Core-Mark Accelerates $0.19/Share Qtr. Dividend Payment to Dec. 31st

Core-Mark Holding Company, Inc.

, one of the largest marketers of fresh and broad-line supply solutions to the convenience retail industry in North America, announced today that its Board of Directors has declared an accelerated cash dividend of $0.19 per common share. The dividend will be paid in lieu of the Company's regular quarterly dividend that would have been paid in the first quarter of 2013. The dividend is payable on December 31, 2012 to shareholders of record as of the close of business on December 20, 2012.