JANA Partners takes new stake in Fiserve, exits position in Trimble

JANA Partners disclosed in an SEC filing its holdings as of December 31, 2025. JANA’s one new buy during the fourth quarter was Fiserv (FISV). JANA exited one position during the quarter, Trimble (TRMB). JANA increased its stake in a number of holdings, including by size of previous position, Cooper Companies (COO), Alkami Technology (ALKT), Rapid7 (RPD), and Six Flags (FUN). JANA reduced its stake in four holdings, including by size of previous position, Markel Group (MKL), Mercury Systems (MRCY), Freshpet (FRPT), and Enhabit (EHAB). JANA’s top holdings as of December 31, 2025, in order of size, were Mercury Systems, Cooper Companies, Lamb Weston (LW), and Market Group.