Core-Mark Announces First Quarter 2013 Investor Call

| Source: Core-Mark Holding Company, Inc. Core-Mark Holding Company, Inc.

SOUTH SAN FRANCISCO, CA--(Marketwired - May 1, 2013) - Core-Mark Holding Company, Inc. (NASDAQ: CORE), announced today that it will release its earnings before the market opens on Tuesday May 7, 2013 for the first quarter ended March 31, 2013, and will host an investor call later that morning. The call will be held at 9:00 a.m. Pacific time on Tuesday, May 7, 2013 and may be accessed by dialing 1-800-588-4973 using the code 34706595. The call may also be listened to on the Company's website www.core-mark.com.

An audio replay will be available for two weeks following the call by dialing 888-843-7419 using the same code provided above. The replay will also be available via webcast at www.core-mark.com for approximately 90 days following the call.

Core-Mark

Core-Mark is one of the largest marketers of fresh and broad-line supply solutions to the convenience retail industry in North America. Founded in 1888, Core-Mark offers a full range of products, marketing programs and technology solutions to approximately 29,000 customer locations in the U.S. and Canada through 28 distribution centers (excluding two distribution facilities the Company operates as a third party logistics provider). Core-Mark services traditional convenience retailers, grocers, drug, liquor and specialty stores, and other stores that carry convenience products. For more information, please visit www.core-mark.com.