The Security National Bank & Trust Co. of Duncan
| Status: | Inactive as of 04/01/1995 |
| Merger - Without Assistance | |
| Successor Bank: | Amquest Bank |
| Headquarters: | The Security National Bank & Trust Co. of Duncan 16 South Ninth Street Duncan, OK 73533 |
| Established: | 01/01/1918 |
| FDIC Insurance: | 01/01/1934 |
| FDIC Cert: | #4082 |
| Charter Class: | Commercial bank, national (federal) charter and Fed member, supervised by the Office of the Comptroller of the Currency (OCC) |
| Total Assets: | $171,185,000 |
| Total Deposits: | $155,072,000 |
History
| 1918-01-01 | Institution established: Original name:The Security National Bank & Trust Co. of Duncan | |
| 1995-04-01 | Merged into and subsequently operated as part of Amquest Bank, National Association (19157) in LAWTON, OK | |
| 1995-04-01 | Changed name to Amquest Bank, National Association (19157) | |
| 1995-10-01 | Acquired American National Bank of Duncan (24525) in DUNCAN, OK | |
| 1997-04-25 | Merged into and subsequently operated as part of Amquest Bank, National Association (4131) in LAWTON, OK | |
| 1998-11-13 | Merged into and subsequently operated as part of BancFirst (27476) in OKLAHOMA CITY, OK | |
| 1999-03-12 | Acquired Kingfisher Bank and Trust Co. (19490) in KINGFISHER, OK | |
| 2000-11-10 | Acquired First State Bank (35460) in OKLAHOMA CITY, OK | |
| 2001-09-14 | Acquired First Southwest Bank (4100) in FREDERICK, OK | |
| 2003-08-14 | Changed institution class to INSURED COMMERCIAL BANKS, STATE, NOT MEMBERS OF THE FRS | |
| 2003-08-14 | Changed primary regulatory agency from COMPTROLLER OF THE CURRENCY to FEDERAL DEPOSIT INSURANCE CORPORATION | |
| 2004-02-20 | Acquired Lincoln National Bank (26184) in OKLAHOMA CITY, OK | |
| 2006-02-24 | Acquired Park State Bank (19294) in NICOMA PARK, OK | |
| 2006-12-08 | Acquired First Bartlesville Bank (57616) in BARTLESVILLE, OK | |
| 2010-03-05 | Acquired First State Bank, Jones, Oklahoma (4126) in JONES, OK | |
| 2010-11-11 | Acquired Union Bank of Chandler (4057) in CHANDLER, OK | |
| 2011-06-17 | Acquired Exchange National Bank of Moore (18872) in MOORE, OK | |
| 2011-10-21 | Acquired The Okemah National Bank (4163) in OKEMAH, OK | |
| 2012-02-17 | Acquired 1st Bank Oklahoma (31826) in CLAREMORE, OK | |
| 2014-01-24 | Acquired The Bank of Union (17967) in EL RENO, OK as part of a government assisted transaction. | |
| 2015-11-13 | Acquired Bank of Commerce (23250) in YUKON, OK | |
| 2018-02-16 | Acquired First Bank & Trust Company (4219) in WAGONER, OK | |
| 2018-09-07 | Acquired First Bank of Chandler (4056) in CHANDLER, OK | |
| 2020-03-06 | Acquired The Citizens State Bank (419) in OKEMAH, OK |