Stock Trading History of Hammack William

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 Hammack William since year 2005. The trader's CIK number is 1230572. At the time of this reporting, Hammack William is the VP, HUMAN RESOURCES of Komag Inc /de/ (stock ticker symbol KOMG).

Stock purchases, sales, and option exercises reported by *Hammack William* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2007-03-09	KOMG	Komag Inc /de/	Option Exercise	3,894	.01	38
2007-03-09	KOMG	Komag Inc /de/	Sale	2,571	31.95	82,143
2006-10-31	KOMG	Komag Inc /de/	Option Exercise	859	12.83	11,020
2006-10-31	KOMG	Komag Inc /de/	Sale	859	37.99	32,633
2006-08-14	KOMG	Komag Inc /de/	Option Exercise	1,094	12.83	14,036
2006-08-14	KOMG	Komag Inc /de/	Sale	1,094	36.52	39,958
2006-05-23	KOMG	Komag Inc /de/	Option Exercise	859	12.83	11,020
2006-05-23	KOMG	Komag Inc /de/	Sale	859	44.42	38,155
2006-03-10	KOMG	Komag Inc /de/	Option Exercise	6,172	12.83	79,186
2006-03-10	KOMG	Komag Inc /de/	Sale	6,172	48.51	299,412
2006-03-13	KOMG	Komag Inc /de/	Option Exercise	12,000	.01	120
2005-08-05	KOMG	Komag Inc /de/	Sale	4,980	37.52	186,849

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 Hammack William (VP, HUMAN RESOURCES of Komag Inc /de/ at the time of this reporting) see the Securities and Exchange Commission (SEC) website.