Kirsten M. Volpi - Nov 19, 2025 Form 4 Insider Report for TETRA TECH INC (TTEK)

Role
Director
Signature
/s/ Preston Hopson, Attorney-in-fact for Kirsten M. Volpi
Stock symbol
TTEK
Transactions as of
Nov 19, 2025
Transactions value $
$0
Form type
4
Date filed
12/2/2025, 08:23 PM
Previous filing
Nov 20, 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Volpi Kirsten M Director 3475 EAST FOOTHILL BOULEVARD, PASADENA /s/ Preston Hopson, Attorney-in-fact for Kirsten M. Volpi 2025-12-02 0001582882

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction TTEK COMMON STOCK Options Exercise $0 +1.72K +2.58% $0.00 68.2K Nov 30, 2025 Direct
transaction TTEK COMMON STOCK Options Exercise $9.59K +1K +1.47% $9.59 69.2K Nov 28, 2025 Direct

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 +1.96K $0.00 1.96K Nov 19, 2025 COMMON STOCK 1.96K Direct F1, F2, F3
transaction TTEK STOCK OPTION (RIGHT TO BUY) Options Exercise -$9.59K -1K -10% $9.59 9K Nov 28, 2025 COMMON STOCK 1K $9.59 Direct F4
transaction TTEK RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) Options Exercise $0 -1.72K -100% $0.00 0 Nov 30, 2025 COMMON STOCK 1.72K Direct F1, F3, F5
* 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.
F4 The option becomes exercisable as to 100% of the shares on the anniversary of the grant date.
F5 The RSUs become 100% vested as to the shares underlying the RSUs on November 30, 2025.