| Collective Endeavour Limited | Harrow | 2025 |
| Collective Hairdressing Ltd | Dunfermline | 2024 |
| Collective Health UK Ltd | Loughborough | 2022 |
| Collective Malvern Limited | Worcester | 2025 |
| Collective Networking Ltd | Ayr | 2025 |
| Collective Studios Hair and Beauty Limited | Aberdeen | 2024 |
| Collective Talents Inc Limited | London | 2020 |
| Collective Thinking Ltd | Borehamwood | 2026 |
| Collectivehairstudios Ltd | Leeds | 2022 |
| Collectivenex Ltd | Telford | 2023 |
| Collectivism Ltd | Waterlooville | 2025 |
| Collectors Universe (UK) Limited | Altrincham | 2024 |
| Collectors/Curators Limited | London | 2013 |
| Colledge Engineering Limited | Coventry | 2012 |
| Colleen's Culturelounge Salon Ltd | Edinburgh | 2024 |
| Collega Ltd | Washington | 2024 |
| College Bench Limited | Heaton Mersey | 2012 |
| College Garth Limited | Leicester | 2017 |
| College of Mediators | Stoke-On-Trent | 1996 |
| College of Mental Health Pharmacy | Fareham | 2010 |
| College of Paramedics | Bridgwater | 2004 |
| College of Radiographers(The) | | 1976 |
| College of Social Work | Birmingham | 2010 |
| College of Work and Health | London | 2025 |
| Collegial Project Management Ltd. | Lauder | 2024 |
| Collektiv Limited | London | 2025 |
| Coller Family Foundation | London | 2014 |
| Colleran Investments Limited | Heckmondwike | 2026 |
| Colleton Crescent Gardens Management Company Limited | Exeter | 2015 |
| Collett Aviation Services Ltd | Hemel Hempstead | 2017 |
| Collie Engineering Consultants Limited | Aberdeen | 2013 |
| Collie Media Limited | London | 2023 |
| Collier Rebar Limited | Gillingham | 2013 |
| Collinge & Co Limited | Wirral | 1976 |
| Collinge & Co Training Limited | Wirral | 1964 |
| Collingham Community Trust Limited | Newark | 2001 |
| Collingham Drycleaners Limited | Wetherby | 2015 |
| Collingnam Limited | Caterham | 2004 |
| Collington Scotland Ltd | Stirling | 2026 |
| Collingwood Centre Limited | Pheasey | 2001 |
| Collingwood Court Chertsey Right to Manage Company Limited | Chertsey | 2010 |
| Collingwood Day Nursery Limited | Leicestershire | 2003 |
| Collingwood Learning Solutions Limited | Holmfirth | 2009 |
| Collingwoods Funeral Services Ltd | Grimsby | 2016 |
| Collins & Quinn Funeral Services Ltd | Greenock | 2022 |
| Collins & Theresa Oforduru Ltd | Crawley | 2024 |
| Collins DRY Cleaners Greenwich Limited | London | 2021 |
| Collins Estates (North West) Limited | Hoylake | 2024 |
| Collins Farrier Ltd | Bristol | 2020 |
| Collins Funeral Directors Ltd | St. Albans | 2022 |
| Collins Gardens Ltd | Fleet | 2018 |
| Collins Physio Ltd | Altrincham | 2020 |
| Collins Retirement Limited | London | 2009 |
| Collins Training Limited | Nottingham | 2013 |
| Collins Wilson Trading Limited | Paisley | 2018 |
| Collinson Investments Limited | London | 2018 |
| Collinson Performance & Training Ltd | Sheffield | 2018 |
| Collinson Ventures Limited | London | 2026 |
| Collinsons Hair Limited | Dundee | 2008 |
| Collision Aftercare Limited | Rotherham | 2016 |
| Collision Claims Limited | Limavady | 2020 |
| Collistear Hair Ltd | Bristol | 2016 |
| Collum Hair Limited | London | 2002 |
| Collusion Studios Ltd | Grangemouth | 2024 |
| Collyer & Telford Ltd | London | 2025 |
| Colman & Colman Hairdressers Limited | Kendal | 2017 |
| Colman Coyle Holdings Limited | London | 2024 |
| Colmore Group (Developments) Limited | Coventry | 2020 |
| Colmore Group (Investments) Limited | Coventry | 2020 |
| Colne BID Limited | Colne | 2018 |
| Colne Blues Society Ltd | Colne | 2022 |
| Colne Forklifts Limited | Colchester | 2017 |
| Colne Masonic Hall Limited(The) | Colne, | 1920 |
| Colne Stoves & Fireplaces Ltd. | Colchester | 1994 |
| Colne Trading Company Limited | London | 2024 |
| Colne Valley Aesthetics Ltd | Colchester | 2024 |
| Colne Valley Cosmetics Ltd | Huddersfield | 2025 |
| Colne Valley Funeral Service Limited | Witham | 2000 |
| Colne Valley Riding Club Ltd | Clacton-On-Sea | 2023 |
| Colney Farm Barns (2011) Ltd | Harefield | 2011 |
| Colney Hatch Freeholders Limited | Friern Barnet | 2013 |
| Colney Windows & Doors Limited | St. Albans | 2019 |
| Cologne Hair Stylist Ltd | Enfield | 2018 |
| Cologne Road NO 24 Limited | Cambridge | 2005 |
| Colombian Diaspora CIC | London | 2025 |
| Colombo Digital Ltd | Stanmore | 2026 |
| Colombo Scissors Ltd | Liverpool | 2025 |
| Colonia Properties Limited | Barnsley | 2021 |
| Colonsay Community Development Company | Isle Of Colonsay | 2000 |
| Colony Barbers Ltd | Birmingham | 2023 |
| Colonyx Limited | Tunbridge Wells, Kent | 2020 |
| Colophon Arts Limited | London | 2011 |
| Color Coded Limited | Pontefract | 2016 |
| Color Court Limited | Caldicot | 2016 |
| Color GLO MK Ltd | Leighton Buzzard | 2022 |
| Color Hauz Ltd | London | 2020 |
| Color ME Ltd | Broadstairs | 2013 |
| Color POP Limited | Orpington | 2015 |
| Color Ventures Limited | Hounslow | 2017 |
| Colorations Limited | St Asaph | 2024 |