| Culverden Tutors Ltd | Tunbridge Wells | 2019 |
| Cumberland College Ltd | London | 2023 |
| Cumbernauld & Kilsyth Nursery and OUT of School Care Limited | Cumbernauld | 2004 |
| Cumbernauld Gymnastics Club Ltd | Glasgow | 2018 |
| Cumbria Academy Limited | Durham | 2024 |
| Cumbria Arts and Culture Network Ltd | Keswick | 2022 |
| Cumbria Christian Learning | Penrith | 2002 |
| Cumbria Clil Ltd | Carlisle | 2013 |
| Cumbria Clinical Training Limited | Carlisle | 2025 |
| Cumbria Credits | Carlisle | 2002 |
| Cumbria Driving Academy Ltd | Egremont | 2022 |
| Cumbria Education Trust | Brampton | 2011 |
| Cumbria Health and Safety Ltd | Kirkby Stephen | 2017 |
| Cumbria Personal Development Associates Ltd | Ulverston | 2003 |
| Cumbria Primary Headteachers' Association | Carlisle | 2014 |
| Cumbria Rural Academy CIC | Ulverston | 2009 |
| Cumbria Teaching Agency Limited | Ulverston | 2015 |
| Cumbria Youth Alliance | Workington | 1999 |
| Cumbric (NE) Limited | North Shields | 2015 |
| Cumnor House School Trust | Haywards Heath | 1989 |
| Cundall Manor Limited | York | 1972 |
| Cunha & Ribeiro Ltd | Birmingham | 2022 |
| Cunnink Ltd | London | 2024 |
| Cuore Chamber Orchestra Ltd | Harrogate | 2024 |
| CUP of Parenting Ltd | Newcastle Upon Tyne | 2021 |
| CUP Trading Limited | Birmingham | 2021 |
| Cupcakes 'N' Dinosaurs, New Inn Limited | Cwmbran | 2015 |
| Cupcakes Nurseries Limited | St Albans | 2011 |
| Cuppy Cares CIC | Leighton Buzzard | 2024 |
| Cura Collective Limited | Burton-On-Trent | 2025 |
| Curaco Ltd | Leeds | 2025 |
| Curacorn International Ltd | Manchester | 2025 |
| Curacorn Limited | Manchester | 2023 |
| Curadent Ltd | London | 2025 |
| Curae Studios Ltd | London | 2025 |
| Curate Education Consulting Ltd | Glasgow | 2025 |
| Curated by Sandler Ltd | London | 2025 |
| Curated Learning Limited | Halifax | 2019 |
| Curativate Limited | Anstruther | 2019 |
| Curee Limited | Penrith | 2003 |
| Curio Learners Ltd | Purley | 2025 |
| CURIO06 Ltd | London | 2026 |
| Curiosa Ltd | London | 2020 |
| Curiositree Ltd | Radstock | 2026 |
| Curiosity AI Labs Ltd | Birmingham | 2026 |
| Curiosity Consulting Limited | Tarleton | 2023 |
| Curiosity Cottage Ltd | Barnsley | 2026 |
| Curiosity Events CIC | Norwich | 2025 |
| Curiosity Global Education Ltd | Lincoln | 2014 |
| Curiosity Learning Ltd | Tonbridge | 2016 |
| Curious by Nature London CIC | London | 2021 |
| Curious Cooks Ltd | Cheltenham | 2022 |
| Curious Cubs Ltd | London | 2014 |
| Curious Explorers Ltd | Fleet | 2015 |
| Curious Gorilla Limited | London | 2021 |
| Curious Hearts Ltd | Brackley | 2026 |
| Curious Kids Club Ltd | Uxbridge | 2024 |
| Curious Kids Limited | Epsom | 2022 |
| Curious Kids Science Ltd | Cramlington | 2026 |
| Curious Lighthouse Learning Consultancy Ltd | Waterlooville | 2016 |
| Curious Little Bears Ltd | Shifnal | 2021 |
| Curious Little Minds Ltd | Sheffield | 2026 |
| Curious Maths Ltd | Dinas Powys | 2017 |
| Curious Minds | Wigan | 2008 |
| Curious Minds Day Nursery Ltd | Worksop | 2025 |
| Curious Minds Education Ltd | Feltham | 2026 |
| Curious Minds Nursery Ltd | Potters Bar | 2020 |
| Curious Munchkins Ltd | London | 2025 |
| Curious Muse Ltd | London | 2021 |
| Curious Pursuits Ltd | Blackwood | 2022 |
| Curious School of Puppetry | London | 2015 |
| Curious Spark Ltd | Norwich | 2019 |
| Curious Tales Ltd | Flax Bourton | 2021 |
| Curious Vitae Limited | Ipswich | 2015 |
| Curious-Kidstown Ltd | Sheffield | 2017 |
| Curiouser Group Limited | London | 2021 |
| Curiously Divergent Services Ltd | Peterborough, Uk | 2024 |
| Curiously YOU Ltd | London | 2025 |
| Curiousminds Montessori Ltd | South Croydon | 2022 |
| Curl Around Childcare Limited | Beaconsfield | 2004 |
| Curlaborate Ltd | Derby | 2026 |
| Curls Coils and CIC | London | 2026 |
| Curlygirly Ltd | Chesterfield | 2025 |
| Curo Training Ltd | Bridgend | 2023 |
| Curo Tutors Limited | Ilford | 2024 |
| Currency Counters Ltd | Dartford | 2012 |
| Currency Trading Ltd | Birmingham | 2020 |
| Current Clinician Ltd | London | 2025 |
| Currents Early Years Ltd | London | 2026 |
| Currents Training Solutions Ltd | Hertford | 2026 |
| Curricula Solutions Ltd | Birmingham | 2020 |
| Curricular Tuition Ltd | Manchester | 2015 |
| Curriculink Ltd | Dundee | 2022 |
| Curriculo Solutions Ltd | Glasgow | 2013 |
| Curriculum and Quality Solutions Ltd | Barnsley | 2015 |
| Curriculum Enterprise Limited | Marlborough | 1995 |
| Curriculum for Tomorrow Ltd | Batley | 2024 |
| Curriculum Matters Limited | Shrewsbury | 2020 |
| Curriculum on Camera Ltd | Nuneaton | 2017 |
| Curriculum Solutions Ltd | London | 2025 |