| Caterham School International Limited | Caterham | 2019 |
| Caterham Valley Parish Hall Company,Limited(The) | Caterham | 1913 |
| Caterpillar Club and Bumble Bees C.I.C. | Chester Le Street | 2006 |
| Caterpillar Day Nursery Ltd | Market Harborough | 2010 |
| Caterpillar Music Limited | Ashtead | 2018 |
| Caterpillar Nursery (Leamington Spa) Limited | Leamington Spa | 2004 |
| Caterpillar Preschools Limited | Reading | 2018 |
| Caterpillars Montessori Limited | Alton | 2006 |
| Caterpillars Nursery.Co.Uk Ltd | Wolverhampton | 2006 |
| Caterpillars Pre-School | Marks Tey | 2010 |
| Caterpillars Pre-School Walton Limited | Sunbury-On-Thames | 2015 |
| Caterpillars Preschool (Coldean) Ltd | Borehamwood | 2009 |
| Catey Pre-School | Bury St. Edmunds | 2008 |
| Cath Delve Consultancy Limited | Cardiff | 2015 |
| Cath Longhurst Consulting Ltd | Waterlooville | 2020 |
| Cathar Country Ltd | Barrow-Upon-Humber | 2019 |
| Cathay Education Development Limited | Oxford | 2005 |
| Cathays & Central Youth and Community Project | Cardiff | 2007 |
| Cathedral Quarter Trust | Belfast | 2012 |
| Cathedral Schools Trust | Bristol | 2008 |
| Cathedral View Childcare Ltd | Ely | 2018 |
| Catherine AMY Aesthetics Training Academy Ltd | Liverpool | 2021 |
| Catherine AXE Ltd | Mytholmroyd | 2024 |
| Catherine Barber Ltd | Rotherham | 2022 |
| Catherine Bowie Training Services Limited | Edinburgh | 2009 |
| Catherine Caldwell Education Consultancy Limited | Lincoln | 2016 |
| Catherine Cheung Piano Studio Ltd | Barnet | 2024 |
| Catherine Grace Trust | Stroud | 1948 |
| Catherine Lowe Tuition Ltd | High Wycombe | 2024 |
| Catherine Merridale Limited | Chipping Norton | 2012 |
| Catherine Muller Flower School London Limited | Chatham | 2012 |
| Catherine Priggs Education Ltd | Rickmansworth | 2025 |
| Catherine School of London Limited | Ilford | 2025 |
| Catherine Semark Ltd | Hertfordshire | 2006 |
| Catherine Skinner Enterprises Ltd | Mitcham | 2024 |
| Catherine Taylor the Academy Ltd | Hook | 2020 |
| Catherine Wright Limited | Banbury | 2000 |
| Catherinearolt Ltd | Worthing | 2023 |
| Catherington Nursery | Waterlooville | 2006 |
| Catholic Blind Institute | Liverpool | 2004 |
| Catholic Independent Schools' Conference | Torquay | 1997 |
| Catholic Support Services Limited | Salford | 1993 |
| Catholic Voices | Hexham | 2011 |
| Catholicplus Limited | Addlestone | 2023 |
| Cathy Berry Driving Instructor Ltd | Thatcham | 2025 |
| Catilyst Academy UK CIC | Leicester | 2025 |
| Catlaw Limited | Canterbury | 2020 |
| Cats Aviation Academy Ltd | Luton | 2016 |
| Cats Aviation UK Limited | Luton | 2016 |
| Cats Dance Academy Ltd | London | 2021 |
| Cats Eyes Driving School Limited | Vale Of Glamorgan | 2000 |
| Cats International Limited | Luton | 2009 |
| Cats Retail Limited | Cambridge | 2007 |
| Catstream (UK) Training Limited | Brighton | 2016 |
| Catstream Drivers Disability Awareness Training Limited | Brighton | 2016 |
| Cattermole Tutoring and Coaching Ltd | Clevedon | 2024 |
| Catway Training Ltd | Sale | 2023 |
| Caucasus Cultural Centre CIC | London | 2024 |
| Cause Youth Project C.I.C. | London | 2026 |
| Causeway Coast & Glens Aims | Ballymoney | 2017 |
| Causeway Education Ltd | London | 2014 |
| Causeway Languages Ltd | Belfast | 2017 |
| Causeway School of Music Ltd | Coleraine | 2019 |
| Causeway Sports Academy CIC | Portstewart | 2023 |
| Cave Martial Arts Academy Ltd | Trowbridge | 2026 |
| Cave of Adullam CIC | Bray On Thames | 2025 |
| Cave Professional Development Ltd | Hull | 2025 |
| Cavebus Limited | Barnsley | 2020 |
| Cavell College Ltd | London | 2024 |
| Cavendish Education International Ltd | London | 2024 |
| Cavendish Education Technology (UK) Ltd | Wisbech | 2022 |
| Cavendish Education Trust | Eastbourne | 2012 |
| Cavendish House Private Nursery Ltd | Doncaster | 2007 |
| Cavendish International Education Limited | London | 2012 |
| Cavendish Learning (London) Ltd | London | 2015 |
| Cavendish Learning Limited | London | 2007 |
| Cavendish Milton Ltd. | London | 2018 |
| Cavendish OUT of School Club Limited | Nottingham | 2014 |
| Cavendish School of English Limited | Dorset | 1995 |
| Caversham Muslim Association | Reading | 2023 |
| Caversham Park Kindergarten Ltd | Reading | 2017 |
| Caves Driving School Limited | Peterborough | 2017 |
| Cavillion Ltd | London | 2023 |
| Cavite Training Limited | London | 2016 |
| Cavms Limited | Newport | 2004 |
| CAW Consultancy Ltd | Middlesbrough | 2025 |
| Cawston Grange Primary School | Rugby | 2013 |
| Cawthorne Children's Centre | Barnsley | 2002 |
| Cawthorne Road Day Nursery Limited | Barnsley | 2003 |
| CAY College CIC | Worthing | 2023 |
| Caz’S Kiddies Limited | Berwick Upon Tweed | 2023 |
| CB & Partners Limited | London | 2025 |
| CB Athletics Limited | Billericay | 2022 |
| CB Aviation Services Ltd | Doncaster | 2026 |
| CB Coaching Ltd | Redhill | 2021 |
| CB Collier ROW Limited | Loughton | 2013 |
| CB Communications Group Ltd | Birmingham | 2018 |
| CB Counsellor Training Ltd | Godstone | 2021 |
| CB Early Years & Education Ltd | Ravenfield | 2019 |
| CB Education Ltd | London | 2021 |