HF Sinclair Corporation announced that Michael C. Jennings delivered to the Board of Directors of Corporation his resignation as an officer of the Corporation effective November 9, 2023. On February 15, 2023, Mr. Jennings previously announced his retirement from the position of Chief Executive Officer of the Corporation effective May 8, 2023 and that he planned to retire from the Corporation on November 9, 2023. Since May 9, 2023, Mr. Jennings has served as Executive Vice President, Corporate of the Corporation.

Effective November 10, 2023, Mr. Jennings will serve as a consultant to the Corporation.