On July 27, 2023, the Board of Directors of BancFirst Corporation appointed Leslie J. Rainbolt, M.D., M.B.A. as a director. Dr. Rainbolt accepted the position effective at the Board meeting on July 27, 2023. Her term will expire at the annual meeting of shareholders in May 2024 at which time she will stand for re-election.

Dr. Rainbolt currently serves on the Board of OU Health, the M.D. Anderson Cancer Center Board of Visitors, the Harold Hamm Diabetes Center Board of Advisors, the Children's Hospital Foundation Board, the National Cowboy and Western Heritage Museum Board of Directors, the Stephen Cancer Center Leadership Council, the Communities Foundation of Oklahoma Board, and the Board of Tattered Cover, an independent bookstore in Denver, Colorado. She received a Bachelor of Arts from Newcomb College of Tulane University in Political Science/International Relations, her M.B.A./M.I.M. from the American Graduate School of International Management, now the Thunderbird Schools of Global Management and her M.D. from the University of Oklahoma College of Medicine. Dr. Rainbolt is the sister to David E. Rainbolt, the Executive Chairman of the Company, and therefore she will not be independent and will not serve on the Independent Directors Committee.