Tetra Tech TTEK Insider Ownership

NASDAQ TTEK

$36.98 +0.17 (+0.46%)

At close: Oct 23, 2026 · 4:00 PM EDT

Insider Holdings by Owner

2.26Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

0.541%

▲+0.0009% pp QoQ

Shares Held by Insiders

1.40Mn

filed for Sep 2026

▲+0.16% QoQ

Shares Outstanding

258.15Mn

258,151,000 shares

Direct Holdings

1.40Mn

Indirect: 0

Net Shares Traded (QoQ)

+2.30K

net buying in Sep 2026

Insiders Holding Shares

with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold

Latest quarter —

Net over range —

Buying quarters —

Insider Ownership Summary

Updated Oct 10, 2026

In the last 12 months, insiders at Tetra Tech made open-market purchases of $50,179 (1.9K shares) and open-market sales of $401,405 (9.98K shares).

Among Tetra Tech's insiders, Jeffrey R. Feeler (Director) was the largest open-market buyer over the past 12 months, purchasing $50,179 of stock (1.9K shares), most recently on May 15, 2026.
On the sell side, Brian N. Carter (SVP, Corporate Controller) led open-market sales of Tetra Tech stock over the past 12 months with $401,405 (9.98K shares), most recently on February 4, 2026.
Beyond open-market trades, insiders at Tetra Tech received 260.36K shares in stock awards, acquired 133.65K shares through option exercises and conversions, gave up 195.95K shares to cover taxes or exercise prices and gave away 11.1K shares as gifts in the last 12 months.
Business Quant data puts insider holdings in TTEK at 1.3Mn shares across insiders' latest Form 4 filings, up 5.68% from 1.23Mn shares at the end of Q3 2025.
By type of ownership, TTEK insiders hold all of their 1.3Mn shares directly.
The insider holdings in Tetra Tech belong to 13 insiders who have reported on Form 4 within the past two years.
Tetra Tech's three biggest insider holders are Dan L. Batrack (Chairman and & CEO, 332.5K shares), Leslie L. Shoemaker (EVP, Chief Sustainability, 325.82K shares) and Kimberly E. Ritrievi (Director, 192.26K shares), based on their latest Form 4 filings.
Dan L. Batrack alone accounts for 25.60% of the shares held by Tetra Tech insiders.
Institutional holders reported 97.77% of Tetra Tech's outstanding shares for Q2 2026; insiders' latest Form 4 filings put their stake at about 0.50%, and other investors, including the public, hold the remaining 1.73%.
Over the trailing 12 months, 14 insiders reported transactions in TTEK stock across 32 Form 4 filings.
The insider data for TTEK reflects Form 4 filings through August 6, 2026.

