in the integration of the businesses of ChampionX and SLB. All of these factors could decrease or delay the expected accretive effect of the Merger and negatively impact the Combined Company’s results of operations.

Business issues currently faced by one company may be imputed to the operations of the other company.

To the extent that either SLB or ChampionX currently has or is perceived by customers to have operational challenges, such as on-time performance, safety issues or workforce issues, those challenges may raise concerns by existing customers of the other company following the Merger which may limit or impede the Combined Company’s future ability to obtain additional work from those customers.

Each of ChampionX and SLB may have liabilities that are not known to the other party.

Each of ChampionX and SLB may have liabilities that the other party failed, or was unable, to discover in the course of performing its respective due diligence investigations. ChampionX and SLB may learn additional information about the other party that materially adversely affects it, such as unknown or contingent liabilities and liabilities related to compliance with applicable laws. As a result of these factors, the Combined Company may incur additional costs and expenses and may be forced to later write-down or write-off assets, restructure operations or incur impairment or other charges that could result in the Combined Company reporting losses. Even if ChampionX’s and SLB’s due diligence has identified certain risks, unexpected risks may arise and previously known risks may materialize in a manner not consistent with its preliminary risk analysis. If any of these risks materialize, this could have a material adverse effect on the Combined Company’s financial condition and results of operations and could contribute to negative market perceptions about the SLB common stock.

The Combined Company may not be able to retain customers or suppliers, and customers or suppliers may seek to modify contractual obligations with the Combined Company.

As a result of the Merger, the Combined Company may experience adverse effects on relationships with customers and suppliers that may harm the Combined Company’s business and results of operations. Certain customers or suppliers may seek to terminate or modify contractual obligations following the Merger whether or not contractual rights are triggered as a result of the Merger. There can be no guarantee that customers and suppliers will remain with or continue to have a relationship with the Combined Company or do so on the same or similar contractual terms following the Merger. If any customers or suppliers seek to terminate or modify contractual obligations or discontinue their relationships with the Combined Company, then the Combined Company’s business and results of operations may be harmed.

Failure to retain key employees and skilled workers could adversely affect the Combined Company following the Merger.

The Combined Company’s performance following the Merger could be adversely affected if it is unable to retain certain key employees and skilled workers of ChampionX. It is possible that these employees may decide not to remain with ChampionX while the Merger is pending or with the Combined Company after the Merger is completed. The loss of the services of one or more of these key employees and skilled workers could adversely affect the future operating results of the Combined Company because of their experience and knowledge of ChampionX’s business. In addition, current and prospective employees of ChampionX may experience uncertainty about their future roles with ChampionX until after the Merger is completed. This may adversely affect the ability of ChampionX to attract and retain key personnel, which could adversely affect the Combined Company’s performance following the Merger, and could diminish the anticipated benefits of the Merger. No assurance can be given that the Combined Company, following the Merger, will be able to retain or attract key management personnel and other key employees of ChampionX and SLB to the same extent that ChampionX and SLB have previously been able to retain or attract their own employees.

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SLB and ChampionX must obtain certain regulatory approvals and clearances to consummate the Merger, which, if delayed, not granted or granted with unacceptable conditions, could prevent, substantially delay or impair consummation of the Merger, result in additional expenditures of money and resources or reduce the anticipated benefits of the Merger.

The Merger is subject to review by antitrust regulators in the United States under the HSR Act. Under the HSR Act, SLB and ChampionX are required to make premerger notification filings and to await the expiration or early termination of the statutory waiting period (and any extension of the waiting period) prior to completing the Merger. On April 23, 2024, SLB and ChampionX each filed a Premerger Notification and Report Form under the HSR Act. The Merger is also subject to antitrust review by government authorities in several non-U.S. jurisdictions, including Australia, Brazil, Canada, Mexico, New Zealand, Norway, Saudi Arabia and the United Kingdom. The parties have made or may make additional antitrust filings in certain other jurisdictions outside the United States. The completion of the Merger is subject to the receipt of clearance by antitrust authorities in the United States and in specified non-U.S. jurisdictions. Such conditions or changes and the process of obtaining regulatory approvals could have the effect of delaying or impeding consummation of the Merger or of imposing additional costs or limitations on the Combined Company following completion of the Merger, any of which might have an adverse effect on the Combined Company following completion of the Merger and may diminish the anticipated benefits of the Merger. For additional information about the regulatory approvals process see “The Merger Agreement—Certain Additional Agreements—Regulatory Approvals.”

Risks to SLB Common Stock Following the Merger

The trading price and volume of SLB common stock may be volatile following completion of the Merger.

The trading price and volume of SLB common stock may be volatile following completion of the Merger. The stock markets in general have experienced extreme volatility that has often been unrelated to the operating performance of particular companies. These broad market fluctuations may adversely affect the trading price of SLB common stock. As a result, SLB shareholders and ChampionX stockholders who receive SLB common stock upon completion of the Merger may suffer a loss on their investment. Many factors may impair the market for SLB common stock and the ability of investors to sell shares at an attractive price and could also cause the market price and demand for SLB common stock to fluctuate substantially, which may negatively affect the price and liquidity of SLB common stock. The market for SLB common stock will depend on a number of factors and conditions, many of which are beyond the control of the Combined Company or its stockholders.

The market value of SLB common stock could decline if large amounts of SLB common stock are sold following the Merger.

Following the Merger, SLB shareholders and former ChampionX stockholders will own interests in the Combined Company operating an expanded business with more assets and a different mix of liabilities. Current stockholders of SLB and ChampionX may not wish to continue to invest in the Combined Company, or may wish to reduce their investment in the Combined Company, in order to comply with institutional investing guidelines, to increase diversification or to track any rebalancing of stock indices in which SLB common stock or CHX common stock is currently included. If, following the Merger, large amounts of SLB common stock are sold, or if a perception in the market manifests that such dispositions could occur, the price of SLB common stock could decline.

The Merger may not be accretive, and may be dilutive, to SLB’s earnings per share in the near term, which may negatively affect the market price of SLB common stock.

While SLB anticipates that the Merger will be accretive to its earnings per share in 2026, this expectation is based on preliminary estimates that may materially change, and the Merger may be dilutive to earnings per share in the near term. In addition, future events and conditions could decrease or delay any accretion, result in dilution or cause greater dilution than is currently expected, including:

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Any dilution of, or decrease or delay of any accretion to, SLB’s earnings per share could cause the price of SLB common stock to decline.

The shares of SLB common stock to be received by ChampionX stockholders upon the completion of the Merger will have different rights from shares of ChampionX common stock.

Upon completion of the Merger, ChampionX stockholders will no longer be stockholders of ChampionX, a Delaware corporation, but will instead become stockholders of SLB, a company organized under the laws of Curaçao, and their rights as stockholders will be governed by Curaçao law and SLB’s articles of incorporation and by-laws. Curaçao law and the terms of SLB’s articles of incorporation and by-laws may be materially different than Delaware law and the terms of ChampionX’s second amended and restated certificate of incorporation and amended and restated by-laws, which currently govern the rights of ChampionX stockholders. Please see “Comparison of Shareholder Rights” for a discussion of the different rights associated with SLB common stock.

Tax Risks Related to the Merger

ChampionX stockholders will receive no cash consideration, other than cash in lieu of fractional shares of SLB common stock, with which to pay any potential tax liability resulting from the Merger.

Although ChampionX stockholders will receive no cash consideration in the Merger other than any cash received in lieu of fractional shares of SLB common stock, the receipt of SLB common stock and any cash in lieu of fractional shares of SLB common stock by ChampionX stockholders in exchange for ChampionX common stock in the Merger will be treated as a taxable transaction for U.S. federal income tax purposes. The amount of income, gain or loss recognized by each ChampionX stockholder in the Merger will vary depending on each ChampionX stockholder’s particular situation, including the fair market value of the SLB common stock, the amount of any cash in lieu of fractional shares of SLB common stock received by such stockholder in the Merger, and the adjusted tax basis of the ChampionX common stock exchanged by such stockholder in the Merger. Please refer to the section entitled “The Merger—Material U.S. Federal Income Tax Consequences” of this proxy statement/prospectus for a description of the material U.S. federal income tax consequences of the Merger.

Other Risks Relating to ChampionX and SLB

SLB and ChampionX are, and following completion of the Merger, the Combined Company will continue to be, subject to the risks described above. In addition, SLB is, and will continue to be, subject to the risks described in Part I, Item 1A in SLB’s Annual Report on Form 10-K for the year ended December 31, 2023, filed with the SEC on January 24, 2024, and in Part II, Item 1A of SLB’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2024, filed with the SEC on April 24, 2024, and ChampionX is, and will continue to be, subject to the risks described in Part I, Item 1A in ChampionX’s Annual Report on Form 10-K for the year ended December 31, 2023, filed with the SEC on February 6, 2024, and in Part II, Item 1A of ChampionX’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2024, filed with the SEC on April 25, 2024, each of which is incorporated by reference into this proxy statement/prospectus. See the section entitled “Where You Can Find More Information” for a description of the information incorporated by reference in this proxy statement/prospectus.

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CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS

This proxy statement/prospectus and the documents incorporated by reference herein include “forward-looking statements” about SLB, ChampionX and the Combined Company within the meaning of Section 27A of the Securities Act of 1933, as amended (the “Securities Act”), Section 21E of the Exchange Act, and the Private Securities Litigation Reform Act of 1995. The opinions, forecasts, projections, expected timetable for completing the Transactions, benefits and synergies of the Transactions, future opportunities for the Combined Company, future financial performance, and any other statements regarding SLB’s and ChampionX’s future expectations, beliefs, plans, objectives, financial conditions, or assumptions, or future events or performance that are not statements of historical fact, are forward-looking statements. Similarly, statements that describe future plans, objectives or goals or future revenues or other financial metrics are also forward-looking statements. Although SLB and ChampionX believe that the expectations reflected in such forward-looking statements are reasonable, they can give no assurances that such expectations will prove to have been correct. These statements are subject to, among other things, satisfaction of the closing conditions to the Merger, the risk that the contemplated Merger does not occur, negative effects from the pendency of the Merger, the ability to successfully integrate SLB’s and ChampionX’s respective businesses and to realize expected synergies, the risk that ChampionX and the Combined Company will not be able to retain key employees, expenses of the Merger, the timing to consummate the Transactions and other risk factors.

Except for their respective obligations to disclose material information under U.S. federal securities laws, neither SLB nor ChampionX undertakes any obligation to release publicly any revisions to any forward-looking statements, to report events or circumstances after the date of this document, or to report the occurrence of unanticipated events.

Statements that are predictive in nature, that depend upon or refer to future events or conditions, or that include words such as “would,” “should,” “plans,” “likely,” “expects,” “anticipates,” “intends,” “believes,” “estimates,” “thinks,” “may,” “projects,” “predicts,” “anticipates,” “creates,” “could,” “will,” “guidance,” “looks,” “goals,” “potential,” “future,” “builds,” “focus,” “continues,” “strives” or the negative of such terms or other variations thereof and similar expressions, are forward-looking statements. However, the absence of these words does not mean that the statements are not forward-looking. The following important factors, in addition to those discussed under the section entitled “Risk Factors” and elsewhere in this proxy statement/prospectus and the documents incorporated by reference herein, could affect the future results of the oil and gas industry in general, and the Combined Company after the Merger in particular, and could cause those results to differ materially from those expressed in or implied by such forward-looking statements:

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The foregoing list of factors should not be construed to be exhaustive. Many factors mentioned in this proxy statement/prospectus, including the risks outlined under the caption “Risk Factors” contained in the Exchange Act reports of SLB and ChampionX, incorporated herein by reference, will be important in determining future results, and actual future results may vary materially.

All subsequent written and oral forward-looking statements attributable to SLB or ChampionX or to persons acting on their behalf are expressly qualified in their entirety by reference to these risks and uncertainties. There is no assurance that the actions, events or results of the forward-looking statements will occur, or, if any of them do, when they will occur or what effect they will have on the business, results of operations, financial condition or cash flows of SLB or ChampionX or the Combined Company. In light of these uncertainties, you should not

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place undue reliance on forward-looking statements. Each forward-looking statement speaks only as of the date of the particular statement, and neither SLB nor ChampionX undertakes any obligation to publicly update or revise any forward-looking statements except as required by law.

For additional information with respect to these factors, see the section entitled “Where You Can Find More Information.”

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THE COMPANIES

ChampionX Corporation

ChampionX is a global leader in chemistry solutions, artificial lift systems and highly engineered equipment and technologies that help companies drill for and produce oil and gas safely, efficiently and sustainably around the world. ChampionX’s expertise, innovative products, and digital technologies products provide enhanced oil and gas production, transportation, and real-time emissions monitoring throughout the lifecycle of a well. ChampionX has a presence in more than 60 countries with more than 7,300 employees.

ChampionX operates its business in four segments: Production Chemical Technologies, Production & Automation Technologies, Drilling Technologies and Reservoir Chemical Technologies. Production Chemical Technologies offers products and services that cover a broad range of onshore, offshore, and oil sands chemical solutions in production and midstream operations that are built upon ChampionX’s foundation of deep expertise and capabilities in chemical applications across the oil and natural gas value chain. Production & Automation Technologies offers products, technologies, and services that facilitate the safe, efficient, and cost-effective extraction of oil and gas through artificial lift and digital automation applications. Drilling Technologies offers innovative, industry leading polycrystalline diamond cutter inserts, bearings, valves, nozzles and mining tools to help customers drill the world’s most demanding oil exploration and development projects and for use in other industries. Reservoir Chemical Technologies offers chemistry-oriented solutions and technologies to help customers meet their performance, efficiency, sustainability, and financial objectives for well drilling, cementing, fracturing, acidizing, and other well interventions.

The principal United States market for ChampionX common stock is Nasdaq, where it is traded under the symbol “CHX.”

ChampionX’s rich history is built on over a century of experience, dating back to the 1800s and the petroleum industry’s infancy. ChampionX is incorporated under the laws of Delaware, with its corporate headquarters located at 2445 Technology Forest Blvd., Building 4, Suite 1200, The Woodlands, TX 77381, and its phone number is (281) 403-5772.

Schlumberger Limited (Schlumberger N.V.)

SLB is a global technology company focused on driving energy innovation for a balanced planet. With a global presence in more than 100 countries and employees representing almost twice as many nationalities, SLB works each day on innovating oil and gas, delivering digital at scale, decarbonizing industries, and developing and scaling new energy systems that accelerate the energy transition.

With a workforce of approximately 111,000 people, SLB is organized under four Divisions: Digital & Integration, Reservoir Performance, Well Construction and Production Systems. SLB’s four Divisions operate through a geographical structure of four Basins that are aligned with critical concentrations of activity: Americas Land, Offshore Atlantic, Middle East & North Africa, and Asia. The Basins are configured around common regional characteristics that enable SLB to deploy fit-for-purpose technologies, operating models, and skills to meet the specific customer needs in each Basin. The Basins are further organized into GeoUnits, which can be a region, a single country, or made up of several countries. With a strong focus on customers, the Basins identify opportunities for growth, and are focused on agility, responsiveness, and competitiveness.

The principal U.S. market for SLB common stock is the NYSE, where it is traded under the symbol “SLB.” SLB common stock is also listed for trading on the Euronext Paris.

SLB was founded in 1926 and is incorporated under the laws of Curaçao, with executive offices in Paris, Houston, London and The Hague. SLB’s executive offices in the United States are at 5599 San Felipe, Houston, Texas 77056, and its telephone number is (713) 513-2000.

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Sodium Holdco, Inc.

Sodium Holdco, Inc., which we refer to as Holdco, is a Delaware corporation and an indirect wholly owned subsidiary of SLB. Holdco has not carried on any activities to date, other than activities incidental to its formation or undertaken in connection with the Transactions.

Sodium Merger Sub, Inc.

Sodium Merger Sub, Inc., which we refer to as Merger Sub, is a Delaware corporation and a direct wholly owned subsidiary of Sodium Holdco, Inc. Merger Sub has not carried on any activities to date, other than activities incidental to its formation or undertaken in connection with the Transactions.

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THE CHAMPIONX SPECIAL MEETING

This section contains information about the ChampionX Special Meeting at which ChampionX stockholders will be asked to consider and vote on proposals to (i) adopt the Merger Agreement, (ii) approve, by a non-binding, advisory vote, the compensation that may become payable to ChampionX’s named executive officers in connection with the Merger and (iii) approve the adjournment of the ChampionX Special Meeting, if necessary, (1) to solicit additional proxies in favor of the Merger Proposal if (a) there are holders of an insufficient number of shares of ChampionX common stock present online or represented by proxy and entitled to vote at the ChampionX Special Meeting to constitute a quorum at such meeting or (b) there are insufficient votes at the time of such adjournment to approve the Merger Proposal or (2) to allow reasonable additional time for the filing and mailing of any required supplement or amendment to this proxy statement/prospectus, and the review of such materials by ChampionX stockholders.

ChampionX is furnishing this proxy statement/prospectus to its stockholders in connection with the solicitation of proxies to be voted at the ChampionX Special Meeting. ChampionX stockholders are encouraged to read the entire document carefully, including the annexes to this document, for more detailed information regarding the Merger Agreement and the Transactions.

