Randolph I. Thornton has served as a Director and Chairman of the Board of Directors of Core-Mark since August 2004 and also serves as a member of the board of directors of the Post Confirmation Trust of the Fleming Companies. Mr. Thornton has served as the President and Chief Executive Officer of Comdisco Holding Company, Inc. since August 2004. From May 1970 to February 2004, Mr. Thornton was employed by Citigroup, Inc., most recently serving as a managing director until his retirement from Citigroup, Inc. in February 2004. Mr. Thornton is a member of the board of directors of Comdisco Holding Company, Inc. In addition, Mr. Thornton was a member of the board of directors of Edison Brothers Stores, Inc. from 1997 to 2000 and served as the chair of its audit committee during that time. Mr. Thornton received a Bachelor of Arts degree in history from Lafayette College and a Master of Business Administration degree from Columbia Business School.