Preston Hopson - Nov 18, 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 18, 2025
Transactions value $
-$372,140
Form type
4
Date filed
11/20/2025, 06:43 PM
Previous filing
Dec 3, 2024
Next filing
Dec 2, 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 2025-11-20 0001728969

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction TTEK COMMON STOCK Options Exercise $0 +2.06K +3.21% $0.00 66K Nov 18, 2025 Direct F1
transaction TTEK COMMON STOCK Options Exercise $0 +2.54K +3.84% $0.00 68.5K Nov 18, 2025 Direct
transaction TTEK COMMON STOCK Tax liability -$64.5K -1.81K -2.64% $35.69 66.7K Nov 18, 2025 Direct F2
transaction TTEK COMMON STOCK Award $0 +21.9K +32.83% $0.00 88.6K Nov 18, 2025 Direct F3
transaction TTEK COMMON STOCK Tax liability -$308K -8.62K -9.73% $35.69 80K Nov 18, 2025 Direct F4

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) Options Exercise $0 -2.06K -100% $0.00 0 Nov 18, 2025 COMMON STOCK 2.06K Direct F5, F6, F7
transaction TTEK RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) Options Exercise $0 -2.54K -50% $0.00 2.54K Nov 18, 2025 COMMON STOCK 2.54K Direct F5, F7, F8
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Amount of securities beneficially owned was updated to reflect that 149 shares of common stock were acquired by the Reporting Person on December 15, 2024, pursuant to the Tetra Tech, Inc. Employee Stock Purchase Plan (ESPP).
F2 Represents the shares withheld to pay the related tax liability of the restricted stock units (RSUs) that vested on November 18, 2025.
F3 Shares acquired pursuant to vesting of performance stock units earned under 2018 Equity Incentive Plan.
F4 Represents the shares withheld to pay the related tax liability of performance stock units that vested on November 18, 2025.
F5 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.
F6 The RSUs become vested as to 25% of the shares on November 18, 2022, and 25% annually, thereafter, until fully vested.
F7 The RSUs are exercisable at the time of vesting and do not have a set expiration date.
F8 The RSUs become vested as to 25% of the shares on November 18, 2023, and 25% annually, thereafter, until fully vested.