Tetra Tech, Inc. (TTEK)
Nasdaq: TTEK · Services-Engineering Services · Pasadena, CA · filing with the SEC since 1995
Grade6.0
◀ Past 7.4● Present 5.6▶ Future 4.3
Who owns Tetra Tech, Inc.
As filed with the SECHolders of 5% or more
2
Blackrock, Inc. holds 9.7% of Common Stock, as its SCHEDULE 13G/A filed Feb 6, 2025 says.
Directors and officers
14
report now, of 34 people on the record since 2006. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 2 named at left.
Holders of 5% or moreshare of the class, as filed
Blackrock, Inc.
SCHEDULE 13G/A · filed Feb 6, 2025 · Common Stock
Vanguard Capital Management
SCHEDULE 13G · filed Apr 30, 2026 · Common Stock
Pictet Asset Management SA
SCHEDULE 13D/A · filed Oct 17, 2025 · COMMON STOCK · reported falling below 5%, from 5.3% in Apr 15, 2025
The Vanguard Group
SCHEDULE 13G/A · filed Mar 27, 2026 · Common Stock · reported falling below 5%, from 10.1% in Apr 7, 2025
What TTEK reports owning in othersstakes of 5% or more, and other ties
Other ties the annual report names
LS Technologies
A company bought · acquisition · Mar 2024 · owns, named in the 10-K filed Nov 20, 2025
RPS Group PLC
A company bought · acquisition · Jan 2023 · owns, named in the 10-K filed Nov 20, 2025
24 subsidiaries in 4 countries, from the list filed with the 10-K filed Nov 20, 2025.
Insider tradesForm 4
1sales
1purchases
0sales on a scheduled plan
1people selling
$400,000sold, in dollars
$100,000bought, in dollars
Open-market trades on Form 4 from Sep 30, 2025 to Sep 30, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Sep 30, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window2 of 34 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Carter Brian N | SVP, Corporate Controller | 1 | $400,000 | 0 | 0 | $0 |
| Feeler Jeffrey R | director | 0 | $0 | 0 | 1 | $100,000 |