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    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		18
    CONFORMED PERIOD OF REPORT:	20210602
    FILED AS OF DATE:		20210416
    DATE AS OF CHANGE:		20210416

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			ACI WORLDWIDE, INC.
    		CENTRAL INDEX KEY:			0000935036
    		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-PREPACKAGED SOFTWARE [7372]
    		IRS NUMBER:				470772104
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

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    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	000-25346
    		FILM NUMBER:		21830039

    	BUSINESS ADDRESS:
    		STREET 1:		3520 KRAFT ROAD, SUITE 300
    		CITY:			NAPLES
    		STATE:			FL
    		ZIP:			34105
    		BUSINESS PHONE:		239-403-4600

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    		STREET 1:		3520 KRAFT ROAD, SUITE 300
    		CITY:			NAPLES
    		STATE:			FL
    		ZIP:			34105

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	TRANSACTION SYSTEMS ARCHITECTS INC
    		DATE OF NAME CHANGE:	19950109
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