Disclaimers Important Information: Delek US and ALDW security holders are urged to read the consent statement/prospectus regarding the proposed transaction when it becomes available because it will contain important information. Investors will be able to obtain a free copy of the consent statement/prospectus, as well as other filings containing information about the proposed transaction, without charge, at the SEC’s internet site (http://www.sec.gov). Copies of the consent statement/prospectus and the filings with the SEC that will be incorporated by reference in the consent statement/prospectus can also be obtained, without charge, by directing a request either to Delek US Holdings, Inc., 7102 Commerce Way, Brentwood, Tennessee, 37027, Attention: Investor Relations or to Alon USA Partners, LP, 12700 Park Central Drive, Suite 1600, Dallas, Texas 75251, Attention: Investor Relations. The respective directors and executive officers of Delek US and Alon USA Partners GP, LLC (the “General Partner”) may be deemed to be “participants” (as defined in Schedule 14A under the Securities and Exchange Act of 1934, as amended (the “Exchange Act”)) in respect of the proposed transaction. Information about Delek US’s directors and executive officers is available in Old Delek’s (as defined below) annual report on Form 10-K for the fiscal year ended December 31, 2016, filed with the SEC on February 28, 2017, and in its proxy statement for its 2017 annual meeting of stockholders, filed with the SEC on April 6, 2017, and in Old Delek’s and Delek US’s subsequent filings with the SEC. Information about the General Partner’s directors and executive officers is available in ALDW’s annual report on Form 10-K for the fiscal year ended December 31, 2016 filed with the SEC on February 27, 2017, and subsequent filings with the SEC. Other information regarding the participants in the solicitation and a description of their direct and indirect interests, by security holdings or otherwise, will be contained in the consent statement/prospectus and other relevant materials to be filed with the SEC when they become available. On January 2, 2017, Delek US Energy, Inc. (formerly known as Delek US Holdings, Inc.), Delaware corporation (“Old Delek”), entered into an Agreement and Plan of Merger with Alon, Delek US (formerly known as Delek Holdco, Inc.), a Delaware corporation (also referred to as “New Delek” herein), Dione Mergeco, Inc., a Delaware corporation and wholly owned subsidiary of the Registrant (“Delek Merger Sub”), and Astro Mergeco, Inc., a Delaware corporation and wholly owned subsidiary of the Registrant (“Astro Merger Sub”), as amended by the First Amendment to Agreement and Plan of Merger, dated as of February 27, 2017, and the Second Amendment to Agreement and Plan of Merger, dated as of April 21, 2017 (collectively, the “Delek-Alon Merger Agreement”). Pursuant to the Delek-Alon Merger Agreement, Certificates of Amendment and Certificates of Merger filed with the Secretary of State of the State of Delaware on June 30, 2017, (i) Old Delek was renamed “Delek US Energy, Inc.” and Delek US was renamed “Delek US Holdings, Inc.”; (ii) Delek Merger Sub merged with and into Old Delek (the “Delek Merger”), with Old Delek surviving as a wholly owned subsidiary of the Registrant; and (iii) Astro Merger Sub merged with and into Alon (the “Alon Merger” and together with the Delek Merger, the “Delek-Alon Mergers”), with Alon surviving as a direct and indirect wholly owned subsidiary of the Registrant. The Delek-Alon Mergers were effective as of July 1, 2017 (the “Delek-Alon Effective Time”). By reason of the Delek-Alon Mergers, at the Delek-Alon Effective Time, New Delek became the parent public reporting company. On July 3, 2017, New Delek filed a Current Report on Form 8-K filed for the purpose of establishing Delek US as the successor issuer to Old Delek and Alon pursuant to Rule 12g-3(c) under the Exchange Act. In addition, as a result of the Delek-Alon Mergers, the shares of common stock of Old Delek and Alon were delisted from the New York Stock Exchange in July 2017, and their respective reporting obligations under the Exchange Act were terminated. This document shall not constitute an offer to sell or the solicitation of an offer to buy any securities, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. No offering of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the Securities Act of 1933, as amended (the “Securities Act”).