TETRA TECH INC — Director's Dealing 2026

Jan 28, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TETRA TECH INC (TTEK)
CIK: 0000831641
Period of Report: 2026-01-26

Reporting Person: Hardwick M Susan (Director)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-01-26	RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)	$	A	1754	Acquired		COMMON STOCK (1754)	Direct

Footnotes

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 exercisable as to 100% of the shares on the first anniversary of the grant date.

F3: The RSUs are exercisable at the time of vesting and do not have a set expiration date.