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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
1582882	M Kirsten Volpi	3475 East Foothill Boulevard Pasadena CA 91107		Yes	No	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	Disposition	2025-02-04	1,671	$34.41	68,641	No	4	S	Direct
Common Stock	Disposition	2025-02-04	4,100	$34.33	64,541	No	4	S	Direct
Common Stock	Disposition	2025-02-04	4,345	$34.31	60,196	No	4	S	Direct
Common Stock	Acquisiton	2025-02-05	6,000	$9.59	66,196	No	4	M	Direct
Common Stock	Disposition	2025-02-05	3,800	$0.00	62,396	No	4	G	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	M	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	2025-02-05	6,000	$9.59	6,000	$9.59

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
10,000	2018-11-17	2027-11-18	No	4	M	Direct

Footnotes

All shares sold at an exact price.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $34.32 to $34.33, inclusive.
Bona fide gift. No compensation was given to the donor for the gifting of shares.
On September 6, 2024, the exercise price of $47.95 was updated pursuant to a 5 to 1 forward stock split.
The option becomes exercisable as to 100% of the shares on the anniversary of the grant date.
On September 6, 2024, the balance of 3,200 shares was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 12,800 shares of common stock.