Philadelphia, Pennsylvania--(Newsfile Corp. - January 2, 2026) - National plaintiffs' law firm Berger Montague PC announces a class action lawsuit has been filed against Fiserv, Inc. (NASDAQ: FISV) (NYSE: FI) ("Fiserv" or the "Company") on behalf of investors who purchased Fiserv shares during the period of July 23, 2025 through October 29, 2025 (the "Class Period").Investor Deadline: Investors who purchased Fiserv securities during the Class Period may, no later than January 5, 2026, seek to be appointed ...