| W.CROWDER & SONS LIMITEDopenregistry-gb-01069525 | Active | FULL | ORDINARY | 5,565 | 100.00% | 100.00% | 100.00% | 2024-05-02 |
| RICHARD ALLITT ASSOCIATES LIMITEDopenregistry-gb-03255404 | Active | AUDIT EXEMPTION SUBSIDIARY | ORDINARY | 1,290 | 100.00% | 100.00% | 100.00% | 2023-09-28 |
| CARBON ZERO CONSULTING LTDopenregistry-gb-03320795 | Active | AUDIT EXEMPTION SUBSIDIARY | ORDINARY | 102 | 100.00% | 100.00% | 100.00% | 2023-02-21 |
| CS2 LIMITEDopenregistry-gb-03888977 | Active | SMALL | ORDINARY | 102,128 | 100.00% | 100.00% | 100.00% | 2023-01-04 |
| ELSYM INSTALLATIONS LIMITEDopenregistry-gb-04070943 | Active | TOTAL EXEMPTION FULL | ORDINARY | 100 | 100.00% | 100.00% | 100.00% | 2025-09-08 |
| AURORA HEALTH PHYSICS SERVICES LIMITEDopenregistry-gb-04276316 | Active | SMALL | ORDINARY | 875 | 100.00% | 100.00% | 100.00% | 2024-09-09 |
| BTS GROUP LIMITEDopenregistry-gb-04299486 | Active | FULL | ORDINARY | 52,632 | 100.00% | 100.00% | 100.00% | 2023-10-31 |
| MG SCAFFOLDING (OXFORD) LIMITEDopenregistry-gb-04543435 | Active | SMALL | ORDINARY | 205 | 100.00% | 100.00% | 100.00% | 2023-01-04 |
| KENDALL KINGSCOTT LIMITEDopenregistry-gb-04605743 | Active | FULL | ORDINARY | 138,351 | 100.00% | 100.00% | 100.00% | 2026-01-16 |
| HYDROFIX LIMITEDopenregistry-gb-04713320 | Active | SMALL | ORDINARY | 108 | 100.00% | 100.00% | 100.00% | 2023-07-04 |
| MILESTONE COMMUNICATIONS LIMITEDopenregistry-gb-05542487 | Active | FULL | ORDINARY | 1,250 | 100.00% | 100.00% | 100.00% | 2023-08-31 |
| CENTRAL ALLIANCE PRE CONSTRUCTION SERVICES LTDopenregistry-gb-05769713 | Active | FULL | ORDINARY | 4,000,340 | 100.00% | 100.00% | 100.00% | 2025-02-19 |
| GHI RENEWABLES LIMITEDopenregistry-gb-05942386 | Active | AUDIT EXEMPTION SUBSIDIARY | ORDINARY | 100 | 100.00% | 100.00% | 100.00% | 2023-09-28 |
| 1ST INRAIL LIMITEDopenregistry-gb-06252002 | Active | FULL | ORDINARY | 75 | 100.00% | 100.00% | 100.00% | 2024-06-03 |
| APOLLO STRATEGIC COMMUNICATIONS LIMITEDopenregistry-gb-06563797 | Active | SMALL | ORDINARY | 4 | 100.00% | 100.00% | 100.00% | 2025-09-25 |
| ENVIREAU LTDopenregistry-gb-06647619 | Active | SMALL | ORDINARY | 85 | 100.00% | 100.00% | 100.00% | 2022-07-15 |
| RSK ACOUSTICS LIMITEDopenregistry-gb-07102436 | Active | AUDIT EXEMPTION SUBSIDIARY | ORDINARY | 13,052 | 100.00% | 100.00% | 100.00% | 2022-12-22 |
| COPELAND WEDGE ASSOCIATES LTDopenregistry-gb-07709882 | Active | DORMANT | ORDINARY | 15,000 | 100.00% | 100.00% | 100.00% | 2023-07-13 |
| PD&MS HOLDINGS LIMITEDopenregistry-gb-08451993 | Active | AUDIT EXEMPTION SUBSIDIARY | ORDINARY | 1 | 100.00% | 100.00% | 100.00% | 2026-04-09 |
