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Security Bank, History
The following are major historical events for Security Bank, including mergers and acquisitions.
| 1902-01-01 | Institution established: Original name:The Pawnee National Bank | |
| 1990-09-12 | Maintained operations with government open bank assistance. | |
| 2000-01-24 | Changed name to Security Bank, National Association | |
| 2000-09-01 | Changed primary regulatory agency from COMPTROLLER OF THE CURRENCY to FEDERAL RESERVE BOARD | |
| 2000-09-01 | Changed institution class to INSURED COMMERCIAL OR SAVINGS BANKS, STATE, MEMBERS FRS | |
| 2000-09-01 | Changed name to Security Bank | |
| 2008-09-22 | Moved bank headquarters from PAWNEE, OK to TULSA, OK |