Gary Birkenbeuel - 01 Jan 2025 Form 4 Insider Report for TETRA TECH INC (TTEK)

Reporting relationship: Director
Issuer ticker: TTEK
Reported as of: 01 Jan 2025
Net transaction value: $0
SEC form: 4
Accepted by SEC: 14 Jan 2026, 16:26:42 UTC
Prior SEC filing: 22 Nov 2024
Next SEC filing: 15 Aug 2025
Source filing: View source filing
Reporting owner signature: /s/ Preston Hopson, Attorney-in-fact for Gary Birkenbeuel

Key filing fact

Gary Birkenbeuel filed Form 4 for TETRA TECH INC (TTEK) on 14 Jan 2026.

Key facts

This page summarizes Gary Birkenbeuel's Form 4 filing for TETRA TECH INC (TTEK).
6 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 14 Jan 2026, 16:26.

Change

Previous filing in this sequence was filed on 22 Nov 2024.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001748476 Primary reporting owner

Birkenbeuel Gary

Relationship: Director
Address: 3475 EAST FOOTHILL BLVD., PASADENA
Signature: /s/ Preston Hopson, Attorney-in-fact for Gary Birkenbeuel
Signature date: 14 Jan 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

TTEK transaction

COMMON STOCK

Award

Transaction value: $0
Shares: +5,270
Change %: +14%
Price: $0.000000
Shares after: 42,995
Date: 01 Jan 2025
Ownership: Direct
Footnotes: F1, F2

TTEK transaction

COMMON STOCK

Options Exercise

Transaction value: $0
Shares: +2,050
Change %: +4.8%
Price: $0.000000
Shares after: 45,045
Date: 01 Jan 2025
Ownership: Direct

TTEK transaction

COMMON STOCK

Options Exercise

Transaction value: $0
Shares: +1,590
Change %: +3.5%
Price: $0.000000
Shares after: 46,635
Date: 12 Jan 2026
Ownership: Direct

TTEK transaction

COMMON STOCK

Award

Transaction value: $0
Shares: +4,397
Change %: +9.4%
Price: $0.000000
Shares after: 51,032
Date: 12 Jan 2026
Ownership: Direct
Footnotes: F2, F3

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

TTEK transaction Derivative

RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)

Options Exercise

Transaction value: $0
Shares: -2,050
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 01 Jan 2025
Ownership: Direct
Underlying class: COMMON STOCK
Underlying amount: 2,050
Exercise price
Footnotes: F4, F5, F6, F7

TTEK transaction Derivative

RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)

Options Exercise

Transaction value: $0
Shares: -1,590
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 12 Jan 2026
Ownership: Direct
Underlying class: COMMON STOCK
Underlying amount: 1,590
Exercise price
Footnotes: F4, F7, F8, F9

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 9 footnotes

Footnote F1

The PSUs vested on 11/21/2023 but were deferred pursuant to the Issuer's Deferred Compensation Plan and settled according to the Reporting Person's elected distribution schedule.

Footnote F2

Shares acquired pursuant to vesting of performance stock units earned under 2018 Equity Incentive Plan.

Footnote F3

The PSUs vested on 11/20/2024 but were deferred pursuant to the Issuer's Deferred Compensation Plan and settled according to the Reporting Person's elected distribution schedule.

Footnote F4

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.

Footnote F5

On September 6, 2024, the balance of 410 shares was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 1,640 shares of common stock.

Footnote F6

The restricted stock units (RSUs) became 100% vested as to the shares underlying the RSUs on November 18, 2021, but were deferred pursuant to the Issuer's Deferred Compensation Plan and settled according to the Reporting Person's elected distribution schedule.

Footnote F7

The RSUs are exercisable at the time of vesting and do not have a set expiration date.

Footnote F8

On September 6, 2024, the balance of 318 shares was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 1,272 shares of common stock.

Footnote F9

The restricted stock units (RSUs) became 100% vested as to the shares underlying the RSUs on November 18, 2022, but were deferred pursuant to the Issuer's Deferred Compensation Plan and settled according to the Reporting Person's elected distribution schedule.