Security State Bank
| Status: | Inactive as of 10/27/1995 |
| Merger - Without Assistance | |
| Successor Bank: | Security State Bank |
| Headquarters: | Security State Bank 1411 Gregg Street Big Spring, TX 79720 |
| Established: | 07/14/1956 |
| FDIC Insurance: | 07/14/1956 |
| FDIC Cert: | #17630 |
| Charter Class: | Commercial bank, state charter and Fed nonmember, supervised by the FDIC |
| Total Assets: | $40,873,000 |
| Total Deposits: | $37,389,000 |
History
| 1956-07-14 | Institution established: Original name:Security State Bank | |
| 1995-10-27 | Merged into and subsequently operated as part of Security State Bank (22424) in ABILENE, 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 |