TETRA TECH INC — Director's Dealing 2013

May 14, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TETRA TECH INC (TTEK)
CIK: 0000831641
Period of Report: 2013-05-14

Reporting Person: HADEN PATRICK C (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-05-14	COMMON STOCK	M	8000	$21.41	Acquired	15700	Direct
2013-05-14	COMMON STOCK	S	8000	$27.40	Disposed	7700	Direct
2013-05-14	COMMON STOCK	M	8000	$20.28	Acquired	15700	Direct
2013-05-14	COMMON STOCK	S	8000	$27.40	Disposed	7700	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-05-14	STOCK OPTION	$21.41	M	8000	Disposed	2014-03-02	COMMON STOCK (8000)	Direct
2013-05-14	STOCK OPTION	$20.28	M	8000	Disposed	2020-03-02	COMMON STOCK (8000)	Direct

Footnotes

F1: The option was fully vested as of March 1, 2005.

F2: The option was fully vested as of March 1, 2011.