| FELLOWS CONSTRUCTION CONSULTANTS LTDopenregistry-gb-08722651 | Active | SMALL | ORDINARY | 940 | 100.00% | 100.00% | 100.00% | 2023-10-12 |
| EDP CONSULTANTS LTDopenregistry-gb-09114212 | Active | SMALL | ORDINARY | 1,435 | 100.00% | 100.00% | 100.00% | 2023-07-03 |
| JB SITE INVESTIGATIONS LIMITEDopenregistry-gb-10057964 | Active | AUDIT EXEMPTION SUBSIDIARY | ORDINARY | 1 | 100.00% | 100.00% | 100.00% | 2026-04-28 |
| OPTISOL SERVICES LTDopenregistry-gb-10212112 | Active | SMALL | ORDINARY | 200 | 100.00% | 100.00% | 100.00% | 2023-01-17 |
| RSK ADAS LIMITEDopenregistry-gb-10486936 | Active | FULL | ORDINARY | 4,000,100 | 100.00% | 100.00% | 100.00% | 2024-12-06 |
| WATER RESEARCH CENTRE LIMITEDopenregistry-gb-11172223 | Active | FULL | ORDINARY | 4,050,000 | 100.00% | 100.00% | 100.00% | 2025-02-11 |
| ARGRENNAN ESTATE LIMITEDopenregistry-gb-13876305 | Active | AUDIT EXEMPTION SUBSIDIARY | ORDINARY | 4,500,100 | 100.00% | 100.00% | 100.00% | 2025-02-24 |
| DWD PROPERTY AND PLANNING LIMITEDopenregistry-gb-15174312 | Active | FULL | ORDINARY | 3,000,100 | 100.00% | 100.00% | 100.00% | 2024-10-01 |
| AJ ENGINEERING & CONSTRUCTION SERVICES LIMITEDopenregistry-gb-SC188199 | Active | GROUP | ORDINARY | 25,000 | 100.00% | 100.00% | 100.00% | 2025-07-30 |
| GLOBAL RAIL CONSTRUCTION LIMITED ▼openregistry-gb-04272798 | Active | FULL | ORDINARY | 2 | 100.00% | 100.00% | 100.00% | 2024-09-10 |
| RSK INVESTMENTS LIMITED ▼openregistry-gb-04500781 | Active | DORMANT | A ORDINARY | 505,017 | 100.00% | 100.00% | 100.00% | 2025-08-12 |
| BATEMAN SKIPS LTD ▼openregistry-gb-04934307 | Active | FULL | ORDINARY | 400 | 100.00% | 100.00% | 100.00% | 2024-10-31 |
| SALIX RIVER & WETLAND SERVICES LIMITED ▼openregistry-gb-04944506 | Active | SMALL | ORDINARY | 40,148 | 100.00% | 100.00% | 100.00% | 2023-10-31 |
| UP AND UNDER GROUP LIMITED ▼openregistry-gb-05435793 | Active | SMALL | ORDINARY | 200 | 100.00% | 100.00% | 100.00% | 2023-04-26 |
| MSS GROUP LIMITED ▼openregistry-gb-05486864 | Active | GROUP | ORDINARY | 307,695 | 100.00% | 100.00% | 100.00% | 2023-06-22 |
| WYSE GROUP LIMITED ▼openregistry-gb-05665971 | Active | DORMANT | ORDINARY | 116,666 | 100.00% | 100.00% | 100.00% | 2023-06-15 |
| EB7 LIMITED ▼openregistry-gb-06434420 | Active | SMALL | ORDINARY | 31,636,630 | 100.00% | 100.00% | 100.00% | 2025-04-17 |
| AXIS WELL TECHNOLOGY GROUP LIMITED ▼openregistry-gb-08430347 | Active | FULL | ORDINARY | 139,456,795 | 100.00% | 100.00% | 100.00% | 2024-03-21 |
