Core-Mark Announces First Quarter 2010 Investor Call

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

SOUTH SAN FRANCISCO, CA--(Marketwire - May 4, 2010) -  Core-Mark Holding Company, Inc. (NASDAQ: CORE), announced today that it will host an investor call to discuss first quarter 2010 earnings results on Friday, May 7, 2010 at 9:00 a.m. Pacific time. The call may be accessed by dialing 1-800-588-4973 using the code 26161516. The call may also be listened to on the internet website www.core-mark.com.

An audio replay will be available for two weeks following the call by dialing 888-843-8996 using the same code. The replay will also be available via webcast at www.core-mark.com for approximately 90 days.

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 provides distribution and logistics services as well as marketing programs to over 25,000 retail locations in 50 U.S. states and five Canadian provinces through 26 distribution centers, two of which Core-Mark operates as third party logistics providers. Core-Mark services traditional convenience retailers, grocers, drug, liquor and specialty stores, and other stores that carry consumer packaged goods. For more information, please visit www.core-mark.com.