| John Graham Construction | Hillsborough, Glasgow, London | 21 | 21 |
| John Graham Construction Ltdta Graham | Hillsborough | 1 | 1 |
| Wates Construction | Leatherhead, Surrey | 6 | 24 |
| Kier Construction | Aberdeen, Sandy, Manchester | 5 | 16 |
| Mclaughlin & Harvey | Newtownabbey, Mallusk, County Antrim | 6 | 5 |
| Neilcott Construction | Kent, Orpington, London | 5 | 5 |
| Bugler Developments | Hertfordshire, Rickmansworth, Southwest Hertfordshire | 5 | 3 |
| Midgard | Borehamwood, Hertfordshire, Southern Hertfordshire | 5 | 3 |
| Glenman Corporation | London, Chiswick | 5 | 2 |
| Seddon Construction | Bolton, Altro | 3 | 20 |
| Interserve Construction | Birmingham, Interserve Construction Limited, West Midlands | 3 | 14 |
| Bam Construction | Edinburgh, Hempstead | 3 | 16 |
| Morris & Spottiswood | Glasgow, Glasgow City | 3 | 7 |
| Real Lse | Covent Garden, London | 4 | 4 |
| Thakeham Partnerships | Billingshurst, West Sussex | 4 | 4 |
| Engie Regeneration | Newcastle upon Tyne, Bellshill | 3 | 40 |
| Mulalley | Woodford Green, London | 3 | 13 |
| Midas Construction | Exeter, Bristol | 3 | 11 |
| Bouygues | London | 3 | 9 |
| Mclaren Construction | Brentwood, Brentwood Esses | 3 | 3 |
| Lowry Building Civil Engineering | Castlederg | 3 | 3 |
| J Tomlinson | Birmingham, Nottingham | 2 | 16 |
| Willmott Dixon Construction | Surrey, Hertfordshire | 2 | 16 |
| F Parkinson | Blackpool | 2 | 9 |
| RG Carter Cambridge | Norfolk, Norwich | 2 | 13 |
| Speller Metcalfe Malvern | Malvern | 2 | 4 |
| Rydon Construction | East Sussex | 2 | 4 |
| GF Tomlinson Building | Little Eaton, Little Eaton Derby | 2 | 3 |
| John Turner Construction Group | Preston | 2 | 2 |
| City Build Manchester | Preston | 2 | 2 |
| Balfour Beatty Construction | Edinburgh | 2 | 2 |
| Conamar Building Services | Herts, Stevenage | 2 | 2 |
| Feltham Construction | Newbury, Berkshire | 2 | 2 |
| Galliford Try Construction | Middlesex, Uxbridge | 2 | 2 |
| RMF | Stirling | 2 | 2 |
| Warden Construction | Preston | 2 | 2 |
| FP Mccann | Magherafelt | 3 | 3 |
| TSG Building Services | Hertfordshire | 2 | 16 |
| Lovell Partnerships | London | 2 | 12 |
| Hill Partnerships | Waltham Abbey | 2 | 6 |
| Ew Beard | Swindon | 2 | 8 |
| United Living South | Swanley | 2 | 5 |
| Buxton Building Contractors | Surrey | 2 | 7 |
| Henry Brothers | Magherafelt | 2 | 3 |
| Henry Construction Projects | Cranford | 2 | 3 |
| Vistry Partnerships | West Malling | 2 | 3 |
| Ohmg Holdings | Newry | 2 | 2 |
| Ardmore Construction | London | 2 | 2 |
| Bennett Construction | London | 2 | 2 |
| Durkan | Borehamwood | 2 | 2 |
| HG Construction | Hitchin | 2 | 2 |
| Higgins Partnership 1961 | Loughton | 2 | 2 |
| Kingsbury Construction | London | 2 | 2 |
| Northstone NI | Belfast | 2 | 2 |
| Real SW | London | 2 | 2 |
| Syntec Projects | London | 2 | 2 |
| Tracey Brothers | Enniskillen | 2 | 2 |
| Esh Construction | Durham | 1 | 34 |
| MITIE Property Services | Swindon | 1 | 23 |
| VINCI Construction | Watford | 1 | 23 |
| Gelder | Lincoln | 1 | 20 |
| Overbury | Greater London | 1 | 18 |
| Morgan Sindall Construction & Infrastructure | London | 1 | 11 |
| Bowmer Kirkland | Derbyshire | 1 | 9 |
| Conlon Construction | Preston | 1 | 5 |
| Caddick Construction | West Yorkshire | 1 | 5 |
| Carmelcrest | Bishops Stortford | 1 | 5 |
| J Greenwood Builders | Chadderton | 1 | 5 |
| Spie | London | 1 | 5 |
| Eric Wright Construction | Preston | 1 | 4 |
| Balfour Beatty | Holytown | 1 | 5 |
| Diamond Build | London | 1 | 5 |
| Ashe Construction | Herts | 1 | 4 |
| CCG Scotland | Glasgow | 1 | 3 |
| Mctaggart Construction | Dalry | 1 | 3 |
| Skanska Construction | Hertfordshire | 1 | 3 |
| Stepnell | Warwickshire | 1 | 3 |
| Fes Support Services | Stirling | 1 | 3 |
| Harry Fairclough Construction | Warrington | 1 | 3 |
| Herbert T Forrest | Bolton | 1 | 3 |
| Willmott Dixon Interiors | Greater London | 1 | 3 |
| Coulson | Cambridge | 1 | 3 |
| Higgins Construction | Essex | 1 | 3 |
| Ark Build | Essex | 1 | 2 |
| Clark Contracts | Paisley | 1 | 2 |
| H Bell Sons Rochdale | Rochdale | 1 | 2 |
| Henry Boot Construction | Sheffield | 1 | 2 |
| John Sisk | St Albans | 1 | 2 |
| Mountjoy | Portsmouth | 1 | 2 |
| MPH Construction | Flintshire | 1 | 2 |
| Sewell Construction | Hull | 1 | 2 |
| Manchester & Cheshire Construction | Salford | 1 | 10 |
| ISG Fit Out | Greater London | 1 | 2 |
| Kaberry Construction | Heywood | 1 | 2 |
| Pellikaan Construction | London | 1 | 2 |
| Resolution Interiors | Yeovil | 1 | 2 |
| Shaylor Group | West Midlands | 1 | 2 |
| Thakeham Client | West Sussex | 1 | 2 |
| Adman Civil Projects | Omagh | 1 | 1 |
| AG Wilson | Portadown | 1 | 1 |