American National Bank
| Status: | Inactive as of 02/25/1987 |
| Merger - Assisted Participated in Open Bank Assistance | |
| Successor Bank: | Landmark Bank Company |
| Headquarters: | American National Bank 900 West Main Durant, OK 74701 |
| Established: | 09/17/1982 |
| FDIC Insurance: | 09/17/1982 |
| FDIC Cert: | #24068 |
| Charter Class: | Commercial bank, national (federal) charter and Fed member, supervised by the Office of the Comptroller of the Currency (OCC) |
| Total Assets: | $9,696,000 |
| Total Deposits: | $10,167,000 |
History
| 1982-09-17 | Institution established: Original name:American National Bank | |
| 1987-02-25 | Changed name to First American National Bank (12288) | |
| 1987-02-25 | Failed. Acquired with government financial assistance and subsequently operated as part of First American National Bank (12288) | |
| 1987-02-25 | Maintained operations with government open bank assistance. | |
| 1987-03-20 | Change trust powers from TRUST POWERS NOT GRANTED to FULL TRUST POWERS GRANTED | |
| 1987-03-20 | Acquired The Madill Bank and Trust Company (4243) in MADILL, OK | |
| 1988-01-01 | Changed name to The Bank of Southern Oklahoma, National Association and Trust Company (12288) | |
| 1990-03-05 | Moved bank headquarters from DURANT, OK to MADILL, OK | |
| 1991-12-31 | Change trust powers from FULL TRUST POWERS GRANTED to TRUST POWERS TERMINATED | |
| 1992-02-13 | Changed name to The Bank of Southern Oklahoma, National Association (12288) | |
| 1997-02-21 | Changed name to Landmark Bank Company, National Association (12288) | |
| 1998-11-09 | Moved bank headquarters from MADILL, OK to ARDMORE, OK | |
| 2000-08-25 | Merged into and subsequently operated as part of Landmark Bank, National Association (34498) in ADA, OK | |
| 2004-08-27 | Acquired Landmark Bank, National Association (3273) in DENISON, TX | |
| 2009-04-24 | Changed name to Landmark Bank, National Association (4537) | |
| 2009-04-24 | Acquired First National Bank (12216) in MOUNTAIN VIEW, MO | |
| 2009-04-24 | Merged into and subsequently operated as part of Landmark Bank, National Association (4537) in COLUMBIA, MO | |
| 2012-05-12 | Acquired Bank of Birch Tree (8278) in BIRCH TREE, MO | |
| 2017-12-29 | Changed institution class to INSURED COMMERCIAL BANKS, STATE, NOT MEMBERS OF THE FRS | |
| 2017-12-29 | Changed primary regulatory agency from COMPTROLLER OF THE CURRENCY to FEDERAL DEPOSIT INSURANCE CORPORATION | |
| 2017-12-29 | Changed name to Landmark Bank (4537) | |
| 2020-02-15 | Merged into and subsequently operated as part of Simmons Bank (3890) in PINE BLUFF, AR |