Craig L. Christensen - 03 Sep 2021 Form 4 Insider Report for TETRA TECH INC (TTEK)

Role: SVP, CIO
Signature: /s/ Preston Hopson, Attorney-in-fact for Craig L. Christensen
Issuer symbol: TTEK
Transactions as of: 03 Sep 2021
Net transactions value: -$588,042
Form type: 4
Filing time: 03 Sep 2021, 19:02:47 UTC
Next filing: 22 Nov 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	Gift	$0	-300	-0.89%	$0.000000	33,439	03 Sep 2021	Direct	F1
transaction	TTEK	COMMON STOCK	Options Exercise	$129,649	+4,756	+14%	$27.26^*	38,195	03 Sep 2021	Direct
transaction	TTEK	COMMON STOCK	Sale	$717,690	-4,756	-12%	$150.90	33,439	03 Sep 2021	Direct	F2

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	$0	-4,756	-100%	$0.000000^*	0	03 Sep 2021	COMMON STOCK	4,756	$27.26	Direct	F3, F4

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

Explanation of Responses:

Id	Content
F1	Bona fide gift. No compensation was given to the donor for the gifting of shares.
F2	$150.9021 is an average price. Shares were sold at prices ranging from $150.90 to $151.00 per share.
F3	The option becomes exercisable as to 25% of the shares on each anniversary of the grant date.
F4	The option granted expires 8 years after the grant date.