BOK Financial Corporation — pronounced as letters, "B-O-K" — is a financial services holding company headquartered in Tulsa, Oklahoma. Wikipedia
Subsidiaries: Bank of Texas, Bank of Albuquerque, BOKF, National Association, and more
Customer service: 1 (800) 234-6181
Headquarters: Tulsa, OK
Owner: George Kaiser (53%)
Total assets: 50.2 billion USD (fiscal year ended 31 December 2021)
CEO: Stacy Kymes (Jan 2022–)
Founded: 1910
Source: S&P Global Market Intelligence