Exhibit 99.1 100 N. Broadway Ave FOR IMMEDIATE RELEASE Oklahoma City, OK 73102 Thursday, July 18, 2024 www.bancfirst.bank BANCFIRST CORPORATION REPORTS SECOND QUARTER EARNINGS BancFirst Corporation (NASDAQ GS:BANF) reported net income of $50.6 million, or$1.51 per diluted share, for the second quarter of 2024 compared to net income of $55.0 million, or$1.64 per diluted share, for the second quarter of 2023. The Company's net interest income for the second quarter of 2024 increased to $109.9 million from$ ...