TETRA TECH INC — Director's Dealing 2011

Nov 16, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TETRA TECH INC (TTEK)
CIK: 0000831641
Period of Report: 2011-11-14

Reporting Person: SALIN JANIS B (SENIOR VICE PRESIDENT)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-11-14	COMMON STOCK	F	889	$22.53	Disposed	14485	Direct
2011-11-14	COMMON STOCK	A	220	—	Acquired	14705	Direct
2011-11-14	COMMON STOCK	F	404	$22.14	Disposed	14301	Direct
2011-11-15	COMMON STOCK	M	7867	$17.51	Acquired	22168	Direct
2011-11-15	COMMON STOCK	S	7867	$22.0424	Disposed	14301	Direct
2011-11-15	COMMON STOCK	M	17133	$17.51	Acquired	31434	Direct
2011-11-15	COMMON STOCK	S	17133	$22.0424	Disposed	14301	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-11-15	EMPLOYEE STOCK OPTION (RIGHT TO BUY)	$17.51	M	7867	Disposed	2012-02-11	COMMON STOCK (7867)	Direct
2011-11-15	EMPLOYEE STOCK OPTION (RIGHT TO BUY)	$17.51	M	17133	Disposed	2012-02-11	COMMON STOCK (17133)	Direct

Footnotes

F1: In accordance with the Executive Compensation Policy, 120% of the installment vested on November 14, 2011 and 220 additional shares were issued to the reporting person.

F2: The option was fully vested as of Feruary 11, 2006.