| Acquired by | ACI Worldwide |
| Date | 2/12 |
| Terms | Cash and Stock |
| Acquired by | ACI Worldwide |
| Date | 2/12 |
| Terms | Cash and Stock |
| Website | s1.com |
| Phone | 1-404-923-3500 |
| Employees |
| PM Systems, 3/10 |
S1 Corporation delivers integrated financial services on an open platform to leading financial institutions, retailers, and processors. Their solution family spans payments, online banking, branch banking, and lending.