Security State Bank
| Status: | Inactive as of 07/31/1998 |
| Merger - Without Assistance | |
| Successor Bank: | American State Bank |
| Headquarters: | Security State Bank 402 Cypress Street Abilene, TX 79601 |
| Established: | 02/28/1977 |
| FDIC Insurance: | 02/28/1977 |
| FDIC Cert: | #22424 |
| Charter Class: | Commercial bank, state charter and Fed nonmember, supervised by the FDIC |
| Total Assets: | $283,863,000 |
| Total Deposits: | $244,991,000 |
History
| 1977-02-28 | Institution established: Original name:Security State Bank | |
| 1985-09-16 | Change trust powers from TRUST POWERS NOT GRANTED to FULL TRUST POWERS GRANTED | |
| 1992-10-30 | Acquired The Farmers and Merchants National Bank of Merkel (3338) in MERKEL, TX | |
| 1995-03-31 | Acquired Citizens State Bank (26589) in GORMAN, TX | |
| 1995-10-27 | Acquired Security State Bank (17630) in BIG SPRING, TX | |
| 1998-07-31 | Merged into and subsequently operated as part of American State Bank (16701) in LUBBOCK, TX | |
| 2005-10-28 | Acquired First National Bank in Cisco (3137) in CISCO, TX | |
| 2012-07-01 | Merged into and subsequently operated as part of Prosperity Bank (16835) in EL CAMPO, TX | |
| 2012-10-01 | Acquired Community National Bank (57345) in BELLAIRE, TX | |
| 2013-01-01 | Acquired First Federal Bank Texas (30048) in TYLER, TX | |
| 2013-04-01 | Acquired Coppermark Bank (18957) in OKLAHOMA CITY, OK | |
| 2013-11-01 | Acquired First Victoria National Bank (5570) in VICTORIA, TX | |
| 2014-04-01 | Acquired The F&M Bank & Trust Company (16390) in TULSA, OK | |
| 2016-01-01 | Acquired Tradition Bank - Bellaire (23032) in HOUSTON, TX | |
| 2019-11-01 | Acquired LegacyTexas Bank (58006) in PLANO, TX |