Investors File Lawsuits Saying ChampionX Hid Schlumberger Offers While Buying Back Stock

Overview

• Three plaintiffs' firms publicly filed or announced class actions on May 21–22, 2026 that target ChampionX and some executives for share repurchases during a short window in early 2024.
• The complaints say ChampionX received unsolicited offers from Schlumberger on February 29 and March 7, 2024 and repurchased shares while that information was not public.
• Robbins LLP's notice cites about 216,000 shares repurchased during the alleged class period and other filings cite average trading prices near $33.32 versus the reported offer prices of $36.70 and $37.80.
• Plaintiffs say those buybacks at lower market prices harmed investors who sold then and point to the April 2, 2024 public merger disclosure and the July 16, 2025 closing at $40.58 as evidence of higher value that sellers missed.
• The litigation is in an early stage and investors who sold between February 29 and April 1, 2024 have until July 14, 2026 to move to be appointed lead plaintiff, with key questions to be decided in pleadings and discovery about disclosure duties and investor harm.