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Stock Trading History of Bieber Michael A

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 Bieber Michael A since year 2005. The trader's CIK number is 1270606. At the time of this reporting, Bieber Michael A is the VICE PRESIDENT of Tetra Tech Inc . (stock ticker symbol TTEK). See this page for all insider trading activities at Tetra Tech Inc .

Stock purchases, sales, and option exercises reported by insider *Bieber Michael A* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2008-05-29	TTEK	Tetra Tech Inc	Sale	25,000	26.76	669,062
2008-05-29	TTEK	Tetra Tech Inc	Option Exercise	25,000	17.01	425,281
2006-05-11	TTEK	Tetra Tech Inc	Sale	8,718	19.22	167,600

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 Bieber Michael A (VICE PRESIDENT of Tetra Tech Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.