On the Record · Tetra Tech
Tetra Tech subsidiaries, as it lists them
The subsidiaries Tetra Tech lists in its latest annual report, with the jurisdiction of each, linked to the filing.
Subsidiaries it lists
| Subsidiary | Jurisdiction |
|---|---|
| Advanced Management Technology, Inc. | Virginia |
| Amyx, Inc. | Delaware |
| ARD, Inc. | Vermont |
| Ardaman & Associates, Inc. | Florida |
| BlueWater Federal Solutions, Inc. | Delaware |
| Cosentini Associates, Inc. | New York |
| Global Tech Inc. | Virginia |
| Glumac | California |
| LS Technologies, LLC | Virginia |
| Management Systems International, Inc. | District of Columbia |
| Rooney Engineering, Inc. | Colorado |
| R P S Group Limited | United Kingdom |
| Segue Technologies, Inc. | Virginia |
| Tetra Tech Australia Pty Ltd | Australia |
| Tetra Tech Australia Group Holdings Pty Ltd. | Australia |
| Tetra Tech BAS, Inc. | California |
| Tetra Tech Canada Holding Corporation | Canada |
| Tetra Tech Canada, Inc. | Canada |
| Tetra Tech EC, Inc. | Delaware |
| Tetra Tech EMC, Inc. | California |
| Tetra Tech ES, Inc. | Delaware |
| Tetra Tech Holding LLC | Delaware |
| Tetra Tech UK Holdings Limited | United Kingdom |
| The Kaizen Company, LLC | District of Columbia |
From Exhibit 21 of the 10-K for 2025. Companies must list their significant subsidiaries there and may leave out smaller ones, so this is the company’s own list, not every entity it owns.
Read from Tetra Tech’s annual reports (10-K for 2025, 10-K for 2024, 10-K for 2023) and the financial data it files with the SEC, as of 2025-11-20. Every quotation is word for word from the filing linked beside it; how these pages are built and checked. The full record is in its company data sheet.