Preston Hopson - Nov 19, 2025 Form 4 Insider Report for TETRA TECH INC (TTEK)

Role
EVP, Chief Legal/Human Capital
Signature
/s/ Preston Hopson
Stock symbol
TTEK
Transactions as of
Nov 19, 2025
Transactions value $
-$71,009
Form type
4
Date filed
12/2/2025, 08:18 PM
Previous filing
Nov 20, 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Hopson Preston EVP, Chief Legal/Human Capital 3475 EAST FOOTHILL BLVD., PASADENA /s/ Preston Hopson 2025-12-02 0001728969

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction TTEK COMMON STOCK Options Exercise $0 +2.74K +3.42% $0.00 82.7K Nov 30, 2025 Direct
transaction TTEK COMMON STOCK Options Exercise $0 +2.46K +2.97% $0.00 85.2K Nov 30, 2025 Direct
transaction TTEK COMMON STOCK Tax liability -$71K -2.04K -2.4% $34.74 83.1K Nov 30, 2025 Direct F1

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 +14K $0.00 14K Nov 19, 2025 COMMON STOCK 14K Direct F2, F3, F4
transaction TTEK RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) Options Exercise $0 -2.74K -33.37% $0.00 5.46K Nov 30, 2025 COMMON STOCK 2.74K Direct F2, F4, F5
transaction TTEK RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) Options Exercise $0 -2.46K -25.01% $0.00 7.36K Nov 30, 2025 COMMON STOCK 2.46K Direct F2, F4, F6
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Represents the shares withheld to pay the related tax liability of the restricted stock units (RSUs) that vested on November 30, 2025.
F2 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.
F3 The RSUs become vested as to 25% of the shares on November 30, 2026, and 25% annually, thereafter, until fully vested.
F4 The RSUs are exercisable at the time of vesting and do not have a set expiration date.
F5 The RSUs become vested as to 25% of the shares on November 30, 2024, and 25% annually, thereafter, until fully vested.
F6 The RSUs become vested as to 25% of the shares on November 30, 2025, and 25% annually, thereafter, until fully vested.