TETRA TECH INC (TTEK) Insider Trading & SEC Filings

Updated Jul 16, 2026 · Last SEC filing 2026-06-05

TETRA TECH INC (TTEK) has filed 3 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-06-05. 1 Form 8-K material event filings were reported by TTEK in the last 90 days. InsiderAlpha tracks every TTEK SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.

About TETRA TECH INC (TTEK)

SEC CIK	0000831641

90-Day SEC Filing Activity

Form 4 filings (90d)	3
Form 8-K filings (90d)	1
Latest Form 4 filing	2026-06-05

Recent TTEK Insider Transactions (Form 4)

Date	Insider	Role	Transaction	Shares	Price	Value	Filing
2026-06-04	Volpi Kirsten M	Director	M — Option exercise	1.7K	$9.59	$16K	SEC
2026-05-15	Feeler Jeffrey R	Director	P — Open-market purchase	1.9K	$26.41	$50K	SEC
2026-03-16	Ritrievi Kimberly E	Director	M — Option exercise	2.1K	$0.00	—	SEC
2026-03-16	Ritrievi Kimberly E	Director	M — Option exercise	4.5K	$0.00	—	SEC
2026-03-16	Ritrievi Kimberly E	Director	M — Option exercise	2.0K	$0.00	—	SEC
2026-03-16	Ritrievi Kimberly E	Director	M — Option exercise	1.9K	$0.00	—	SEC
2026-03-16	Ritrievi Kimberly E	Director	A — Grant or award	25.9K	$0.00	—	SEC
2026-03-16	Ritrievi Kimberly E	Director	M — Option exercise	2.2K	$0.00	—	SEC
2026-03-16	Ritrievi Kimberly E	Director	M — Option exercise	795	$0.00	—	SEC
2026-03-16	Ritrievi Kimberly E	Director	M — Option exercise	1.7K	$0.00	—	SEC
2026-03-16	Ritrievi Kimberly E	Director	M — Option exercise	1.9K	$0.00	—	SEC
2026-03-16	Ritrievi Kimberly E	Director	M — Option exercise	2.9K	$0.00	—	SEC
2026-03-16	Ritrievi Kimberly E	Director	M — Option exercise	795	$0.00	—	SEC
2026-02-19	Obiaya Christiana	Director	M — Option exercise	495	$0.00	—	SEC
2026-02-10	Volpi Kirsten M	Director	M — Option exercise	1.0K	$9.59	$10K	SEC

All transactions sourced from SEC EDGAR Form 4 filings for TETRA TECH INC (TTEK). Updated in real time as new filings are submitted to the SEC.

Most-Active TTEK Insiders — Last 90 Days

Insider	Form 4 filings	Total transaction value
Volpi Kirsten M	2	$16K
Feeler Jeffrey R	1	$50K
Thornburg Eric W	1	—

Recent TTEK Form 8-K Material Events

2026-04-29 — Item 2.02, 8.01, 9.01 [SEC]
2026-03-26 — Item 5.02, 8.01, 9.01 · Leadership · neutral [SEC]
Tetra Tech announced the appointment of Eric W. Thornburg to its Board of Directors, effective March 30, 2026, expanding the board to eight members. Thornburg brings extensive experience as former CEO of H20 America and Connecticut Water Service, and will serve on the Compensatio
2026-02-20 — Item 5.02, 5.07, 9.01 · Leadership · neutral [SEC]
Roger R. Argus was appointed to Tetra Tech's Board of Directors on February 19, 2026, following his previously announced promotion to Chief Executive Officer. Argus is a 30+ year company veteran who was promoted from President (a position he held since October 2025) to CEO. The c

Recent Insider Filings

2026-06-05 — Volpi Kirsten M (Director)
2026-05-15 — Feeler Jeffrey R (Director)
2026-04-28 — Thornburg Eric W (Director)
2026-03-19 — Ritrievi Kimberly E (Director)
2026-02-21 — Obiaya Christiana (Director)

Form 4 Transaction Code Reference

SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in TTEK insider filings:

P	Open-market purchase by the insider
S	Open-market sale by the insider
A	Grant, award, or other acquisition from the issuer
M	Exercise or conversion of derivative security (e.g. options)
F	Payment of exercise price or tax liability via share withholding
G	Bona-fide gift of securities
D	Disposition to the issuer (e.g. share buyback participation)
J	Other acquisition or disposition
X	Exercise of in-the-money or at-the-money derivative security
C	Conversion of derivative security
V	Transaction voluntarily reported earlier than required

TTEK Insider Trading — FAQ

What is the latest insider trade for TTEK?: TETRA TECH INC (TTEK) had 3 insider filings in the last 90 days, with the most recent on 2026-06-05. InsiderAlpha tracks every Form 4, 10-K, 10-Q, and 8-K filing in real time.
How many insiders are buying TTEK stock?: 0 insider purchases of TTEK were filed in the last 90 days.
How many insiders are selling TTEK stock?: 0 insider sales of TTEK were filed in the last 90 days.
Where can I see TTEK SEC filings (Form 4, 10-K, 10-Q, 8-K)?: InsiderAlpha aggregates every TTEK SEC filing — Form 4 insider transactions, 10-K and 10-Q quarterly reports, and 8-K material event disclosures — in one timeline.

Learn More

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