BATRACK DAN L 4

4 · TETRA TECH INC · Filed Nov 20, 2025

Form 4

Period: 2025-11-18

DirectorCHIEF EXECUTIVE OFFICER

Transactions

Exercise/Conversion
RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)
2025-11-18−19,015→ 19,010 total
From: 2023-11-18→ COMMON STOCK (19,015 underlying)
Exercise/Conversion
COMMON STOCK
2025-11-18+14,030→ 239,897 total
Tax Payment
COMMON STOCK
2025-11-18$35.69/sh−18,235$650,807→ 240,677 total
Exercise/Conversion
RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)
2025-11-18−14,030→ 0 total
From: 2022-11-18→ COMMON STOCK (14,030 underlying)
Tax Payment
COMMON STOCK
2025-11-18$35.69/sh−90,653$3,235,406→ 314,309 total
Exercise/Conversion
COMMON STOCK
2025-11-18+19,015→ 258,912 total
Award
COMMON STOCK
2025-11-18+164,285→ 404,962 total

Footnotes (8)

[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.

Documents

1 file