| Caterlink | Reading, Wokingham | 3 | 14 |
| Treka Bus | Calderdale, Brighouse | 2 | 17 |
| Life Environmental Services | Municipio de Rufino, East Hertfordshire | 2 | 7 |
| Thomson Reuters | Tower Hamlets | 2 | 11 |
| Home Connections Lettings | London, Islington | 2 | 3 |
| 2CQR | Lincolnshire, Long Bennington | 2 | 2 |
| Cascade Cars | London | 103 | 126 |
| Abacus Mobility | Croydon | 88 | 158 |
| Aj Mobility & Training Services | London | 26 | 45 |
| Premier Minicab Services | Surbiton | 25 | 47 |
| Brunswick Cars | Sutton | 22 | 60 |
| Sna Transport | London | 18 | 26 |
| Tracks Cars | Mitcham | 15 | 10 |
| Apps Cars | Sutton | 6 | 18 |
| Merton Community Transport | London | 6 | 9 |
| Portmaster | Croydon | 5 | 7 |
| Capitol Engineering Services | Kingston upon Thames | 5 | 5 |
| Airport Transfer Cars | Enfield | 4 | 158 |
| Oakmarket Group | New Malden | 4 | 4 |
| KB Radio Cars | New Malden | 3 | 5 |
| SCG Commercial | Mid Sussex | 3 | 5 |
| PG Marshall | Merton | 3 | 2 |
| Moy Construction | Merton | 3 | 3 |
| South Thames College | London | 3 | 3 |
| LA Belle Roofing | Tandridge | 2 | 3 |
| Mckeown Fencing | Sutton | 2 | 2 |
| Cognus | Surrey | 2 | 2 |
| GDPR in School | Greater London | 2 | 2 |
| London Childrens Practice 2009 | London | 2 | 2 |
| Ot Practice | Hampshire | 2 | 2 |
| Woodland Commercial | Spelthorne | 2 | 2 |
| XMA | Rushcliffe | 1 | 93 |
| WSP | City of London | 1 | 132 |
| Stone Computers | South Staffordshire | 1 | 24 |
| Sodexo | Camden | 1 | 21 |
| Canon | Hillingdon | 1 | 9 |
| Open University | Milton Keynes | 1 | 10 |
| Agilisys | Hammersmith and Fulham | 1 | 7 |
| Skills Training | Harrow | 1 | 6 |
| Inspired Energy | Lancashire | 1 | 6 |
| Jade Security Services | Wokingham | 1 | 6 |
| Office for Public Management | London | 1 | 5 |
| Hymans Robertson | Glasgow City | 1 | 5 |
| Servelec Social Care | Sheffield | 1 | 8 |
| Kat Transport | Croydon | 1 | 10 |
| Comensura | Luton | 1 | 5 |
| Damar | Stockport | 1 | 4 |
| Accurate Roofing | Gravesend | 1 | 3 |
| Estio Training | Manchester | 1 | 3 |
| Joju Solar | London | 1 | 3 |
| United Response | | 1 | 3 |
| Hawk Management | Richmond upon Thames | 1 | 6 |
| TRN Train | Gateshead | 1 | 3 |
| Tyco Fire & Integrated Solutions | South Cambridgeshire | 1 | 3 |
| Edes | Merton | 1 | 2 |
| Inform Cpi | City of London | 1 | 2 |
| Jga | Hillingdon | 1 | 2 |
| KC Services Group | Merton | 1 | 2 |
| Zylpha | Winchester | 1 | 2 |
| Age UK Merton | Merton | 1 | 1 |
| Ashley Group | Sutton | 1 | 1 |
| B Cam | Cornwall | 1 | 1 |
| Barkland Tree Specialists | Spelthorne | 1 | 1 |
| BSF Consumables | Sutton | 1 | 1 |
| Central London Community Healthcare NHS Trust | London | 1 | 1 |
| Central Training Group | Tower Hamlets | 1 | 1 |
| Chargy | Tower Hamlets | 1 | 1 |
| Cips | East Northamptonshire | 1 | 1 |
| City Literary Institute | London | 1 | 1 |
| Collaborate I CIC | Birmingham | 1 | 1 |
| Community Catalysts CIC | Harrogate | 1 | 1 |
| Construction & Shopfitting | Three Rivers | 1 | 1 |
| Credit Services Association | Newcastle upon Tyne | 1 | 1 |
| Festive Lighting | Taunton | 1 | 1 |
| FHP Engineering Services Solutions | Camden | 1 | 1 |
| Global Solution Services | Croydon | 1 | 1 |
| Hounslow & Richmond Community Healthcare NHS Trust | Richmond upon Thames | 1 | 1 |
| HW Components | Barnsley | 1 | 1 |
| Kingfisher Joinery | Camden | 1 | 1 |
| Land & Water Services | Guildford | 1 | 1 |
| Lifetime Training Group | Bristol, City of | 1 | 1 |
| Link Asset Services | City of London | 1 | 1 |
| London Grid for Learning Trust | City of London | 1 | 1 |
| Merton Chamber of Commerce | Merton | 1 | 1 |
| Merton Health | Merton | 1 | 1 |
| Merton Home Tutoring Service | Mitcham | 1 | 1 |
| Nexbib Nordic A S | Hvidovre | 1 | 1 |
| Okra Studio CIC | Southwark | 1 | 1 |
| Partnershipforyounglondon | City of London | 1 | 1 |
| Reddington Groundworks | Epsom and Ewell | 1 | 1 |
| Royal Free London NHS Trust | Camden | 1 | 1 |
| Seabrook Warehousing | Thurrock | 1 | 1 |
| Serco Knowledge Skills & Childrens Services | Bromsgrove | 1 | 1 |
| South Thames Colleges Group | Kingston upon Thames | 1 | 1 |
| SR Supply Chain Consultants | Blackburn with Darwen | 1 | 1 |
| Symes Garden Services | Sutton | 1 | 1 |
| T Brown | Ewell | 1 | 1 |
| Vantage Facilities | Spelthorne | 1 | 1 |
| Ward & Burke Construction | Kilcolgan | 1 | 1 |
| Warhurst Bourne | Southwark | 1 | 1 |