STEVEN M. BURDICK - 03 Dec 2021 Form 4 Insider Report for TETRA TECH INC (TTEK)

Role: EVP, CFO
Signature: /s/ Preston Hopson, Attorney-in-fact for Steven M. Burdick
Issuer symbol: TTEK
Transactions as of: 03 Dec 2021
Net transactions value: -$516,647
Form type: 4
Filing time: 03 Dec 2021, 19:10:19 UTC
Previous filing: 24 Nov 2021
Next filing: 10 Dec 2021
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	TTEK	COMMON STOCK	Options Exercise	$133,780	+2,790	+4.6%	$47.95	63,315	03 Dec 2021	Direct
transaction	TTEK	COMMON STOCK	Sale	$516,647	-2,790	-4.4%	$185.18	60,525	03 Dec 2021	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	TTEK	STOCK OPTION (RIGHT TO BUY)	Options Exercise	$133,780	-2,790	-100%	$47.95	0	03 Dec 2021	COMMON STOCK	2,790	$47.95	Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	$185.178110 is an average price. Shares were sold at prices ranging from $185.161 to $185.70 per share.
F2	The option becomes exercisable as to 25% of the shares on each anniversary of the grant date.