Date, Time and Place

The ChampionX Special Meeting will be held via a live webcast at https://meetnow.global/M6YL2F7, on June 18, 2024 at 9:00 a.m. Central Time (unless it is adjourned or postponed to a later date).

The ChampionX Special Meeting can be accessed by visiting https://meetnow.global/M6YL2F7, where ChampionX stockholders will be able to participate and vote online during the ChampionX Special Meeting. ChampionX encourages its stockholders to access the meeting early—approximately 15 minutes before the start of the meeting. Please follow the instructions as outlined in this proxy statement/prospectus.

Participating in the Special Meeting

Holders of record of ChampionX at the close of business on May 14, 2024 are entitled to attend and vote on the matters presented at the ChampionX Special Meeting.

To be admitted to the ChampionX Special Meeting, ChampionX stockholders must enter the 15-digit control number found on their proxy card. ChampionX stockholders whose stock is held in a stock brokerage account or by a bank or other nominee must register in advance to attend the ChampionX Special Meeting. To register, each such ChampionX stockholder must request proof of their proxy power reflecting their ChampionX holdings from their broker or other nominee and submit it along with their name and email address to Computershare, ChampionX’s transfer agent. Requests for registration must be labeled “Legal Proxy” and be received no later than June 13, 2024 by 5:00 p.m. Eastern Time. Such ChampionX stockholders will receive confirmation of their registration by email after Computershare receives their registration materials. Registration materials and information should be sent: by email to legalproxy@computershare.com, or by mail to Computershare, ChampionX Legal Proxy, P.O. Box 43001, Providence, RI 02940-300. Once properly admitted to the ChampionX Special Meeting, ChampionX stockholders may vote their shares by following the instructions available on the meeting website during the meeting. If you experience technical difficulties, you may contact the technical support number at 1-888-724-2416 (inside the United States and Canada) or 1-781-575-2748 (all other locations).

Questions regarding matters presented at the ChampionX Special Meeting may be submitted during the meeting through the meeting’s website. Additional information regarding rules and procedures for participating in the virtual meeting will be provided in the meeting rules of conduct, which you will be able to view during the meeting on the meeting website.

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Purpose of the Special Meeting

At the ChampionX Special Meeting, ChampionX stockholders will be asked to consider and vote on:

ChampionX’s stockholders must approve the Merger Proposal in order for the Merger to be consummated. If ChampionX’s stockholders fail to approve the Merger Proposal, the Merger will not be consummated. The votes on the Compensation Proposal and Adjournment Proposal are separate and apart from the vote on the Merger Proposal. Accordingly, a ChampionX stockholder may vote in favor of the Compensation Proposal and/or the Adjournment Proposal and vote not to approve the Merger Proposal.

Recommendation of the ChampionX Board of Directors

After careful consideration, the ChampionX Board has unanimously (i) determined the Merger Agreement and the consummation of the Merger and the Transactions, to be fair to and in the best interests of ChampionX and its stockholders, (ii) declared the Merger Agreement and the consummation of the Transactions, including the Merger, to be advisable, (iii) authorized and approved the Merger Agreement, including the execution, delivery and performance thereof, (iv) directed that the Merger Agreement be submitted to the ChampionX stockholders for their consideration and adoption and (v) recommended the ChampionX stockholders adopt the Merger Agreement.

ACCORDINGLY, THE CHAMPIONX BOARD UNANIMOUSLY RECOMMENDS A VOTE “FOR” THE MERGER PROPOSAL, A VOTE “FOR” THE COMPENSATION PROPOSAL AND A VOTE “FOR” THE ADJOURNMENT PROPOSAL.

ChampionX stockholders should carefully read this document in its entirety for more detailed information concerning the Merger Agreement and the Transactions, including the Merger. In particular, ChampionX stockholders are directed to the Merger Agreement, which is attached hereto as Annex A.

Record Date; Stockholders Entitled to Vote

The record date for determining the ChampionX stockholders entitled to receive notice of, and to vote at, the ChampionX Special Meeting or at any adjournment or postponement thereof, is the close of business on May 14, 2024.

As of the record date, there were 190,579,933 shares of ChampionX common stock entitled to vote at the ChampionX Special Meeting. Each such holder will be entitled to one vote for each share of ChampionX common stock that it owned on the record date.

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Quorum

A “quorum” for purposes of the ChampionX Special Meeting consists of the holders of a majority of issued and outstanding shares of ChampionX common stock present online or represented by proxy and entitled to vote at the ChampionX Special Meeting. There must be a quorum for the ChampionX Special Meeting to be held. In the absence of a quorum at the ChampionX Special Meeting, the chair of the meeting, or the affirmative vote of holders of at least a majority of the outstanding shares of ChampionX common stock, present online or represented by proxy and entitled to vote, at the ChampionX Special Meeting, though less than a quorum, may adjourn the ChampionX Special Meeting to a later date and time (subject to applicable law and compliance with the terms of the current amended and restated by-laws of ChampionX).

If you submit a timely, properly executed proxy or voting instruction form, then you will be considered part of the quorum so long as your shares are voted on at least one item of business, other than a procedural motion. Abstentions will be counted for purposes of determining whether there is a quorum at the ChampionX Special Meeting. A broker non-vote occurs when a beneficial owner does not provide voting instruction to their broker or custodian with respect to a proposal on which such broker or custodian does not have discretionary authority to vote. If you are a “street name” holder of shares of ChampionX common stock and you do not provide your bank, broker, trust or other nominee with voting instructions, then your shares will not be counted in determining the presence of a quorum. The ChampionX Special Meeting will be adjourned or postponed, if necessary, (1) to solicit additional proxies in favor of the Merger Proposal if (a) there are holders of an insufficient number of shares of ChampionX common stock present online or represented by proxy and entitled to vote at the ChampionX Special Meeting to constitute a quorum at such meeting or (b) there are insufficient votes at the time of such adjournment to approve the Merger Proposal or (2) to allow reasonable additional time for the filing and mailing of any required supplement or amendment to this proxy statement/prospectus, and the review of such materials by ChampionX stockholders.

Vote Required for Approval

Merger Proposal. The approval of the Merger Proposal requires, assuming a quorum is present, the affirmative vote of the holders of a majority of the outstanding shares of ChampionX common stock entitled to vote at the ChampionX Special Meeting. Abstentions, a broker non-vote or a failure to vote will have the same effect as a vote “AGAINST” the Merger Proposal.

Compensation Proposal. The approval of the Compensation Proposal requires, assuming a quorum is present, affirmative vote of the holders of a majority of the voting power of ChampionX present online or represented by proxy and entitled to vote on such matter at the ChampionX Special Meeting. Although the ChampionX Board intends to consider the vote resulting from this proposal, the vote is advisory only and, therefore, is not binding on ChampionX or any of its subsidiaries, and, if the Merger Agreement is approved by ChampionX stockholders and the Merger is consummated, the compensation that is based on or otherwise relates to the Merger will be payable to ChampionX’s named executive officers (to the extent that ChampionX is contractually obligated to pay the compensation) even if the Compensation Proposal is not approved. Abstentions will have the same effect as a vote “AGAINST” the Compensation Proposal. Broker non-votes and failure of any ChampionX stockholder to submit a vote (e.g., by not submitting a proxy or not voting online) will have no effect on approval of the Compensation Proposal.

Adjournment Proposal. Approval of the Adjournment Proposal requires, whether or not a quorum is present, the affirmative vote of the holders of a majority of the voting power of ChampionX present online or represented by proxy and entitled to vote on such matter at the ChampionX Special Meeting. Abstentions will have the same effect as a vote “AGAINST” the Adjournment Proposal. Broker non-votes and failure of any ChampionX stockholders to submit a vote (e.g., by not submitting a proxy or not voting online) will have no effect on approval of the Adjournment Proposal.

Failure to Vote; Abstentions; Broker Non-Votes

A failure of any ChampionX stockholder to submit a vote (e.g., by not submitting a proxy or not voting online) occurs when a ChampionX stockholder is not present online or represented by proxy and entitled to vote at the ChampionX Special Meeting.

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An abstention occurs when a ChampionX stockholder is present for purposes of a quorum by virtually attending the ChampionX Special Meeting and either does not vote or submits a ballot marked “abstain.” An abstention also occurs when a ChampionX stockholder does not attend the ChampionX Special Meeting and instead submits a proxy with an “abstain” instruction. Abstentions will be counted for purposes of determining whether there is a quorum at the ChampionX Special Meeting.

Under the applicable rules that govern brokers who have record ownership of shares of ChampionX common stock that they hold in “street name” for their clients who are the beneficial owners of the ChampionX common stock, brokers have the discretion to vote such ChampionX common stock on routine matters, but not on non-routine matters, including the Merger Proposal, the Compensation Proposal and the Adjournment Proposal, absent direction from the ChampionX stockholder. Broker non-votes occur when shares of ChampionX common stock held by a broker are not voted with respect to a proposal because (i) the broker has not received voting instructions from the beneficial owner, and (ii) the broker lacks the authority to vote the ChampionX shares of common stock at his or her discretion. Because it is expected that all of the matters to be voted on at the ChampionX Special Meeting will be non-routine under applicable stock exchange rules, brokers and custodians will not have discretionary authority to vote on any such proposal; therefore, if you do not provide voting instructions to your broker or custodian, your ChampionX common stock will not count towards determining whether a quorum is present and your ChampionX common stock will not be voted on any of the proposals.

Because approval of the Merger Proposal requires, assuming a quorum is present, the affirmative vote of the holders of a majority of the outstanding shares of ChampionX common stock entitled to vote at the ChampionX Special Meeting, the failure of any ChampionX stockholder to submit a vote (e.g., by not submitting a proxy or not voting online), any abstention by a ChampionX stockholder and a broker non-vote will have the same effect as a vote “AGAINST” approval of the Merger Proposal.

Because approval of the Compensation Proposal requires, assuming a quorum is present, the affirmative vote of the holders of a majority of the voting power of ChampionX present online or represented by proxy and entitled to vote on such matter at the ChampionX Special Meeting, abstentions are counted as shares present and entitled to vote and will have the same effect as votes “AGAINST” the Compensation Proposal. A failure of any ChampionX stockholder to submit a vote (e.g., by not submitting a proxy or not voting online) and a broker non-vote will have no effect on the approval of the Compensation Proposal.

Because approval of the Adjournment Proposal requires, whether or not a quorum is present, the affirmative vote of the holders of a majority of the voting power of ChampionX present online or represented by proxy and entitled to vote on such matter at the ChampionX Special Meeting, abstentions are counted as shares present and entitled to vote and will have the same effect as votes “AGAINST” the Adjournment Proposal. A failure of any ChampionX stockholder to submit a vote (e.g., by not submitting a proxy or not voting online) and a broker non-vote will have no effect on the approval of the Adjournment Proposal.

How to Vote

ChampionX stockholders of record may submit their proxies:

ChampionX stockholders whose shares are held in “street name” must provide their broker, nominee, fiduciary or other custodian with instructions on how to vote their shares; otherwise, their broker, nominee, fiduciary or other

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custodian will not vote their shares on any of the proposals before the ChampionX Special Meeting. ChampionX stockholders should check the voting form provided by their broker, nominee, fiduciary or other custodian for instructions on how to vote their shares.

YOU SHOULD NOT SEND IN YOUR STOCK CERTIFICATE(S) WITH YOUR PROXY CARD.

Revocation of Proxies

You may revoke your proxy at any time prior to a vote at the ChampionX Special Meeting by:

Please note that if your shares are held in the name of a broker, bank, trust company or other nominee, you may change your voting instructions by submitting new voting instructions to your broker, bank, trust company or other nominee in accordance with its established procedures. If your shares are held in the name of a broker, bank, trust company or other nominee and you decide to change your vote by attending the ChampionX Special Meeting and voting in person, your vote in person at the ChampionX Special Meeting will not be effective unless you have obtained and present a “legal proxy” executed in your favor from the record holder (your broker, bank, trust company or other nominee).

Adjournments and Postponements

Any adjournment of the ChampionX Special Meeting, if necessary, (1) to solicit additional proxies in favor of the Merger Proposal if (a) there are holders of an insufficient number of shares of ChampionX common stock present online or represented by proxy and entitled to vote at the ChampionX Special Meeting to constitute a quorum at such meeting or (b) there are insufficient votes at the time of such adjournment to approve the Merger Proposal or (2) to allow reasonable additional time for the filing and mailing of any required supplement or amendment to this proxy statement/prospectus, and the review of such materials by ChampionX stockholders, requires the affirmative vote of the holders of a majority of the voting power of ChampionX common stock present online or represented by proxy and entitled to vote on such matter at the ChampionX Special Meeting, whether or not a quorum is present. No notice of the adjourned ChampionX Special Meeting will be given so long as the time and place, and the means of remote communication, if any, by which ChampionX stockholders and proxy holders may be deemed to be present in person and vote at such adjourned meeting are (1) announced at the ChampionX Special Meeting at which the adjournment is taken, (2) displayed, during the time scheduled for the ChampionX Special Meeting, on the same electronic network used to enable ChampionX stockholders and proxy holders to participate in the meeting by means of remote communication or (3) set forth in the notice of the ChampionX Special Meeting. At any such adjourned ChampionX Special Meeting which a quorum is present, ChampionX may transact any business which might have been transacted at the original ChampionX Special Meeting. If the adjournment is for more than 30 days or a new record date is fixed for the adjourned meeting, a notice of the adjourned meeting shall be given to each ChampionX stockholder of record entitled to vote at such meeting.

In addition, at any time prior to convening the ChampionX Special Meeting, the ChampionX Special Meeting may be postponed without the approval of ChampionX stockholders. If postponed, ChampionX will publicly announce the new meeting date. Similar to adjournments, any postponement of the ChampionX Special Meeting for the purpose of soliciting additional proxies will allow ChampionX stockholders who have already sent in their proxies to revoke them at any time prior to their use.

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Solicitation of Proxies

ChampionX is soliciting the enclosed proxy card on behalf of the ChampionX Board. In addition to solicitation by mail, ChampionX and its directors, officers and employees may solicit proxies in person, by telephone or by electronic means. These persons will not be specifically compensated for doing this.

ChampionX has retained D.F. King to assist in the solicitation process. ChampionX will pay D.F. King a fee of approximately $15,000, plus an additional fixed fee for each ChampionX stockholder contacted, and will reimburse D.F. King for reasonable out-of-pocket expenses.

ChampionX will ask banks, brokers, trusts and other nominees to forward ChampionX’s proxy solicitation materials to the beneficial owners of shares of ChampionX common stock held of record by such banks, brokers, trusts or other nominees. ChampionX will reimburse these banks, brokers, trusts or other nominees for their customary clerical and mailing expenses incurred in forwarding the proxy solicitation materials to the beneficial owners.

Questions and Additional Information

If you have any questions about how to vote or direct a vote in respect of your shares of ChampionX common stock, you may contact ChampionX’s proxy solicitor, D.F. King, toll-free from the U.S. or Canada at (866) 416-0577, or dial direct from other locations at +1 (212) 269-5550.

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PROPOSAL 1: THE MERGER PROPOSAL

The Merger Proposal

ChampionX is requesting that ChampionX stockholders adopt the Merger Agreement. For a detailed discussion of the terms of the Merger Agreement and the Transactions, including the Merger, see the section entitled “The Merger Agreement.” As discussed in the section entitled “The Merger—ChampionX’s Reasons for the Merger; Recommendation of the ChampionX Board of Directors,” after careful consideration, the ChampionX Board unanimously (i) determined the Merger Agreement and the consummation of the Merger and the Transactions, to be fair to and in the best interests of ChampionX and its stockholders, (ii) declared the Merger Agreement and the consummation of the Transactions, including the Merger, to be advisable, (iii) authorized and approved the Merger Agreement, including the execution, delivery and performance thereof, (iv) directed that the Merger Agreement be submitted to the ChampionX stockholders for their consideration and adoption and (v) recommended the ChampionX stockholders adopt the Merger Agreement.

Approval of the Merger Proposal is a condition to the completion of the Merger. If the Merger Proposal is not approved, the Merger will not be consummated. For a detailed discussion of the terms and conditions of the Merger, see the section entitled “The Merger Agreement—Conditions to the Merger.”

Vote Required for Approval

Approval of the Merger Proposal requires, assuming a quorum is present, the affirmative vote of the holders of a majority of the outstanding shares of ChampionX common stock entitled to vote at the ChampionX Special Meeting. Abstentions, a broker non-vote or a failure to vote will have the same effect as a vote “AGAINST” the Merger Proposal.

Recommendation of the ChampionX Board

THE CHAMPIONX BOARD UNANIMOUSLY RECOMMENDS THAT THE CHAMPIONX STOCKHOLDERS VOTE “FOR” THE MERGER PROPOSAL.

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PROPOSAL 2: THE COMPENSATION PROPOSAL

The Compensation Proposal

Pursuant to Section 14A of the Exchange Act and Rule 14a-21(c) thereunder, ChampionX is requesting the ChampionX stockholders approve, by a non-binding, advisory vote, the compensation that may be received by ChampionX’s named executive officers in connection with the Merger as disclosed in the section entitled “The Merger—Interests of ChampionX’s Directors and Executive Officers in the Merger” including the footnotes, tables and associated narrative discussion.

