PHILADELPHIA, July 07, 2026 (GLOBE NEWSWIRE) -- National plaintiffs’ law firm Berger Montague PC announces a class action lawsuit against ChampionX Corporation (NASDAQ: CHX) (“ChampionX” or the “Company”) on behalf of investors who sold ChampionX common stock during the period from February 29, 2024 through April 1, 2024 (the “Class Period”).