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BankWest, Inc., History
The following are major historical events for BankWest, Inc., including mergers and acquisitions.
| 1889-08-30 | Institution established: Original name:The Pierre National Bank | |
| 1980-04-01 | Acquired Badlands State Bank (1120) in KADOKA, SD | |
| 1980-04-01 | Changed name to BankWest, N.A. | |
| 1980-04-01 | Acquired Vivian State Bank (1670) in VIVIAN, SD | |
| 1982-01-04 | Acquired SULLY COUNTY BANK (19933) in ONIDA, SD | |
| 1982-01-04 | Changed name to BankWest, National Association | |
| 1984-12-06 | Acquired The First National Bank of Selby (4014) in SELBY, SD | |
| 1986-09-29 | Changed name to BankWest, Inc. | |
| 1986-09-29 | Changed primary regulatory agency from COMPTROLLER OF THE CURRENCY to FEDERAL DEPOSIT INSURANCE CORPORATION | |
| 2016-07-01 | Acquired First State Bank (3983) in ARMOUR, SD |