| Cannons Health Clubs Limited | Epsom | 1998 |
| Cannons Sports Clubs (U.K.) Limited | Epsom | 1979 |
| Cannons Wood FC Ltd | Romford | 2021 |
| Cannonscoaching Ltd | Horley | 2025 |
| Canny Comps Limited | Durham | 2022 |
| Canny Crafty Ltd | Newcastle Upon Tyne | 2017 |
| Canny Queer Collective CIC | Newcastle Upon Tyne | 2024 |
| Canoe Adventures Ltd | Totnes | 1999 |
| Canoe and Kayak Tours Ltd | Maidenhead | 2012 |
| Canoe Club (Freehold) Limited | Teddington | 1931 |
| Canoe Foundation | Nottingham | 2007 |
| Canoe Sports Trust C.I.C. | Hemel Hempstead | 1996 |
| Canoe Wild Limited | Canterbury | 2012 |
| CANOE2 Limited | Rushden | 2009 |
| Canoeing Heritage Limited | Runcorn | 2026 |
| Canolfan a Menter Gymraeg Merthyr Tudful | Merthyr Tydfil | 2007 |
| Canolfan Ceiriog Centre CYF | Llangollen | 2003 |
| Canolfan Crannog | Llandysul | 2012 |
| Canolfan Cymunedol Derwenlas Community Centre | Machynlleth | 2012 |
| Canolfan Gymunedol Capel Curig Community Centre | Betws Y Coed | 2004 |
| Canolfan Hamdden Beaumaris A'R Cylch | Beaumaris | 2012 |
| Canomi Limited | Kensington | 2015 |
| Canon Prime Ltd | London | 2017 |
| Canonfit Limited | Edinburgh | 2026 |
| Canons Brook Golf Club Limited | Essex. | 1962 |
| Canons Enterprises Limited | Middlesex | 1992 |
| Canonteign Events Limited | Exeter | 2012 |
| Canopy Audiobooks Ltd | London | 2024 |
| Canopy Network Community Interest Company | Coleford | 2024 |
| Canopy Pictures Limited | London | 2024 |
| Canoville Coaching Limited | Northampton | 2015 |
| Canoville Football Club Ltd | Nottingham | 2025 |
| Canoville Gym Limited | Nottingham | 2023 |
| Cant Save Everyone Ltd | Glasgow | 2021 |
| Cantab Leisure Limited | Croydon | 2014 |
| Cantabgilly Ltd | Dursley | 2010 |
| Cantabile Publications Limited | Cambridge | 2014 |
| Cantabile Touch Ltd | Newcastle Upon Tyne | 2023 |
| Cantabrigian Limited | Cambridge | 1995 |
| Cantaloop Fitness Ltd | Romford | 2024 |
| Cantantes Solares Ltd | Corsham | 2025 |
| Cantefield Ltd | Norwich | 2012 |
| Canter Golf Limited | Cardiff | 2015 |
| Canterbury & District Indoor Bowling Association Limited | Whistable | 1980 |
| Canterbury Archers | Ashford | 2015 |
| Canterbury Cantata Trust | Canterbury | 2012 |
| Canterbury City Football Club CIC | Folkestone | 2007 |
| Canterbury Combatives Ltd | Canterbury | 2021 |
| Canterbury Golf Club Limited | Canterbury | 1927 |
| Canterbury Lawn Tennis Club Limited | Faversham | 2022 |
| Canterbury Lawn Tennis Club Trustees Limited(The) | Canterbury | 1965 |
| Canterbury Lawn Tennis Trading Ltd | Faversham | 2026 |
| Canterbury Live Limited | Enfield | 2025 |
| Canterbury Orchestra Productions Ltd | Margate | 2018 |
| Canterbury Rhythmic Gymnastics Ltd | Ashford | 2025 |
| Canterbury Rugby Charity | Canterbury | 2011 |
| Canterbury Squash Rackets Club Limited | Canterbury | 2023 |
| Canterbury Theatre and Festival Trust | Canterbury | 1980 |
| Cantermain Limited | Stratford-Upon-Avon | 1982 |
| Cantilena Festival on Islay | Glasgow | 2002 |
| Cantina Studio Ltd | Bridport | 2020 |
| Cantley Community Centre | Cantley, Doncaster | 2005 |
| Cantlosefitness Ltd | London | 2025 |
| Cantonese Reading Playground CIC | Manchester | 2024 |
| Cantoo Limited | Tamworth | 2005 |
| Cantormasters Limited | London | 2011 |
| Cantref Adventure Farm Limited | Bridgwater | 2012 |
| Cantref Riding Limited | Somerset | 2007 |
| Canus Cube Ltd | London | 2025 |
| Canvas Boxing Fitness Ltd | London | 2025 |
| Canvas Cave Studios Ltd | Glasgow | 2021 |
| Canvas Enterprises Limited | Hampton Hill | 2003 |
| Canvas Galleries Limited | Carryduff | 2009 |
| Canvas Solstice Ltd | Hull | 2025 |
| Canvas Southside Ltd | Belfast | 2025 |
| Canvas Sports Group Ltd | Colindale | 2024 |
| CANVAS13 Ltd | Basildon | 2025 |
| Canvey Castles Limited | Benfleet | 2022 |
| Canvey Competitions Limited | Canvey Island | 2025 |
| Canvey Fest Limited | Bury St. Edmunds | 2025 |
| Canvey Island Football Club Limited | Canvey Island | 2002 |
| Canzona Club Ltd | London | 2021 |
| Canzona Ltd | Salisbury | 2005 |
| CAO Academy Ltd | Bracknell | 2023 |
| Caoilfhionn Dunne Ltd | Worcester | 2025 |
| Caol Ruadh Park Ltd | Colintraive | 2012 |
| Caonefour Limited | Harpenden | 2015 |
| CAP ATL Ltd | Cheadle | 2016 |
| CAP Production Solutions Limited | Carshalton | 2003 |
| Cap-A-Pie Engagements | Newcastle Upon Tyne | 2014 |
| CAP10 Talent Management Ltd | London | 2024 |
| Capability Events Limited | Malvern | 2008 |
| Capacity Consulting Limited | Welwyn | 2011 |
| Capall (Scotland) Limited | Strathaven | 2018 |
| Capall Dorcha Ltd | Troon | 2013 |
| Capay Audio Ltd | Royston | 2021 |
| Cape 31 MED Events Limited | London | 2026 |
| Cape Cause Ltd | Ruislip, | 2025 |
| Cape Cuvier Limited | | 2000 |
| Cape Farewell (0CEAN) | Dorchester | 2002 |