| PROJECT IRES TOPCO LIMITED ▼openregistry-gb-09113299 | Active | AUDIT EXEMPTION SUBSIDIARY | ORDINARY | 7,107,723 | 100.00% | 100.00% | 100.00% | 2024-07-02 |
| BMG RESEARCH HOLDINGS LIMITED ▼openregistry-gb-10236510 | Active | DORMANT | ORDINARY | 1 | 100.00% | 100.00% | 100.00% | 2025-03-28 |
| CALIBRATE GROUP LIMITED ▼openregistry-gb-12572433 | Active | DORMANT | ORDINARY | 20,513 | 100.00% | 100.00% | 100.00% | 2024-01-16 |
| CX GROUP HOLDINGS LIMITED ▼openregistry-gb-14655804 | Active | DORMANT | ORDINARY | 100,000 | 100.00% | 100.00% | 100.00% | 2024-02-22 |
| ELECTROKINETIC LIMITEDopenregistry-gb-04183422 | Active | DORMANT | DEFERRED | 8,617,547 | 100.00% | 99.69% | 100.00% | 2024-04-04 |
| ORDINARY | 27,220 | 100.00% | 0.31% |
| HV ENERGY SYSTEMS LTDopenregistry-gb-10754572 | Active | SMALL | ORDINARY | 1,000 | 100.00% | 96.99% | 96.99% | 2026-05-03 |
| COPPER CONSULTANCY LIMITEDopenregistry-gb-03030759 | Active | FULL | ORDINARY | 9,469 | 84.62% | 84.62% | 84.62% | 2023-03-08 |
| RSKW LTDopenregistry-gb-06548422 | Active | DORMANT | ORDINARY | 1,600 | 80.00% | 80.00% | 80.00% | 2023-03-31 |
| RSK LAND & DEVELOPMENT ENGINEERING LIMITEDopenregistry-gb-04723837 | Active | AUDIT EXEMPTION SUBSIDIARY | A ORDINARY | 66,881 | 80.04% | 75.00% | 75.00% | 2024-06-06 |
| ADVANTAGE RSK LIMITEDopenregistry-gb-13660383 | Active | SMALL | A ORDINARY | 600 | 100.00% | 60.00% | 60.00% | 2022-10-03 |
| DEANS HOLDCO LIMITED ▼openregistry-gb-SC783027 | Active | FULL | ORDINARY | 662,376 | 2.50% | 2.50% | 2.50% | 2025-09-18 |
| W.G.M (ENGINEERING)LIMITEDopenregistry-gb-SC099834 | Active | FULL | ORDINARY | 0 | 0.00% | 0.00% | | 2023-08-31 |
| RSK ORBITAL LIMITED ▼openregistry-gb-03686187 | Active | SMALL | ORDINARY | 1,075 | | | | 2023-12-22 |
| TECHNIK GROUND SOLUTIONS LIMITEDopenregistry-gb-07874856 | Active | SMALL | ORD | 765 | | | | 2021-12-09 |
| SONIC DRILLING & PILING PLANTHIRE LIMITEDopenregistry-gb-07981593 | Active | DORMANT | ORD | 765 | | | | 2022-03-08 |
| 3BM LIMITEDopenregistry-gb-08008506 | Active | SMALL | ORDINARY | 115,361 | | | | 2025-04-17 |
| PHAROS GENERATOR SERVICES LIMITEDopenregistry-gb-08334792 | Active | SMALL | ORDINARY | 100 | | | | 2024-01-05 |
| FISHTEK LIMITED ▼openregistry-gb-03749571 | Active | SMALL | ORDINARY | 100 | | | | 2023-01-10 |
| PROJECT MILNER LIMITEDopenregistry-gb-08534885 | Active | DORMANT | ORDINARY GBP1 SHARES | 100 | | | | 2023-05-17 |
| KIRTON WATER TREATMENT SERVICES LIMITEDopenregistry-gb-08612475 | Active | SMALL | ORDINARY 1P | 111 | | | | 2023-08-11 |
| C.R. CIVIL ENGINEERING LIMITED ▼openregistry-gb-03950591 | Active | FULL | ORDINARY | 5 | | | | 2024-07-01 |
