| CLC Contractors | Southampton, Hampshire, Camberley | 40 | 32 |
| Westmade | Netherhampton, Salisbury, Wiltshire | 13 | 5 |
| Bell Decorating Group | Airdrie, North Lanarkshire, Lanarkshire | 15 | 33 |
| Spetisbury Construction | Dorset, Wimborne, Christchurch | 11 | 11 |
| Corrigenda | Fareham, Hampshire, East Fareham | 8 | 12 |
| Ian Williams | Bristol, Gloucestershire, South Gloucestershire | 10 | 19 |
| Openview Security Solutions | Romford, Essex | 8 | 33 |
| DR Jones Yeovil | Yeovil, Yeovill, Somerset | 8 | 9 |
| Randell & Co Builders | Christchurch, Bournemouth, Christchurch and Poole, Christchurh | 5 | 5 |
| Harmony Fire | Yeovil, Somerset, Childthorne Domer | 9 | 10 |
| Ventro | Plymouth, Devon | 9 | 5 |
| Novus Property Solutions | Stoke on Trent, Stoke-on-Trent, Staffordshire | 7 | 32 |
| Reactive Integrated Services | Staffordshire, Burton on Trent, East Staffordshire | 7 | 2 |
| Lindum Group | Lincoln, Lincolnshire, North Kesteven | 6 | 25 |
| G&L Consultancy | Somerset, Wellington | 6 | 6 |
| TSG Building Services | Hertfordshire, Hertsmere, Potters Bar | 5 | 16 |
| Metro Rod | Cheshire, Kidderminster, Worcestershire | 5 | 8 |
| Norse Commercial Services | Norwich | 7 | 24 |
| Environtec | Chelmsford | 7 | 20 |
| Arc Group London | London, Greater London, Enfield | 7 | 12 |
| Purdy Contracts | London, Greater London, Epping Forest | 7 | 9 |
| Eft Systems | Southport, Merseyside | 6 | 9 |
| Breyer Group | Essex, Romford | 5 | 19 |
| HSL Compliance | Herefordshire, Ross on Wye, Ross in Wye | 5 | 18 |
| Frankham Consultancy Group | Kent, Sidcup | 5 | 14 |
| Aspect Contracts | Essex, Basildon | 5 | 10 |
| Life Environmental Services | Hertfordshire, Bishops Stortford, Stockport | 5 | 7 |
| Erith Contractors | Kent, Erith, London | 5 | 5 |
| Norwood Electrical | Derbyshire, North West Leicestershire, Lockington | 5 | 2 |
| Trac Associates | Lancashire, Bury, Prestwich | 5 | 2 |
| GBJ Environmental Systems | Warrington, Cheshire | 5 | 2 |
| Cantillon Group | Wiltshire, Swindon | 5 | 5 |
| Hampshire Partitioning Contracts | Chandlers Ford, Eastleigh, Hampshire | 5 | 5 |
| Pier Contractors | Hertfordshire, St Albans, Herts | 5 | 5 |
| BSG Property Services | Bedfordshire, Central Bedfordshire, Sandy | 4 | 5 |
| Stepnell | Rugby, Warkwickshire, Warwickshire | 4 | 3 |
| Construction Specialties | Wimborne, Dorset, Wimbirne | 4 | 4 |
| Fixatex | Hertford, East Hertfordshire | 4 | 4 |
| Quality Eradication Services Today | Bradford, West Yorkshire | 4 | 4 |
| SSE Enterprise Contracting | Reading, Berkshire | 3 | 7 |
| RM Smith Fencing | Hampshire, Ringqood, Ringwood | 3 | 3 |
| Frank Rogers Building Contractor | Liverpool, Merseyside | 8 | 6 |
| Neo Property Solutions | Leeds, West Yorkshire | 7 | 10 |
| Global Hse Solutions | Nottingham, Nottinghamshire | 7 | 7 |
| European Asbestos Services | London | 6 | 3 |