Form 4 Holdings

Insiders Holding TTEK

Insiders 21

Shares held 2.26Mn

Of outstanding 0.875%

#	Insider	Position	Direct	Total	Share of Insiders	Last Filed
1	William R Brownlie	Svp, Chief Engineer	426,880	426,880	18.9%	21 Mar, 2022
2	Dan L Batrack	Chairman And Ceo	332,498	332,498	14.7%	02 Dec, 2025
3	Leslie L Shoemaker	Evp, Chief Sustainability	325,821	325,821	14.4%	02 Dec, 2025
4	J Christopher Lewis	Director	289,375	289,375	12.8%	16 Dec, 2022
5	Kimberly E Ritrievi	Director	192,259	192,259	8.5%	18 Mar, 2026
6	Steven M Burdick	Evp, Cfo	138,251	138,251	6.1%	06 Feb, 2026
7	Joanne M Maguire	Director	97,785	97,785	4.3%	02 Oct, 2024
8	Preston Hopson	Evp, Chief Legal/Human Capital	83,142	83,142	3.7%	02 Dec, 2025
9	Kirsten M Volpi	Director	74,218	74,218	3.3%	06 Aug, 2026
10	Derek G Amidon	Svp, Comm./Int'L Svcs. Group	55,705	55,705	2.5%	22 Nov, 2022
11	J Kenneth Thompson	Director	54,925	54,925	2.4%	16 Feb, 2024
12	Brian N Carter	Svp, Corporate Controller	46,496	46,496	2.1%	06 Feb, 2026
13	Roger R Argus	President	39,890	39,890	1.8%	02 Dec, 2025
14	Gary Birkenbeuel	Director	37,725	37,725	1.7%	15 Aug, 2025
15	Prashant Gandhi	Director	16,553	16,553	0.7%	02 Dec, 2025
16	Patrick C Haden	Director	15,310	15,310	0.7%	21 Mar, 2022
17	Jill Hudkins	President	12,620	12,620	0.6%	28 Nov, 2023
18	Christiana Obiaya	Director	9,666	9,666	0.4%	20 Feb, 2026
19	Brendan M. O'Rourke	Svp, Enterprise Risk Mgmt.	6,720	6,720	0.3%	31 Jan, 2022
20	Jeffrey R Feeler	Director	1,900	1,900	0.1%	15 May, 2026
21	John M. Douglas	Director	610	610	0.0%	03 Mar, 2025

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

3,959 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
04 Aug, 2026	Kirsten M Volpi	Director	Acquired M	2,300	$9.59	$22.06K	74,218	Direct
04 Aug, 2026	Kirsten M Volpi	Director	Disposed M	2,300	$0.00	$0	4,000	Direct
04 Jun, 2026	Kirsten M Volpi	Director	Acquired M	1,700	$9.59	$16.30K	71,918	Direct
04 Jun, 2026	Kirsten M Volpi	Director	Disposed M	1,700	$0.00	$0	6,300	Direct
15 May, 2026	Jeffrey R Feeler	Director	Acquired P	1,900	$26.41	$50.18K	1,900	Direct
27 Apr, 2026	Eric W Thornburg	Director	Acquired A	1,259	$0.00	$0	1,259	Direct
16 Mar, 2026	Kimberly E Ritrievi	Director	Acquired M	4,500	$0.00	$0	149,908	Direct
16 Mar, 2026	Kimberly E Ritrievi	Director	Acquired M	2,250	$0.00	$0	152,158	Direct
16 Mar, 2026	Kimberly E Ritrievi	Director	Acquired M	1,925	$0.00	$0	154,083	Direct
16 Mar, 2026	Kimberly E Ritrievi	Director	Acquired M	2,910	$0.00	$0	156,993	Direct
16 Mar, 2026	Kimberly E Ritrievi	Director	Acquired M	2,050	$0.00	$0	159,043	Direct
16 Mar, 2026	Kimberly E Ritrievi	Director	Acquired M	795	$0.00	$0	159,838	Direct
16 Mar, 2026	Kimberly E Ritrievi	Director	Acquired M	795	$0.00	$0	160,633	Direct
16 Mar, 2026	Kimberly E Ritrievi	Director	Acquired M	1,900	$0.00	$0	162,533	Direct
16 Mar, 2026	Kimberly E Ritrievi	Director	Acquired M	2,125	$0.00	$0	164,658	Direct
16 Mar, 2026	Kimberly E Ritrievi	Director	Acquired M	1,718	$0.00	$0	166,376	Direct
16 Mar, 2026	Kimberly E Ritrievi	Director	Acquired A	25,883	$0.00	$0	192,259	Direct
16 Mar, 2026	Kimberly E Ritrievi	Director	Disposed M	4,500	$0.00	$0	0	Direct
16 Mar, 2026	Kimberly E Ritrievi	Director	Disposed M	2,250	$0.00	$0	2,250	Direct
16 Mar, 2026	Kimberly E Ritrievi	Director	Disposed M	1,925	$0.00	$0	1,925	Direct

Showing 1 to 20 of 3,959 transactions