The ChampionX Board unanimously recommends that ChampionX stockholders approve the following resolution:

“RESOLVED, that the compensation that may be paid or become payable to ChampionX’s named executive officers that is based on or otherwise relates to the Merger, as disclosed pursuant to Item 402(t) of Regulation S-K in the table in the section of the proxy statement/prospectus entitled “The Merger—Interests of ChampionX’s Directors and Executive Officers in the Merger,” including the associated footnotes, tables and narrative discussion and the agreements and plans pursuant to which such compensation may be paid or become payable, are hereby APPROVED on an advisory basis.”

Vote Required for Approval

The Compensation Proposal is a vote separate and apart from the vote to adopt the Merger Agreement, and approval of the Compensation Proposal is not a condition to the completion of the Merger. Accordingly, you may vote to approve the Compensation Proposal and vote not to adopt the Merger Agreement and vice versa. Because the vote is advisory in nature only, it will not be binding on ChampionX. Accordingly, to the extent that ChampionX is contractually obligated to pay the compensation, the compensation will be payable to the named executive officers, subject only to the conditions applicable thereto, if the Merger Agreement is adopted and the Merger consummated, regardless of the outcome of the Compensation Proposal.

Approval of the Compensation Proposal requires, assuming a quorum is present, affirmative vote of the holders of a majority of the voting power of ChampionX common stock present online or represented by proxy and entitled to vote on such matter at the ChampionX Special Meeting. Abstentions will have the same effect as a vote “AGAINST” the Compensation Proposal. Broker non-votes and failure of any ChampionX stockholder to submit a vote (e.g., by not submitting a proxy or not voting online) will have no effect on the Compensation Proposal.

Recommendation of the ChampionX Board

THE CHAMPIONX BOARD UNANIMOUSLY RECOMMENDS THAT THE CHAMPIONX STOCKHOLDERS VOTE, ON AN ADVISORY BASIS, “FOR” THE APPROVAL OF THE COMPENSATION PROPOSAL.

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PROPOSAL 3: THE ADJOURNMENT PROPOSAL

The Adjournment Proposal

ChampionX is requesting that ChampionX stockholders approve the adjournment of the ChampionX Special Meeting, if necessary, (1) to solicit additional proxies in favor of the Merger Proposal if (a) there are holders of an insufficient number of shares of ChampionX common stock present online or represented by proxy and entitled to vote at the ChampionX Special Meeting to constitute a quorum at such meeting or (b) there are insufficient votes at the time of such adjournment to approve the Merger Proposal or (2) to allow reasonable additional time for the filing and mailing of any required supplement or amendment to this proxy statement/prospectus, and the review of such materials by ChampionX stockholders.

If, at the ChampionX Special Meeting, (i) the number of shares of ChampionX common stock represented and voting in favor of the Merger Proposal is insufficient to approve such proposal, (ii) there are an insufficient number of shares of ChampionX common stock present online or represented by proxy and entitled to vote at the ChampionX Special Meeting to constitute a quorum or (iii) ChampionX determines that it is necessary to adjourn the meeting to allow reasonable additional time for the filing and mailing of any required supplement or amendment to this proxy statement/prospectus, and the review of such materials by ChampionX stockholders, ChampionX may move to adjourn the ChampionX Special Meeting in order to enable the ChampionX Board to solicit additional proxies to obtain a quorum or for approval of the Merger Proposal.

Vote Required for Approval

Approval of the Adjournment Proposal requires, whether or not a quorum is present, the affirmative vote of the holders of a majority of the voting power of ChampionX common stock present online or represented by proxy and entitled to vote on such matter at the ChampionX Special Meeting. Abstentions will have the same effect as a vote “AGAINST” the Adjournment Proposal. Broker non-votes and failure of any ChampionX stockholders to submit a vote (e.g., by not submitting a proxy or not voting online) will have no effect on the Adjournment Proposal.

Recommendation of the ChampionX Board

THE CHAMPIONX BOARD UNANIMOUSLY RECOMMENDS THAT THE CHAMPIONX STOCKHOLDERS VOTE “FOR” THE ADJOURNMENT PROPOSAL.

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THE MERGER

Structure of the Merger

Pursuant to the Merger Agreement, at the Effective Time, Merger Sub will merge with and into ChampionX, in accordance with the requirements of Delaware law, whereupon the separate existence of Merger Sub will cease and ChampionX will continue as the Surviving Corporation in the Merger as an indirect wholly owned subsidiary of SLB. Following the Merger, shares of ChampionX common stock will be delisted from Nasdaq, will be deregistered under the Exchange Act and will cease to be publicly traded.

Background of the Merger

As part of the ongoing review of ChampionX’s business, the ChampionX Board and management team regularly evaluate ChampionX’s historical performance, future growth prospects and overall strategic objectives to achieve its long-term strategic, operational and financial goals and enhance stockholder value. The topics of these conversations have included, among other things, developments in the oil and gas industry, generally, including recent M&A activity and investor focus within the industry on consistent return of capital and lower cost of capital, as well as ChampionX’s position in the industry. The ChampionX Board has, in connection with such reviews, evaluated ChampionX’s business plan and considerations associated with continuing to execute on the business plan. At the direction of the ChampionX Board, such reviews have also included periodic updates from ChampionX’s management and its advisors regarding the general landscape of mergers and acquisitions and other strategic transactions and the likelihood and risks associated with such transactions. In addition, from time-to-time Mr. Sivasankaran Somasundaram, the President and Chief Executive Officer of ChampionX, has engaged in informal conversations about potential strategic transactions involving ChampionX with senior executives of other companies in the industry. The ChampionX Board was provided with regular updates regarding these interactions during their meetings.

During August 2023, the Chief Executive Officer of Party A, a company in the oil and gas industry, and an acquaintance of Mr. Somasundaram, met with Mr. Somasundaram in Houston, Texas. During this meeting, the Chief Executive Officer of Party A indicated that Party A was preparing for an upcoming strategy review, and raised the possibility of a potential business combination transaction involving Party A and ChampionX. The Chief Executive Officer of Party A had previously raised the possibility of a potential business combination transaction involving Party A and ChampionX to Mr. Somasundaram in passing, but no transaction terms had ever been discussed. Mr. Somasundaram told the Chief Executive Officer of Party A that he would discuss with the ChampionX Board and promptly informed the ChampionX Board of the contact with Party A. The ChampionX Board expressed support for engaging in preliminary discussions with Party A in respect of a potential transaction, and ChampionX’s management and its advisors subsequently considered the potential terms of a transaction involving Party A.

On November 12, 2023, ChampionX and Party A executed a confidentiality agreement, which included customary limitations regarding the use and disclosure of ChampionX’s confidential information and customary standstill obligations applicable to Party A that terminated automatically upon the entry by ChampionX into a definitive agreement with respect to a business combination transaction with another party.

On November 15, 2023, the Chief Executive Officer of Party B, a company in the oil and gas industry, and Mr. Somasundaram met in Houston, Texas. At the meeting, the Chief Executive Officer of Party B expressed an interest in exploring a potential business combination transaction involving Party B and ChampionX and discussed with Mr. Somasundaram the strategic rationale of such transaction from Party B’s perspective. Mr. Somasundaram told the Chief Executive Officer of Party B that he would discuss with the ChampionX Board and promptly informed the ChampionX Board of the contact with Party B.

On November 29, 2023, Mr. Olivier Le Peuch, Chief Executive Officer of SLB, who had met Mr. Somasundaram at the airport in early October 2023 and with whom Mr. Somasundaram had exchanged

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business cards, contacted Mr. Somasundaram to request a meeting, but did not indicate the purpose of the meeting. The meeting was scheduled for December 8, 2023.

During December 2023, ChampionX and Party A held periodic discussions on preliminary principal terms in respect of a potential transaction involving ChampionX and Party A, including the fact that Party A did not think such a transaction would involve a meaningful premium for ChampionX stockholders and ChampionX’s belief that such a transaction should involve a meaningful premium for its stockholders.

On December 8, 2023, Mr. Le Peuch and Mr. Somasundaram met in Houston, Texas. During the course of their discussion, Mr. Le Peuch discussed with Mr. Somasundaram the possibility of exploring a potential transaction involving ChampionX and SLB. Mr. Le Peuch discussed with Mr. Somasundaram the strategic benefits and synergies of a potential transaction from SLB’s perspective, including SLB’s interest in increasing its presence in the production chemicals space and artificial lift business. Mr. Le Peuch also noted SLB’s appreciation of ChampionX’s success in growing its business in North America. No specific transaction terms were discussed, but Mr. Le Peuch indicated that if ChampionX were interested, SLB would work to prepare a proposal. Mr. Somasundaram indicated to Mr. Le Peuch that he would discuss potential next steps with the ChampionX Board.

Later on December 8, 2023, the ChampionX Board held a meeting by videoconference to discuss the ongoing conversations with Party A, which was attended by members of ChampionX senior management and representatives of Centerview, with whom ChampionX management and the ChampionX Board regularly consulted. At the meeting, the ChampionX Board considered the discussions with Party A, including Party A’s position that any potential transaction involving Party A and ChampionX would not involve a meaningful premium for ChampionX stockholders, as well as the ChampionX Board’s position that any such potential transaction should deliver a meaningful premium to ChampionX stockholders, and potential proposed terms for progressing discussions with Party A. During the meeting, Mr. Somasundaram also discussed with the ChampionX Board his December 8th meeting with Mr. Le Peuch. Following discussion and deliberation, the ChampionX Board indicated it would be willing to consider the terms of a proposal from SLB, as well as its continued belief that a transaction involving Party A should involve a meaningful premium to ChampionX stockholders. Following such discussion, Mr. Somasundaram indicated to Mr. Le Peuch that the ChampionX Board would be willing to consider the terms of a proposal with respect to a possible transaction involving SLB.

On December 20, 2023, Mr. Somasundaram requested a call with Mr. Le Peuch, which was held on December 21, 2023. During the call, Mr. Somasundaram asked Mr. Le Peuch whether SLB intended to submit an offer for a proposed business combination transaction involving ChampionX and, if so, on what terms. Mr. Le Peuch indicated that SLB was continuing to evaluate proposed terms for a potential transaction involving ChampionX, and no specific transaction terms were discussed during this time.

On December 31, 2023, consistent with Mr. Somasundaram’s discussions with the ChampionX Board, Mr. Somasundaram verbally proposed to Party A terms for a potential transaction involving ChampionX and Party A whereby ChampionX stockholders would receive 49.9% of the equity interests in the combined company and equityholders of Party A would retain 50.1% of the equity interests in the combined company. Shortly thereafter, the Chair of the board of directors of Party A contacted Mr. Dan Rabun, Chair of the ChampionX Board, to convey, among other things, that such terms would not be acceptable to Party A, and Party A would not proceed with a transaction involving a meaningful premium to ChampionX stockholders. Following such feedback, ChampionX and Party A ceased discussions on a potential transaction involving ChampionX and Party A.

On January 2, 2024, Mr. Le Peuch contacted Mr. Somasundaram to request the contact information of Mr. Rabun, as Mr. Jim Hackett, Chair of the SLB Board, wished to speak with him.

On January 3, 2024, Mr. Hackett contacted Mr. Rabun to affirm SLB’s interest in a potential transaction with ChampionX. Mr. Hackett indicated that SLB had heard rumors of a potential transaction involving ChampionX.

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Mr. Rabun noted that the ChampionX Board would be willing to consider a proposal from SLB, but any such proposal would need to deliver a meaningful premium to ChampionX stockholders in light of the business plan and prospects of ChampionX. On January 8, 2024, Mr. Hackett again contacted Mr. Rabun to indicate that the SLB Board would be meeting to discuss a potential proposal in the coming weeks. Mr. Rabun and Mr. Hackett discussed, among other things, the type of consideration to ChampionX shareholders (stock, cash or a combination of both). Mr. Rabun reiterated ChampionX’s position that any proposal would need to deliver a meaningful premium to ChampionX stockholders.

On January 18, 2024, the SLB Board held a meeting by videoconference, which was attended by members of SLB senior management. At the meeting, the SLB Board discussed and considered a potential transaction involving ChampionX, including the strategic rationale for the transaction and potential synergies. Mr. Le Peuch provided the SLB Board with a summary of his preliminary discussions with Mr. Somasundaram and advised the SLB Board that the next step would be for SLB to provide ChampionX with a non-binding letter of intent expressing SLB’s desire to acquire ChampionX in an all-stock transaction. On January 19, 2024, Mr. Le Peuch contacted Mr. Somasundaram to request a meeting, which was scheduled for January 22, 2024.

On January 22, 2024, Mr. Le Peuch met with Mr. Somasundaram in Houston, Texas to inform him that SLB was preparing to submit a proposal for SLB to acquire all of the issued and outstanding shares of ChampionX common stock in an all-stock transaction. Mr. Le Peuch did not provide Mr. Somasundaram with any indication of the valuation or offer price that would be reflected in the proposal during the meeting. Mr. Somasundaram inquired whether SLB would be proposing cash consideration to ChampionX stockholders in light of the relative size of the two companies, and indicated to Mr. Le Peuch that any proposal would need to deliver a meaningful premium to ChampionX stockholders in light of the business plan and prospects of ChampionX. Mr. Le Peuch pointed out that many transactions in the oil and gas services industry do not involve a meaningful premium, and did not discuss the form of consideration that might be included in a proposal.

On January 23 and 24, 2024, the SLB Board held a series of meetings by videoconference, which were attended by members of SLB senior management. At the meetings, the SLB Board reviewed certain materials that had been provided in advance of the meetings and prepared by members of SLB senior management and Goldman Sachs & Co. LLC (“Goldman Sachs”), financial advisor to SLB, with respect to a potential transaction involving ChampionX, including materials addressing the strategic rationale and potential synergies and a preliminary financial analysis of the proposed transaction, as well as the potential cost of the transaction. Mr. Le Peuch provided the SLB Board with a summary of his January 22 discussion with Mr. Somasundaram, including that Mr. Somasundaram had inquired as to whether SLB would consider an all-cash proposal. The SLB Board then discussed a range of potential transaction structures and related tax implications with respect to the proposed transaction. Following discussion with SLB’s management, the SLB Board determined to continue to discuss proposed terms for a transaction involving ChampionX.

On January 26, 2024, Mr. Le Peuch contacted Mr. Somasundaram to indicate that SLB was preparing to submit a proposal in respect of a potential transaction involving ChampionX, and may do so in the coming weeks.

On February 22, 2024, the SLB Board held a meeting by videoconference, which was attended by members of SLB senior management. At the meeting, the SLB Board discussed the strategic rationale for the transaction and potential synergies and a preliminary financial analysis of the proposed transaction, as well as the potential costs of the transaction. Following such discussion, the SLB Board authorized SLB management to make a non-binding proposal to acquire ChampionX in an all-stock transaction. On February 23, 2024, Mr. Le Peuch contacted Mr. Somasundaram to request a meeting, which was scheduled for February 29, 2024.

On February 29, 2024, Mr. Le Peuch met with Mr. Somasundaram in Houston, Texas and provided Mr. Somasundaram with a letter setting forth a non-binding proposal for SLB to acquire all of the issued and outstanding shares of ChampionX common stock in an all-stock transaction in which holders of ChampionX common stock would receive $36.70 for each share of ChampionX common stock (the “February 29 SLB

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Proposal”), payable in shares of SLB common stock. The February 29 SLB Proposal indicated, among other things, that SLB would be prepared to execute definitive documentation and announce a transaction in approximately 4 to 6 weeks, but did not include a proposed exchange ratio with respect to the contemplated stock consideration to be issued in the transaction. Promptly following receipt, Mr. Somasundaram shared the February 29 SLB Proposal with the ChampionX Board and ChampionX’s advisors.

Also on February 29, 2024, Mr. Somasundaram met with the Chief Executive Officer of Party B for a follow-up informal conversation about a potential strategic transaction involving ChampionX and Party B. During the meeting, Mr. Somasundaram conveyed that the potential transaction did not offer compelling strategic merits because the two companies did not have complementary businesses or offerings, there was no compelling strategic or market-based rationale for the potential transaction, and as a result a potential transaction involving Party B would not present an attractive opportunity to ChampionX stockholders. No further discussions were had between ChampionX and Party B.

On March 1, 2024, an update call was held with the ChampionX Board, members of ChampionX senior management and representatives of Centerview and Weil, Gotshal & Manges LLP (“Weil”), legal counsel to ChampionX, to discuss the terms of the February 29 SLB Proposal. The ChampionX Board discussed its preliminary views on the February 29 SLB Proposal and determined to discuss the proposal further at the upcoming previously scheduled ChampionX Board meeting.

