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INVESTOR ALERT: Pomerantz law Firm reminds investors with losses on their investment in ChampionX Corporation of class action lawsuit and upcoming deadlines - CHX. Jun 04, 2026, 10:00 ET NEW YORK, June 4, 2026 /PRNewswire/ - Pomerantz LLP announces that a class action lawsuit has been filed against ChampionX Corporation ("ChampionX" or the "Company") (NASDAQ: CHX). Such investors are advised to contact Danielle Peyton at [email protected] or 646-581-9980, (or 888.4-POMLAW), toll-free, Ext. 7980. Those who inquire by e-mail are encouraged to include their mailing address, telephone number, and the number of shares purchased. The class action concerns whether ChampionX and certain of its officers and/or directors have engaged in securities fraud or other unlawful business practices. You have until July 14, 2026, to ask the Court to appoint you as Lead Plaintiff for the class if you purchased or otherwise acquired ChampionX securities during the Class Period. A copy of the Complaint can be obtained at www.pomerantzlaw.com. A Complaint has filed on behalf of investors who sold ChampionX common stock during the Class Period, alleging that the defendants failed to disclose material information, which artificially deflated the price of ChampionX common stock. Per the allegations of the Complaint, on February 29, 2024, ChampionX received an unsolicited non-public offer from Schlumberger Limited to purchase all the outstanding shares of ChampionX for $36.70 per share. On March 7, 2024, Schlumberger raised its offer to $37.80 per share. The ChampionX class action lawsuit alleges that while these offers were on the table and unknown to the investing public, ChampionX was repurchasing its common stock at market prices significantly below the prices offered by Schlumberger. ChampionX had an obligation to disclose that it had received a formal acquisition offer from Schlumberger or abstain from purchasing ChampionX stock from unsuspecting investors. During the Class Period, ChampionX's average stock price was $33.32 per share. On Tuesday, April 2, 2024, during pre-market hours, ChampionX disclosed the merger with Schlumberger. The merger eventually closed on July 16, 2025, with Schlumberger acquiring ChampionX for $40.58 per share. Pomerantz LLP, with offices in New York, Chicago, Los Angeles, London, Paris, and Tel Aviv, is acknowledged as one of the premier firms in the areas of corporate, securities, and antitrust class litigation. Founded by the late Abraham L. Pomerantz, known as the dean of the class action bar, Pomerantz pioneered the field of securities class actions. Today, more than 85 years later, Pomerantz continues in the tradition he established, fighting for the rights of the victims of securities fraud, breaches of fiduciary duty, and corporate misconduct. The Firm has recovered numerous multimillion-dollar damages awards on behalf of class members. See www.pomlaw.com. Attorney advertising. Prior results do not guarantee similar outcomes. Danielle Peyton Pomerantz LLP 646-581-9980 ext. 7980 SOURCE Pomerantz LLP

Bronstein, Gewirtz & Grossman LLC urges ChampionX Corporation investors to act: Class Action filed alleging investor harm. Nationally recognized firm urges ChampionX Investors to explore Class Action representation. NEW YORK, May 21, 2026 (GLOBE NEWSWIRE) - Bronstein, Gewirtz & Grossman, LLC, a nationally recognized investor-rights law firm, announces that a class action lawsuit has been filed against ChampionX Corporation (NASDAQ: CHX) and certain of its officers. "Our practice focuses on restoring investor capital and ensuring corporate accountability to uphold market integrity," said Peretz Bronstein. This lawsuit seeks to recover damages against Defendants for alleged violations of the federal securities laws on behalf of all persons and entities that purchased or otherwise acquired ChampionX securities between February 29, 2024 and April 1, 2024, both dates inclusive (the "Class Period"). Such investors are encouraged to join this case by visiting the firm's site: bgandg.com/CHX. ChampionX Case Details The Complaint alleges that, throughout the Class Period, Defendants made materially false and misleading statements and/or failed to disclose that: (1) while