| Casa Environmental Services | Bristol | 6 | 6 |
| Pennington Choices | Warrington, Cheshire | 5 | 18 |
| Tersus Consultancy | London, Wednesbury | 5 | 19 |
| Ductclean | Welwyn Garden City, London | 5 | 14 |
| Abca Systems | Killingworth, Newcastle | 5 | 9 |
| Socotec | Burton upon Trent | 5 | 7 |
| Fieldway Supplies | Liverpool | 5 | 6 |
| Environmental Essentials | Staffs, Staffordshire | 5 | 5 |
| Addison Green | Hull, Market Weighton | 5 | 6 |
| Lawtech Group | Rochester, Rockester | 5 | 4 |
| Jackson Jackson | Rochdale | 5 | 7 |
| Diamond Build | London | 5 | 5 |
| Baydale Control Systems | Darlington | 5 | 4 |
| Chase Building & Electrical | Havant, Hampshire | 5 | 5 |
| Chigwell London | Redbridge, Essex | 5 | 5 |
| Clameg Design & Build | Portsmouth | 5 | 5 |
| P Casey | Rochdale | 5 | 5 |
| Recom Solutions | Wigan, Salford | 5 | 5 |
| Tetra Consulting | London | 5 | 5 |
| Ridge & Partners | Oxfordshire, Woodstock | 4 | 38 |
| Tunstall Healthcare | Yorkshire, Whitley Bridge | 4 | 35 |
| Aaron Services | Essex, Basildon | 4 | 17 |
| Dodd Group Midlands | Shropshire, Telford | 4 | 11 |
| DFP Services | Durham, County Durham | 4 | 12 |
| Woods Building Services | Essex, Harlow | 4 | 9 |
| Testing Lab | South Yorkshire, Doncaster | 4 | 9 |
| Mchale Contracts & Plant Environmental | West Yorkshire, Bradford | 4 | 10 |
| Em1 | North Yorkshire, Northallerton | 4 | 8 |
| Urban Environments | Kent, Sevenoaks | 4 | 7 |
| Crystal Electronics | Northants, Wellingborough | 4 | 7 |
| H2O Nationwide | Essex, Basildon | 4 | 6 |
| Midland Fire Security Services | Staffordshire, East Staffordshire | 4 | 5 |
| Appello Smart Living Solutions | Hampshire, Queensway | 4 | 4 |
| Bailey Partnership Consultants | Devon, Plymouth | 4 | 4 |
| PRP Architects | Surrey, Thames Ditton | 4 | 4 |
| Total Environmental Compliance | Northamptonshire, Corby | 4 | 4 |
| Irwin M&E | County Armagh, Craigavon | 4 | 7 |
| Gully Howard Technical | Hampshire, Portsmouth | 4 | 5 |
| Rge Services | Essex, Chigwell | 4 | 5 |
| SMS Environmental | Oxfordshire, Didcot | 4 | 3 |
| WG Wigginton | Middlesex, Greenford | 4 | 4 |
| Countrywide Environmental Services | Staffordshire, Rugeley | 4 | 3 |
| NRT Building Services Group | Surrey, Reigate and Banstead | 4 | 3 |
| Asbestos Consultants Europe | Essex, Grays | 4 | 2 |
| Cablesheer Asbestos | Kent, Orpington | 4 | 2 |
| Electrical Compliance & Safety | Northamptonshire, Earlstrees Industrial Estate | 4 | 2 |
| Farrendale | Nottinghamshire, Sherwood Energy Village | 4 | 2 |
| PA Group | Cheshire, Helsby | 4 | 2 |
| Architectural Decorators | Kent, Sidcup | 4 | 4 |
| Arg Europe | Hertfordshire, Waltham Cross | 4 | 4 |
| Arvag | Kent, Swanley Village | 4 | 4 |
| BB7 Group | Kent, Rochester | 4 | 4 |
| Clarkes Environmental | North Yorkshire, Northallerton | 4 | 4 |
| Delco Safety | Surrey, Cheam | 4 | 4 |
| Devine Energy | Mid Lothian, Mid | 4 | 4 |