Core-Mark Holding Co Inc – Underwriting Agreements Watch

from SC 13G 1 page Exhibit 1 Joint Filing Agreement Pursuant to Rule 13d-1(k)(1) the Undersigned Acknowledge and Agree That the Foregoing Statement on Schedule 13g Is Filed on Behalf of Each of the Undersigned and That All Subsequent Amendments to This Statement on Schedule 13g Shall Be Filed on Behalf of Each of the Undersigned Without the Necessity of Filing Additional Joint Filing Agreements. the Undersigned Acknowledge That Each Shall Be Responsible for the Timely Filing of Such Amendments, and for the Completeness and Accuracy of the Information Concerning It Contained Therein, but Shall Not Be Responsible for the Completeness and Accuracy of the Information Concerning the Others, Except to the Extent That It Knows or Has Reason to Believe That Such Information Is Inaccurate. This Agreement May Be Executed in Any Number of Counterparts and All of Such Counterparts Taken Together Shall Constitute One and the Same Instrument. Dated: February 10, 2006 Third Point LLC By: /S/ Daniel S. Loeb Name: Daniel S. Loeb Title: Chief Executive Officer Third Point Offshore Fund, Ltd. By: /S/ Daniel S. Loeb Name: Daniel S. Loeb Title: Director /S/ Daniel S. Loeb Daniel S. Loeb [Joint Filing Agreement of Schedule 13g With Respect to Core-Mark Holding Company, Inc.]