BRENTWOOD, Tenn.–(BUSINESS WIRE)–Delek US Holdings, Inc. (NYSE: DK) today announced the appointment of Amber Russell as Executive Vice President, Refining, effective April 20, 2026. In this role, Ms. Russell will lead the company’s refining operations, with a focus on advancing operational excellence, safety performance, and strategic growth across Delek’s refining system. Ms. Russell has nearly three decades of global energy industry experience, including senior leadership roles at ExxonMobi