Initial Statement of Beneficial Ownership (Form 3)

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * NELSON ERIC CHRISTIAN 2. Date of Event Requiring Statement (Month/Day/Year) 10/01/2026 3. Issuer Name and Ticker or Trading Symbol FISERV INC [FISV] (Last) (First) (Middle) 600 N. VEL R. PHILLIPS AVENUE 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) EVP and Chief Legal Officer 5. If Amendment, Date Original Filed (Month/Day/Year) (Street) MILWAUKEE, WI 53203 6. Individual or Joint/Group Filing (Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5) Common Stock 70,863(1) D

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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Employee Stock Option (right to buy)	02/22/2020(2)	02/22/2027	Common Stock	936	$56.91	D
Employee Stock Option (right to buy)	02/21/2021(3)	02/21/2028	Common Stock	4,466	$69.9	D
Employee Stock Option (right to buy)	02/20/2022(4)	02/20/2029	Common Stock	3,166	$84.73	D
Employee Stock Option (right to buy)	02/26/2024(5)	02/26/2030	Common Stock	3,920	$112.87	D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
NELSON ERIC CHRISTIAN 600 N. VEL R. PHILLIPS AVENUE MILWAUKEE, WI 53203			EVP and Chief Legal Officer

Signatures

/s/ Eric Christian Nelson		10/01/2026
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Includes 39,883 unvested restricted stock units 1,525 of which will vest on 2/21/27; 3,807 of which will vest on 6/15/2027; 1,050 and 1,052 of which will respectively vest on 2/7/27 and 2/7/28; 4,891 of which will vest in increments of one-third on each of 11/18/2026, 11/18/2027, and 11/18/2028; 11,903 of which will vest in increments of one-third on each of 2/18/2027, 2/18/2028, and 2/18/2029; and 15,655 of which will vest in increments of one-third on each of 6/15/2027, 6/15/2028, and 6/15/2029.
(2)	The option vested in three equal installments on each of 2/22/18, 2/22/19, and 2/22/20.
(3)	The option vested in three equal installments on each of 2/21/19, 2/21/20, and 2/21/21.
(4)	The option vested in three equal installments on each of 2/20/20, 2/20/21, and 2/20/22.
(5)	The option vested in four equal installments on each of 2/26/21, 2/26/22, 2/26/23, and 2/26/24.

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