X0306 4 2022-02-23 0 0000798354 FISERV INC FISV 0001654667 Chiarello Guy 255 FISERV DRIVE BROOKFIELD WI 53045 0 1 0 0 Chief Operating Officer Common Stock 2022-02-23 4 A 0 40497 0.00 A 219720 D Common Stock 26118 I By Trust Common Stock 37381 I By Trust One-third of these restricted stock units vest on each anniversary of the grant date. Held by The Guy Chiarello 2020 Trust for the benefit of the reporting person's spouse and children and of which the reporting person's spouse serves as trustee and the reporting person serves as investment advisor. Held by The Denise Chiarello 2021 Trust for the benefit of the reporting person and the reporting person's children and of which the reporting person serves as trustee. /s/ Eric C. Nelson (attorney-in-fact) 2022-02-25