Fiserv (FI) director Mamilli defers $37,500 into 673 stock-linked units

Rhea-AI Filing Summary

Mamilli Wafaa reported acquisition or exercise transactions in this Form 4 filing.

Fiserv Inc. director Wafaa Mamilli received 673 Deferred Compensation Notional Units tied to Fiserv common stock as a compensation grant. The units were credited on March 31, 2026 under the Non-Employee Director Deferred Compensation Plan in respect of $37,500 of deferred director fees, using the $55.80 closing share price.

Each notional unit represents one share of Fiserv common stock to be delivered after Mamilli’s service with the company ends, increasing her deferred units balance to 1,875. This is a compensation-related award, not an open-market stock purchase.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Mamilli Wafaa

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Deferred Compensation Notional Units	673	$55.80	$38K

Holdings After Transaction: Deferred Compensation Notional Units — 1,875 shares (Direct)

Footnotes (1)

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Key Figures

Deferred units granted: 673 units Closing share price: $55.80 per share Deferred compensation amount: $37,500 +1 more

4 metrics

Deferred units granted 673 units Deferred Compensation Notional Units credited March 31, 2026

Closing share price $55.80 per share Fiserv common stock closing price on March 31, 2026

Deferred compensation amount $37,500 Director fees deferred into notional units under the Plan

Units after transaction 1,875 units Total Deferred Compensation Notional Units following the grant

Key Terms

Deferred Compensation Notional Units, Non-Employee Director Deferred Compensation Plan, deferred compensation, notional units

4 terms

Deferred Compensation Notional Units financial

"These deferred compensation notional units were allocated under the Fiserv, Inc. Non-Employee Director Deferred Compensation Plan"

Non-Employee Director Deferred Compensation Plan financial

"allocated under the Fiserv, Inc. Non-Employee Director Deferred Compensation Plan (the "Plan")"

deferred compensation financial

"director fees otherwise payable in cash may be deferred in exchange for the allocation of notional units"

Deferred compensation is pay that employees or executives have earned now but will receive at a later date, such as delayed bonuses, retirement benefits, or stock grants. It matters to investors because it creates future obligations and shapes incentives—like a promise to pay later that can affect a company’s reported profits, cash needs and potential stock dilution—so it helps signal how a business manages costs and retains key people.

notional units financial

"allocation of notional units under the Plan"

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Mamilli Wafaa

(Last) (First) (Middle)

600 N. VEL R. PHILLIPS AVENUE

(Street)

MILWAUKEE WISCONSIN 53203

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
FISERV INC [ FISV ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/31/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Deferred Compensation Notional Units	(1)	03/31/2026		A		673		(1)	(1)	Common Stock	673	$55.8(1)	1,875	D

Explanation of Responses:

1. These deferred compensation notional units were allocated under the Fiserv, Inc. Non-Employee Director Deferred Compensation Plan (the "Plan"), under which director fees otherwise payable in cash may be deferred in exchange for the allocation of notional units under the Plan. This Form 4 reports the crediting of units under the Plan on March 31, 2026, in respect of $37,500 of deferred compensation. The number of notional units credited is calculated by dividing the amount of compensation that is deferred by the closing price of the company's common stock on the date of deferral, or last business day prior. On March 31, 2026, the closing price of Fiserv's common stock was $55.80 per share. Following cessation of the reporting person's service to the company, each notional unit will be settled in shares of Fiserv common stock on a one-for-one basis.

Remarks:

	/s/ Eric C. Nelson (attorney-in-fact)	04/02/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What did FI director Wafaa Mamilli report in this Form 4 filing?

Wafaa Mamilli reported receiving 673 Deferred Compensation Notional Units as a compensation grant. These units were credited under Fiserv’s Non-Employee Director Deferred Compensation Plan instead of taking $37,500 of director fees in cash on March 31, 2026.

How were the 673 notional units for FI calculated for Wafaa Mamilli?

The 673 notional units were calculated by dividing $37,500 of deferred director compensation by Fiserv’s $55.80 closing common stock price. That closing price on March 31, 2026 determined how many notional units were credited under the deferred compensation plan.

Are Wafaa Mamilli’s 673 FI notional units an open-market stock purchase?

No, the 673 notional units are a compensation-related grant, not an open-market stock purchase. They reflect director fees deferred into the Fiserv Non-Employee Director Deferred Compensation Plan rather than cash, based on the company’s March 31, 2026 closing share price.

When will Wafaa Mamilli receive FI shares for these notional units?

Each deferred compensation notional unit will be settled in one share of Fiserv common stock after Mamilli’s service with the company ends. The plan provides one-for-one settlement in shares upon cessation of service, turning the accumulated notional units into actual stock.

How many FI notional units does Wafaa Mamilli hold after this transaction?

After this transaction, Mamilli holds 1,875 Deferred Compensation Notional Units. The 673 new units credited on March 31, 2026 were added to her prior balance, increasing the total deferred units that will eventually be settled in Fiserv common stock.