| WALDRAMS LIMITEDopenregistry-gb-08809725 | Active | AUDIT EXEMPTION SUBSIDIARY | ORDINARY SHARES | 2 | | | | 2021-12-13 |
| EIB GROUP LIMITED ▼openregistry-gb-11267170 | Active | SMALL | D ORDINARY | 2 | | | | 2022-06-01 |
| E ORDINARY | 2 | | |
| F ORDINARY | 2 | | |
| A ORDINARY | 2 | | |
| B ORDINARY | 2 | | |
| C ORDINARY | 2 | | |
| PEGASYS LIMITEDopenregistry-gb-10333897 | Active | SMALL | ORDINARY | 100 | | | | 2025-08-21 |
| CRCE PLANT LIMITEDopenregistry-gb-10408804 | Active | SMALL | ORDINARY | 1 | | | | 2024-10-23 |
| HAWKINS ELECTRICAL HOLDINGS LIMITEDopenregistry-gb-10697268 | Active | FULL | ORDINARY | 100,000 | | | | 2024-02-19 |
| FR CONSULTANTS LIMITEDopenregistry-gb-11354060 | Active | FULL | ORDINARY | 200 | | | | 2023-03-20 |
| RICHARD IRVIN FM LIMITEDopenregistry-gb-11454668 | Active | FULL | A ORDINARY | 80,000 | | | | 2023-07-11 |
| B ORDINARY | 12,000 | | |
| BROWN & MAY MARINE LIMITEDopenregistry-gb-01788594 | Active | AUDIT EXEMPTION SUBSIDIARY | ORDINARY | 4 | | | | 2023-11-24 |
| TBF SCAFFOLDING LTDopenregistry-gb-01841098 | Active | AUDIT EXEMPTION SUBSIDIARY | ORDINARY | 200 | | | | 2024-04-02 |
| UP AND UNDER LIMITEDopenregistry-gb-02434409 | Active | SMALL | ORDINARY | 50,100 | | | | 2024-05-30 |
| BMG RESEARCH LTDopenregistry-gb-02841970 | Active | FULL | ORDINARY SHARES | 216,756 | | | | 2025-09-25 |
| ECONOMIC RESEARCH SERVICES LIMITEDopenregistry-gb-02937576 | Active | SMALL | ORDINARY | 3 | | | | 2023-06-05 |
| NON ENTRY SYSTEMS LIMITEDopenregistry-gb-03052061 | Active | AUDIT EXEMPTION SUBSIDIARY | ORDINARY | 95 | | | | 2022-05-03 |
| ENVIRESEARCH TECHNOLOGIES LIMITEDopenregistry-gb-11541342 | Active | SMALL | ORDINARY | 100 | | | | 2021-08-31 |
| MWH UK ACQUISITIONS LIMITEDopenregistry-gb-11652932 | Active | AUDIT EXEMPTION SUBSIDIARY | ORDINARY | 20 | | | | 2021-11-01 |
| IAN FARMER ASSOCIATES (1998) LIMITEDopenregistry-gb-03661447 | Active | AUDIT EXEMPTION SUBSIDIARY | ORDINARY | 20,004 | | | | 2024-11-06 |
| SINGLETON CLAMP & PARTNERS LIMITEDopenregistry-gb-03728935 | Active | SMALL | ORDINARY | 200 | | | | 2024-03-28 |
| SUSTAINABLE AQUAFARMS LIMITEDopenregistry-gb-11791094 | Active | AUDIT EXEMPTION SUBSIDIARY | ORDINARY | 298,981 | | | | 2025-02-18 |
| STEPHENSON HALLIDAY LIMITEDopenregistry-gb-04179680 | Active | SMALL | A ORDINARY GBP1 SHARES | 55 | | | | 2022-02-01 |
| B ORDINARY GBP1 SHARES | 17 | | |
| E ORDINARY GBP1 SHARES | 7 | | |
| F ORDINARY GBP1 SHARES | 7 | | |
| G ORDINARY GBP1 SHARES | 7 | | |
| H ORDINARY GBP1 SHARES | 7 | | |
