What triggered the ACIW CFO’s tax-related share surrender reported on Form 4?

The surrender was triggered by the vesting of 6,854 shares tied to restricted stock units granted on September 24, 2025. A portion of these vested shares was relinquished to satisfy the associated tax liability.

ACIW CFO surrenders shares for tax on RSU vesting

ACI Worldwide, Inc. Chief Financial Officer Robert William Leibrock reported a disposition of 2,148 shares of Common Stock on March 24, 2026.

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Rhea-AI Filing Summary

ACI Worldwide, Inc. Chief Financial Officer Robert William Leibrock reported a disposition of 2,148 shares of Common Stock on March 24, 2026. These shares were surrendered to the company to satisfy tax obligations arising from the vesting of 6,854 restricted stock units. Following this tax-related share surrender, he directly holds 209,549 shares of ACI Worldwide common stock.

Insider Trade Summary

Disposition: 2,148 shares

Disposition 1 txn

Insider Leibrock Robert William

Role Chief Financial Officer

Type	Security	Shares	Price	Value
Disposition	Common Stock	2,148	$39.86	$86K

Holdings After Transaction: Common Stock — 209,549 shares (Direct)

Footnotes (1)

F1. Represents shares surrendered by the reporting person to pay the tax liability due upon the vesting of 6,854 shares, representing one twelfth of the restricted stock units granted on September 24, 2025.

FAQ

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What insider transaction did ACIW CFO Robert Leibrock report on this Form 4?

CFO Robert William Leibrock reported surrendering 2,148 ACIW common shares to the issuer. The shares were used to cover tax liabilities triggered by restricted stock unit vesting, rather than being sold in the open market.

Was the ACIW CFO’s March 24, 2026 transaction an open-market sale of shares?

No. The transaction reflects 2,148 shares surrendered back to ACI Worldwide to pay taxes on vested restricted stock units. It was a disposition to the issuer, not an open-market sale or discretionary trading activity.

How many ACIW shares did the CFO retain after the reported disposition?

After surrendering 2,148 shares to cover tax obligations, the CFO directly holds 209,549 ACI Worldwide common shares. This indicates the transaction affected only a small portion of his overall reported share position.

Does the ACIW Form 4 mention any Rule 10b5-1 trading plan for this transaction?

No Rule 10b5-1 trading plan is mentioned in the available details. The filing instead describes a routine tax-related disposition to the issuer connected to restricted stock unit vesting, not a pre-planned market trading program.

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Accepted by SEC EDGAR 03/25/2026 - 05:24 PM EDT

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^*

Leibrock Robert William

(Last)

(First)

(Middle)

6060 COVENTRY DRIVE

(Street)

ELKHORN

NEBRASKA

68022

(City)

(State)

(Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
ACI WORLDWIDE, INC. [ ACIW ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/24/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	03/24/2026		D		2,148⁽¹⁾	D	$39.86	209,549	D

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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. Represents shares surrendered by the reporting person to pay the tax liability due upon the vesting of 6,854 shares, representing one twelfth of the restricted stock units granted on September 24, 2025.

Remarks:

	Robert William Leibrock	03/25/2026
	** 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)

Source: View Original Filing on SEC EDGAR