| Frankham Consultancy Group | Sidcup, Kent, Bexley | 15 | 14 |
| Pennington Choices | Warrington, Norcott Brook, Cheshire | 10 | 18 |
| Ridge & Partners | Oxfordshire, Woodstock, Theale | 9 | 38 |
| Ove Arup & Partners | London | 5 | 72 |
| Harmony Fire | Yeovil, Somerset, Childthorne Domer | 8 | 10 |
| Martin Arnold | London | 7 | 4 |
| Keegans | London | 7 | 2 |
| HSL Compliance | Herefordshire, Ross on Wye, Ross in Wye | 5 | 18 |
| 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 |
| Pier Contractors | Hertfordshire, St Albans, Herts | 5 | 5 |
| Frank Rogers Building Contractor | Liverpool, Merseyside | 8 | 6 |
| Airey Miller | Sevenoaks | 7 | 13 |
| Neo Property Solutions | Leeds, West Yorkshire | 7 | 10 |
| Ventro | Plymouth, Devon | 7 | 5 |
| Global Hse Solutions | Nottingham, Nottinghamshire | 7 | 7 |
| Tetra TECH | Leeds | 7 | 7 |
| CLC Contractors | Southampton, Hampshire | 5 | 32 |
| Openview Security Solutions | Romford | 5 | 33 |
| Environtec | Chelmsford | 5 | 20 |
| Tersus Consultancy | London, Wednesbury | 5 | 19 |
| Ductclean | Welwyn Garden City, London | 5 | 14 |
| Eft Systems | Southport, Merseyside | 5 | 9 |
| Socotec | Burton upon Trent | 5 | 7 |
| Environmental Essentials | Staffs, Staffordshire | 5 | 5 |
| Addison Green | Hull, Market Weighton | 5 | 6 |
| Recom Solutions | Wigan, Salford | 5 | 5 |
| Tetra Consulting | London | 5 | 5 |
| Breyer Group | Essex, Romford | 4 | 19 |
| 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 |
| Reactive Integrated Services | Staffordshire, Burton on Trent | 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 |
| Edp Health Safety & Environment Consultants | Cheshire, Helsby | 4 | 4 |
| Enviraz Scotland | Lanarkshire, Glasgow | 4 | 4 |
| Event Fire Solutions | Oxfordshire, Banbury | 4 | 4 |
| Fire Clear | Cambridgeshire, Huntingdon | 4 | 4 |
| G&L Consultancy | Somerset, Wellington | 4 | 4 |
| Greenfield Removals | Cheshire, Hyde | 4 | 4 |
| Hughes & Associates Property Services | Norfolk, Norwich | 4 | 4 |
| K & T Heating Services | Essex, Basildon | 4 | 4 |
| London Bridge Associates | Buckinghamshire, Gerrards Cross | 4 | 4 |
| Momentum 4 | Stirlingshire, Falkirk | 4 | 4 |
| Reddish Vale Insulations | Lancashire, Oldham | 4 | 4 |
| See Rail | Essex, Ilford | 4 | 4 |
| Sureserve Fire & Electrical | Essex, Basildon | 4 | 4 |
| Total Fire Group | Lancashire, Milnrow | 4 | 4 |
| Trail Services | Kent, Northfleet | 4 | 4 |
| TS&B Contractors | Kent, Maidstone | 4 | 4 |
| TWC Services | Buckinghamshire, Buckingham | 4 | 4 |
| Water Hygiene Centre | Oxfordshire, Hook Norton | 4 | 4 |
| Waterman Infrastructure & Environment | Birmingham | 3 | 16 |
| Land Use Consultants | London | 3 | 14 |
| Robinson Low Francis | Hertfordshire, Stevenage | 3 | 14 |
| Faithorn Farrell Timms | Kent, Orpington | 3 | 18 |
| John Rowan & Partners | London | 3 | 7 |
| David Miles & Partners | Essex, Romford | 3 | 5 |
| Ecd Architects | London | 3 | 3 |
| Ellis Moore Consulting Engineers | London | 3 | 3 |
| Frankham Projects | Kent, Sidcup | 3 | 3 |
| MLCS3 | Manchester | 3 | 3 |
| Oander | Horley | 3 | 3 |
| Quantem Consulting | London | 3 | 3 |
| Synergy Construction & Property Consultants | London | 3 | 3 |
| Hydrock Consultants | Bristol | 2 | 11 |