| ABCA Systems Limited shared | · | · | active |
| A. Connolly Limited shared | · | · | active |
| Adaston Limited shared | · | · | active |
| Addison Green Limited shared | · | · | active |
| AHR Building Consultancy Limited shared | · | · | active |
| Airey Miller Surveys Limited shared | · | · | active |
| Airtech Analysis Ltd shared | · | · | active |
| AJS Ltd shared | · | · | active |
| Allium Environmental Limited shared | · | · | active |
| Alphatrack Systems Limited shared | · | · | active |
| Amianto Services Limited shared | · | · | active |
| Amstech Asbestos Removals Limited shared | · | · | active |
| Approved Fire Safety Ltd shared | · | · | active |
| Architectural Decorators Limited shared | · | · | active |
| A R G Europe Ltd shared | · | · | active |
| Ark Fire Protection Ltd shared | · | · | active |
| Asbestech Limited shared | · | · | active |
| ASEL Integrated Security Solutions Ltd shared | · | · | active |
| Aspect Contracts Limited shared | · | · | active |
| Axiom Building Solutions Limited shared | · | · | active |
| Ayerst Environmental Limited shared | · | · | active |
| Bailey Partnership (Group) Ltd shared | · | · | active |
| Baydale Control Systems Limited shared | · | · | active |
| BB7 Fire Limited shared | · | · | active |
| Bell Group Ltd shared | · | · | active |
| Bradley Environmental Consultants Limited shared | · | · | active |
| Calfordseaden LLP shared | · | · | active |
| Capital Property & Construction Consultants Ltd shared | · | · | active |
| Casa Environmental Services Ltd shared | · | · | active |
| Checkmate Fire Solutions Limited shared | · | · | active |
| Churchill Contract Services Limited shared | · | · | active |
| C.L.C. Contractors Limited shared | · | · | active |
| Clear Safety Services Ltd shared | · | · | active |
| Clearview Environmental Ltd shared | · | · | active |
| Clifford Devlin Limited shared | · | · | active |
| Countrywide Environmental Services Limited shared | · | · | active |
| Danacom Ltd shared | · | · | active |
| Delco Safety Limited shared | · | · | active |
| DFP Services Limited shared | · | · | active |
| Doors Plus Ltd shared | · | · | active |
| Ductclean (UK) Limited shared | · | · | active |
| E.C.G. Building Maintenance Ltd. shared | · | · | active |
| Ecosafe Heating Limited shared | · | · | active |
| E.D.P. Health, Safety and Environment Consultants Limited shared | · | · | active |
| EDSB Limited shared | · | · | active |
| EFT Systems Limited shared | · | · | active |
| Enviraz (Scotland) Limited shared | · | · | active |
| Environmental Management Solutions Limited shared | · | · | active |
| Environtec Limited shared | · | · | active |
| Erith Contractors Limited shared | · | · | active |
| European Asbestos Services Limited shared | · | · | active |
| Evans & Brooks Fire Limited shared | · | · | active |
| Ezra Safety Group Limited shared | · | · | active |
| Fieldway Supplies Limited shared | · | · | active |
| Firelink Protection Limited shared | · | · | active |
| Firntec Ltd shared | · | · | active |
| Frankham Consultancy Group Limited shared | · | · | active |
| Frank Rogers (Building Contractor) Limited shared | · | · | active |
| Franks Portlock Consulting Limited shared | · | · | active |
| Full Circle Compliance Ltd shared | · | · | active |
| Gemini AMPM Ltd shared | · | · | active |
| G & L Consultancy Limited shared | · | · | active |
| GMS Services Limited shared | · | · | active |
| Goom Electrical Limited shared | · | · | active |
| Greenfield Removals Limited shared | · | · | active |
| Green Shield Environmental Ltd shared | · | · | active |
| GTM Fire Protection Limited shared | · | · | active |
| Gwella Contracting Services Ltd shared | · | · | active |
| Harmony Fire Limited shared | · | · | active |
| HCS Water Treatment Ltd shared | · | · | active |
| Healthy Buildings (Ireland) Limited shared | · | · | active |
| Holistic Fire Safety Ltd shared | · | · | active |
| HSL Compliance Ltd shared | · | · | active |
