| Campioni Events Limited | Loughton | 2016 |
| Campo Sancho Limited | London | 2017 |
| Camps & Clinics Limited | Formby | 2020 |
| Camps at Horsley Sports Club Limited | Hartley Wintney | 2024 |
| Campsie Glen Woodland CIC | Glasgow | 2021 |
| Campsie Indoor Ltd | Londonderry | 2014 |
| Campsites Website Limited | Hemel Hempstead | 2024 |
| Campus Learning Limited | Holinwood | 2000 |
| Campus Nottingham Limited | London | 2019 |
| Camrowers | Cambridge | 2010 |
| Camscott Leisure Limited | Poulton-Le-Fylde | 2003 |
| Camstage Limited | Herts | 2003 |
| Camtown Ltd | High Wycombe | 2022 |
| Camyleo Ventures Ltd | London | 2026 |
| CAN Art Ltd | Hertford | 2026 |
| CAN BUT TRI Ltd | Norwich | 2018 |
| CAN GBB Ltd | London | 2025 |
| CAN Management Limited | Telford | 2012 |
| CAN WE Just Play | London | 2026 |
| CAN YOU Challenge F.C Ltd | Hounslow | 2025 |
| CAN YOU Feel IT Media Limited | | 2008 |
| Can'T BE Arts! Ltd | Swainby | 2022 |
| Canada Square Health & Fitness Limited | London | 2003 |
| Canada Violet Ltd | London | 2021 |
| Canada Water Comedy Club Ltd | London | 2025 |
| Canal Boxing Academy Sports Hub Limited | Lisburn | 2024 |
| Canal Cafe Theatre Ltd | London | 2021 |
| Canal K Limited | London | 2014 |
| Canal Street Creative Limited | Sheffield | 2022 |
| Canal Studio Ltd | Peterborough | 2017 |
| Canal Walk Holdings Ltd | Burnley | 2026 |
| Canalrace C.I.C. | Abergavenny | 2016 |
| Canalside Community Music Space CIC | Leeds | 2021 |
| Canalside Fitness Ltd | Skipton | 2009 |
| Canan Alba Ltd. | Sleat | 1992 |
| Canary Arts 2023 Ltd | Glasgow | 2023 |
| Canary Creative Management Services Limited | London | 2011 |
| Canary House Rehearsal Rooms Ltd | London | 2025 |
| Canary Islands Performing Arts Ltd | Fleet | 2024 |
| Canary Social Club Ltd | Norwich | 2013 |
| Canary Trail Events Ltd | Wallington | 2018 |
| Canary Wharf Theatre Limited | London | 2025 |
| Canbury Boathouse Limited(The) | Kingston Upon Thames | 1964 |
| Cancer Fitness Community Interest Company | Southend-On-Sea | 2024 |
| Candi Creations Ltd | Bristol | 2012 |
| Candi Entertainment Ltd | Ramsgate | 2011 |
| Candice Bryan’S Swim School Limited | Feltham | 2024 |
| Candid Arts Trust | London | 1995 |
| Candid Limited | London | 1988 |
| Candid Studios Ltd | London | 2023 |
| Candlelight Concerts Ltd | London | 2016 |
| Candlelit Dartmouth Limited | Dartmouth | 2019 |
| Candoco Dance Company | London | 1993 |
| Candy Apple Blue Ltd | London | 2010 |
| Candy Carter Creative Limited | London | 2024 |
| Candy Competitions Ltd | Arundel | 2025 |
| Candy Fitness Ltd | High Wycombe | 2014 |
| Candy House Events & Entertainments Limited | Blackpool | 2020 |
| Candy Poppers Limited | London | 2022 |
| Candy Records Limited | Brighton | 1993 |
| Candy Rock Entertainment Ltd | Faversham | 2010 |
| Candy Yachts Limited | Poole | 2023 |
| Candykidssparty Limited | Dagenham | 2019 |
| Candyland Play Village Ltd | Birmingham | 2024 |
| Candyland Productions Ltd | London | 2021 |
| Candytan Events Limited | Dartford | 2018 |
| Candytan Mascots Ltd | Dartford | 2024 |
| Cane Productions Ltd. | London | 2017 |
| Canela Group Ltd | London | 2026 |
| Canford Cliffs Country Club Ltd | Poole | 2025 |
| Canford Magna Complex Limited | Dorset | 2001 |
| Canford Park Sports Limited | Wimborne | 1999 |
| Cangym Ltd | Accrington | 2023 |
| Canhamspence Ltd | Thames Ditton | 2020 |
| Cani-Trail Events Ltd | Bridgend | 2025 |
| Canine Aqua Centre Limited | Dunstable | 2017 |
| Canine Aqua Splash Ltd | London | 2019 |
| Canine Aquatic Leisure Ltd | Billericay | 2023 |
| Canine Handbooks Limited | Huddersfield | 2021 |
| Canine Physio Ltd | Dukinfield | 2023 |
| Canix Canine Sports Ltd | Leamington Spa | 2018 |
| Cann Creative Ltd | York | 2014 |
| Canned Soup Ltd | Ringwood | 2016 |
| Canning Coaching Ltd | Glenrothes | 2022 |
| Canning Street Yoga Ltd | Edinburgh | 2013 |
| Cannock 247 Limited | Lowestoft | 2020 |
| Cannock Chase Cycle Centre Ltd | Rugeley | 2006 |
| Cannock Chase Escape Room Ltd | Burntwood | 2018 |
| Cannock Chase Golf Club Estates Limited | Nr Stafford | 1903 |
| Cannock Chase Theatre Trust CIC | Cannock | 2025 |
| Cannock Chase Trekking Centre Limited | Stafford | 2001 |
| Cannock Dynamos Ltd | Cannock | 2025 |
| Cannock Martial Arts Centre Limited | Cannock | 2018 |
| Cannock Rugby Union Football Club Limited | Cannock | 2010 |
| Cannon Clay Shooting Club and Outdoor Activities Ltd | Birmingham | 2017 |
| Cannon Club Promotions Ltd | London | 2021 |
| Cannon Golf Company Limited | London | 2003 |
| Cannon Green Ltd | London | 2022 |
| Cannons Adventures Limited | Epsom | 1989 |
| Cannons Covent Garden Limited | Epsom | 1981 |