On March 5, 2024, the ChampionX Board held a meeting by videoconference, which was attended by members of ChampionX senior management and representatives of Centerview and Weil. At the meeting, the ChampionX Board discussed the February 29 SLB Proposal, including the proposal that holders of ChampionX common stock would receive $36.70 for each share of Champion X common stock, payable in shares of SLB common stock, and the fact that such consideration implied an exchange ratio of 0.759 shares of SLB common stock for each share of ChampionX common stock based on the closing price of SLB common stock as of February 29, 2024. Representatives of Centerview discussed with the ChampionX Board the stock price performance of SLB and ChampionX over the prior three-year period and their stock price performance relative to one another, as well as certain preliminary financial valuation analyses in connection with the February 29 SLB Proposal. The ChampionX Board discussed and considered the valuation of ChampionX implied by the February 29 SLB Proposal, the value of the SLB common stock proposed to be issued as consideration in the potential transaction, the strategic benefits of a potential transaction, including potential synergies from the two businesses, as well as the risks associated with a potential transaction, including as compared to other potential transaction counterparties and ChampionX’s ability to continue to execute its strategic plan. The ChampionX Board also discussed with ChampionX management and its advisors the mechanics of an all-stock transaction and the potential timetable in respect of closing a potential transaction. Following discussion and deliberation, the ChampionX Board expressed their support for engaging in preliminary discussions regarding a potential all-stock transaction with SLB, subject to SLB increasing the proposed price for each share, as the ChampionX Board believed the $36.70 offer did not represent sufficient value to holders of ChampionX common stock. The ChampionX Board authorized Mr. Somasundaram to respond to SLB, requesting an increase in price to $38.50 for each share of ChampionX common stock, in order for the companies to engage in further discussions. The ChampionX Board also authorized ChampionX senior management to engage Centerview, subject to receipt of information with respect to any potential conflicts of interest that Centerview may have with respect to a potential transaction involving SLB and negotiation of acceptable fees and other terms. The ChampionX Board determined it was appropriate to retain Centerview as ChampionX’s financial advisor based upon Centerview’s reputation, qualification, experience in mergers and acquisition, financial analyses and capital markets and their familiarity with ChampionX.

On March 6, 2024, Centerview delivered to ChampionX senior management a summary of potential relationships with SLB that the ChampionX Board should consider prior to engaging Centerview to assist the ChampionX Board with respect to the potential transaction with SLB, which was subsequently shared with the ChampionX Board. The summary confirmed, among other things, that, since January 1, 2022, Centerview had not been

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engaged to perform financial advisory work for SLB or received any fees from SLB or any of its subsidiaries. Thereafter, Centerview and ChampionX worked to formalize the terms of Centerview’s engagement under a formal engagement letter, which was executed on April 1, 2024.

On March 7, 2024, Mr. Somasundaram contacted Mr. Le Peuch to provide him with the feedback from the ChampionX Board on the February 29 SLB Proposal. During that discussion, Mr. Somasundaram indicated to Mr. Le Peuch that the ChampionX Board would be willing to engage in further discussions if SLB would increase the offer price to $38.50 for each share of ChampionX common stock, payable in shares of SLB common stock.

Later on March 7, 2024, Mr. Le Peuch, on behalf of SLB, sent Mr. Somasundaram an updated written non-binding proposal for SLB to acquire all of the issued and outstanding shares of ChampionX common stock for $37.80 per share of Champion X common stock (the “March 7 SLB Proposal”), payable in shares of SLB common stock. The March 7 SLB Proposal also indicated, among other things, that SLB expected to be able to complete due diligence within approximately 20 business days following March 12, 2024, and proposed that the parties agree to a 30-day mutual exclusivity period and enter into a mutually acceptable confidentiality agreement. Promptly following receipt, Mr. Somasundaram shared the March 7 SLB Proposal with the ChampionX Board and ChampionX’s advisors.

Later on March 7, 2024, ChampionX senior management and representatives of Centerview updated the ChampionX Board on the March 7 SLB Proposal. After discussion regarding the March 7 SLB Proposal, including the fact that such consideration implied an exchange ratio of 0.744 shares of SLB common stock for each share of ChampionX common stock based on the closing price of SLB common stock as of March 7, 2024, the ChampionX Board considered the revised offer price and expressed their support for moving forward with preliminary discussions with SLB and entering into a confidentiality agreement with SLB in order to enable SLB, as well as ChampionX, to conduct due diligence on each other’s businesses, and to enable the parties to discuss potential transaction terms.

On March 8, 2024, Mr. Somasundaram communicated to Mr. Le Peuch that ChampionX was interested in proceeding with preliminary discussions regarding a potential transaction with SLB and in entering into a mutually acceptable confidentiality agreement, but that ChampionX would not agree to a mutual exclusivity period. Mr. Le Peuch confirmed to Mr. Somasundaram that SLB was interested in proceeding with due diligence and discussions regarding a potential transaction involving the companies. Mr. Le Peuch also indicated that SLB was willing to forego SLB’s request that the parties agree to a mutual exclusivity period, but requested via email to Mr. Somasundaram on March 8, 2023 that, for purposes of expediting diligence and ensuring that ChampionX management and its advisors were focused on the potential transaction, ChampionX not pursue any active search of alternative offers while the diligence efforts were underway. Also on March 8, 2023, Mr. Somasundaram acknowledged receipt of Mr. Le Peuch’s email and confirmed ChampionX’s agreement on the path forward.

Later on March 8, 2024, ChampionX and SLB executed a confidentiality agreement, which did not include standstill restrictions applicable to SLB. Following execution of the confidentiality agreement, each of ChampionX and SLB conducted diligence on the other party, which continued until execution of the Merger Agreement, including through various meetings covering financial, operational, legal and regulatory, accounting and tax diligence on March 13, 14, 15, 18, 19, 20, 21, 22, 25 and 26, 2024.

On March 12, 2024, Saurabh Nitin, Senior Vice President, Corporate Strategy, Development and Energy Transition of ChampionX, and Vijay Kasibhatla, Director, Mergers and Acquisitions of SLB, met in Houston, Texas to discuss SLB’s and ChampionX’s respective approaches to, and commencement of, diligence, as well as potential synergies that could be generated as a result of the potential transaction. No specific transaction terms were discussed during this meeting.

On March 13, 2024, representatives of ChampionX and SLB each held management presentations on their respective businesses, which were attended by representatives of Centerview, Goldman Sachs, and Latham &

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Watkins LLP (“Latham”), legal advisor to SLB. No specific transaction terms were discussed during this meeting.

On March 15, 2024, the ChampionX Board held a meeting by videoconference, which was attended by members of ChampionX senior management and representatives of Centerview and Weil. At the meeting, the ChampionX Board discussed and considered the potential transaction with SLB, including the strategic rationale for the transaction and potential synergies, and received an update from ChampionX management and Centerview on how both companies’ due diligence of the other was progressing and other transaction work streams. The ChampionX Board discussed with ChampionX’s senior management and the company’s advisors the fact that the share price of both companies’ stock had continued to increase since the March 7 SLB Proposal and the impact of such movement on the ChampionX share price implied by the March 7 SLB Proposal. The ChampionX Board also acknowledged that the parties would need to discuss and align on a final exchange ratio and directed ChampionX’s senior management to continue to work with ChampionX’s advisors to finalize due diligence and progress transaction documentation in parallel.

On March 18, 2024, representatives of ChampionX management and SLB management met to discuss the potential synergies that could be generated as a result of the potential transaction. No specific transaction terms were discussed during this meeting.

Also on March 18, 2024, Latham sent Weil a draft merger agreement, which, among other things, (i) included a regulatory cooperation covenant that limited SLB’s obligation to agree to potential remedies to those that would not result in a loss of more than 5% of ChampionX’s aggregate annual 2023 revenues, (ii) did not include a regulatory reverse termination fee to be paid by SLB if the merger agreement was terminated for circumstances relating to the failure to obtain regulatory approvals or in the event of a legal restraint prohibiting the transaction, (iii) did not include a provision that would permit ChampionX to terminate the merger agreement in order to accept a “superior proposal,” (iv) included a provision that if the ChampionX Board changed its recommendation with respect to the SLB transaction, SLB could require ChampionX to allow the ChampionX shareholders to decide whether to support the transaction at a special meeting of the ChampionX shareholders (the “stockholder vote provision”) and (v) included a termination fee equal to 5% of the ChampionX equity value implied by the transaction to be paid by ChampionX if the merger agreement was terminated in the event that the ChampionX Board changed its recommendation or in certain cases where ChampionX consummated an alternative transaction.

On March 22, 2024, the ChampionX Board held a meeting by videoconference, which was attended by members of ChampionX senior management and representatives of Centerview and Weil. At the meeting, the ChampionX Board received an update on the synergy discussions with SLB earlier that week, the diligence process to date and an overview of key terms proposed by the draft merger agreement, including those related to regulatory matters and the stockholder vote provision. The ChampionX Board also discussed the terms of the March 7 SLB Proposal, including the fact that the offer price of $37.80 for each share of ChampionX common stock would need to be expressed as an exchange ratio pursuant to which each share of ChampionX common stock would convert into shares of SLB common stock. The ChampionX Board considered the potential implied exchange ratio based upon the closing trading price and volume weighted average trading price over different time periods of shares of SLB common stock. The ChampionX Board noted that the March 7 SLB Proposal had implied an exchange ratio of 0.744 based upon the closing trading price of SLB common stock as of March 7, 2024. The ChampionX Board expressed its continued support in respect of continuing discussions on the potential transaction with SLB and authorized Mr. Somasundaram to discuss an exchange ratio of 0.744 with Mr. Le Peuch, with the understanding that there likely would be further negotiation on the exchange ratio.

On March 24, 2024, Mr. Somasundaram contacted Mr. Le Peuch to discuss the proposed exchange ratio with respect to the transaction. During that discussion, Mr. Somasundaram indicated that consideration of $37.80 for each share of ChampionX common stock, payable in shares of SLB common stock, as proposed by the March 7 SLB Proposal implied an exchange ratio of 0.744 based upon the closing trading price of SLB common stock as

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of March 7, 2024. Mr. Somasundaram therefore proposed to Mr. Le Peuch an exchange ratio of 0.744 for the potential transaction. Mr. Le Peuch indicated to Mr. Somasundaram that this exchange ratio would not have the support of the SLB Board, but that SLB would continue to negotiate toward mutually agreeable transaction terms.

On March 24, 2024, Weil sent a revised draft merger agreement to Latham, which, among other things, (i) included a regulatory cooperation covenant that limited SLB’s obligation to agree to potential remedies to those that that would not reasonably be expected to be material to ChampionX and its subsidiaries, taken as a whole, (ii) proposed a regulatory reverse termination fee that would be payable by SLB equal to 7% of ChampionX’s equity value implied by the transaction, (iii) rejected the proposed stockholder vote provision, (iv) included a provision that would enable ChampionX to terminate the merger agreement to accept a “superior proposal” (the “superior proposal termination right”) and (v) proposed the termination fee that would be payable by ChampionX be equal to 2.5% of ChampionX’s equity value implied by the transaction.

On March 26, 2024, Latham sent a revised draft merger agreement to Weil, which, among other things, (i) included a regulatory cooperation covenant that limited SLB’s obligation to agree to potential remedies to those that would not result in a loss of more than 6.75% of ChampionX’s aggregate annual 2023 revenues, (ii) removed the proposed regulatory reverse termination fee that would be payable by SLB, (iii) reinserted the stockholder vote provision, (iv) removed the proposed superior proposal termination right and (v) proposed the termination fee that would be payable by ChampionX be equal to 4.25% of ChampionX’s equity value implied by the transaction.

On March 26, 2024, Mr. Nitin sent Mr. Kasibhatla an email emphasizing ChampionX’s position that the exchange ratio for the proposed transaction should equal 0.744 shares as conveyed by Mr. Somasundaram to Mr. Le Peuch on March 24, 2024, and further describing ChampionX’s rationale for its position.

On March 27, 2024, Mr. Kasibhatla, Ms. Dianne Ralston, Chief Legal Officer and Secretary of SLB, other members of SLB management, representatives of Latham, Ms. Julia Wright, Senior Vice President, General Counsel and Secretary of ChampionX, and representatives of Weil held a meeting by videoconference to discuss certain open points on the draft merger agreement, including, among others, the regulatory cooperation covenant, the regulatory reverse termination fee, the stockholder vote provision, the superior proposal termination right and the termination fee.

Following such discussion, later on March 27, 2024, Weil sent a revised draft merger agreement to Latham, which, among other things, (i) included a regulatory cooperation covenant that limited SLB’s obligation to agree to potential remedies to those that would not result in a loss of more than 15% of ChampionX’s aggregate annual 2023 revenues, (ii) reinserted a regulatory reverse termination fee what would be payable by SLB equal to 6.50% of ChampionX’s equity value implied by the transaction, (iii) proposed the termination fee that would be payable by ChampionX be equal to 3% of ChampionX’s equity value implied by the transaction, (iv) rejected the stockholder vote provision and (v) included the superior proposal termination right. Also on March 27, 2024, Weil sent to Latham an initial draft of the ChampionX disclosure schedules to the merger agreement.

Later on March 27, 2024, Mr. Le Peuch met with Mr. Somasundaram in Houston, Texas to convey that SLB was proposing an exchange ratio for the transaction of 0.72 shares of SLB common stock for each share of ChampionX common stock. During that discussion, Mr. Somasundaram noted that such exchange ratio would not provide sufficient value for ChampionX stockholders, particularly given the increases in both companies’ share prices since March 7, 2024, and suggested that a special cash dividend to be paid by ChampionX to its stockholders prior to the closing of the potential transaction may address the perceived gap in value. Mr. Le Peuch indicated that SLB would consider the exchange ratio, as well as the potential cash dividend.

On March 28, 2024, the SLB Board held a meeting by videoconference, which was attended by members of SLB senior management. At the meeting, SLB management provided the SLB Board with an update on recent

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discussions between SLB and ChampionX and discussed key terms that were subject to continuing negotiation in the merger agreement, including, among others, the inclusion of the stockholder vote provision, the amount and triggers to payment of termination fees payable by each of ChampionX and SLB, and certain employment-related matters. The SLB Board authorized SLB management to continue to negotiate a transaction with ChampionX within certain price parameters agreed during the meeting.

Also on March 28, 2024, the ChampionX Board held a meeting by videoconference, which was attended by members of ChampionX senior management and representatives of Centerview and Weil. At the meeting, the ChampionX Board discussed the potential benefits and synergies of the transaction based on diligence findings and received updates on legal and other diligence findings to date, key terms of and open points in the draft merger agreement and other transaction work streams. The ChampionX Board also discussed with ChampionX’s senior management and the company’s advisors the prior day’s discussion between Mr. Somasundaram and Mr. Le Peuch, the recent share prices of SLB and ChampionX, the range of potential exchange ratios that could be applicable in the potential transaction, and what these exchange ratios implied in terms of value to holders of ChampionX common stock, as well as ways to address the gap in valuation between the parties, including with a special cash dividend to be paid to ChampionX stockholders. Following discussion and deliberation, the ChampionX Board expressed its support in respect of continuing discussions on the potential transaction with SLB, with the understanding that SLB would be reverting with a proposal on the exchange ratio.

On March 29, 2024, Mr. Le Peuch contacted Mr. Somasundaram to inform him that SLB would be sending Mr. Somasundaram a revised written non-binding proposal (the “March 29 SLB Proposal”). Thereafter, Mr. Le Peuch sent a letter to Mr. Somasundaram setting forth the March 29 SLB Proposal, which proposed (i) an exchange ratio of 0.73 shares of SLB common stock for each share of ChampionX common stock, (ii) a regulatory cooperation covenant that limited SLB’s obligation to agree to potential remedies to those that would not result in a loss of more than 8% of ChampionX’s aggregate annual 2023 revenues, (iii) a regulatory reverse termination fee that would be payable by SLB equal to 3.25% of ChampionX’s enterprise value implied by the transaction, (iv) a termination fee that would be payable by ChampionX equal to 3.25% of ChampionX’s enterprise value implied by the transaction, (v) the stockholder vote provision and (vi) no special cash dividends. Promptly following receipt, Mr. Somasundaram shared the March 29 SLB Proposal with the ChampionX Board and the company’s advisors.

Also on March 29, 2024, Latham sent to Weil a revised draft merger agreement that reflected terms consistent with those in the March 29 SLB Proposal and an initial draft of the SLB disclosure schedules.

Also on March 29, 2024, and following receipt of the March 29 SLB Proposal, the ChampionX Board held a meeting by videoconference, which was attended by members of ChampionX senior management and representatives of Centerview and Weil, to discuss the terms of the March 29 SLB proposal. Representatives of Centerview reviewed with the ChampionX Board Centerview’s preliminary financial analyses of the proposed exchange ratio of 0.73 shares of SLB common stock for each share of ChampionX common stock. The ChampionX Board discussed the illustrative value contemplated by the March 29 SLB Proposal, as well as how it compared to ChampionX’s proposal of an exchange ratio of 0.744 shares of SLB common stock for each share of ChampionX common stock, and ways to address the gap in value, including the possibility of paying a special cash dividend to ChampionX stockholders and how much cash would be needed to support such a proposal. The ChampionX Board also discussed and considered the other terms included in the March 29 SLB Proposal, including with respect to regulatory matters, contractual rights to pursue alternative transactions and transaction certainty, including the fact that they did not believe that a termination fee of 3.25% of ChampionX’s enterprise value implied by the terms of the transaction, nor the stockholder vote provision, would preclude any other potential acquirer from making a proposal to acquire ChampionX following the announcement of the potential transaction, if such a potential acquirer wanted to do so. Following deliberation, the ChampionX Board directed Mr. Somasundaram to prepare a written proposal to SLB setting forth the terms discussed with the ChampionX Board.

