TETRA TECH INC — Director's Dealing 2020

May 29, 2020

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TETRA TECH INC (TTEK)
CIK: 0000831641
Period of Report: 2020-05-27

Reporting Person: BROWNLIE WILLIAM R (SVP, Chief Engineer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2020-05-27	COMMON STOCK	M	10000	$24.26	Acquired	95338	Direct
2020-05-27	COMMON STOCK	S	10000	$79.5659	Disposed	85338	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2020-05-27	STOCK OPTION (RIGHT TO BUY)	$24.26	M	10000	Disposed	2020-11-16	COMMON STOCK (10000.0)	Direct

Footnotes

F1: Amount of securities beneficially owned was updated to reflect that 96 shares of common stock were acquired by the Reporting Person on December 13, 2019, pursuant to the Tetra Tech, Inc. Employee Stock Purchase Plan (ESPP).

F2: $79.5659 is an average price. Shares were sold at prices ranging from $79.24 to $79.88 per share.

F3: The option became exercisable as to 25% of the shares on each anniversary of the grant date.

F4: The option expires in the current year.