Stock Trading History of Ciskowski Michael S

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 Ciskowski Michael S since year 2005. The trader's CIK number is 1229538. At the time of this reporting, Ciskowski Michael S is the EVP and CFO of Valero Energy Corp/tx . (stock ticker symbol VLO). See this page for all insider trading activities at Valero Energy Corp/tx .

Stock purchases, sales, and option exercises reported by insider *Ciskowski Michael S* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2008-06-03	VLO	Valero Energy Corp/tx	Sale	37,100	52.85	1,960,735
2008-01-16	VLO	Valero Energy Corp/tx	Option Exercise	9,050	.00	0
2007-10-12	VLO	Valero Energy Corp/tx	Sale	55,000	73.22	4,027,138
2007-05-09	VLO	Valero Energy Corp/tx	Sale	94,824	73.54	6,973,546
2007-05-09	VLO	Valero Energy Corp/tx	Option Exercise	40,800	9.82	400,860
2006-05-05	VLO	Valero Energy Corp/tx	Sale	182,925	65.12	11,911,161
2006-05-05	VLO	Valero Energy Corp/tx	Option Exercise	321,744	6.89	2,217,888
2006-01-18	VLO	Valero Energy Corp/tx	Option Exercise	38,298	.00	0

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 Ciskowski Michael S (EVP and CFO of Valero Energy Corp/tx at the time of this reporting) see the Securities and Exchange Commission (SEC) website.