Brian N. Carter - 18 Nov 2025 Form 4 Insider Report for TETRA TECH INC (TTEK)

Role
SVP, Corporate Controller
Signature
/s/ Preston Hopson, Attorney-in-fact for Brian N. Carter
Issuer symbol
TTEK
Transactions as of
18 Nov 2025
Net transactions value
-$309,471
Form type
4
Filing time
02 Dec 2025, 20:13:01 UTC
Previous filing
03 Dec 2024
Next filing
06 Feb 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
CARTER BRIAN N SVP, Corporate Controller 3475 EAST FOOTHILL BOULEVARD, PASADENA /s/ Preston Hopson, Attorney-in-fact for Brian N. Carter 02 Dec 2025 0001561742

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction TTEK COMMON STOCK Options Exercise $0 +995 +2% $0.000000 50,219 18 Nov 2025 Direct
transaction TTEK COMMON STOCK Options Exercise $0 +1,265 +2.5% $0.000000 51,484 18 Nov 2025 Direct
transaction TTEK COMMON STOCK Tax liability $44,041 -1,234 -2.4% $35.69 50,250 18 Nov 2025 Direct F1
transaction TTEK COMMON STOCK Award $0 +10,954 +22% $0.000000 61,204 18 Nov 2025 Direct F2
transaction TTEK COMMON STOCK Tax liability $213,319 -5,977 -9.8% $35.69 55,227 18 Nov 2025 Direct F3
transaction TTEK COMMON STOCK Options Exercise $0 +1,520 +2.8% $0.000000 56,747 30 Nov 2025 Direct
transaction TTEK COMMON STOCK Options Exercise $0 +1,228 +2.2% $0.000000 57,975 30 Nov 2025 Direct
transaction TTEK COMMON STOCK Tax liability $52,110 -1,500 -2.6% $34.74 56,475 30 Nov 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 -995 -100% $0.000000 0 18 Nov 2025 COMMON STOCK 995 Direct F5, F6, F7
transaction TTEK RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) Options Exercise $0 -1,265 -50% $0.000000 1,265 18 Nov 2025 COMMON STOCK 1,265 Direct F5, F7, F8
transaction TTEK RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) Award $0 +5,612 $0.000000 5,612 19 Nov 2025 COMMON STOCK 5,612 Direct F5, F7, F9
transaction TTEK RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) Options Exercise $0 -1,520 -33% $0.000000 3,030 30 Nov 2025 COMMON STOCK 1,520 Direct F5, F7, F10
transaction TTEK RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) Options Exercise $0 -1,228 -25% $0.000000 3,681 30 Nov 2025 COMMON STOCK 1,228 Direct F5, F7, F11
* 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 18, 2025.
F2 Shares acquired pursuant to vesting of performance stock units earned under 2018 Equity Incentive Plan.
F3 Represents the shares withheld to pay the related tax liability of performance stock units that vested on November 18, 2025.
F4 Represents the shares withheld to pay the related tax liability of the restricted stock units (RSUs) that vested on November 30, 2025.
F5 Represents an award of 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.
F9 The RSUs become vested as to 25% of the shares on November 30, 2026, and 25% annually, thereafter, until fully vested.
F10 The RSUs become vested as to 25% of the shares on November 30, 2024, and 25% annually, thereafter, until fully vested.
F11 The RSUs become vested as to 25% of the shares on November 30, 2025, and 25% annually, thereafter, until fully vested.