| Hughes and Salvidge Limited shared | · | · | active |
| Hydraclean Limited shared | · | · | active |
| IFI Group Ltd shared | · | · | active |
| Integrated Digital CCTV Systems Limited shared | · | · | active |
| ION Facilities Management Group Ltd shared | · | · | active |
| Jackson, Jackson & Sons Limited shared | · | · | active |
| JFN Integrated Solutions Limited shared | · | · | active |
| Keegans Limited shared | · | · | active |
| Life Environmental Services Limited shared | · | · | active |
| Lightside Limited shared | · | · | active |
| Mango-5 Maintenance Limited shared | · | · | active |
| Martin Arnold Limited shared | · | · | active |
| McIntyre Compliance Services Limited shared | · | · | active |
| Mears Limited shared | · | · | active |
| Michael Dyson Associates Limited shared | · | · | active |
| Miller Knight Resource Management Ltd shared | · | · | active |
| Mulalley & Co. Limited shared | · | · | active |
| Neo Property Solutions Limited shared | · | · | active |
| New Terra Compliance Ltd shared | · | · | active |
| Norse Commercial Services Limited shared | · | · | active |
| North Star Environmental Ltd shared | · | · | active |
| Oakray Limited shared | · | · | active |
| O.C. Consulting (UK) Limited shared | · | · | active |
| Openview Security Solutions Limited shared | · | · | active |
| Oro Security Limited shared | · | · | active |
| Orton Electrical Services Limited shared | · | · | active |
| P. Casey & Co., Limited shared | · | · | active |
| Pellings LLP shared | · | · | active |
| Pennington Choices Limited shared | · | · | active |
| Pioneer Site Services Limited shared | · | · | active |
| PRP Architecture LLP shared | · | · | active |
| RAAM Construction Limited shared | · | · | active |
| Recom Solutions Ltd shared | · | · | active |
| RE:GEN Solutions Limited shared | · | · | active |
| RGE Services Limited shared | · | · | active |
| Ridge and Partners LLP shared | · | · | active |
| Riskhub Consultancy Limited shared | · | · | active |
| Rock Compliance Limited shared | · | · | active |
| R.W. Joinery (Stockport) Limited shared | · | · | active |
| Safe Water IO Limited shared | · | · | active |
| Scope iT Ltd shared | · | · | active |
| Second Element Limited shared | · | · | active |
| Severnside Security Ltd shared | · | · | active |
| Severn Trent Services Operations UK Limited shared | · | · | active |
| SGS United Kingdom Limited shared | · | · | active |
| Shellen Security Limited shared | · | · | active |
| Shield Environmental Services Limited shared | · | · | active |
| Shield Fire and Security Limited shared | · | · | active |
| S M S Environmental Limited shared | · | · | active |
| SOCOTEC UK Limited shared | · | · | active |
| Solid State Security Limited shared | · | · | active |
| Spectra Analysis Services Limited shared | · | · | active |
| Sunfish Services Limited shared | · | · | active |
| Sureserve Compliance Water Limited shared | · | · | active |
| Tersus Consultancy Limited shared | · | · | active |
| Tetra Tech Limited shared | · | · | active |
| T F Jones Property Services Limited shared | · | · | active |
| The Hazard Management & Environmental Services Laboratories Limited shared | · | · | active |
| The Testing Lab PLC shared | · | · | active |
| Total Environmental Compliance Limited shared | · | · | active |
| TRAC Associates Limited shared | · | · | active |
| Trail Group Limited shared | · | · | active |
| Triangle Fire Systems Limited shared | · | · | active |
| Tunstall Healthcare (UK) Limited shared | · | · | active |
| Turner & Townsend Project Management Limited shared | · | · | active |
| Urban Environments Limited shared | · | · | active |
| Ventro Ltd shared | · | · | active |
| Water Hygiene Centre Limited shared | · | · | active |
| Wates Property Services Limited shared | · | · | active |
| WCS Environmental Limited shared | · | · | active |
| Woods Building Services Limited shared | · | · | active |
| Xomni Limited shared | · | · | active |