| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ATK ENERGY EU LIMITED | 05613520 | 11/04/2016 | Bronze |
| ATKINS (US) | 04441585 | 01/07/2014 | Dissolved |
| ATKINS ABG LIMITED | 04110625 | 01/07/2014 | Dissolved |
| ATKINS ADVANTAGE BUSINESS SOLUTIONS LIMITED | 02811042 | 01/07/2014 | Dissolved |
| ATKINS ADVANTAGE SYSTEM SOLUTIONS LIMITED | 02541313 | 01/07/2014 | Dissolved |
| ATKINS ADVANTAGE TECHNICAL CONSULTING LIMITED | 05085123 | 01/07/2014 | Dissolved |
| ATKINS INTELLIGENT SPACE PARTNERSHIP LIMITED | 05609795 | 01/07/2014 | Dissolved |
| ATKINS INVESTMENTS LIMITED | 03716738 | 01/07/2014 | Dissolved |
| ATKINS MANTIX EBT LIMITED | 05455544 | 01/07/2014 | Dissolved |
| ATKINS MANTIX GROUP LIMITED | 05244379 | 01/07/2014 | Dissolved |
| ATKINS MANTIX LIMITED | 02110910 | 01/07/2014 | Dissolved |
| ATKINS PLANNING & MANAGEMENT CONSULTANTS LIMITED | 00819139 | 01/07/2014 | Dissolved |
| ATKINSRÉALIS (WS) LIMITED | 01885586 | 01/07/2014 | Gold |
| ATKINSRÉALIS ATK INVESTMENTS LIMITED | 04404511 | 01/07/2014 | Bronze |
| ATKINSRÉALIS ATK LIMITED | 08850358 | 01/07/2014 | Silver |
| ATKINSRÉALIS CONSULTANCY SERVICES LIMITED | 07470137 | 01/07/2014 | Amber |
| ATKINSRÉALIS INTERNATIONAL HOLDINGS LIMITED | 06434611 | 01/07/2014 | Amber |
| ATKINSRÉALIS INVESTMENTS UK LIMITED | 05313134 | 01/07/2014 | Silver |
| ATKINSRÉALIS KINS HOLDINGS LIMITED | 00688415 | 01/07/2014 | Not Trading |
| ATKINSRÉALIS PPS HOLDINGS LIMITED | 02991351 | 01/07/2014 | Silver |
| ATKINSRÉALIS PPS LIMITED | 02236832 | 01/07/2014 | Gold |
| ATKINSRÉALIS UK INTERNATIONAL LIMITED | 01091953 | 01/07/2014 | Silver |
| ATKINSRÉALIS UK LIMITED | 00688424 | 01/07/2014 | Silver |
| ATMOS LIMITED | 00916423 | 01/07/2014 | Dissolved |
| CARNELIAN LIMITED | 03288677 | 01/07/2014 | Dissolved |
| DGI GROUP LIMITED | 02024031 | 01/07/2014 | Dissolved |
| DGI INTERNATIONAL LIMITED | 01483124 | 01/07/2014 | Dissolved |
| HANSCOMB (RUSSIA) LIMITED | 03971914 | 01/07/2014 | Dissolved |
| HANSCOMB (UK) LIMITED | 03890509 | 01/07/2014 | Dissolved |
| HANSCOMB EUROPE LIMITED | 03896620 | 01/07/2014 | Dissolved |
| KINS DEVELOPMENTS LIMITED | 00688414 | 01/07/2014 | Dissolved |
| LONDON GROUP PROJECTS LIMITED | 03920092 | 01/07/2014 | Dissolved |
| NETWORK TRAIN ENGINEERING SERVICES LIMITED | 03062723 | 01/07/2014 | Dissolved |
| OPAL ENGINEERING LIMITED | 03204631 | 01/07/2014 | Dissolved |
| SILK AND FRAZIER LIMITED | 03385244 | 01/07/2014 | Dissolved |
| TA GROUP LIMITED | 05087238 | 01/07/2014 | Dissolved |
| VENTRON TECHNOLOGY LIMITED | 01036947 | 01/07/2014 | Dissolved |
| WOOTTON JEFFREYS CONSULTANTS LIMITED | 02422683 | 01/07/2014 | Dissolved |
| WS ATKINS (SERVICES) LIMITED | 04370899 | 01/07/2014 | Dissolved |
| WS ATKINS ARCHITECTS LIMITED | 02647324 | 01/07/2014 | Dissolved |
| WS ATKINS CEDAC LIMITED | 03035951 | 01/07/2014 | Dissolved |
| WS ATKINS EMPLOYMENT SERVICES LIMITED | 01784595 | 01/07/2014 | Dissolved |
| WS ATKINS POWERTRACK LIMITED | 03033350 | 01/07/2014 | Dissolved |
| WS ATKINS PROPERTY SERVICES LIMITED | 02684178 | 01/07/2014 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ATK ENERGY EU SERVICES LIMITED | 05462826 | 11/04/2016 | 16/08/2024 | Dissolved |
| ATKINS BENNETT (HOLDINGS) LIMITED | 06546169 | 01/07/2014 | 07/04/2022 | Dissolved |
| ATKINS BENNETT LIMITED | 01797126 | 01/07/2014 | 07/04/2022 | Dissolved |
| ATKINS MSL ENGINEERING LIMITED | 02581102 | 01/07/2014 | 15/06/2022 | Dissolved |
| ATKINS ULC | 07465328 | 01/07/2014 | 29/09/2020 | Dissolved |
| ATKINSR?ALIS UK HOLDINGS LIMITED | 03754382 | 01/07/2014 | 01/10/2024 | Insolvent |
| ATKINSRÉALIS BROOMCO LIMITED | 03097696 | 01/07/2014 | 01/10/2024 | Insolvent |
| ATKINSRÉALIS CONSULTANTS LIMITED | 00755613 | 01/07/2014 | 07/04/2022 | Dissolved |
| ATKINSRÉALIS RAIL LIMITED | 01026689 | 01/07/2014 | 14/02/2022 | Silver |
| CONFAB LIMITED | 00755561 | 01/07/2014 | 07/04/2022 | Dissolved |
| PARFAB LIMITED | 00755581 | 01/07/2014 | 07/04/2022 | Dissolved |
| W.S. ATKINS (NO. 3 TRUSTEES) LIMITED | 02669866 | 01/07/2014 | 15/06/2022 | Dissolved |
| W.S. ATKINS (TRUSTEES) LIMITED | 02047084 | 01/07/2014 | 15/06/2022 | Dissolved |
| WS ATKINS QUEST TRUSTEE LIMITED | 03491253 | 01/07/2014 | 15/06/2022 | Dissolved |