| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| AQUATERRA INTERNATIONAL LIMITED | 04135827 | 02/11/2023 | Silver |
| NAUTILUS LIMITED | 03635033 | 19/11/2024 | Not Trading |
| R P S GROUP LIMITED | 02087786 | 02/11/2023 | Bronze |
| RPS GROUP US HOLDINGS LIMITED | 03030071 | 02/11/2023 | Strike Off |
| RPS TRUSTEES LIMITED | 02880571 | 21/11/2024 | Not Trading |
| TETRA TECH UK HOLDINGS LIMITED | 05909611 | 11/12/2024 | Gold |
| TETRA TECH UK LIMITED | 12241404 | 16/12/2024 | Silver |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| RPS CONSULTING SERVICES LIMITED | 01470149 | 02/11/2023 | 02/11/2024 | Silver |
| RPS ENVIRONMENTAL MANAGEMENT LIMITED | 01756175 | 02/11/2023 | 02/11/2024 | Silver |
| RPS OCCUPATIONAL HEALTH LIMITED | 03829586 | 29/11/2023 | 30/10/2024 | Silver |
| TETRA TECH RPS ENERGY CONSULTANTS LIMITED | 03287074 | 02/11/2023 | 09/07/2024 | Silver |
| TETRA TECH RPS ENERGY LIMITED | 01465554 | 02/11/2023 | 04/10/2024 | Silver |