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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
831641	Tetra Tech Inc	TTEK	Services-Engineering Services (8711)	954148514

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1346227	R William Brownlie	3475 East Foothill Boulevard Pasadena, CA 91107	Svp, Chief Engineer	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Acquisiton	2021-02-22	12,788	$28.58	99,560	No	4	M	Direct
Common Stock	Disposition	2021-02-22	12,788	$141.82	86,772	No	4	S	Direct
Common Stock	Disposition	2021-02-23	2,500	$0.00	84,272	No	4	G	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	S	Direct
No	4	G	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	STOCK OPTION (RIGHT TO BUY)	Disposition	2021-02-22	12,788	$0.00	12,788	$28.58

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0	2014-11-22	2021-11-22	No	4	M	Direct

Footnotes

Amount of securities beneficially owned was updated to reflect that 58 shares of common stock were acquired by the Reporting Person on December 15, 2020, pursuant to the Tetra Tech, Inc. Employee Stock Purchase Plan (ESPP).
$141.8217 is an average price. Shares were sold at prices ranging from $140.43 to $142.27 per share.
Bona fide gift. No compensation was given to the donor for the gifting of shares.
The option became exercisable as to 25% of the shares on each anniversary of the grant date.
The option granted expires 8 years after the grant date.