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Later on March 29, 2024, Mr. Somasundaram contacted Mr. Le Peuch to inform him that ChampionX would be sending a written response to SLB’s latest proposal (the “March 29 ChampionX Proposal”) and, thereafter, sent Mr. Le Peuch the March 29 ChampionX Proposal. The March 29 ChampionX Proposal proposed (i) an exchange ratio of 0.73 shares of SLB common stock for each share of ChampionX common stock, and the ability of the ChampionX Board to declare and to pay a special cash dividend of $0.60 for each share of ChampionX common stock prior to the closing of the potential transaction, (ii) a regulatory cooperation covenant that limited SLB’s obligation to agree to potential remedies to those that would not result in a loss of more than 15% of ChampionX’s aggregate annual 2023 revenues and (iii) a regulatory reverse termination fee that would be payable by SLB equal to 4% of ChampionX’s enterprise value implied by the transaction.

On March 30, 2024, Mr. Kasibhatla requested, and Mr. Saurabh Nitin provided, additional due diligence materials relating to ChampionX’s cash flow forecast.

Also on March 30, 2024, Mr. Le Peuch contacted Mr. Somasundaram to inform him that SLB would be sending a revised written non-binding proposal (the “March 30 SLB Proposal”). During that discussion, Mr. Le Peuch noted to Mr. Somasundaram that the March 30 SLB Proposal represented SLB’s final position with respect to the economic terms of the potential transaction. Thereafter, Mr. Le Peuch sent Mr. Somasundaram the March 30 SLB Proposal, which proposed (i) an exchange ratio of 0.735 shares of SLB common stock for each share of ChampionX common stock, with no special cash dividend to ChampionX stockholders prior to the closing of the potential transaction, (ii) a regulatory cooperation covenant that limited SLB’s obligation to agree to potential remedies to those that would not result in a loss of more than 8% of ChampionX’s aggregate annual 2023 revenues and (iii) a regulatory reverse termination fee that would be payable by SLB equal to 4% of ChampionX’s enterprise value implied by the transaction. Promptly following receipt, Mr. Somasundaram shared the March 30 SLB Proposal with the ChampionX Board and the company’s advisors.

On March 30, 2024, and following receipt of the March 30 SLB Proposal, an update call was held with the ChampionX Board, members of ChampionX senior management and representatives of Centerview and Weil to consider the terms of the March 30 SLB Proposal. Representatives of Centerview reviewed with the ChampionX Board, Centerview’s preliminary financial analyses of the proposed exchange ratio of 0.735 shares of SLB common stock for each share of ChampionX common stock. Following discussion and deliberation, the ChampionX Board expressed their support for the exchange ratio and for the other terms of the March 30 SLB Proposal, subject to finalizing the documentation with respect to the transaction on terms acceptable to ChampionX.

Later on March 30, 2024, Mr. Somasundaram contacted Mr. Le Peuch to indicate ChampionX’s acceptance of the March 30 SLB Proposal, which Mr. Somasundaram subsequently confirmed via email.

Also on March 30, 2024, Weil sent comments on the draft merger agreement to Latham that, consistent with the ChampionX Board’s support of the March 30 SLB Proposal, reflected terms consistent with those of the March 30 SLB Proposal.

During the course of April 1, 2024, representatives of Latham and Weil negotiated remaining open terms of the draft merger agreement.

On April 1, 2024, the SLB Board held a meeting by videoconference, which was attended by members of SLB senior management. During the meeting, members of SLB’s management reviewed the history of negotiations with ChampionX and the principal terms of the draft merger agreement. The SLB Board discussed the strategic rationale for the potential transaction, the valuation implied by the exchange ratio, the synergies and potential benefits from the transaction, the risks associated with consummating the potential transaction, and the anticipated timing to closing, as well as the communication plan with stockholders, customers, employees, and other key constituents, and the proposed communications strategy in connection with the announcement of the proposed transaction. Following such discussion, the SLB Board approved SLB’s entry into the Merger Agreement and related matters.

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In the evening of April 1, 2024, the ChampionX Board held a meeting by videoconference, which was attended by members of ChampionX senior management and representatives of Centerview and Weil. During the meeting, members of ChampionX’s management and its financial and legal advisors reviewed the history of negotiations with SLB and the terms of the draft merger agreement, which had been circulated to the ChampionX Board in advance of the meeting. Representatives of Centerview reviewed with the ChampionX Board Centerview’s financial analyses of the exchange ratio provided for in the proposed merger agreement. Representatives of Weil then reviewed with the ChampionX Board their fiduciary duties under Delaware law in the context of their consideration of the potential transaction, the principal terms of the draft merger agreement and a description of the other transaction documents, including the ChampionX disclosure schedules, the SLB disclosure schedules and the form of the certificate of incorporation of ChampionX. Representatives of Weil noted to the ChampionX Board that Weil and senior management were continuing to finalize certain provisions in the draft merger agreement, as well as the likely resolutions of such terms. The ChampionX Board discussed the strategic rationale for the potential transaction, the valuation implied by the exchange ratio, the value of the SLB common stock, the ability of ChampionX stockholders to participate in the value and opportunities of SLB after the merger, the synergies and potential benefits from the transaction as compared with the company’s standalone plan, the risks associated with consummating the potential transaction and the timing to closing, as well as the communication plan with stockholders, customers, employees, and other key constituents and the proposed communications strategy in connection with the announcement of the proposed transaction. Thereafter, representatives of Centerview rendered Centerview’s oral opinion, which was subsequently confirmed by delivery of its written opinion, to the ChampionX Board on April 1, 2024, that, as of such date and based upon and subject to the various assumptions made, procedures followed, matters considered, and qualifications and limitations upon the review undertaken by Centerview in preparing its opinion, the exchange ratio provided for pursuant to the proposed merger agreement was fair, from a financial point of view, to holders of ChampionX common stock (other than holders of shares of ChampionX excluded stock). For more information, see the section of this proxy statement/prospectus entitled “—Opinion of Centerview.” Also at the meeting, representatives of Weil and Mr. Somasundaram outlined for the ChampionX Board the proposed terms of Centerview’s engagement pursuant to a formal engagement letter with Centerview. The ChampionX Board then authorized ChampionX to formally engage Centerview through entry into the engagement letter.

Following further discussion and deliberation, including taking into account the factors described below in greater detail in the section of this proxy statement/prospectus entitled “—ChampionX’s Reasons for the Merger; Recommendation of the ChampionX Board,” the ChampionX Board unanimously (i) determined the merger agreement and the consummation of the merger and the transactions, to be fair to and in the best interests of ChampionX and its stockholders, (ii) declared the merger agreement and the consummation of the transactions, including the merger, to be advisable, (iii) authorized and approved the merger agreement, including the execution, delivery and performance thereof, (iv) directed that the merger agreement be submitted to the stockholders of ChampionX for their consideration and adoption and (v) recommended that the stockholders of ChampionX adopt the merger agreement.

Following the meeting of the ChampionX Board, on April 1, 2024, ChampionX entered into an engagement letter with Centerview.

Throughout the evening of April 1, 2024 and early into the morning on April 2, 2024, representatives of ChampionX, SLB, Latham and Weil continued to finalize the outstanding terms of the draft merger agreement and the other transaction documents. The final transaction documents, including the merger agreement, ChampionX disclosure schedules, SLB disclosure schedules and the form of the certificate of incorporation of ChampionX as the surviving entity in the merger, all in a form consistent with the terms described to the ChampionX Board at the earlier meeting, were provided to the ChampionX Board on the morning of April 2, 2024, at which time the ChampionX Board unanimously confirmed their prior approval of, among other things, ChampionX’s entry into the merger agreement. Thereafter, the parties executed the merger agreement on the morning of April 2, 2024.

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In the morning of April 2, 2024, the boards of directors of each of Sodium Holdco and Sodium Merger Sub held meetings at which they approved, among other things, the entry into the merger agreement by those respective entities.

Before the opening of financial markets in New York on April  2, 2024, ChampionX and SLB issued a joint press release announcing the execution of the merger agreement.

ChampionX’s Reasons for the Merger; Recommendation of the ChampionX Board of Directors

On April 1, 2024, the ChampionX Board unanimously (i) determined the Merger Agreement and the consummation of the Merger and the Transactions, to be fair to and in the best interests of ChampionX and its stockholders, (ii) declared the Merger Agreement and the consummation of the Transactions, including the Merger, to be advisable, (iii) authorized and approved the Merger Agreement, including the execution, delivery and performance thereof, (iv) directed that the Merger Agreement be submitted to the stockholders of ChampionX for their consideration and adoption and (v) recommended the stockholders of ChampionX adopt the Merger Agreement.

Accordingly, the ChampionX Board unanimously recommends that the ChampionX stockholders vote “FOR” the Merger Proposal, “FOR” the Compensation Proposal and “FOR” the Adjournment Proposal.

In the course of reaching its determinations and recommendations, the ChampionX Board reviewed and discussed a significant amount of information, consulted with and received the advice of ChampionX’s outside legal and financial advisors, held discussions with ChampionX’s management and considered a number of factors that it believed supported its decision to enter into the Merger Agreement. The following are some of the significant factors that supported the ChampionX Board’s determination to approve the Merger Agreement and recommend adoption of the Merger Agreement by the ChampionX stockholders (which are presented below in no particular order and are not exhaustive):

Benefits of the Combination.

Value and Composition of the Consideration.

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Synergies and Strategic Considerations.

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Opinion of Financial Advisor.

Due Diligence.

Likelihood of Completion of the Transaction.

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Terms of the Merger Agreement.

In the course of its deliberations, the ChampionX Board also considered a variety of risks, uncertainties and other countervailing factors related to entering into the Merger Agreement, the Merger and the other Transactions, including but not limited to (not necessarily presented in order of relative importance):

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In addition, the ChampionX Board was aware of and considered the interests of its directors and executive officers that are different from, or in addition to, the interests of ChampionX stockholders generally. See the section entitled “The Merger—Interests of ChampionX’s Directors and Executive Officers in the Merger.”

The foregoing discussion of information and factors considered by the ChampionX Board is not, and is not intended to be, exhaustive but summarizes the material factors considered by the ChampionX Board. In light of the variety of factors considered in connection with their evaluation of the Merger Agreement and the Merger, the ChampionX Board did not find it useful to, and did not, quantify, rank or otherwise assign relative weights to the specific factors considered in reaching their determinations and recommendations. Moreover, each member of the ChampionX Board applied his or her own personal business judgment to the process and may have given different weight to different factors. The ChampionX Board based its recommendation on the totality of the information presented, including thorough discussions with, and questioning of, ChampionX’s senior management and outside legal and financial advisors.

It should be noted that this explanation of the reasoning of the ChampionX Board and certain information presented in this section is forward-looking in nature and should be read in light of the factors set forth in the section entitled “Cautionary Statement Regarding Forward-Looking Statements.”

SLB’s Reasons for the Merger

SLB believes the Merger will create sustainable long-term value for its stockholders. Key factors considered by SLB include the following:

Listing of SLB Common Stock and Delisting and Deregistration of ChampionX Common Stock

SLB will use reasonable best efforts to cause the SLB common stock to be issued and delivered in the Merger and such other SLB common stock to be reserved for issuance in connection with the Merger to be approved for

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listing on the NYSE, where SLB common stock is currently traded. If the Merger is completed, shares of ChampionX common stock will be delisted from Nasdaq, will be deregistered under the Exchange Act and will cease to be publicly traded.

Opinion of ChampionX’s Financial Advisor

On April 1, 2024, Centerview rendered to the ChampionX Board its oral opinion, subsequently confirmed by delivery of a written opinion dated April 1, 2024, that, as of such date and based upon and subject to the various assumptions made, procedures followed, matters considered, and qualifications and limitations upon the review undertaken by Centerview in preparing its opinion, the Exchange Ratio provided for pursuant to the Merger Agreement was fair, from a financial point of view, to holders of ChampionX common stock (other than holders of shares of ChampionX Excluded Stock and any shares of ChampionX common stock held by any affiliate of ChampionX or SLB).

The full text of Centerview’s written opinion, dated April 1, 2024, which describes the various assumptions made, procedures followed, matters considered, and qualifications and limitations upon the review undertaken by Centerview in preparing its opinion, is attached as Annex B to this proxy statement/prospectus and is incorporated by reference into this proxy statement/prospectus. The summary of the written opinion of Centerview set forth below is qualified in its entirety by reference to the full text of Centerview’s written opinion attached as Annex B to this proxy statement/prospectus and incorporated by reference into this proxy statement/prospectus. Centerview’s financial advisory services and opinion were provided for the information and assistance of the ChampionX Board (in the directors’ capacity as directors and not in any other capacity) in connection with and for purposes of its consideration of the Merger and the Transactions and Centerview’s opinion addressed only the fairness, from a financial point of view, as of the date thereof, to the holders of shares of ChampionX common stock (other than holders of shares of ChampionX Excluded Stock and any shares of ChampionX common stock held by any affiliate of ChampionX or SLB) of the Exchange Ratio provided for pursuant to the Merger Agreement. Centerview’s opinion did not address any other term or aspect of the Merger Agreement, the Merger or the Transactions and does not constitute a recommendation to any ChampionX stockholder or any other person as to how such stockholder or other person should vote with respect to the Merger or otherwise act with respect to the Merger and the Transactions or any other matter.

The full text of Centerview’s written opinion should be read carefully in its entirety for a description of the various assumptions made, procedures followed, matters considered, and qualifications and limitations upon the review undertaken by Centerview in preparing its opinion.

In connection with rendering the opinion described above and performing its related financial analyses, Centerview reviewed, among other things:

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Centerview also participated in discussions with members of the senior management and representatives of ChampionX regarding their assessment of the ChampionX Internal Data, as appropriate, and the strategic rationale for the Merger. In addition, Centerview reviewed publicly available financial and stock market data, including valuation multiples, for ChampionX and SLB and compared that data with similar data for certain other companies, the securities of which are publicly traded, in lines of business that Centerview deemed relevant. Centerview also conducted such other financial studies and analyses and took into account such other information as Centerview deemed appropriate.

Centerview assumed, without independent verification or any responsibility therefor, the accuracy and completeness of the financial, legal, regulatory, tax, accounting and other information supplied to, discussed with, or reviewed by Centerview for purposes of its opinion and, with consent of the ChampionX Board, Centerview relied upon such information as being complete and accurate. In that regard, Centerview assumed, at the ChampionX Board’s direction, that the ChampionX Internal Data (including, without limitation, the ChampionX Forecast) were reasonably prepared on bases reflecting the best currently available estimates and judgments of the management of ChampionX as to the matters covered thereby and Centerview relied, at the ChampionX Board’s direction, on the ChampionX Internal Data for purposes of Centerview’s analysis and opinion. Centerview expressed no view or opinion as to the ChampionX Internal Data or the assumptions on which it was based. In addition, at the ChampionX Board’s direction, Centerview did not make any independent evaluation or appraisal of any of the assets or liabilities (contingent, derivative, off-balance-sheet or otherwise) of ChampionX or SLB, nor was Centerview furnished with any such evaluation or appraisal, and Centerview was not asked to conduct, and did not conduct, a physical inspection of the properties or assets of ChampionX or SLB. Centerview assumed, at the ChampionX Board’s direction, that the final executed Merger Agreement would not differ in any respect material to Centerview’s analysis or opinion from the Draft Merger Agreement reviewed by Centerview. Centerview also assumed, at the ChampionX Board’s direction, that the Merger will be consummated on the terms set forth in the Merger Agreement and in accordance with all applicable laws and other relevant documents or requirements, without delay or the waiver, modification or amendment of any term, condition or agreement, the effect of which would be material to Centerview’s analysis or Centerview’s opinion and that, in the course of obtaining the necessary governmental, regulatory and other approvals, consents, releases and waivers for the Merger and the Transactions, no delay, limitation, restriction, condition or other change, including any divestiture requirements or amendments or modifications, will be imposed, the effect of which would be material to Centerview’s analysis or Centerview’s opinion. Centerview did not evaluate and did not express any opinion as to the solvency or fair value of ChampionX or SLB, the ability of ChampionX or SLB to pay their respective obligations when they come due, or as to the impact of the Merger and the other Transactions on such matters, under any state, federal or other laws relating to bankruptcy, insolvency or similar matters. Centerview is not a legal, regulatory, tax or accounting advisor, and Centerview expressed no opinion as to any legal, regulatory, tax or accounting matters.

