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Sovereign Bank, History
The following are major historical events for Sovereign Bank, including mergers and acquisitions.
| 1984-10-29 | Institution established: Original name:The First Oklahoma Bank, National Association | |
| 1995-03-24 | Change trust powers from TRUST POWERS NOT GRANTED to FULL TRUST POWERS GRANTED | |
| 1995-10-01 | Changed name to First National Bank and Trust Company | |
| 2006-07-29 | Acquired The Guarantee State Bank (9470) in LAWTON, OK | |
| 2021-07-18 | Acquired The First State BankFirst National Bank and Trust Company (17884) in OKLAHOMA CITY, OK. |