Stock Trading History of Antholzner Gregory P

The following table details the trading activities (stock purchases, stock sales, and stock option exercises) reported to the Securities and Exchange Commission (SEC) by insider Antholzner Gregory P since year 2005. The trader's CIK number is 1338381. At the time of this reporting, Antholzner Gregory P is the VP of Finance and Control of Core-mark Holding Company, Inc. (stock ticker symbol CORE).

Stock purchases, sales, and option exercises reported by *Antholzner Gregory P* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2007-05-15	CORE	Core-mark Holding Company, Inc.	Option Exercise	2,000	15.50	31,000
2007-05-15	CORE	Core-mark Holding Company, Inc.	Sale	2,000	35.02	70,044
2007-05-15	CORE	Core-mark Holding Company, Inc.	Option Exercise	3,000	15.50	46,500
2007-05-15	CORE	Core-mark Holding Company, Inc.	Sale	3,000	35.35	106,044
2007-02-15	CORE	Core-mark Holding Company, Inc.	Option Exercise	4,100	15.50	63,550
2007-02-15	CORE	Core-mark Holding Company, Inc.	Sale	4,100	30.36	124,489
2007-02-15	CORE	Core-mark Holding Company, Inc.	Option Exercise	900	15.50	13,950
2007-02-15	CORE	Core-mark Holding Company, Inc.	Sale	900	30.70	27,628
2007-01-03	CORE	Core-mark Holding Company, Inc.	Option Exercise	4,500	.00	0
2007-01-03	CORE	Core-mark Holding Company, Inc.	Sale	4,500	32.08	144,380
2006-11-24	CORE	Core-mark Holding Company, Inc.	Option Exercise	4,000	.00	0
2006-11-24	CORE	Core-mark Holding Company, Inc.	Sale	4,000	31.00	124,000
2006-11-15	CORE	Core-mark Holding Company, Inc.	Option Exercise	5,000	15.50	77,500
2006-11-15	CORE	Core-mark Holding Company, Inc.	Sale	5,000	30.50	152,500
2006-08-31	CORE	Core-mark Holding Company, Inc.	Option Exercise	5,000	15.50	77,500
2006-08-31	CORE	Core-mark Holding Company, Inc.	Sale	5,000	31.44	157,179

Insider trading activities including stock purchases, stock sales, and option exercises listed in the above table cannot be completely guaranteed as to their accuracy. For more information regarding the trades made by Antholzner Gregory P (VP of Finance and Control of Core-mark Holding Company, Inc. at the time of this reporting) see the Securities and Exchange Commission (SEC) website.