| COREAXIS2 Ltd | Norwich | 2025 |
| Corecare N/A Ltd | Newton Aycliffe | 2010 |
| Coreconcepts Training Ltd | Ibstock | 2026 |
| Cored Training Services Limited | Keighley | 2021 |
| Coreed Limited | Huddersfield | 2019 |
| Corem Ltd | Dundee | 2026 |
| Coremcq Ltd | London | 2026 |
| Corenthia Education Limited | London | 2024 |
| Corestar Smib Ltd. | London | 2023 |
| Coretones Ltd | Redhill | 2025 |
| Coretutors Ltd | London | 2024 |
| Corevison Consulting Ltd | Nottingham | 2024 |
| Corex Education Ltd | London | 2025 |
| Corfe Hills School Academy Trust | Broadstone | 2011 |
| Corfe Valley Outdoor Learning Ltd | Wareham | 2024 |
| Cori Loves Life Limited | London | 2026 |
| Corinium Education Trust | Cirencester | 2011 |
| Corinium Training Limited | Cirencester | 2017 |
| Corinne Bracken Equestrian Limited | Aldershot | 2009 |
| Corinth Business and Community Training C.I.C. | Manchester | 2020 |
| Corinth Education C.I.C. | Manchester | 2026 |
| Corio Ltd | Bristol | 2020 |
| Coritani Creative Ltd | Barnetby | 2022 |
| Corkerz Guardianship Ltd | Northampton | 2009 |
| Corkscrew Ltd | Exeter | 2010 |
| Cormac Butler Limited | Luton | 2018 |
| Cormeym Limited | London | 2025 |
| Cornagh Consultancy Ltd | Dungannon | 2019 |
| Corndel Education Ltd | London | 2021 |
| Corndel Limited | London | 2016 |
| Cornea Global Education Limited | London | 2025 |
| Cornelius Vermuyden School | Canvey Island | 2013 |
| Cornell University Foundation (UK) Limited | London | 2012 |
| Corner Club CIC | London | 2025 |
| Corner Consultancy Ltd | St. Helens | 2022 |
| Cornerhouse Day Nursery Ltd | Oldham | 2012 |
| Cornerhouse Nursery Limited | | 2002 |
| Cornerstone Academy Ltd | London | 2005 |
| Cornerstone Academy Trust | Exeter | 2010 |
| Cornerstone Alternative Education Ltd | Crewe | 2020 |
| Cornerstone ASC Ltd | Rainham | 2016 |
| Cornerstone College Cambridge Ltd | Cambridge | 2022 |
| Cornerstone College of International Studies Limited | London | 2021 |
| Cornerstone Consultants Ltd | Chichester | 2024 |
| Cornerstone Consults (UK) Ltd | Covent Garden | 2007 |
| Cornerstone Day Nursery (Sydenham) Limited | London | 2020 |
| Cornerstone Driver Training Limited | Cottingham | 2026 |
| Cornerstone Education Ltd | Romford | 2025 |
| Cornerstone Engagement CIC | London | 2018 |
| Cornerstone Family Services Ltd | London | 2026 |
| Cornerstone Family Support Ltd | Birmingham | 2017 |
| Cornerstone Group of Nurseries Limited | London | 2008 |
| Cornerstone Learning CIC | Basingstoke | 2024 |
| Cornerstone Medical Education Ltd | Leicester | 2020 |
| Cornerstone Portsmouth Ltd | Havant | 2023 |
| Cornerstone Training North West Limited | Kendal | 2011 |
| Cornerstone Tutors Ltd | Richmond | 2015 |
| Cornerstone Vocational Training Limited | Wallasey | 2002 |
| Cornerstone Youth Link Stevenage | Stevenage | 2007 |
| Cornerstones Education Limited | Sheffield | 2010 |
| Cornerstones Pre-School Limited | Hertfordshire | 2003 |
| Cornfields 2019 Limited | Huddersfield | 2019 |
| Cornfields Day Nursery Limited | West Yorkshire | 2007 |
| Cornhill Scotland | Glasgow | 2005 |
| Cornish Birds of Prey CIC | St Columb | 2017 |
| Cornish Blacksmiths Collective C.I.C. | Penryn | 2024 |
| Cornish DC Limited | Coleford | 2023 |
| Cornish Heritage Company Limited(The) | Penzance | 1984 |
| Cornish Pasty Association Community Interest Company | Truro | 2011 |
| Cornish Sea School C.I.C. | Falmouth | 2020 |
| Cornish Tech Centre Ltd | Falmouth | 2025 |
| Cornmeadow Early Years and Families Limited | Worcester | 2015 |
| Cornucopia Cups Ltd | Forres | 2021 |
| Cornwall Adventure Limited | St. Austell | 2007 |
| Cornwall and Devon Creative Collective CIC | Torpoint | 2024 |
| Cornwall Association of Primary Headteachers Co-Operative CIC | St. Austell | 2014 |
| Cornwall Bike Training Ltd | Redruth | 2020 |
| Cornwall Centre for Culture and the Arts C.I.C. | Redruth | 2020 |
| Cornwall Creative Arts CIC | Par | 2022 |
| Cornwall EAR Care Clinic Ltd | Truro | 2026 |
| Cornwall Education Learning Trust | St Austell | 2011 |
| Cornwall Educational Psychology Ltd | St. Austell | 2012 |
| Cornwall Equine Learning Academy CIC | Cubert | 2026 |
| Cornwall Eventing Academy CIC | Truro | 2024 |
| Cornwall Montessori Ltd | Truro | 2021 |
| Cornwall Music Service Trust | Cornwall | 2014 |
| Cornwall Nurseries Limited | Truro | 2023 |
| Cornwall Outdoors Limited | St Austell | 2024 |
| Cornwall Saracens Basketball CIC | Newquay | 2023 |
| Cornwall School of Painting Limited | St. Ives | 2022 |
| Cornwall Therapy Hub CIC | Truro | 2026 |
| Cornwall Wildlife Trust | Truro | 1962 |
| Cornwall Women of Colour Collective CIC | Truro | 2026 |
| Cornwall&Co. Ltd | London | 2025 |
| Cornwallis Online Limited | Maidstone | 2003 |
| Cornwell Dunnett Limited | Woodbridge | 2011 |
| Cornwool Craftivista CIC | Falmouth | 2018 |
| Coronando PA Ltd | London | 2025 |
| Corpar Education Ltd | Loughborough | 2023 |
| Corporate Collective Ltd | London | 2024 |