Delek US(DK) - 2025 Q4 - Annual Results

Exhibit 99.1 Delek US Holdings Reports Fourth Quarter 2025 Results BRENTWOOD, Tenn.-- February 27, 2026 -- Delek US Holdings, Inc. (NYSE: DK) ("Delek US", "Company") today announced financial results for its fourth quarter ended December 31, 2025. "2025 has been a transformational year for DK in improving its cash flow profile through successful implementation of the Enterprise Optimization Plan, reducing the costs of Inventory Intermediation Agreements, and progressing its economic separation with Delek Lo ...