Eric W. Thornburg - 27 Apr 2026 Form 4 Insider Report for TETRA TECH INC (TTEK)

Reporting relationship: Director
Issuer ticker: TTEK
Reported as of: 27 Apr 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 28 Apr 2026, 19:35:33 UTC
Prior SEC filing: 03 Apr 2026
Source filing: View source filing
Reporting owner signature: /s/ Preston Hopson, Attorney-in-fact for Eric W. Thornburg

Key filing fact

Eric W. Thornburg filed Form 4 for TETRA TECH INC (TTEK) on 28 Apr 2026.

Key facts

This page summarizes Eric W. Thornburg's Form 4 filing for TETRA TECH INC (TTEK).
1 reported transaction and 1 derivative row are listed below.
Accepted by SEC: 28 Apr 2026, 19:35.

Change

Previous filing in this sequence was filed on 03 Apr 2026.
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 0001349767 Primary reporting owner

Thornburg Eric W

Relationship: Director
Address: 3475 E. FOOTHILL BLVD, PASADENA
Signature: /s/ Preston Hopson, Attorney-in-fact for Eric W. Thornburg
Signature date: 28 Apr 2026

Reported derivative securities

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

TTEK transaction Derivative

RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)

Award

Transaction value
Shares: +1,259
Change %
Price: $0.000000^*
Shares after: 1,259
Date: 27 Apr 2026
Ownership: Direct
Underlying class: COMMON STOCK
Underlying amount: 1,259
Exercise price
Footnotes: F1, F2, F3

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

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 F2

The RSUs become 100% vested as to the shares underlying the RSUs on April 27, 2027.

Footnote F3

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