George B Kaiser (Born 1942) is an American self-made billionaire businessman and chairman of BOK Financial Corporation. Born in 1942, he attended Tulsa public schools, and went on to earn a bachelor's degree and MBA from Harvard University. He briefly considered joining the U.S. Foreign Service, but instead returned to Tulsa in 1966 to work for his father. Kaiser took control of Kaiser-Francis Oil Company in 1969. In 1990, Kaiser bought the Bank of Oklahoma, N.A. from the FDIC, the government agency that guarantees the soundness of the nation's major savings institutions. Buying the Bank of Oklahoma landed Kaiser on the Forbes 400 wealthiest Americans. By the end of 1998, Kaiser's ownership interests in BOKF were worth 917 million dollars. With an estimated current net worth of around $11 billion, he is ranked by Forbes as the 26-richest person in America.