| Mace | London, City of London, Manchester | 41 | 26 |
| Mace Cost Consultancy | London | 4 | 4 |
| Mace Group | City of London, London | 2 | 2 |
| Mace & Menter | Bristol | 2 | 2 |
| Mace Macro | London | 3 | 3 |
| Mace Consult | Birmingham | 1 | 1 |
| Mace Interiors Group | Moorgate | 1 | 1 |
| Mace Restricted Access | Moorgate | 1 | 1 |
| Mace TT with Mace | Leeds | 1 | 1 |
| Mace TT with Turner Townsend Project Management | London | 1 | 1 |
| AECOM | London, St Albans, Cardiff | 11 | 137 |
| Mott Macdonald | Croydon, Cardiff, Altincham | 6 | 60 |
| Atkins | Epsom, Cardiff, Epspm | 7 | 128 |
| WSP | London | 7 | 132 |
| Jacobs | Cardiff, London, Berkshire | 5 | 62 |
| PRP Architects | Surry, Surrey, Thames Ditton | 5 | 4 |
| Gleeds Cost Management | London | 6 | 5 |
| Ove Arup & Partners | London, Cardiff | 5 | 72 |
| Sweco | Leeds, London | 5 | 5 |
| Rund Partnership | London, Hampshire, Chandlers Ford | 5 | 5 |
| Arcadis | London, Lomdon, Manchester | 4 | 79 |
| Rider Levett Bucknall | Birmingham | 4 | 21 |
| Stantec | Bristol, Frederick, High Wycombe | 4 | 15 |
| Turner & Townsend Project Management | Leeds, London | 4 | 13 |
| Hawkins Brown Design | London | 3 | 7 |
| Perfect Circle | Leicester | 7 | 23 |
| H& J Martin | Belfast | 6 | 3 |
| Calfordseaden | London | 5 | 20 |
| Avison Young | Birmingham | 5 | 12 |
| Silver DCC | London | 5 | 3 |
| Ramboll | London | 4 | 20 |
| Faithful Gould | Epsom | 3 | 44 |
| Arcadis Consulting | Cardiff, London | 3 | 23 |
| TSG Building Services | Hertfordshire, Potters Bar | 3 | 16 |
| Dodd Group Midlands | Shropshire, Telford | 3 | 11 |
| BDP | Bristol, Manchester | 3 | 13 |
| Capita Property & Infrastructure | Cardiff, London | 3 | 21 |
| Wates Property Services | Surrey, Leatherhead | 3 | 11 |
| Ybc Cleaning Services | Hampshire, Aldershot | 3 | 6 |
| Ahr Architects | Manchester, London | 3 | 5 |
| Irwin M&E | County Armagh, Craigavon | 3 | 7 |
| Just Ask Estate Services | Surrey, West Byfleet | 3 | 3 |
| Atlas Facilities Management | Middlesex, Hanworth | 3 | 3 |
| BJF Connections | Kent, Maidstone | 3 | 3 |
| Emcor Group | Surrey, Surbiton | 3 | 3 |
| Facilicom Cleaning Services | Kent, Sidcup | 3 | 3 |
| Graffins Services | Middlesex, Richmond upon Thames | 3 | 3 |
| Hunters Partners | London | 3 | 3 |
| Intelligent Workplace Solutions | Berkshire, Reading | 3 | 3 |
| MPD FM | Essex, Dagenham | 3 | 3 |
| NG Bailey Facilities Services | West Yorkshire, Ilkley | 3 | 3 |
| Oracle Security Services | Essex, Ilford | 3 | 3 |
| Pendergate | Hertfordshire, Hatfield | 3 | 3 |
| Q3 Services Group | Surrey, Godalming | 3 | 3 |
| See Rail | Essex, Ilford | 3 | 3 |
| Trios Facilities Management | Surrey, Weybridge | 3 | 3 |
| Ridge & Partners | Woodstock, Manchester | 2 | 38 |
| Turner & Townsend | West Yorkshire, Manchester | 2 | 39 |
| Systra | London, Manchester | 2 | 13 |
| Elementa Consulting | Epsom, Surrey | 2 | 4 |
| Nationwide Data Collection | Warwick, Ossett | 2 | 4 |
| Cosmur Construction London | Lkondon, London | 2 | 2 |
| Scott Brownrigg | London | 2 | 2 |
| Sol Services | Bletchley, Milton Keynes | 2 | 2 |
| TB Contractors | Bletchley, St Albans | 2 | 2 |
| Biffa Waste Services | High Wycombe | 3 | 36 |
| Norse Commercial Services | Norwich | 3 | 24 |
| Cbre Managed Services | London | 3 | 21 |
| Veolia ES | London | 3 | 18 |
| Kingdom Services Group | Newton le Willows | 3 | 15 |
| Baily Garner | London | 3 | 10 |
| Compass Contract Services | Birmingham | 3 | 12 |
| Bellrock Property & Facilities Management | Leicester | 3 | 8 |
| John Rowan & Partners | London | 3 | 7 |
| Richard Irvin FM | London | 3 | 6 |
| Citrus Electrical | Prescot | 3 | 11 |
| Bam FM | Glasgow | 3 | 6 |
| Tenon FM | Uxbridge | 3 | 4 |
| Fes FM | Stirling | 3 | 5 |
| Crystal Facilities Management | London | 3 | 3 |
| Apleona HSG | London | 3 | 3 |
| Amulet Churchill Security Solutions | Harpenden | 3 | 3 |
| First Response Group | Leeds | 3 | 3 |
| Bouygues E&S Solutions | London | 3 | 2 |
| MITIE Waste & Environmental Services | London | 3 | 2 |
| Avrenim Facilities Management | Liverpool | 3 | 3 |
| Azt Trading | Shrewsbury | 3 | 3 |
| City Security Services | London | 3 | 3 |
| Eric Wright FM | Preston | 3 | 3 |
| Fortis HMS | Manchester | 3 | 3 |
| Freidman FM | Fleet | 3 | 3 |
| Galliford Try Facilities Management | Uxbridge | 3 | 3 |
| Gaskells North West | Liverpool | 3 | 3 |
| Guarding Professionals | Enfield | 3 | 3 |
| Kimpton | Wirral | 3 | 3 |
| Madlins | Woking | 3 | 3 |
| Mario Group Facility Management | Glasgow | 3 | 3 |
| Munnelly Support Services | Harrow | 3 | 3 |
| Octavian Facilities Management | Nottingham | 3 | 3 |
| Oculus Security Solutions | Merseyside | 3 | 3 |