Centerview’s opinion expressed no view as to, and did not address, ChampionX’s underlying business decision to proceed with or effect the Merger and the Transactions, or the relative merits of the Merger and the Transactions as compared to any alternative business strategies or transactions that might be available to ChampionX or in which ChampionX might engage. Centerview’s opinion was limited to and addressed only the fairness, from a financial point of view, as of the date of Centerview’s written opinion, to the holders of shares of ChampionX common stock (other than holders of shares of ChampionX Excluded Stock and any shares of ChampionX common stock held by any affiliate of ChampionX or SLB) of the Exchange Ratio provided for pursuant to the Merger Agreement. For purposes of its opinion, Centerview was not asked to, and Centerview did not, express any view on, and its opinion did not address, any other term or aspect of the Merger Agreement, Merger or the Transactions, including, without limitation, the structure or form of the Merger or any other agreements or arrangements contemplated by the Merger Agreement or entered into in connection with or otherwise contemplated by the Merger, including, without limitation, the fairness of the Merger or any other term or aspect of the Merger and the Transactions to, or any consideration to be received in connection therewith by, or the impact of the Merger and the Transactions on, the holders of any other class of securities, creditors or other constituencies of ChampionX or any other party. In addition, Centerview expressed no view or opinion as to the

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fairness (financial or otherwise) of the amount, nature or any other aspect of any compensation to be paid or payable to any of the officers, directors or employees of ChampionX or any party, or class of such persons in connection with the Merger and the Transactions, whether relative to the Equity Consideration to be paid to the holders of shares of ChampionX common stock pursuant to the Merger Agreement or otherwise. Centerview’s opinion was necessarily based on financial, economic, monetary, currency, market and other conditions and circumstances as in effect on, and the information made available to Centerview as of, the date of Centerview’s written opinion, and Centerview does not have any obligation or responsibility to update, revise or reaffirm its opinion based on circumstances, developments or events occurring after the date of Centerview’s written opinion. Centerview expressed no view or opinion as to what the value of the SLB common stock actually will be when issued pursuant to the Merger or the prices at which the ChampionX common stock or SLB common stock will trade or otherwise be transferable at any time, including following the announcement or consummation of the Merger. Centerview’s opinion does not constitute a recommendation to any ChampionX stockholder or any other person as to how such ChampionX stockholder or other person should vote with respect to the Merger or otherwise act with respect to the Merger and the Transactions or any other matter. Centerview’s financial advisory services and its written opinion were provided for the information and assistance of the ChampionX Board (in the directors’ capacity as directors and not in any other capacity) in connection with and for purposes of its consideration of the Merger and the Transactions. The issuance of Centerview’s opinion was approved by the Centerview Partners LLC Fairness Opinion Committee.

Summary of Centerview Financial Analysis

The following is a summary of the material financial analyses prepared and reviewed with the ChampionX Board in connection with Centerview’s opinion, dated April 1, 2024. The summary set forth below does not purport to be a complete description of the financial analyses performed or factors considered by, and underlying the opinion of, Centerview, nor does the order of the financial analyses described represent the relative importance or weight given to those financial analyses by Centerview. Centerview may have deemed various assumptions more or less probable than other assumptions, so the reference ranges resulting from any particular portion of the analyses summarized below should not be taken to be Centerview’s view of the actual value of ChampionX. Some of the summaries of the financial analyses set forth below include information presented in tabular format. In order to fully understand the financial analyses, the tables must be read together with the text of each summary, as the tables alone do not constitute a complete description of the financial analyses performed by Centerview. Considering the data in the tables below without considering all financial analyses or factors or the full narrative description of such analyses or factors, including the methodologies and assumptions underlying such analyses or factors, could create a misleading or incomplete view of the processes underlying Centerview’s financial analyses and its opinion. In performing its analyses, Centerview made numerous assumptions with respect to industry performance, general business and economic conditions and other matters, many of which are beyond the control of ChampionX or any other parties to the Merger. None of ChampionX, SLB, Holdco, Merger Sub or Centerview or any other person assumes responsibility if future results are materially different from those discussed. Any estimates contained in these analyses are not necessarily indicative of actual values or predictive of future results or values, which may be significantly more or less favorable than as set forth below. In addition, analyses relating to the value of ChampionX do not purport to be appraisals or reflect the prices at which ChampionX may actually be sold. Accordingly, the assumptions and estimates used in, and the results derived from, the financial analyses are inherently subject to substantial uncertainty. Except as otherwise noted, the following quantitative information, to the extent that it is based on market data, is based on market data as it existed on or before April 1, 2024 (the last trading day before the public announcement of the Merger) and is not necessarily indicative of current market conditions.

Selected Public Company Analysis

Centerview reviewed and compared certain financial information, ratios and multiples of ChampionX and compared it to corresponding financial information of certain publicly-traded, oilfield services and equipment companies (which companies are referred to as the “selected companies” in this summary of Centerview’s

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opinion) that Centerview, based on its experience and professional judgment, deemed relevant to consider in relation to ChampionX. Although none of the selected companies is identical or directly comparable to ChampionX, the selected companies were selected by Centerview because, among other reasons, they are publicly-traded, oilfield services and equipment companies with certain business, operational and/or financial characteristics that, for purposes of Centerview’s analysis, may be considered similar to those of ChampionX.

However, because none of the selected companies is exactly the same as ChampionX, Centerview believed that it was inappropriate to, and therefore did not, rely solely on the quantitative results of the selected public company analysis. Accordingly, Centerview also made qualitative judgments, based on its experience and professional judgment, concerning differences between the business, operational and/or financial characteristics and other factors that could affect the public trading values of the selected companies and ChampionX in order to provide a context in which to consider the results of the quantitative analysis.

Using publicly available information obtained from SEC filings and other data sources as of April 1, 2024, Centerview calculated, for each selected company, such company’s enterprise value (calculated as the equity value (determined using the treasury stock method and taking into account outstanding in-the-money options, deferred stock units, restricted stock units, and performance share awards (including assumptions regarding the vesting of such performance share awards)), plus the book value of debt and certain liabilities less cash and cash equivalents) as a multiple of Wall Street research analyst consensus estimated adjusted EBITDA for calendar year 2024 (“EV/2024E Adj. EBITDA Multiple”).

The selected companies are summarized below:

Based on this analysis and other considerations that Centerview deemed relevant in its professional judgment and experience, related to, among other things, differences in the business, operational and/or financial conditions and prospects of ChampionX and the companies included in the selected public company analysis, Centerview selected a reference range of EV/2024E Adj. EBITDA Multiples of 8.5x to 9.5x. Centerview applied this reference range of EV/2024E Adj. EBITDA Multiples to ChampionX’s estimated calendar year 2024 adjusted EBITDA of $845 million as set forth in the ChampionX Forecast, subtracted the book value of ChampionX’s net debt as of December 31, 2023 of $312 million, as provided by ChampionX management, from the implied enterprise values and divided the results of the foregoing calculations by the number of fully diluted outstanding shares of ChampionX common stock (determined using the treasury stock method and taking into account outstanding in-the-money options, deferred stock units, restricted stock units, and performance share awards (including assumptions regarding the vesting of such performance share awards)) based on information provided by the management of ChampionX in the ChampionX Internal Data. This analysis resulted in an implied per share equity value range for shares of ChampionX common stock of approximately $35.25 to $39.50, rounded to the nearest $0.25. Centerview then compared this range to the Equity Consideration of $40.59 per share of ChampionX common stock implied by the Exchange Ratio and the $55.22 trading price of SLB common stock as of the close of trading on April 1, 2024 to be paid to the holders of shares of ChampionX common stock (other than ChampionX Excluded Stock) pursuant to the Merger Agreement.

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Discounted Cash Flow Analysis

Centerview performed a discounted cash flow analysis of ChampionX based on the ChampionX Forecast. A discounted cash flow analysis is a traditional valuation methodology used to derive a valuation of an asset or set of assets by calculating the “present value” of estimated future cash flows of the asset or set of assets. “Present value” refers to the current value of future cash flows or amounts and is obtained by discounting those future cash flows or amounts by a discount rate that takes into account macroeconomic assumptions and estimates of risk, the opportunity cost of capital, expected returns and other appropriate factors.

In performing this analysis, Centerview calculated an implied per share range of equity values for shares of ChampionX common stock by (a) discounting to present value as of December 31, 2023 using discount rates ranging from 11.00% to 12.50% (based on Centerview’s analysis of ChampionX’s weighted average cost of capital and considerations that Centerview deemed relevant based on its experience and professional judgment) and using a mid-year convention: (i) the forecasted after-tax unlevered free cash flows of ChampionX over the period beginning on January 1, 2024 and ending on December 31, 2028, as set forth in the ChampionX Forecast, utilized by Centerview at the direction of ChampionX management and as approved by the ChampionX Board for use by Centerview as set forth in the section captioned “Certain Unaudited Forecasted Financial Information,” and (ii) a range of illustrative terminal values of ChampionX, calculated by Centerview using a reference range of enterprise value-to-adjusted EBITDA multiples of 9.0x to 10.0x (which range was selected by Centerview using its experience and professional judgment) and applying this reference range of enterprise value-to-adjusted EBITDA multiples to ChampionX’s estimated last 12 months adjusted EBITDA as of December 31, 2028 and (b) subtracting from the foregoing results the book value of ChampionX’s net debt as of December 31, 2023 of $312 million, as provided by ChampionX management.

Centerview then calculated a range of implied equity values per share of ChampionX common stock by dividing the result of the foregoing calculations by the number of fully diluted outstanding shares of ChampionX common stock (determined using the treasury stock method and taking into account outstanding in-the-money options, deferred stock units, restricted stock units, and performance share awards (including assumptions regarding the vesting of such performance share awards)) based on information provided by the management of ChampionX in the ChampionX Internal Data. This analysis resulted in an implied per share equity value range for shares of ChampionX common stock of approximately $37.50 to $43.25, rounded to the nearest $0.25. Centerview then compared this range to the Equity Consideration of $40.59 per share of ChampionX common stock implied by the Exchange Ratio and the $55.22 trading price of SLB common stock as of the close of trading on April 1, 2024 to be paid to the holders of shares of ChampionX common stock (other than ChampionX Excluded Stock) pursuant to the Merger Agreement.

Other Factors

Centerview noted for the ChampionX Board the following additional factors solely for reference and informational purposes only:

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General

The preparation of a financial opinion is a complex analytical process involving various determinations as to the most appropriate and relevant methods of financial analysis and the application of those methods to the particular circumstances and, therefore, a financial opinion is not readily susceptible to summary description. In arriving at its opinion, Centerview did not draw, in isolation, conclusions from or with regard to any factor or analysis that it considered. Rather, Centerview made its determination as to fairness on the basis of its experience and professional judgment after considering the results of all of the analyses.

Centerview’s financial analyses and opinion were only one of many factors taken into consideration by the ChampionX Board in its evaluation of the Merger and the Transactions. Consequently, the analyses described above should not be viewed as determinative of the views of the ChampionX Board or management of ChampionX with respect to the Exchange Ratio, the Equity Consideration or as to whether the ChampionX Board would have been willing to determine that a different consideration was fair. The consideration for the Merger and the Transactions was determined through arm’s-length negotiations between ChampionX and SLB and was approved by the ChampionX Board. Centerview provided advice to ChampionX during these negotiations. Centerview did not, however recommend any specific amount of consideration to ChampionX or the ChampionX Board or that any specific amount of consideration constituted the only appropriate consideration for the Merger and the Transactions.

Centerview is a securities firm engaged directly and through affiliates and related persons in a number of investment banking, financial advisory and merchant banking activities. In the two years prior to the date of its written opinion, except for Centerview’s current engagement, Centerview had not been engaged to provide financial advisory or other services to ChampionX, and did not receive any compensation from ChampionX during such period. In the two years prior to the date of its written opinion, Centerview had not been engaged to provide financial advisory services or other services to SLB, Holdco or Merger Sub, and did not receive any compensation from SLB, Holdco or Merger Sub during such period. Centerview may provide financial advisory and other services to or with respect to ChampionX or SLB or their respective affiliates in the future, for which Centerview may receive compensation. Certain (i) of Centerview’s and its affiliates’ directors, officers, members and employees, or family members of such persons, (ii) of Centerview’s affiliates or related investment funds and (iii) investment funds or other persons in which any of the foregoing may have financial interests or with which they may co-invest, may at any time acquire, hold, sell or trade, in debt, equity and other securities or financial instruments (including derivatives, bank loans or other obligations) of, or investments in, ChampionX, SLB, or any of their respective affiliates, or any other party that may be involved in the Merger and the Transactions.

The ChampionX Board selected Centerview as its financial advisor in connection with the Merger based on Centerview’s reputation, experience and knowledge of the oil and gas industry. Centerview is an internationally recognized investment banking firm that has substantial experience in transactions similar to the Merger. In connection with Centerview’s services as the financial advisor to the ChampionX Board, ChampionX has agreed to pay Centerview an aggregate fee of approximately $48 million, $5 million of which was payable upon delivery

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of its opinion, and the remainder of which is payable contingent upon consummation of the Merger. In addition, ChampionX has agreed to reimburse certain of Centerview’s expenses arising, and to indemnify Centerview against certain liabilities that may arise, out of Centerview’s engagement.

Certain Unaudited Forecasted Financial Information

While ChampionX has from time to time provided limited financial guidance to investors, ChampionX has not, as a matter of course, otherwise publicly disclosed internal projections as to future performance, earnings or other results reflecting an extended period due to, among other reasons, the uncertainty, unpredictability and subjectivity of the underlying assumptions and estimates. However, in connection with the ChampionX Board’s evaluation of the Merger and other strategic alternatives, ChampionX’s management prepared and provided to the ChampionX Board and to ChampionX’s financial advisor, Centerview, for its use and reliance in connection with its financial analyses and opinion, certain nonpublic, internal financial projections regarding ChampionX’s future operations, on a standalone basis and excluding the effects of the Merger, for fiscal years ending December 31, 2024 through December 31, 2028 (the “ChampionX Forecast”). The ChampionX Forecast was approved by the ChampionX Board for use by Centerview in connection with the financial analyses presented by Centerview to the ChampionX Board and in Centerview’s opinion, as described under the sections of this proxy statement/prospectus entitled “—Opinion of ChampionX’s Financial Advisor.”

In addition, ChampionX’s management made a presentation to SLB, which included forecasts of ChampionX’s revenue, Adjusted EBITDA and Levered Free Cash Flow for the fiscal years ending December 31, 2024 through December 31, 2026 (the “Management Presentation Base Case Forecast”). The financial projections for the line items included in the Management Presentation Base Case Forecast were identical to the same line items presented in the ChampionX Forecast except for certain immaterial differences (i) for the fiscal year ending December 31, 2024 as described under “—Forecasts—Management Presentation Forecasts” and (ii) due to rounding for the fiscal years ending December 31, 2025 and 2026. ChampionX’s management also presented to SLB an illustrative upside forecast of ChampionX’s revenue, Adjusted EBITDA and Levered Free Cash Flow for the fiscal years ending December 31, 2024 through December 31, 2026 based on certain adjustments to the underlying assumptions in the ChampionX Forecast as described under “—Forecasts—Management Presentation Forecasts” (the “Management Presentation Upside Case Forecast” and, together with the Management Presentation Base Case Forecast, the “Management Presentation Forecasts,” the Management Presentation Forecasts together with the ChampionX Forecast, the “Forecasts”). The Management Presentation Forecasts were also provided to the ChampionX Board.

The Forecasts were not prepared with a view toward compliance with published guidelines of the SEC or the guidelines established by the American Institute of Certified Public Accountants for preparation or presentation of prospective financial information, but in the view of ChampionX’s management, such projections were prepared on a reasonable basis and reflect the assumptions and estimates available at the time they were prepared. The Forecasts required significant estimates and assumptions that make them inherently less comparable to the similarly titled GAAP measures in ChampionX’s historical GAAP financial statements.

The Forecasts included in this section of the proxy statement/prospectus have been prepared by, and are the responsibility of, ChampionX’s management. PricewaterhouseCoopers LLP has not audited, reviewed, examined, compiled nor applied agreed-upon procedures with respect to the Forecasts and, accordingly, PricewaterhouseCoopers LLP does not express an opinion or any other form of assurance with respect thereto. The reports of PricewaterhouseCoopers LLP, incorporated by reference into this proxy statement/prospectus, relate to SLB’s and ChampionX’s previously issued financial statements. They do not extend to the Forecasts and should not be read to do so.

While presented with numeric specificity, the Forecasts reflect assumptions and estimates that were deemed to be reasonable as of the respective dates on which those assumptions and estimates were made but are inherently uncertain. The Forecasts reflect both assumptions as to certain business decisions that are subject to change and,

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in many respects, subjective judgment, which are susceptible to multiple interpretations and periodic revisions based on actual experience and business developments, including judgments with respect to, among other things, industry performance and competition, general business, economic, regulatory, market and financial conditions, and other future events, and future business decisions that may not be realized and that are inherently subject to significant business, economic, competitive and regulatory uncertainties and contingencies, including, among other things, the inherent uncertainty of the business and economic conditions affecting the industry in which ChampionX operates, and the risks and uncertainties described under the sections of this proxy statement/prospectus entitled “Risk Factors,” “Cautionary Statement Regarding Forward-Looking Statements” and “Where You Can Find More Information.” In addition, the Forecasts may be affected by ChampionX’s ability to achieve strategic goals, objectives and targets over the applicable periods.

Neither ChampionX nor SLB can give any assurance that the Forecasts and the underlying assumptions and estimates will be realized. In addition, since the Forecasts are forward-looking and cover multiple years, such information by its nature becomes less predictive with each successive year. Actual results may differ materially from those set forth below, and important factors that may affect actual results and cause the Forecasts to be inaccurate include risks and uncertainties relating to ChampionX’s and SLB’s businesses, industry performance, the regulatory environment, general business and economic conditions and other matters described under the sections of this proxy statement/prospectus entitled “Risk Factors,” “Cautionary Statement Regarding Forward-Looking Statements” and “Where You Can Find More Information.”

