| VINCI Construction | Watford, Rainham, Hertfordshire | 28 | 23 |
| Morgan Sindall Construction & Infrastructure | London | 5 | 11 |
| Mulalley | Woodford Green, Essex, Redbridge | 4 | 13 |
| Mclaren Construction | London, Brentwood Esses, Brentwood | 4 | 3 |
| Durkan | Borehamwood, Herfordshire, Hertfordshire | 4 | 4 |
| Kier Construction | Sandy, Manchester | 5 | 16 |
| Interserve Construction | Birmingham, Interserve Construction Limited | 4 | 14 |
| Willmott Dixon Construction | Letchworth Garden City, Hertfordshire | 4 | 16 |
| Engie Regeneration | Waltham Abbey, Hatfield, Hertfordshire | 3 | 40 |
| Amber Construction Services | Barking, Essex | 3 | 6 |
| Diamond Build | London | 3 | 5 |
| Ad Construction Group | Sidcup, Kent | 3 | 3 |
| Galliford Try Construction | Guilford, Middlesex, Uxbridge | 3 | 3 |
| Novus Property Solutions | Stoke on Trent, Staffordshire | 3 | 32 |
| Kier Services | Manchester, Bedfordshire | 3 | 12 |
| M&J Group Construction & Roofing | Bedford | 3 | 3 |
| Sir Robert Mcalpine | Dacorum, Hemel Hempstead | 3 | 3 |
| Bell Decorating Group | Airdrie, Lanarkshire | 2 | 33 |
| Esh Construction | County Durham, Durham | 2 | 34 |
| Norse Commercial Services | Norwich | 2 | 24 |
| Seddon Construction | Bolton | 2 | 20 |
| Wates Construction | Leatherhead, Surrey | 2 | 24 |
| J Tomlinson | Birmingham, Nottingham | 2 | 16 |
| Lift & Engineering Services | West Midlands | 2 | 15 |
| Compass Contract Services | West Midlands, Rubery | 2 | 12 |
| Dodd Group Midlands | Telford | 2 | 11 |
| OCS Group | Crawley | 2 | 11 |
| Wates Property Services | Leatherhead, Surrey | 2 | 11 |
| ISS Mediclean | Weybridge | 2 | 7 |
| Hill Partnerships | Essex, Waltham Abbey | 2 | 6 |
| Richard Irvin FM | London | 2 | 6 |
| Mclaughlin Harvey | Antrim, County Antrim | 2 | 5 |
| RG Carter Cambridge | Norfolk, Norwich | 2 | 13 |
| Cenergist | Tyne and Wear, Washington | 2 | 7 |
| Amey Community | London | 2 | 4 |
| Ashe Construction | Hitchin, Herts | 2 | 4 |
| Speller Metcalfe Malvern | Malvern | 2 | 4 |
| Rydon Construction | Forest Row, East Sussex | 2 | 4 |
| GF Tomlinson Building | Little Eaton, Little Eaton Derby | 2 | 3 |
| Higgins Construction | Essex, Loughton | 2 | 3 |
| Robertson Facilities Management | Elgin | 2 | 3 |
| Vertas Group | Ipswich | 2 | 3 |
| Ark Build | Loughton, Essex | 2 | 2 |
| Cosmur Construction London | Lkondon, London | 2 | 2 |
| Hebs Group | Liverpool | 2 | 2 |
| Ser Contractor | London | 2 | 2 |
| Abm Facility Services | London | 2 | 2 |
| Bennett Construction | London | 2 | 2 |
| BJF Connections | Maidstone | 2 | 2 |
| Conamar Building Services | Herts, Stevenage | 2 | 2 |
| Derwent FM | Derby | 2 | 2 |
| Engie Supply Holding | Newcastle upon Tyne | 2 | 2 |
| Kind Diamond Build Consortium | Middlesex, London | 2 | 2 |
| Logan Construction SE | London, Eltham | 2 | 2 |
| Mears Facilities Management | Brockworth | 2 | 2 |
| MPD FM | Dagenham | 2 | 2 |
| Sol Services | Bletchley, Milton Keynes | 2 | 2 |
| TB Contractors | Bletchley, St Albans | 2 | 2 |
| Trios Facilities Management | Weybridge | 2 | 2 |
| Openview Security Solutions | Romford | 2 | 33 |
| Aym Services | Uxbridge | 2 | 6 |
| Contract Services South Wales | Port Talbot | 2 | 2 |
| Henstaff Construction | Swansea | 2 | 2 |
| Mace | London | 1 | 26 |
| John Graham Construction | Hillsborough | 1 | 21 |
| Breyer Group | Romford | 1 | 19 |
| Gelder | Lincoln | 1 | 20 |
| Bam Construction | Hempstead | 1 | 16 |
| Axis Europe | London | 1 | 27 |
| Lanes Group | Leeds | 1 | 10 |
| F Parkinson | Blackpool | 1 | 9 |
| Bowmer Kirkland | Derbyshire | 1 | 9 |
| Galliford Try Building | Middlesex | 1 | 7 |
| Robertson Construction Group | Stirlingshire | 1 | 11 |
| Bouygues | London | 1 | 9 |
| Thomas Sinden | Romford | 1 | 8 |
| FM Conway | Sevenoaks | 1 | 9 |
| Morris & Spottiswood | Glasgow | 1 | 7 |
| Ad Construction Group Architectural Decorators | Sidcup | 1 | 7 |
| Farrans Construction | Dunmurry | 1 | 7 |
| Conlon Construction | Preston | 1 | 5 |
| Bam Nuttall | London | 1 | 5 |
| Neilcott Construction | Orpington | 1 | 5 |
| Caddick Construction | West Yorkshire | 1 | 5 |
| Carmelcrest | Bishops Stortford | 1 | 5 |
| Eric Wright Construction | Preston | 1 | 4 |
| Morgan Sindall | London | 1 | 4 |
| Balfour Beatty | Holytown | 1 | 5 |
| Marlborough Highways | Chelmsford | 1 | 4 |
| SSG Support Services Group | Romford | 1 | 4 |
| Skanska Construction | Hertfordshire | 1 | 3 |
| Stepnell | Warwickshire | 1 | 3 |
| Speller Metcalfe | Worcestershire | 1 | 3 |
| Wilmott Dixon Construction | Letchworth Garden City | 1 | 4 |
| Stack London | London | 1 | 4 |
| Quinn London | London | 1 | 3 |
| Kier Construction London | Loughton | 1 | 4 |
| Barnes Construction | Ipswich | 1 | 3 |
| Bugler Developments | Rickmansworth | 1 | 3 |
| Coulson | Cambridge | 1 | 3 |