================================================================================ UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 26, 2006 S1 Corporation (Exact name of registrant as specified in its charter) Delaware 000-24931 58-2395199 (State or other jurisdiction (Commission (IRS Employer of incorporation) File Number) Identification No.) 35000 Lenox Road, Suite 200, Atlanta, Georgia 30326 (Address of principal executive offices) (Zip code) Registrant's telephone number, including area code: (404) 923-3500 Not Applicable (Former name or former address, if changed since last report) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: [ ] Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) [ ] Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) [ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) [ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Rule 425, Rule 14a-12 and Instruction 2 to Rule 14d-2(b)(2) ================================================================================ ITEM 2.02. RESULTS OF OPERATIONS AND FINANCIAL CONDITION. On April 26, 2006, S1 Corporation ("S1") issued a press release announcing the results of operations for the first quarter ended March 31, 2006. That press release is furnished as Exhibit 99.1 to this report. Also on April 26, 2006 at 5:30 p.m., S1 held a conference call during which S1 discussed its first quarter results. A transcript of the conference call is furnished as Exhibit 99.2 to this report. A live webcast of the call will be available through S1's website, www.s1.com. A replay of the conference call will be available through May 2, 2006 on S1's website. ITEM 9.01 FINANCIAL STATEMENTS AND EXHIBITS (a) Not applicable. (b) Not applicable. (c) Not applicable. (d) Exhibits. Exhibit No. Description - ----------- --------------------------------------------------- 99.1 Press release dated April 26, 2006. 99.2 Transcript of conference call held April 26, 2006. SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. S1 CORPORATION (Registrant) /s/ Richard P. Dobb ------------------------------- Richard P. Dobb Vice President, General Counsel and Secretary Date: April 26, 2006 EXHIBIT INDEX Exhibit No. Description - ----------- --------------------------------------------------- 99.1 Press release dated April 26, 2006. 99.2 Transcript of conference call held April 26, 2006.