Kimberly E. Ritrievi - 19 Nov 2025 Form 4 Insider Report for TETRA TECH INC (TTEK)

Role: Director
Signature: /s/ Preston Hopson, Attorney-in-fact for Kimberly E. Ritrievi
Issuer symbol: TTEK
Transactions as of: 19 Nov 2025
Net transactions value: $0
Form type: 4
Filing time: 03 Dec 2025, 17:54:51 UTC
Previous filing: 02 Jul 2025
Next filing: 14 Jan 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Ritrievi Kimberly E	Director	3475 EAST FOOTHILL BOULEVARD, PASADENA,	/s/ Preston Hopson, Attorney-in-fact for Kimberly E. Ritrievi	03 Dec 2025	0001592089

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	RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)	Award	$0	+1,964		$0.000000	1,964	19 Nov 2025	COMMON STOCK	1,964		Direct	F1, F2, F3

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

Explanation of Responses:

Id	Content
F1	Represents an award of restricted stock units (RSUs), each unit of which represents a contingent right to receive one share of Tetra Tech common stock.
F2	The RSUs become 100% vested as to the shares underlying the RSUs on November 30, 2026.
F3	The RSUs are exercisable at the time of vesting and do not have a set expiration date.