Press Release

ACI Worldwide, Inc. Reports Financial Results for the Quarter Ended March 31, 2011

April 28, 2011

"First quarter sales and backlog growth over prior-year quarter continues to demonstrate the appeal of ACI's strategy and product solutions suite as we increase the number of new payment applications owned by each of our existing customers. The company is executing better quarterly performance as underscored by our growth in operating income and improvement in operating EBITDA," said Chief Executive Officer Philip Heasley.

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Investor Contacts

John Kraft, Head of Strategy & Finance
Email: john.kraft@aciworldwide.com

Global Headquarters:
ACI Worldwide
2811 Ponce de Leon Blvd, PH1
Coral Gables, FL 33134