Christiana Obiaya - 19 Feb 2026 Form 4 Insider Report for TETRA TECH INC (TTEK)

Reporting relationship: Director
Issuer ticker: TTEK
Reported as of: 19 Feb 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 20 Feb 2026, 19:04:07 UTC
Prior SEC filing: 02 Dec 2025
Source filing: View source filing
Reporting owner signature: /s/ Preston Hopson, Attorney-in-Fact for Christiana Obiaya

Key filing fact

Christiana Obiaya filed Form 4 for TETRA TECH INC (TTEK) on 20 Feb 2026.

Key facts

This page summarizes Christiana Obiaya's Form 4 filing for TETRA TECH INC (TTEK).
2 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 20 Feb 2026, 19:04.

Change

Previous filing in this sequence was filed on 02 Dec 2025.
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 0001902712 Primary reporting owner

Obiaya Christiana

Relationship: Director
Address: 3475 E. FOOTHILL BLVD., PASADENA
Signature: /s/ Preston Hopson, Attorney-in-Fact for Christiana Obiaya
Signature date: 20 Feb 2026

Reported non-derivative transactions

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

TTEK transaction

COMMON STOCK

Options Exercise

Transaction value: $0
Shares: +495
Change %: +5.4%
Price: $0.000000
Shares after: 9,666
Date: 19 Feb 2026
Ownership: Direct

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: -495
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 19 Feb 2026
Ownership: Direct
Underlying class: COMMON STOCK
Underlying amount: 495
Exercise price
Footnotes: F1, F2, F3, F4

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

Additional SEC filing notes

Filing notes and footnotes

Section 16 status

Christiana Obiaya is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may still apply in specific circumstances.

Explanation of responses 4 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

Vesting of the RSUs, which was initially scheduled for November 18, 2026, was accelerated on the Reporting Person's retirement from the Issuer's board of directors.

Footnote F3

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

Footnote F4

Balance of 1,469 RSUs were cancelled upon retirement.