Press releases

• Thursday, February 16, 2012

  ACI Worldwide Announces Final Results of Exchange Offer

  (New York, N.Y. – February 16, 2012) – ACI Worldwide, Inc. (Nasdaq: ACIW), a leading international provider of payment systems, today announced the final results of its exchange offer to acquire S1 Corporation (Nasdaq: SONE), which expired at 5:00 p.m., Eastern time, on February 10, 2012. Based on the final calculation performed by Wells Fargo, the exchange agent for the exchange offer, a total of 51,956,479 shares of S1 common stock were validly tendered, representing approximately 93.6% of S1’s outstanding shares.

• Tuesday, February 14, 2012

  ACI Worldwide, Inc. Reports Financial Results for the Quarter and Year Ended December 31, 2011

  (NEW YORK — February 14, 2012) — ACI Worldwide, Inc. (NASDAQ:ACIW), a leading international provider of payment systems, today announced financial results for the period ended December 31, 2011. We will hold a conference call on February 14, 2012, at 8:30 a.m. EST to discuss this information. Interested persons may also access a real-time audio broadcast of the teleconference at www.aciworldwide.com/investors.

• Monday, February 13, 2012

  ACI Worldwide Announces Preliminary Results of Exchange Offer

  (New York, N.Y. – February 13, 2012) – ACI Worldwide, Inc. (Nasdaq: ACIW), a leading international provider of payment systems, today announced the preliminary results of its exchange offer to acquire S1 Corporation (Nasdaq: SONE), which expired at 5:00 p.m., Eastern time, on February 10, 2012. Based on the preliminary calculation performed by Wells Fargo, the exchange agent for the exchange offer, a total of 52,871,149 shares of S1 common stock were validly tendered, which includes 3,073,394 shares tendered through notice of guaranteed delivery, and not withdrawn, representing approximately 95.3% of S1’s outstanding shares.

• Monday, February 13, 2012

  ACI Worldwide completes acquisition of S1 Corporation

  (New York, N.Y. – February 13, 2012) – ACI Worldwide, Inc. (Nasdaq: ACIW), a leading international provider of payment systems, today announced that it has accepted for payment all shares of S1 Corporation (Nasdaq: SONE) common stock tendered in the previously announced exchange offer.

• Friday, February 03, 2012

  ACI Worldwide and S1 Corporation Announce the DOJ is closing its investigation

  NEW YORK and NORCROSS, Ga., February 3, 2012 – ACI Worldwide, Inc. (Nasdaq: ACIW) and S1 Corporation (Nasdaq: SONE) today announced that the U.S. Department of Justice (the “DOJ”) has informed them that the DOJ is closing its investigation in connection with the proposed acquisition of S1 by ACI. As previously announced, the expiration date of ACI’s exchange offer for all of S1’s outstanding common shares is 5:00 p.m., Eastern time, on Friday, February 10, 2012.

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