| Date Filed | Type | Description |
| 02/14/2013 |
SC 13G/A
| AQR CAPITAL MANAGEMENT LLC reports a 0% stake in S1 Corp. |
| 02/24/2012 |
15-12G
| Form 15-12G - Securities registration termination [Section 12(g)] |
| 02/16/2012 |
SC TO-T/A
| Form SC TO-T/A - Tender offer statement by Third Party: [Amend] |
| 02/16/2012 |
425
| Form 425 - Prospectuses and communications, business combinations |
| 02/14/2012 |
SC 13G
| S1 CORP reports a 7.7% stake in S1 Corp. |
| 02/13/2012 |
8-K
| Quarterly results |
| 02/13/2012 |
SC 13G/A
| S1 CORP reports a 0% stake in S1 Corporation |
| 02/09/2012 |
SC 13G
| S1 CORP reports a 5.3% stake in S1 CORP |
| 02/09/2012 |
SC 13G
| Form SC 13G - Statement of acquisition of beneficial ownership by individuals |
| 02/06/2012 |
8-K
| Form 8-K - Current report |
| 02/03/2012 |
425
| Form 425 - Prospectuses and communications, business combinations |
| 01/24/2012 |
8-K
| Other Events, Financial Statements and Exhibits |
| 01/24/2012 |
SC TO-T/A
| Form SC TO-T - Tender offer statement by Third Party [amend] |
| 01/24/2012 |
425
| Form 425 - Prospectuses and communications, business combinations |
| 01/11/2012 |
SC 13G
| Form SC 13G - Statement of acquisition of beneficial ownership by individuals |
| 12/29/2011 |
SC TO-T/A
| Form SC TO-T - Tender offer statement by Third Party [amend] |
| 12/29/2011 |
425
| Form 425 - Prospectuses and communications, business combinations |
| 12/02/2011 |
8-K
| Form 8-K - Current report |
| 12/01/2011 |
SC TO-T/A
| Form SC TO-T - Tender offer statement by Third Party [amend] |
| 12/01/2011 |
425
| Form 425 - Prospectuses and communications, business combinations |
| 11/17/2011 |
8-K/A
| Form 8-K - Current report [amend] |
| 11/15/2011 |
8-K
| Entry into a Material Definitive Agreement, Departure of Directors or Certain Officers; Election of Directors; Appointment of... |
| 11/10/2011 |
SC 13G/A
| Form SC 13G - Statement of acquisition of beneficial ownership by individuals [amend] |
| 11/10/2011 |
SC 13G/A
| Form SC 13G - Statement of acquisition of beneficial ownership by individuals [amend] |
| 11/10/2011 |
SC 13G/A
| Form SC 13G - Statement of acquisition of beneficial ownership by individuals [amend] |
| 11/10/2011 |
SC 13G/A
| Form SC 13G - Statement of acquisition of beneficial ownership by individuals [amend] |
| 11/09/2011 |
10-Q
| Quarterly Report for the period ended September 30, 2011 |
| 11/08/2011 |
8-K
| Conference call transcript |
| 11/07/2011 |
8-K
| Quarterly results |
| 11/07/2011 |
8-K
| Regulation FD Disclosure, Financial Statements and Exhibits |
| 11/07/2011 |
GN
| S1 Corporation Reports Third Quarter 2011 Financial Results |
| 11/01/2011 |
8-K
| Other Events, Financial Statements and Exhibits |
| 10/31/2011 |
425
| Form 425 - Prospectuses and communications, business combinations |
| 10/31/2011 |
GN
| S1 Corporation to Announce Third Quarter 2011 Financial Results on November 7, 2011 |
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