Stock Trading History of Yamashita Tsutomu T

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 Yamashita Tsutomu T since year 2005. The trader's CIK number is 1230580. At the time of this reporting, Yamashita Tsutomu T is the VP, PROCESS DEVELOPM of Komag Inc /de/ (stock ticker symbol KOMG).

Stock purchases, sales, and option exercises reported by *Yamashita Tsutomu T* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2007-03-14	KOMG	Komag Inc /de/	Option Exercise	5,451	.01	54
2007-02-20	KOMG	Komag Inc /de/	Sale	6,965	32.13	223,793
2007-02-20	KOMG	Komag Inc /de/	Option Exercise	1,823	12.83	23,389
2006-10-10	KOMG	Komag Inc /de/	Option Exercise	25,000	.01	250
2005-05-16	KOMG	Komag Inc /de/	Sale	7,500	25.21	189,082
2005-05-13	KOMG	Komag Inc /de/	Sale	10,000	24.78	247,810

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 Yamashita Tsutomu T (VP, PROCESS DEVELOPM of Komag Inc /de/ at the time of this reporting) see the Securities and Exchange Commission (SEC) website.