| Coleraine Sure Start Partnership | Coleraine | 2002 |
| Colerne After School Club Limited | Chippenham | 2015 |
| Colerne Preschool Limited | Chippenham | 2019 |
| Coles Cosmetics Ltd | Deptford | 2022 |
| Colestartraining Ltd | Shotts | 2018 |
| Colette Mcbeth Storytelling Ltd | London | 2023 |
| Coleztrades Limited | London | 2024 |
| Colfe's School | | 2005 |
| Colibri Center for Systemic Training Ltd | London | 2025 |
| Colin Brett Limited | Luton | 2013 |
| Colin Chapman Foundation | Norwich | 2016 |
| Colin Cooper Dragonfly Football Consultancy Limited | Harrogate | 2019 |
| Colin Fitzgerald Consultancy Limited | Hastings | 2023 |
| Colin Scott Music Limited | Craigavon | 2018 |
| Colin Smith Educational Consultancy Limited | Horley | 2012 |
| Colin Southern Ltd | Skelmersdale | 2010 |
| Colinhillswims Ltd | Penrith | 2018 |
| Colinton Nurseries Limited | Edinburgh | 2003 |
| Colinwilliam(Nw) Ltd | Warrington | 2025 |
| Coliseum of Chaos Ltd | Hull | 2025 |
| Colk & Rose Academy Ltd | Norwich | 2026 |
| Collab EDU Limited | London | 2021 |
| Collab Limited | Grays | 2007 |
| Collabhub Limited | Dunstable | 2021 |
| Collaborarti CIC | Huddersfield | 2024 |
| Collaborate Digital Ltd | Liverpool | 2017 |
| Collaborate Future Ready CIC | Shepperton | 2024 |
| Collaborate Sports Mentoring Ltd | Shepperton | 2024 |
| Collaborate Training Services Ltd | Norwich | 2021 |
| Collaborative Counselling Academy Ltd | Welwyn | 2020 |
| Collaborative Education and Training Services Ltd | London | 2025 |
| Collaborative Education Support Ltd | Leeds | 2021 |
| Collaborative Education Trust | Solihull | 2011 |
| Collaborative Leadership Ltd | Rochdale | 2013 |
| Collaborative Learning Trust | Otley | 2011 |
| Collaborative Montessori Ltd | London | 2021 |
| Collaborative Schools Ltd | Trowbridge | 2012 |
| Collage Arts. | London | 1993 |
| Collage Club Ltd | London | 2018 |
| Collateral Educational Enterprises Limited | Borehamwood | 2009 |
| Collatz Capital Ltd | London | 2023 |
| Colle Limited | Wimborne | 2025 |
| Collec Z Ltd | London | 2026 |
| Collections Trust | Leicester | 1977 |
| Collective Beat CIC | London | 2025 |
| Collective Coaching Ltd | Thames Ditton | 2024 |
| Collective Imagination Community Ltd | Stourbridge | 2020 |
| Collective Imagination Ltd | Stourbridge | 2003 |
| Collective Learning Limited | Monmouthshire | 2010 |
| Collective Progress CIC | London | 2025 |
| Collective Training Ltd | Bootle | 2026 |
| Collective Vision Trust | Newcastle | 2013 |
| COLLECTIVE6 CIC | London | 2026 |
| Collectively Diverse C.I.C. | Paignton | 2025 |
| Collectivistx Limited | London | 2025 |
| Colleen Loughran Specialist Training Academy Ltd | Pomeroy | 2021 |
| Colleen Sodano Ltd | London | 2023 |
| College CAN DO CIC | Huddersfield | 2023 |
| College Connection Ltd | London | 2010 |
| College Development Network | Stirling | 1993 |
| College for Innovation and Growth Ltd | London | 2026 |
| College for International Cooperation and Development | Hull East Riding Of Yorkshire | 1997 |
| College Francais Bilingue DE Londres Ltd | London | 1993 |
| College House N.Z. Trust | Burgess Hill | 2012 |
| College London City Ltd | Ilford | 2016 |
| College of Accountancy (UK) Ltd | Pinner | 2008 |
| College of Advanced Education, London Ltd | London | 2018 |
| College of ALL Saints Foundation (the) | London | 1964 |
| College of Applied Interdisciplinary Ltd | London | 2024 |
| College of Apprenticeships Ltd | London | 2024 |
| College of Arts and Humanities Ltd | London | 2025 |
| College of Birmingham | Coventry | 2013 |
| College of Bowen Studies Ltd | Bury St. Edmunds | 2019 |
| College of Business & Finance Ltd | London | 2020 |
| College of Central England Ltd | Birmingham | 2022 |
| College of Cognitive Behavioural Therapies Ltd | London | 2008 |
| College of Contract Management United Kingdom Ltd | Guildford | 2013 |
| College of Dentistry Limited | Birmingham | 2018 |
| College of Digital Leadership Limited | London | 2022 |
| College of Doctoral Studies (Dcuk) | Newcastle Upon Tyne | 2025 |
| College of Enterprise and Innovation Ltd | London | 2024 |
| College of Esports Limited | London | 2020 |
| College of Excellence Ltd | London | 2018 |
| College of Healing Limited | Ledbury | 1987 |
| College of Homeopathy (UK) Ltd | London | 2026 |
| College of Independent Trainers Limited | Kingston Upon Thames | 2023 |
| College of International Business Management Ltd | Manchester | 2026 |
| College of Islamic Studies and Sciences Ltd | London | 2019 |
| College of Law Services Limited | London | 2012 |
| College of Leeds UK Ltd | London | 2025 |
| College of Legal Practice Limited | Leeds | 2018 |
| College of London Limited | London | 2022 |
| College of Media and Publishing Ltd | Chichester | 2004 |
| College of Modern Anxiety CIC | London | 2024 |
| College of North London Limited | London | 2023 |
| College of North West London | London | 2017 |
| College of Paramedics Learning and Education Limited | Bridgwater | 2014 |
| College of Public Speaking 2006 Limited | Bromley | 2021 |
| College of Science Engineering and Management Ltd | Smethwick | 2024 |
| College of Security Ltd | Eastleigh | 2017 |