First Security Bank of Big Timber
| Status: | Inactive as of 10/31/1992 |
| Merger - Without Assistance | |
| Successor Bank: | American Bank |
| Headquarters: | First Security Bank of Big Timber Stock And First Streets Big Timber, MT 59011 |
| Established: | 07/02/1973 |
| FDIC Insurance: | 07/02/1973 |
| FDIC Cert: | #21143 |
| Charter Class: | Commercial bank, state charter and Fed nonmember, supervised by the FDIC |
| Total Assets: | $13,141,000 |
| Total Deposits: | $11,919,000 |
History
| 1973-07-02 | Institution established: Original name:1st State Bank of Big Timber | |
| 1979-01-25 | Changed name to First Security Bank of Big Timber | |
| 1992-10-31 | Changed name to American Bank (20311) | |
| 1992-10-31 | Acquired First Security Bank of Big Timber in BIG TIMBER, MT | |
| 1992-10-31 | Merged into and subsequently operated as part of American Bank (20311) in BILLINGS, MT | |
| 1992-10-31 | Acquired InterWest Bank of Montana (20409) in BOZEMAN, MT | |
| 1992-10-31 | Acquired First Security Bank of Livingston (16618) in LIVINGSTON, MT | |
| 1997-12-06 | Changed name to American Bank of Montana (20311) | |
| 1997-12-06 | Moved bank headquarters from BILLINGS, MT to BOZEMAN, MT | |
| 1998-04-27 | Acquired American Bank (Whitefish) (34063) in WHITEFISH, MT | |
| 2004-09-20 | Changed name to American Bank (20311) | |
| 2016-09-15 | Changed institution class to INSURED COMMERCIAL BANKS, STATE, NOT MEMBERS OF THE FRS |