Exhibit 99.1

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(k)(1)(iii) under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them of a Statement on Schedule 13D originally filed on September 20, 2010 (including amendments thereto) with respect to the Common Stock, par value $0.01 per share, of Core-Mark Holding Company, Inc.  This Joint Filing Agreement shall be filed as an Exhibit to such Statement.

Dated: September 20, 2010

MMI INVESTMENTS, L.P.
By:	MCM Capital Management, LLC General Partner
By:	/s/ JEROME J. LANDE
	Jerome J. Lande
	Executive Vice President

MCM CAPITAL MANAGEMENT, LLC
By:	/s/ JEROME J. LANDE
	Jerome J. Lande
	Executive Vice President

 /s/ CLAY B. LIFFLANDER

Clay B. Lifflander

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