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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 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 * SUWINSKI JAN   2. Issuer Name and Ticker or Trading Symbol ACI WORLDWIDE, INC. [ACIW] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 3520 KRAFT ROAD, SUITE 300 3. Date of Earliest Transaction (Month/Day/Year) 05/30/2018 (Street) NAPLES, FL 34105 4. If Amendment, Date Original Filed(Month/Day/Year) 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 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 Common Stock 05/30/2018   M   30,000 A $ 5.04 166,896 D   Common Stock 05/30/2018   S   30,000 D $ 24.1942 (1) 136,896 D   Common Stock 05/31/2018   M   7,714 A $ 6.1033 144,610 D   Common Stock 05/31/2018   S   7,714 D $ 24.301 (2) 136,896 D   Common Stock 05/31/2018   M   13,500 A $ 6.1033 150,396 D   Common Stock 05/31/2018   S   13,500 D $ 24.4931 (3) 136,896 D   Common Stock 06/01/2018   M   8,786 A $ 6.1033 145,682 D   Common Stock 06/01/2018   S   8,786 D $ 24.5556 (4) 136,896 D   Common Stock 06/01/2018   M   15,000 A $ 9.6667 151,896 D   Common Stock 06/01/2018   S   15,000 D $ 24.6457 (5) 136,896 D

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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 Underlying Securities (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 of Derivative Security: 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

Non-Qualified Stock Option (right to buy)

$ 5.04

05/30/2018

M

30,000

(6)

06/10/2019

Common Stock

30,000

$ 0

0

D

Non-Qualified Stock Option (right to buy)

$ 6.1033

05/31/2018

M

7,714

(6)

06/09/2020

Common Stock

7,714

$ 0

22,286

D

Non-Qualified Stock Option (right to buy)

$ 6.1033

05/31/2018

M

13,500

(6)

06/09/2020

Common Stock

13,500

$ 0

8,786

D

Non-Qualified Stock Option (right to buy)

$ 6.1033

06/01/2018

M

8,786

(6)

06/09/2020

Common Stock

8,786

$ 0

0

D

Non-Qualified Stock Option (right to buy)

$ 9.6667

06/01/2018

M

15,000

(6)

06/15/2021

Common Stock

15,000

$ 0

15,000

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
SUWINSKI JAN 3520 KRAFT ROAD SUITE 300 NAPLES, FL 34105	X

Signatures

By: Dennis Byrnes, Attorney in Fact For: Jan H. Suwinski		06/01/2018
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	The sale price ranged from $24.16 to $24.22, with a weighted average sale price of $24.194242. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
(2)	The sale price ranged from $24.30 to $24.32, with a weighted average sale price of $24.300952. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
(3)	The sale price ranged from $24.40 to $24.53, with a weighted average sale price of $24.493058. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
(4)	The sale price ranged from $24.50 to $24.64, with a weighted average sale price of $24.555629. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
(5)	The sale price ranged from $24.585 to $24.70, with a weighted average sale price of $24.645747. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
(6)	The options were granted pursuant to the ACI Worldwide, Inc. 2005 Equity and Performance Incentive Plan.
Remarks: Mr. Suwinski is not standing for re-election to the ACI Worldwide, Inc. Board of Directors.  The options reported herein would otherwise expire within 90 days after the 2018 annual meeting of stockholders.

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