repurchasing millions of dollars' worth of ChampionX Corporation ("ChampionX" or the "Company") common stock, Defendants were in possession of material nonpublic information regarding offers made by Schlumberger Limited ("SLB") to acquire ChampionX at a premium to prevailing market prices; (2) Defendants failed to either abstain from trading or disclose SLB's offer(s), which, if disclosed, would have signaled to investors that ChampionX's stock was worth significantly more than its trading price; (3) Defendants further failed to disclose subsequent offers and negotiations involving ChampionX and SLB; and (4) as a result, Defendants' statements about the Company's business, operations, and prospects were materially false and misleading at all relevant times. What's Next for ChampionX Investors? A class action lawsuit has already been filed. If you wish to review a copy of the Complaint, you can visit the firm's site: bgandg.com/CHX. or you may contact Peretz Bronstein, Esq. or his Client Relations Manager, Nathan Miller, of Bronstein, Gewirtz & Grossman, LLC at 917-590-0911. If you suffered a loss in ChampionX you have until July 14, 2026, to request that the Court appoint you as lead plaintiff. Your ability to share in any recovery doesn't require that you serve as lead plaintiff. No Cost to ChampionX Investors We, Bronstein, Gewirtz & Grossman LLC, represent investors in class actions on a contingency fee basis. That means we will ask the court to reimburse us for out-of-pocket expenses and attorneys' fees, usually a percentage of the total recovery, only if we are successful. Why Bronstein, Gewirtz & Grossman, LLC for ChampionX Securities Class Action? Bronstein, Gewirtz & Grossman, LLC is a nationally recognized firm that represents investors in securities fraud class actions and shareholder derivative suits. Our firm has recovered hundreds of millions of dollars for investors nationwide. More at www.bgandg.com "Our practice centers on restoring investor capital and ensuring corporate accountability, which serves to uphold the essential integrity of the marketplace," said Peretz Bronstein, Founding Partner of Bronstein, Gewirtz & Grossman, LLC. Contact Info Peretz Bronstein, Esq. or Nathan Miller Bronstein, Gewirtz & Grossman, LLC 917-590-0911 | [email protected] Attorney advertising. Prior results do not guarantee similar outcomes.

CHX investors have opportunity to lead ChampionX Corporation securities fraud lawsuit with the Schall Law Firm. May 19, 2026 21:22 ET | Source: Schall Law LOS ANGELES, May 19, 2026 (GLOBE NEWSWIRE) - The Schall Law Firm, a national shareholder rights litigation firm, reminds investors of a class action lawsuit against ChampionX Corporation ("ChampionX" or "the Company") (NASDAQ: CHX) for violations of §§10(b) and 20(a) of the Securities Exchange Act of 1934 and Rule 10b-5 promulgated thereunder by the U.S. Securities and Exchange Commission. Investors who purchased the Company's securities between February 29, 2024 and April 1, 2024, inclusive (the "Class Period"), are encouraged to contact the firm before July 14, 2026. We also encourage you to contact Brian Schall of the Schall Law Firm, 2049 Century Park East, Suite 2460, Los Angeles, CA 90067, at 310-301-3335, to discuss your rights free of charge. You can also reach us through the firm's website at www.schallfirm.com, or by email at [email protected]. The class, in this case, has not yet been certified, and until certification occurs, you are not represented by an attorney. If you choose to take no action, you can remain an absent class member. According to the Complaint, the Company made false and misleading statements to the market. ChampionX purchased millions of dollars worth of its own shares while in possession of material nonpublic information about offers made by Schlumberger Limited ("SLB") to acquire it at a premium. The Company failed to disclose negotiations with SLB. Based on these facts, the Company's public statements were false and materially misleading throughout the class period. When the market learned the truth about ChampionX, investors suffered damages. The Schall Law Firm represents investors around the world and specializes in securities class action lawsuits and shareholder rights litigation. The Schall Law Firm