| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| LE CROSSING COMPANY LIMITED | 04533277 | 01/01/2006 | Dissolved |
| RINGWAY BABTIE LIMITED | 04630708 | 01/01/2006 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BEAR SCOTLAND LIMITED | SC206139 | 05/02/2004 | 28/01/2011 | Bronze |
| CH2M HILL EUROPE LIMITED | 07262036 | 03/06/2019 | 09/12/2020 | One Red Flag |
| CH2M HILL UNITED KINGDOM | 02533469 | 21/03/2018 | 09/12/2020 | Silver |
| HALCROW GROUP LIMITED | 03415971 | 21/03/2018 | 09/12/2020 | Amber |
| HALCROW INTERNATIONAL LIMITED | 02326765 | 03/06/2019 | 09/12/2020 | Amber |
| INSTITUTION OF HIGHWAYS AND TRANSPORTATION(THE) | 00252735 | 04/07/2001 | 27/06/2006 | Not Trading |
| JACOBS ONE LIMITED | SC141100 | 14/03/2018 | 09/12/2020 | Silver |
| JACOBS U.K. LIMITED | 02594504 | 13/04/2011 | 09/12/2020 | Bronze |
| JACOBS UK HOLDINGS LIMITED | 04420029 | 16/11/2016 | 09/12/2020 | Gold |
| LEIGHFISHER HOLDINGS LIMITED | 07462876 | 29/03/2018 | 09/12/2020 | Dissolved |
| LEIGHFISHER LIMITED | 02591354 | 20/03/2018 | 09/12/2020 | Silver |
| RINGWAY JACOBS LIMITED | 05576465 | 01/01/2006 | 01/01/2009 | Silver |
| SIMETRICA-JACOBS LTD | 09035322 | 07/10/2019 | 02/03/2020 | Amber |