The inclusion of a summary of the Forecasts in this proxy statement/prospectus should not be regarded as an indication that either of ChampionX or SLB or their respective officers, directors, affiliates, advisors or other representatives considered the Forecasts to necessarily be predictive of actual future events, and the Forecasts should not be relied upon as such nor should the information contained in the Forecasts be considered appropriate for other purposes. None of ChampionX, SLB, or their respective officers, directors, affiliates, advisors, or other representatives can give you any assurance that actual results will not differ materially from the ChampionX unaudited prospective financial information. Furthermore, the Forecasts do not take into account any circumstances or events occurring after the date they were prepared. Neither ChampionX nor SLB can give any assurance that, had the Forecasts been prepared either as of the date of the Merger Agreement or as of the date of this proxy statement/prospectus, similar estimates and assumptions would be used. Except as required by applicable securities laws, ChampionX and SLB do not intend to, and disclaim any obligation to, make publicly available any update or other revision to the Forecasts to reflect circumstances existing since their preparation or to reflect the occurrence of unanticipated events, even in the event that any or all of the underlying assumptions are shown to be in error, including with respect to the accounting treatment of the Merger under GAAP, or to reflect changes in general economic or industry conditions.

In light of the foregoing, and considering that the ChampionX Special Meeting will be held several months after the Forecasts were prepared, as well as the uncertainties inherent in any forecasted information, ChampionX stockholders are cautioned not to place undue reliance on such information, including while contemplating their vote on the Merger Proposal, Compensation Proposal or the Adjournment Proposal, and you should review ChampionX’s most recent SEC filings for a description of ChampionX’s reported financial results and SLB’s most recent SEC filings for a description of SLB’s reported financial results, as described in the section entitled “Where You Can Find More Information.”

ChampionX is including a summary of the Forecasts below to provide ChampionX stockholders with access to information that the ChampionX Board considered in connection with its evaluation of the Merger.

Forecasts

The following section sets forth a summary of the Forecasts. The Forecasts have not been updated or revised to reflect information or results after the date the Forecasts were prepared or as of the date of this proxy statement/prospectus. In particular, the Forecasts do not reflect ChampionX’s proposed acquisition of RMSpumptools Limited.

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Adjusted EBITDA, Adjusted EBIT, Levered Free Cash Flow and Unlevered Free Cash Flow included in the Forecasts are “non-GAAP financial measures,” which are financial performance measures that are not calculated in accordance with GAAP. Adjusted EBITDA, Adjusted EBIT, Levered Free Cash Flow and Unlevered Free Cash Flow were utilized by Centerview in connection with its opinion and by the ChampionX Board in connection their evaluation of the Merger. The SEC rules that would otherwise require a reconciliation of a non-GAAP financial measure to a GAAP financial measure do not apply to non-GAAP financial measures included in disclosures relating to a proposed business combination such as the Merger if the disclosure is included in a document such as this proxy statement/prospectus. In addition, reconciliations of Adjusted EBITDA, Adjusted EBIT, Levered Free Cash Flow and Unlevered Free Cash Flow were not relied upon by Centerview for purposes of its opinion or by the ChampionX Board in connection with their evaluation of the Merger. Accordingly, ChampionX has not provided a reconciliation of Adjusted EBITDA, Adjusted EBIT, Levered Free Cash Flow or Unlevered Free Cash Flow to the relevant GAAP financial measures. Non-GAAP financial measures should not be considered in isolation from, or as a substitute for, financial information presented in compliance with GAAP, and any non-GAAP financial measures as used by ChampionX may not be comparable to similarly titled amounts used by other companies. Furthermore, there are certain limitations in non-GAAP financial measures, because they exclude charges and credits that are required to be included in a GAAP presentation. Accordingly, these non-GAAP financial measures should be considered together with, and not as an alternative to, financial measures prepared in accordance with GAAP.

The ChampionX Forecast

The ChampionX Forecast represents ChampionX’s management’s evaluation of ChampionX’s estimated standalone future financial performance and is based on internal financial analyses that ChampionX has historically used in connection with its strategic planning processes. The ChampionX Forecast was approved by the ChampionX Board for use by Centerview in connection with the financial analyses presented by Centerview to the ChampionX Board and in Centerview’s opinion.

In developing the ChampionX Forecast, ChampionX’s management made numerous assumptions regarding ChampionX’s business, including:

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A summary of the ChampionX Forecast is presented in the following table, with all figures rounded to the nearest million.

The Management Presentation Forecasts

ChampionX’s management presented the Management Presentation Forecasts to SLB.

With respect to the Management Presentation Upside Case Forecast, ChampionX’s management made certain adjustments to the assumptions reflected in the ChampionX Forecast for the fiscal years ending December 31, 2024 through December 31, 2026 to reflect higher industry activity levels and additional Company growth initiatives, which assumptions included:

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A summary of the Management Presentation Base Case Forecast and the Management Presentation Upside Case Forecast is presented in the following table, with all figures rounded to the nearest million.

CHAMPIONX AND SLB DO NOT INTEND TO, AND DISCLAIM ANY OBLIGATION TO, UPDATE, CORRECT OR OTHERWISE REVISE THE FORECASTS TO REFLECT CIRCUMSTANCES EXISTING AFTER THE DATE OF THE MERGER AGREEMENT OR TO REFLECT THE OCCURRENCE OF FUTURE EVENTS, EVEN IN THE EVENT THAT ANY OR ALL OF THE ASSUMPTIONS UNDERLYING THE FORECASTS ARE NO LONGER APPROPRIATE (EVEN IN THE SHORT TERM).

Interests of ChampionX’s Directors and Executive Officers in the Merger

In considering the recommendation of the ChampionX Board that ChampionX stockholders approve the Merger and vote in favor of the Merger Proposal and the Compensation Proposal, ChampionX stockholders should be aware that the executive officers and directors of ChampionX have certain interests in the Merger that are or may be different from, or in addition to, the interests of ChampionX stockholders generally. The ChampionX Board was aware of these interests and considered them, among other matters, in evaluating and approving the Merger Agreement, and in making its recommendation that ChampionX stockholders adopt the Merger Agreement.

These interests are described in more detail below, and certain of them are quantified in the narrative and the table below. The Merger will be a change in control for purposes of the ChampionX executive compensation plans and agreements described below.

For purposes of this disclosure, the named executive officers of ChampionX are Sivasankaran Somasundaram, President and Chief Executive Officer, Kenneth M. Fisher, Executive Vice President and Chief Financial Officer, Deric Bryant, Chief Operating Officer and President, Chemical Technologies, Paul E. Mahoney, President, Production & Automation Technologies and Julia Wright, Senior Vice President, General Counsel and Secretary.

Treatment of ChampionX Equity Awards in the Merger

Under the terms of the Merger Agreement, at the Effective Time, and by virtue of the Merger and without any action on the part of SLB, Holdco, Merger Sub and ChampionX or the holders thereof:

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Under the terms of the ChampionX Equity Plan, all unvested awards held by the eligible executive officers of ChampionX will become vested and will be settled upon a Qualifying Termination (as defined below) (i.e.,

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“double-trigger” vesting). See the section entitled “—Summary of Payments and Benefits to ChampionX’s Named Executive Officers” below for the estimated amount that would be payable to each ChampionX named executive officer in respect of payout of their ChampionX SARs and ChampionX DSUs in connection with the Merger and accelerated vesting of other unvested ChampionX Equity Awards in connection with a Qualifying Termination.

In addition, based on the same assumptions as described in such section, (x) the aggregate estimated amount that would be payable to the three ChampionX executive officers who are not named executive officers in respect of the payout of their ChampionX SARs in connection with the Merger is $331,134 and in respect of the accelerated vesting of their other unvested ChampionX Equity Awards is $6,945,920, of which (i) $2,534,531 is payable in respect of ChampionX RSUs (including the associated payments in connection with ChampionX DERs), and (ii) $4,411,389 is payable in respect of ChampionX Performance Shares; and (y) the estimated amounts that would be payable to each current non-employee director of ChampionX in respect of the payout of their ChampionX DSU Awards (including ChampionX DSU Awards issuable in connection with the termination of their service under the terms of the ChampionX Equity Plan) in connection with the Merger are as follows: Daniel Rabun, $1,179,288; Heidi Alderman, $590,090; Mamatha Chamarthi, $1,179,288; Carlos Fierro, $196,350; Gary Luquette, $1,179,288; Elaine Pickle, $196,350; Stuart Porter, $590,090; and Stephen Todd, $1,009,883. In addition, the number of SLB Options that will be held by the ChampionX executive officers as a result of the conversion of their ChampionX Options into SLB Options in connection with the Merger will be as follows: for Mr. Bryant, 568,213 SLB Options, and for one ChampionX executive officer who is not a named executive officer, 157,652 SLB Options.

Change-in-Control Severance Plan

Each of the ChampionX executive officers (including each ChampionX named executive officer) participates in the ChampionX Corporation Amended and Restated Senior Executive Change-in-Control Severance Plan (“CIC Severance Plan”). Under the CIC Severance Plan, in the event that a ChampionX executive officer’s employment is terminated without “cause” or they resign for “good reason,” in each case within eighteen months following a change in control (“Qualifying Termination”), the executive officer would be eligible for the following compensation and benefits: (i) a lump sum payment equal to 2.5 (or for Mr. Somasundaram, 3.0) multiplied by the sum of (a) the executive officer’s annual base salary, and (b) the executive officer’s target annual incentive bonus, each measured on the termination date, or if higher, on the date of the change in control; (ii) a lump sum payment equal to the executive officer’s pro-rata target annual cash bonus for the year of termination or if higher, on the date of the change in control; and (iii) a lump sum payment equal to the then premium cost of COBRA health continuation coverage for eighteen months.

Payments under the CIC Severance Plan are conditioned upon the ChampionX executive officer timely executing a general release in favor of ChampionX and continued compliance with applicable restrictive covenants. The Merger will constitute a change in control for purposes of the CIC Severance Plan.

See the section entitled “—Summary of Payments and Benefits to ChampionX’s Named Executive Officers” below for the estimated change in control severance amounts for each ChampionX named executive officer. In addition, based on the same assumptions as described in such section, the aggregate estimated cash severance (excluding prorated bonus) that would be payable to the three ChampionX executive officers who are not named executive officers is $5,182,768.

Based on the same assumptions as described in the section entitled "—Summary of Payments and Benefits to ChampionX’s Named Executive Officers", in addition to the ChampionX DSU Awards issuable in connection with the termination of their service, the current non-employee directors of ChampionX shall be eligible to receive a pro-rata portion of their annual cash retainer ($112,500, or for the non-executive chairperson of the board, $125,000) based on the number of full calendar quarters that such individual served as a director of ChampionX as follows: Dan Rabun, $126,250; Heidi Alderman, $61,250; Mamatha Chamarthi, $61,250; Carlos Fierro, $61,250; Gary Luquette, $66,250; Elaine Pickle, $61,250; Stuart Porter, $58,750; and Stephen Todd, $68,750.

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Deferred Compensation Plan

Under the Apergy USA LLC Executive Deferred Compensation Plan (“DC Plan”), in the event of a change in control, the participants in the DC Plan will receive a lump sum distribution of their account balance, which is fully vested at all times, within sixty days following the change in control. The Merger will constitute a change in

control for purposes of the DC Plan. Mr. Somasundaram is the only executive officer who is a participant in the DC Plan. See the section entitled “—Summary of Payments and Benefits to ChampionX’s Named Executive Officers” below for the amounts payable under the DC Plan to Mr. Somasundaram.

Mirror Savings Plan

Under the ChampionX Mirror Savings Plan (“Mirror Plan”), in the event of a change in control, ChampionX will be required to establish an irrevocable trust for purposes of funding the vested accounts of each participant under the Mirror Plan. The terms of the Mirror Plan do not provide for acceleration of any payments or benefits upon a change in control (including the Merger). Mr. Bryant is the only named executive officer who is a participant in the Mirror Plan. The vested account balance under the Mirror Plan held by Mr. Bryant as of April 21, 2024 is $380,521. The aggregate current account balance under the Mirror Plan held by one ChampionX executive officer who is not a named executive officer as of April 21, 2024 is $122,413.

Annual Bonus for the Year of Closing

The Merger Agreement provides that on or about the Closing Date, ChampionX may pay to each individual who is employed by ChampionX or a subsidiary immediately before the Effective Time (including each ChampionX executive officer) a prorated annual cash bonus equal to the employee’s annual cash bonus opportunity for the year in which the closing of the Merger occurs, based on the greater of (a) actual performance as measured as of the Effective Time and (b) target performance, and prorated to reflect the portion of the year elapsed prior to the closing date. The annualized 2024 target bonus levels for the executive officers are as follows: Mr. Somasundaram, $1,192,788; Mr. Fisher, $586,788; Mr. Bryant, $523,332; Mr. Mahoney, $384,038; Ms. Wright, $363,462; and the three ChampionX executive officers who are not named executive officers, $794,469 (in the aggregate). See the section entitled “—Summary of Payments and Benefits to ChampionX’s Named Executive Officers” below for the estimated prorated bonus that would be payable to each ChampionX named executive officer. In addition, based on the same assumptions as described in such section, the aggregate estimated prorated bonus that would be payable to the three ChampionX executive officers who are not named executive officers is $270,481.

Retention Program

The Merger Agreement provides that prior to the closing date, ChampionX may establish a cash-based retention program in the aggregate amount of up to $60 million (inclusive of employer-side payroll and similar taxes) to promote retention and to incentivize efforts to consummate the Merger and to ensure a successful and efficient integration process. Allocations from this program may be made to any employee of ChampionX (including its executive officers, subject to a maximum of $10 million, inclusive of employer-side payroll and similar taxes). Any allocation from this program to ChampionX employees will be determined at the sole discretion of SLB, following consultation with the Chief Executive Officer of ChampionX or his designee. As of the date of this proxy statement/prospectus, there are no agreements or arrangements regarding allocation of awards under the retention program to any of the ChampionX executive officers.

2025 Annual ChampionX Equity Awards

To the extent closing of the Merger has not occurred by February 1, 2025, ChampionX may grant ChampionX RSU Awards and ChampionX Performance Share Awards to its employees (including its executive officers) in the ordinary course of business, with a maximum aggregate grant value of $25.6 million. These awards will have the same terms and conditions as applicable to the ChampionX RSU Awards and ChampionX Performance Share Awards granted in February 2024, except that ChampionX may elect to grant ChampionX RSU Awards in lieu of

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ChampionX Performance Share Awards, provided that such ChampionX RSU Awards will have the same dollar-denominated value as the ChampionX Performance Share Awards. Such awards will be converted into SLB RSU Awards at the closing of the Merger, as discussed in the section entitled “—Treatment of ChampionX Equity Awards” above. As of the date of this proxy statement/prospectus, ChampionX has not determined whether and to what extent ChampionX RSU Awards and ChampionX Performance Share Awards will be granted to its employees, including its executive officers.

Other Compensation Matters

In addition to the payments and benefits above, under the terms of the Merger Agreement, ChampionX may take certain compensation actions prior to the completion of the Merger that will affect ChampionX’s directors and executive officers, although determinations related to such actions have not been made as of the date of this proxy statement/prospectus and the impact of such actions is not reflected in the amounts estimated above. Among other actions, ChampionX may increase annual base salary and target annual cash bonus opportunity in connection with promotions in the ordinary course of business and consistent with past practice and market-levels of compensation for its employees. Any such increases for ChampionX executive officers would be subject to the approval of the Chief Executive Officer of SLB.

No New Management Arrangements

As of the date of this proxy statement/prospectus, neither ChampionX nor SLB has entered into any agreements, arrangements or understandings with ChampionX’s executive officers in connection with their employment following the consummation of the Merger.

No Section 280G Golden Parachute Excise Tax Gross-Ups

No ChampionX plan, policy, agreement or arrangement provides any employee, officer or director with the right to a tax “gross-up” payment in connection with any “golden parachute” or other tax liability triggered in connection with the Merger.

Summary of Payments and Benefits to ChampionX’s Named Executive Officers

This section sets forth the information required by Item 402(t) of Regulation S-K regarding the compensation of each of ChampionX’s named executive officers, that is based on or otherwise relates to the Merger and that will or may become payable to the ChampionX named executive officers at the completion of the Merger or on a Qualifying Termination of employment upon or following the consummation of the Merger. This compensation is referred to as “golden parachute” compensation by the applicable SEC disclosure rules, and in this section such term is used to describe the Merger-related compensation payable to the ChampionX named executive officers. The “golden parachute” compensation payable to these individuals is subject to a non-binding advisory vote of ChampionX stockholders. For information regarding the non-binding advisory vote on compensation, please see the section of this proxy statement/prospectus entitled “The ChampionX Special Meeting—Proposal 2: The Compensation Proposal.”

