BRENTWOOD, Tenn. — June 30, 2017 — Delek US Holdings, Inc. (NYSE: DK) (“Delek US”) today announced the closing of the acquisition of the remaining outstanding shares of Alon USA Energy, Inc. (NYSE: ALJ) (“Alon”) common stock in an all-stock transaction. The close of this transaction will be effective at 12:02 a.m. Eastern Time on July 1, 2017. Under terms of the agreement, the owners of the remaining outstanding shares in Alon will receive a fixed exchange ratio of 0.5040 Delek US shares for each share of Alon, with cash paid in lieu of fractional shares. Prior to this transaction, Delek US owned approximately 33.7 million shares, or 47 percent, of the common stock of Alon. Following closing, Delek US will have approximately 82.0 million shares outstanding.