Security State Bank
| Status: | Inactive as of 01/31/1992 |
| Merger - Without Assistance | |
| Successor Bank: | Security Bank, Madison, South Dakota |
| Headquarters: | Security State Bank 325 N.E. Second Street Madison, SD 57042 |
| Established: | 04/01/1921 |
| FDIC Insurance: | 01/01/1934 |
| FDIC Cert: | #6077 |
| Charter Class: | Commercial bank, state charter and Fed nonmember, supervised by the FDIC |
| Total Assets: | $14,002,000 |
| Total Deposits: | $12,731,000 |
History
| 1921-04-01 | Institution established: Original name:Security State Bank | |
| 1981-07-01 | Moved bank headquarters from CANOVA, SD to MADISON, SD | |
| 1992-01-31 | Changed name to Security State Bank (16220) | |
| 1992-01-31 | Merged into and subsequently operated as part of Security State Bank (16220) in MADISON, SD | |
| 1995-08-28 | Changed name to Security Bank, Madison, South Dakota (16220) | |
| 2006-02-04 | Merged into and subsequently operated as part of Great Western Bank (15289) in WATERTOWN, SD | |
| 2007-01-12 | Acquired Great Western Bank (35516) in CLIVE, IA | |
| 2007-01-12 | Acquired Great Western Bank (8327) in OMAHA, NE | |
| 2007-05-11 | Acquired Sunstate Bank (25333) in CASA GRANDE, AZ | |
| 2009-05-29 | Acquired International Bank (57223) in GREELEY, CO | |
| 2010-04-23 | Acquired F&M Bank-Iowa Central (10904) in MARSHALLTOWN, IA | |
| 2010-06-04 | Acquired TierOne Bank (29341) in LINCOLN, NE as part of a government assisted transaction. | |
| 2012-06-22 | Acquired First Federal Savings Bank of Iowa (30742) in FORT DODGE, IA | |
| 2016-05-16 | Acquired Home Federal Bank (28092) in SIOUX FALLS, SD | |
| 2017-07-05 | Moved bank headquarters from WATERTOWN, SD to SIOUX FALLS, SD |