SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

Filed by the Registrant ☒        Filed by a Party other than the Registrant ☐

Check the appropriate box:

ACI WORLDWIDE, INC.

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check all boxes that apply):

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								Meeting Materials: Notice of Meeting and Proxy
								Statement & Annual Report
ACI Worldwide, Inc.   Annual Meeting of Stockholders								Important Notice Regarding the Availability of Proxy Materials for the Stockholders Meeting To Be Held On June 4, 2024 For Stockholders of record as of April 9, 2024
Tuesday, June 4, 2024 11:00 AM, Eastern Time								To order paper materials, use one of the following methods.
Annual Meeting to be held live via the Internet - please visit www.proxydocs.com/ACIW for more details.
You must register to attend the meeting online and/or participate at www.proxydocs.com/ACIW
								Internet:
								www.investorelections.com/ACIW
For a convenient way to view proxy materials, VOTE, and obtain directions to attend the meeting go to www.proxydocs.com/ACIW
To vote your proxy while visiting this site, you will need the 12 digit control number in the box below.
								Call:
								1-866-648-8133
This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. This is not a ballot. You cannot use this notice to vote your shares. We encourage you to access and review all of the important information contained in the proxy materials before voting.
								Email:
								paper@investorelections.com
Under United States Securities and Exchange Commission rules, proxy materials do not have to be delivered in paper. Proxy materials can be distributed by making them available on the Internet.
								* If requesting material by e-mail, please send a blank e-mail with the 12 digit control number (located below) in the subject line. No other requests, instructions OR other inquiries should be included with your e-mail requesting material.
If you want to receive a paper or e-mail copy of the proxy material, you must request one. There is no charge to you for requesting a copy. In order to receive a paper package in time for this year's meeting, you must make this request on or before May 24, 2024.
								Your control number
								Have the 12 digit control number located in the
								box above available when you access the
								website and follow the instructions.
SEE REVERSE FOR FULL AGENDA

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		ACI Worldwide, Inc. Annual Meeting of Stockholders

THE BOARD OF DIRECTORS RECOMMENDS A VOTE:

FOR ALL NOMINEES FOR DIRECTOR ON PROPOSAL 1, AND FOR PROPOSALS 2 AND 3

1.01 Adalio T. Sanchez

1.02 Juan A. Benitez

1.03 Janet O. Estep

1.04 Mary P. Harman

1.05 Katrinka B. McCallum

1.06 Charles E. Peters, Jr.

1.07 Thomas W. Warsop III

1.08 Samir M. Zabaneh