BRENTWOOD, Tenn.– February 26, 2018 — Delek US Holdings, Inc. (NYSE: DK) (“Delek US”) today announced financial results for its fourth quarter ended December 31, 2017. Delek US reported fourth quarter net income of $211.1 million, or $2.56 per diluted share, versus net income of $44.2 million, or $0.72 per diluted share, for the quarter ended December 31, 2016. On an adjusted basis, Delek US reported net income of $40.7 million, or $0.50 per diluted share for the quarter ended December 31, 2017, which primarily excludes $166.9 million, or $2.02 per share, related to an income tax benefit from remeasuring certain net deferred tax liabilities as a result of the Tax Cuts and Jobs Act of 2017. This compares to an adjusted net loss of $(27.9) million, or $(0.45) per basic share on an adjusted basis in the prior year period. Adjusted earnings before interest taxes, depreciation and amortization (“adjusted EBITDA”) was $154.0 million compared to adjusted EBITDA of $(10.4) million in the prior year period. Reconciliations of net income (loss) reported under U.S. GAAP to adjusted net income (loss) and adjusted EBITDA are included in the financial tables attached to this release.