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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
831641	Tetra Tech Inc	TTEK	Services-Engineering Services (8711)	954148514

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1187157	A Richard Lemmon	3475 East Foothill Boulevard Pasadena, CA 91107	Senior Vice President	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Acquisiton	2013-11-16	500	$0.00	20,491	No	4	M	Direct
Common Stock	Disposition	2013-11-16	188	$28.87	20,303	No	4	F	Direct
Common Stock	Acquisiton	2013-11-18	1,500	$24.56	21,803	No	4	M	Direct
Common Stock	Disposition	2013-11-18	1,500	$29.01	20,303	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	F	Direct
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	RESTRICTED STOCK UNITS	Disposition	2013-11-16	500	$0.00	500	$0.00
Common Stock	STOCK OPTION	Disposition	2013-11-18	1,500	$0.00	1,500	$24.56

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
187,000	2012-11-16	2016-11-16	No	4	M	Direct
185,500	2005-09-06	2014-01-20	No	4	M	Direct

Footnotes

On November 16, 2013, 500 restricted stock units (RSUs) awarded in November 2012 vested. Of the vested RSUs, 188 underlying shares were withheld to pay the related tax liability.
The option was fully vested as of September 6, 2005.
On November 16, 2013, 500 restricted stock units (RSUs) awarded in November 2012 vested. The shares of common stock into which such vested RSUs converted are reported in Table I of this Form 4.
Represents the conversion upon vesting of restricted stock units into common stock.