Except as otherwise specifically noted, the disclosure below uses the following assumptions: (i) the Effective Time occurred on April 21, 2024; (ii) each executive officer of ChampionX experienced a Qualifying Termination on April 21, 2024; (iii) each executive officer’s base salary rate and annual target bonus remain unchanged from that in effect as of the date of this proxy statement/prospectus; (iv) there is no vesting of ChampionX Equity Awards between the date hereof and the Effective Time; (v) the per share price of ChampionX common stock of $40.12 (which is calculated by multiplying the Exchange Ratio by $54.58, the average closing price of a share of SLB common stock over the first five business days following the first public announcement of the Merger); (vi) estimate of actual performance through the Effective Time for purposes of ChampionX Performance Share Awards with a performance period commencing as of January 1, 2022, is 200% of target performance (i.e., maximum performance); and (vii) estimate of actual performance through the Effective Time for purposes of payment of prorated annual bonus for the year in which the Effective Time occurs, payable under the terms of the Merger Agreement, is 100% of target performance.

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Some of the assumptions used in the table below are based upon information not currently available and, as a result, the actual amounts to be received by any of the individuals below may materially differ from the amounts set forth below.

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Indemnification and Insurance

The Merger Agreement provides that the directors and officers of ChampionX and its subsidiaries will have the right to indemnification and continued coverage under directors’ and officers’ liability insurance policies for at least six years following the Effective Time. Please see “The Merger Agreement —Indemnification and Insurance.”

Appraisal Rights

Under Delaware law (with respect to ChampionX stockholders) and the laws of Curaçao (with respect to SLB shareholders), neither ChampionX stockholders nor SLB shareholders will be entitled to appraisal rights or dissenters’ rights in connection with the Merger, the issuance of shares of SLB common stock in connection with the Merger, or the Transactions.

Restrictions on Sales of Shares of SLB Common Stock Received in the Merger

Shares of SLB common stock issued and delivered in the Merger will not be subject to any restrictions on transfer arising under the Securities Act or the Exchange Act, except shares of SLB common stock issued and delivered to any ChampionX stockholder who may be deemed to be an “affiliate” of SLB after the completion of the Merger. This proxy statement/prospectus does not cover resales of SLB common stock received by any person upon the completion of the Merger, and no person is authorized to make any use of this proxy statement/prospectus in connection with any resale.

Accounting Treatment

The Merger will be accounted for as an acquisition of a business. SLB will record net tangible and identifiable intangible assets acquired and liabilities assumed from ChampionX at their respective fair values at the date of the completion of the Merger. Any excess of the purchase price, over the fair value of the identifiable net assets of ChampionX, will be recorded as goodwill.

The financial condition and results of operations of SLB after completion of the Merger will reflect ChampionX’s balances and results after completion of the Merger but will not be restated retroactively to reflect the historical financial condition or results of operations of ChampionX. SLB’s earnings following the completion of the Merger will reflect acquisition accounting adjustments, including the effect of changes in the carrying value for assets and liabilities on depreciation and amortization expense.

Material U.S. Federal Income Tax Consequences

The following is a discussion of the material U.S. federal income tax consequences to Holders (as defined below) of (1) the exchange of their ChampionX common stock for SLB common stock in the Merger and (2) the ownership and disposition of SLB common stock received in the Merger. This discussion is based on the Code, existing and proposed Treasury regulations (the “Treasury Regulations”) promulgated under the Code, judicial

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decisions, published rulings, administrative pronouncements, and all other applicable authorities, all as in effect on the date of this proxy statement/prospectus and all of which are subject to change, possibly with retroactive effect. This discussion does not address any aspects of state, local, or non-U.S. laws or federal laws other than those relating to U.S. federal income taxation, is not a complete analysis or description of all of the possible tax consequences of the Merger or of the ownership or disposition of shares of SLB common stock, and does not address all tax considerations that may be relevant to a Holder in light of such Holder’s particular circumstances. No rulings are intended to be sought from the Internal Revenue Service (the “IRS”) with respect to the Merger, and there can be no assurance that the IRS or a court will not take a contrary position regarding the tax consequences described herein. This discussion addresses only Holders that own their shares of ChampionX common stock and will own their shares of SLB common stock as capital assets within the meaning of Section 1221 of the Code (generally, property held for investment purposes). This discussion does not address all aspects of U.S. federal income taxation that may be relevant to a Holder in light of such Holder’s particular circumstances, including any tax consequences arising under the unearned income Medicare contribution tax, or to a Holder that is subject to special treatment under U.S. federal income tax law, including, for example:

For purposes of this discussion, a “U.S. Holder” is any beneficial owner of ChampionX common stock or, after the completion of the Merger, SLB common stock that, for U.S. federal income tax purposes, is:

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A “Non-U.S. Holder” is any beneficial owner of ChampionX common stock or, after the completion of the Merger, SLB common stock that, for U.S. federal income tax purposes, is an individual, corporation, estate, or trust that is not a U.S. Holder.

As used in this discussion, a “Holder” means a U.S. Holder, a Non-U.S. Holder, or both, as the context may require.

If a partnership (including any entity or arrangement treated as a partnership for U.S. federal income tax purposes) holds ChampionX common stock or SLB common stock, the tax treatment of a partner in that partnership generally will depend on the status of the partner and the activities of the partnership. If you are a partner in a partnership that holds ChampionX common stock or SLB common stock, you are urged to consult your tax advisor regarding the U.S. federal income tax consequences to you of the Merger and the ownership and disposition of SLB common stock received in the Merger.

ALL HOLDERS OF CHAMPIONX COMMON STOCK ARE URGED TO CONSULT THEIR TAX ADVISORS REGARDING THE PARTICULAR FEDERAL, STATE, LOCAL, AND NON-U.S. TAX CONSEQUENCES TO THEM OF THE MERGER AND THE OWNERSHIP AND DISPOSITION OF SLB COMMON STOCK RECEIVED IN THE MERGER.

The Merger

General Tax Consequences to U.S. Holders

The exchange of ChampionX common stock for SLB common stock in the Merger will be a taxable transaction for U.S. federal income tax purposes. Therefore, subject to the discussion below relating to the potential application of Section 304 of the Code, a U.S. Holder will recognize capital gain or loss equal to the difference, if any, between (1) the sum of the fair market value of SLB common stock received by such Holder in the Merger and any cash received in lieu of fractional shares of ChampionX common stock, and (2) the U.S. Holder’s adjusted tax basis in its ChampionX common stock. A U.S. Holder’s adjusted tax basis in its ChampionX common stock will generally equal the Holder’s purchase price for such stock. ChampionX stockholders will receive no cash consideration, other than cash in lieu of fractional shares of SLB common stock, with which to pay any potential tax liability resulting from the Merger.

Capital gains of a non-corporate U.S. Holder will be eligible for the preferential U.S. federal income tax rates applicable to long-term capital gains if the U.S. Holder has held its ChampionX common stock for more than one year as of the date of the Merger. The deductibility of capital losses is subject to limitations. If a U.S. Holder acquired different blocks of shares of ChampionX common stock at different times or different prices, the U.S. Holder must determine its tax basis and holding period separately for each block of ChampionX common stock.

A U.S. Holder’s aggregate tax basis in SLB common stock received in the Merger will equal the fair market value of such stock as of the date of the Merger. A U.S. Holder’s holding period in SLB common stock received in the Merger will begin the day after the Merger.

General Tax Consequences to Non-U.S. Holders

Subject to the potential application of Section 304 of the Code discussed below, a Non-U.S. Holder generally will not be subject to U.S. federal income tax on any gain recognized on the exchange of ChampionX common stock for SLB common stock in the Merger unless:

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If the Non-U.S. Holder’s gain is described in the first bullet, then the Non-U.S. Holder will generally be subject to U.S. federal income tax under the rules described above as if it were a U.S. Holder of ChampionX common stock and, in the case of a foreign corporation, may be subject to an additional “branch profits tax” at a 30% rate (or such lower rate as may be specified by an applicable income tax treaty).

If the Non-U.S. Holder is described in the second bullet, then such Non-U.S. Holder will be subject to U.S. federal income tax at a 30% rate (or such lower rate as may be specified by an applicable income tax treaty) on the gain, which may be offset by certain U.S. source capital losses of the Non-U.S. Holder.

Regarding the third bullet, ChampionX does not believe that it is or has been a USRPHC within the past five years.

In any event, ChampionX stockholders will receive no cash consideration, other than cash in lieu of fractional shares of SLB common stock, with which to pay any potential tax liability resulting from the Merger.

Potential Application of Section 304 of the Code to the Merger

If Section 304 of the Code applies to the Merger, a Holder may be subject to U.S. federal income tax treatment that differs materially from that described above. Section 304 of the Code will apply to the Merger if holders of shares of ChampionX common stock, taken together, own (actually or constructively under attribution rules set forth in the Code) 50% or more of SLB, by vote or value, following the completion of the Merger, taking into account both shares of SLB common stock received in the Merger and shares of SLB common stock held at the time of the Merger. It may not be possible to establish with certainty following the closing of the Merger whether or not Section 304 of the Code applied to the Merger because the ownership information (including constructive ownership) necessary to make such determination may not be available. Based on the limited ownership information that is publicly available, it is possible that Section 304 of the Code could apply to the Merger.

All Holders of shares of ChampionX common stock that also own (including by attribution) shares of SLB common stock should consult their own tax advisors, including with respect to any actions that may be taken to mitigate the potential application of Section 304 of the Code.

If Section 304 of the Code applies to the Merger, the SLB common stock received by a Holder would be treated as the proceeds of a redemption of stock deemed issued by the indirect subsidiary of SLB. This deemed redemption would be treated as a distribution, unless the deemed redemption is “substantially disproportionate” or “not essentially equivalent to a dividend” with respect to a particular Holder, in which case the deemed redemption would be treated as a sale or exchange of shares. As a result, instead of recognizing taxable gain or loss as described above, a Holder of ChampionX common stock whose percentage ownership interest in ChampionX immediately after the Merger (including indirectly as a result of owning stock in SLB and taking into account any shares of SLB stock actually and constructively owned by such Holder prior to the Merger or otherwise acquired in connection with the Merger) is not lower than its percentage ownership interest in ChampionX prior to the Merger by an amount that satisfies certain tests may recognize dividend income in an amount up to the fair market value of the shares of SLB common stock received by such Holder in the Merger.

Whether the deemed redemption is treated as a distribution with respect to a Holder will depend upon the Holder’s particular circumstances. Under IRS published guidance, for a Holder who has a minimal percentage stock interest in ChampionX and who exercises no control over corporate affairs, such a Holder’s consideration received in the Merger would not be treated as a distribution so long as that holder experiences any reduction in

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its percentage stock interest, determined by comparing that holder’s percentage of ChampionX stock actually and constructively owned by that holder immediately prior to the Merger with the percentage of stock of ChampionX that is constructively owned (through actual and constructive ownership of SLB stock) immediately following the Merger. In that situation the receipt of SLB common stock in exchange for ChampionX common stock pursuant to the Merger would not be treated as a distribution but would instead be taxable as a sale or exchange with respect to such Holder, with the consequences to U.S. Holders and Non-U.S. Holders are described under “—General Tax Consequences to U.S. Holders” and “—General Tax Consequences to Non-U.S. Holders,” as applicable.

For a Holder that does not experience a reduction in its percentage stock interest as described above, if Section 304 does apply to the Merger such Holder’s consideration received in the Merger would be treated as a distribution. A distribution under Section 304 of the Code would be taxable as a dividend to a Holder to the extent of such Holder’s allocable share of the relevant current or accumulated earnings and profits, as described further below.

Holders who hold a material percentage of the outstanding ChampionX common stock, or who exercise managerial control over its corporate affairs, are subject to different rules that require a more significant reduction in percentage stock interest to avoid distribution treatment if Section 304 of the Code applies to the Merger. Any such Holders are urged to consult their own tax advisors regarding the potential application of Section 304 of the Code to the Merger in light of their particular circumstances.

For U.S. Holders, dividends are generally taxable as ordinary income. However, while there is no controlling authority, assuming certain holding period requirements are satisfied, a reduced U.S. federal income tax rate should be available for a dividend that a non-corporate U.S. Holder is deemed to receive under Section 304 of the Code. To the extent that a corporate U.S. Holder of ChampionX common stock is treated as having received a dividend as a result of Section 304 of the Code, such dividend may be eligible for a dividends received deduction (subject to certain requirements and limitations) and may be subject to the “extraordinary dividend” provisions of the Code.

The portion of any deemed distribution not paid out of the relevant current or accumulated earnings and profits would be applied against such U.S. Holder’s adjusted tax basis in its ChampionX common stock and thereafter would be treated as gain from the sale of such U.S. Holder’s ChampionX common stock.

For Non-U.S. Holders, the receipt of any amounts treated as a dividend generally will be subject to U.S. withholding tax at a 30% rate (or such lower rate as may be specified by an applicable income tax treaty), unless such dividend is effectively connected with a Non-U.S. Holder’s conduct of a trade or business within the United States (and, if an applicable income tax treaty so requires, is attributable to a U.S. permanent establishment or fixed place of business of the Non-U.S. Holder). However, because application of Section 304 of the Code to the Merger is uncertain and because the application of Section 304 of the Code depends on a Holder’s particular circumstances, a withholding agent may not be able to determine whether a Holder is treated as receiving a dividend for U.S. federal income tax purposes. Therefore, a withholding agent may withhold tax at a 30% rate (or such lower rate as may be specified by an applicable income tax treaty) on the full amount of the SLB common stock payable to a Non-U.S. Holder unless (1) the withholding agent has established special procedures allowing Non-U.S. Holders to certify that they are exempt from such withholding tax and (2) the Non-U.S. Holder is able to certify that the Non-U.S. Holder meets the requirements of such exemption (e.g., because the Non-U.S. Holder is not treated as receiving a dividend under the Section 302 tests described above). SLB and ChampionX intend to make available ownership certification forms that a Non-U.S. Holder may submit to a withholding agent as part of the letter of transmittal to establish non-dividend treatment. However, there can be no assurance that a withholding agent will establish or otherwise implement such special certification procedures. If a withholding agent determines it is required to withhold with respect to a Non-U.S. Holder, the withholding agent may retain and sell or cause to be sold the amount of SLB common stock otherwise payable to such Non-U.S. Holder as is necessary to satisfy any withholding with respect to such Non-U.S. Holder. In order to obtain a reduced rate of withholding under a tax treaty, a Non-U.S. Holder claiming such a reduced rate will be required to deliver a

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properly completed IRS Form W-8BEN or W-8BEN-E (or other applicable form) to the applicable withholding agent. In the event a withholding agent withholds excess amounts from the SLB common stock payable to a Non-U.S. Holder, the Non-U.S. Holder may generally obtain a refund of any such excess amounts by timely filing an appropriate claim with the IRS.

Section 304 of the Code and the Treasury regulations and guidance thereunder are complex. Any Holder that actually or constructively owns, or expects to own at the time of the Merger, both shares of ChampionX common stock and shares of SLB common stock should consult its own tax advisors with respect to the application of Section 304 of the Code in its particular circumstances (including as to its tax basis in the shares subject to Section 304 of the Code). In addition, all Non-U.S. Holders should consult their own tax advisors regarding their particular facts and circumstances, the procedures for claiming treaty benefits or otherwise establishing an exemption from U.S. withholding tax with respect to the SLB common stock payable to them pursuant to the Merger, and any actions that may be taken to mitigate any potential adverse tax consequences.

Information Reporting and Backup Withholding

SLB common stock received by a U.S. Holder or a Non-U.S. Holder in the Merger, under certain circumstances, may be subject to information reporting and backup withholding (currently at a 24% rate), unless such Holder provides proof of an applicable exemption or furnishes its taxpayer identification number and otherwise complies with all applicable requirements under the backup withholding rules. Any amounts withheld under the backup withholding rules are not additional tax and may be allowed as a refund or credit against the Holder’s U.S. federal income tax liability, provided that the required information is timely furnished to the IRS.

Ownership and Disposition of SLB Common Stock Received in the Merger

The following is a discussion of the U.S. federal income tax consequences of the ownership and disposition by U.S. Holders and Non-U.S. Holders of SLB common stock received in the Merger.

U.S. Holders

Distributions

Subject to the discussion below under “—Passive Foreign Investment Company Considerations,” distributions, if any, made with respect to shares of SLB common stock will constitute dividends for U.S. federal income tax purposes to the extent of SLB’s current-year or accumulated earnings and profits as determined for U.S. federal income tax purposes. The gross amount of dividends that a U.S. Holder receives generally will be subject to U.S. federal income taxation as dividend income and will not be eligible for the dividends-received deduction generally allowed to U.S. corporations. Subject to exceptions for short-term or hedged positions, non-corporate U.S. Holders will be subject to U.S. federal income taxation at reduced rates with respect to “qualified dividends.” Dividends paid by SLB on shares of SLB common stock will be treated as “qualified dividends” as long as (1) the SLB common stock is readily tradable on the NYSE and (2) SLB was not, in its taxable year prior to the year in which the dividend is paid, and is not, in its taxable year in which the dividend is paid, a passive foreign investment company, which we refer to as a PFIC. As described below, SLB believes that it has not been a PFIC in any prior year, will not be a PFIC for the taxable year in which the Merger occurs, and will not become a PFIC in the future.

To the extent that a distribution exceeds SLB’s current-year and accumulated earnings and profits as determined for U.S. federal income tax purposes, such distribution will be treated as a nontaxable return of capital to the extent of the U.S. Holder’s tax basis in the shares (with a corresponding reduction in such tax basis) and thereafter will be treated as capital gain. Such capital gain will be long-term capital gain if the U.S. Holder’s holding period for the SLB common stock exceeds one year.

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