BRENTWOOD, Tenn.--(BUSINESS WIRE)--Delek US Holdings, Inc. (NYSE: DK) today announced that Mark Smith, EVP of Commercial Operations and other members of management will participate in the 6th Annual Credit Suisse Small & Mid Cap Conference in New York, New York on Wednesday, September 16, 2015. A copy of Delek US’ latest investor presentation will be provided at the conference. An electronic copy of this presentation is currently available in the “Investors” section of the Delek US website