| CEETECH LIMITEDopenregistry-gb-04242024 | Active | FULL | ORDINARY | 27,059 | | | | 2022-06-27 |
| ENVIRESEARCH LIMITEDopenregistry-gb-04292592 | Active | SMALL | ORDINARY | 100 | | | | 2021-04-05 |
| WE ARE BRANDNEW LTDopenregistry-gb-14247042 | Active - Proposal to Strike off | AUDIT EXEMPTION SUBSIDIARY | ORDINARY | 0 | | | | 2025-09-19 |
| RSK COUNTRYSIDE MANAGEMENT LIMITEDopenregistry-gb-04515676 | Active | SMALL | ORDINARY | 100 | | | | 2022-08-22 |
| LARSEN WATER MANAGEMENT LTDopenregistry-gb-NI024918 | Active | SMALL | ORDINARY | 29 | | | | 2024-01-10 |
| TBF TRAFFIC LTDopenregistry-gb-04689212 | Active | SMALL | ORDINARY | 100 | | | | 2024-03-21 |
| HOMER BURGESS LIMITEDopenregistry-gb-SC055598 | Active | SMALL | ORDINARY | 101,767 | | | | 2024-01-26 |
| PHAROS FIELD ENGINEERING SERVICES LIMITEDopenregistry-gb-04869285 | Active | SMALL | ORDINARY | 100 | | | | 2024-09-04 |
| PROEON SYSTEMS LIMITEDopenregistry-gb-05112628 | Active | SMALL | ORDINARY | 100 | | | | 2024-04-29 |
| STREETWISE UK MANAGEMENT LIMITEDopenregistry-gb-05129606 | Active | SMALL | ORDINARY | 100 | | | | 2022-05-17 |
| TRAVIS BAKER LIMITEDopenregistry-gb-05703678 | Active | SMALL | ORDINARY | 2 | | | | 2024-02-22 |
| R.J.T. EXCAVATIONS LIMITEDopenregistry-gb-SC118090 | Active | FULL | ORDINARY | 0 | | | | 2025-12-11 |
| SOUTHERN ECOLOGICAL SOLUTIONS LIMITED ▼openregistry-gb-06192687 | Active | FULL | A ORDINARY | 10,000 | | | | 2023-03-30 |
| RSK RENEWABLES LIMITEDopenregistry-gb-SC328796 | Active | FULL | ORDINARY | 0 | | | | 2023-07-12 |
| WINDTECHS LTDopenregistry-gb-06369650 | Active | SMALL | ORDINARY | 100 | | | | 2025-10-22 |
| PA GROUP (UK) LIMITEDopenregistry-gb-06257126 | Active | SMALL | ORDINARY | 1 | | | | 2021-05-21 |
| WATERTRAIN LIMITEDopenregistry-gb-06401993 | Active | SMALL | ORDINARY | 203 | | | | 2024-03-26 |
| HEADLAND ARCHAEOLOGY (UK) LIMITEDopenregistry-gb-SC342945 | Active | FULL | ORDINARY | 0 | | | | 2024-06-13 |
| SPENCER QUANTUM LIMITED ▼openregistry-gb-02928764 | Active | FULL | ORDINARY | 500 | | | | 2024-05-31 |
| HOLLYWOOD CIVIL ENGINEERING LIMITEDopenregistry-gb-06726914 | Active | SMALL | ORDINARY | 100 | | | | 2024-10-30 |
| TREEFELLERS LIMITEDopenregistry-gb-06727099 | Active | SMALL | ORDINARY | 100 | | | | 2023-05-10 |
| CENTARA LTDopenregistry-gb-07015837 | Active | SMALL | ORDINARY | 100 | | | | 2024-09-23 |
| THE WOODHOUSE PARTNERSHIP LIMITED ▼openregistry-gb-02935938 | Active | SMALL | ORDINARY | 2,000 | | | | 2023-07-24 |
| ENVIROFLOW MANAGEMENT LIMITEDopenregistry-gb-07227667 | Active | SMALL | ORDINARY | 1,000 | | | | 2022-04-07 |