Exhibit 21.01
SUBSIDIARIES OF THE REGISTRANT
The following is a list of subsidiaries of ACI Worldwide, Inc., omitting subsidiaries which, considered in the aggregate as a single subsidiary, would not constitute a significant subsidiary as of December 31, 2015
| ACI Australia Pty. Ltd | Australia | |
| ACI Worldwide (Pacific) Pty. Ltd. | Australia | |
| Distra Pty. Ltd | Australia | |
| ACI Worldwide (Canada), Inc. | Canada | |
| ACI Worldwide Colombia S.A.S. | Colombia | |
| Official Payments Corporation | Delaware | |
| ACI Worldwide (eps) AG | Germany | |
| ACI Worldwide Solutions Private Limited | India | |
| Applied Communications GPC Limited | Ireland | |
| Applied Communications (Ireland) Limited | Ireland | |
| ACI Worldwide (Italia) S.R.L. | Italy | |
| ACI Worldwide (Luxembourg) S.a.r.l. | Luxembourg | |
| ACI Worldwide Corp. | Nebraska | |
| ACI Worldwide B.V. | Netherlands | |
| ACI Worldwide (Asia) Pte. Ltd. | Singapore | |
| ACI Worldwide (South Africa) (Pty.) Ltd. | South Africa | |
| ACI Worldwide Cornastone (Proprietary) Ltd. | South Africa | |
| PM Systems Corporation | South Carolina | |
| ACI Global Limited | United Kingdom | |
| Applied Communications Inc. U.K. Holding Limited | United Kingdom | |
| ACI Worldwide (EMEA) Limited | United Kingdom | |
| S1 International IP Holding Limited | United Kingdom |
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