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First State Bank & Trust, History
The following are major historical events for First State Bank & Trust, including mergers and acquisitions.
| 1926-02-01 | Institution established: Original name:The First & Commercial National Bank of Williston | |
| 1940-02-01 | Changed name to First National Bank in Williston | |
| 1973-07-01 | Changed name to First National Bank & Trust Co. of Williston | |
| 1987-10-15 | Acquired Citizens State Bank of Ray (10252) in RAY, ND | |
| 1988-01-21 | Acquired Williston Basin State Bank (23042) in WILLISTON, ND | |
| 1990-09-13 | Acquired First National Bank of Crosby (22505) in CROSBY, ND | |
| 1991-01-31 | Reorganized. | |
| 2020-01-01 | Changed institution class to INSURED COMMERCIAL BANKS, STATE, NOT MEMBERS OF THE FRS | |
| 2020-01-01 | Changed name to First State Bank & Trust | |
| 2020-01-01 | Changed primary regulatory agency from COMPTROLLER OF THE CURRENCY to FEDERAL DEPOSIT INSURANCE CORPORATION |