EX-32.1 10 ex32112312024.htm EX-32.1
EXHIBIT 32.1
CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
In connection with the Annual Report on Form 10-K of Fiserv, Inc. (the “Company”) for the year ended December 31, 2024 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), Frank J. Bisignano, as Chairman and Chief Executive Officer of the Company, and Robert W. Hau, as Chief Financial Officer of the Company, each hereby certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that to the best of his knowledge:
(1)The Report fully complies with the requirements of Section 13(a) of the Securities Exchange Act of 1934; and
(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

| By: | /s/ Frank J. Bisignano
|  | Frank J. Bisignano
|  | Chairman and Chief Executive Officer
|  | February 20, 2025
| By: | /s/ Robert W. Hau
|  | Robert W. Hau
|  | Chief Financial Officer
|  | February 20, 2025