| Catherine Goodman Studios Ltd | London | 2024 |
| Catherine Kearney Coaching Ltd | Merseyside, Liverpool | 2023 |
| Catherine Legg Hair and Makeup Ltd | London | 2022 |
| Catherine Oconnor Fitness Coach Ltd | Merseyside, Liverpool | 2020 |
| Catherine Price Art Limited | Buckhurst Hill | 2026 |
| Catherine Steadman Limited | London | 2014 |
| Catherine Tregenna Ltd | Llanelli | 2007 |
| Catherine Unger Limited | London | 2020 |
| Catherine Wheels Theatre Company Limited | East Linton | 2000 |
| Catherine's Place Ltd | Harrogate | 2025 |
| Catherine-Rose Brooks Designs Ltd | St. Leonards-On-Sea | 2017 |
| Cathouse Productions Limited | Glasgow | 2015 |
| Cathryn Avison Limited | Near Horsham | 2003 |
| Cathy Comedy Ltd | London | 2026 |
| Cathy Reads Books Limited | Falmouth | 2016 |
| Cathy Thomo Limited | London | 2009 |
| Cathy Waller Company Ltd | London | 2021 |
| Cathy Wilkes Limited | Hamilton | 2013 |
| Catiemiller.Co Limited | London | 2022 |
| Catleaps GC Limited | Colchester | 2011 |
| Catlin Estates Limited | York | 1996 |
| Catling Creative Limited | Hampshire | 2006 |
| Catman Boogie Media Limited | Brentwood | 2015 |
| Catmompop Ltd | Basildon | 2024 |
| Cato Music Limited | Pontefract | 2001 |
| Cato Productions Limited | Acton | 1998 |
| Caton Gala Limited | Lancaster | 2008 |
| Catrin Lloyd Creative Ltd | Tregaron | 2025 |
| Cats ARE NOT Peas Ltd | Leicester | 2017 |
| Cats OUT Media Limited | London | 2018 |
| Cats Protection Care Lottery Limited | Haywards Heath | 2019 |
| Cats Protection Strategies for Cats Limited | Haywards Heath | 2019 |
| Cats Pyjamas Productions Ltd | Wakefield | 2011 |
| Catsarts & Admin Ltd | London | 2026 |
| Catskills Records Limited | Hove | 1999 |
| Catslab Ltd | Stoke-On-Trent | 2025 |
| Catsmith Studios Ltd | Chelmsford | 2024 |
| Catstudios Ltd | Leicester | 2024 |
| Catterick Golf Club 2023 Ltd | Catterick Garrison | 2023 |
| Catterick Racecourse Company Limited(The) | Richmond | 1923 |
| Catterns Limited | Edinburgh | 2022 |
| Cattle Brands Ltd | Orpington | 2016 |
| Cattle Dog Crossfit Ltd | Northampton | 2017 |
| Cattle Productions Ltd | Shrewsbury | 2011 |
| Cattledog Limited | Chichester | 2016 |
| Cattleskate Academy CIC | Banff | 2023 |
| Catton Hall Shooting Ground Ltd | Cheshire | 2007 |
| Catton Park Trust Ltd | Norwich | 2004 |
| Catufa UK CIC | London | 2024 |
| Catum Sports Limited | London | 2017 |
| Catwalk Enterprises Limited | Stockport | 2025 |
| Cauldron Sculpture Ltd | Kington | 2025 |
| Cauldwell Leisure Limited | Bournemouth | 2004 |
| Causality Health Ltd | Nottingham | 2025 |
| Cause 4 Children Limited | London | 2015 |
| Causeway 1ST AID & Training Ltd | Coleraine | 2013 |
| Causeway Adventures Limited | Coleraine | 2016 |
| Causeway Association of Urban Sports | Coleraine | 2024 |
| Causeway Coast Combat Academy CIC | Coleraine | 2021 |
| Causeway Coast Marathon Ltd | Newry | 2017 |
| Causeway Coast Maritime Heritage Ltd. | Ballycastle | 2020 |
| Causeway Coasteering Ltd | Portrush | 2021 |
| Causeway Fitness Limited | Coleraine | 2020 |
| Caustic Network Ltd | Gillingham | 2013 |
| CAV X Ltd | Winchcombe | 2021 |
| Cavaday Coaching Limited | Leicester | 2023 |
| Cavalcade of Costume Limited | Blandford Forum | 1995 |
| Cavalla Design Ltd | Wellingborough | 2025 |
| Cavalry Tattoo Studio Ltd | Norwich | 2018 |
| Cavan Kennels Ltd | London | 2018 |
| Cavanakeeran Community Association | Pomeroy | 2015 |
| Cavanmead Limited | London | 1976 |
| Cavann Sports Limited | Sheffield | 2024 |
| Cavat Theatre Arts | London | 2012 |
| Cave Diving Group Northern Section Limited | Leicester | 2024 |
| Cave Escape Nottingham Limited | Nottingham | 2017 |
| Cave Gym Corby Ltd | Market Harboro | 2020 |
| Cave Music Ltd | London | 2018 |
| Cave Nutrition Ltd | Market Harborough | 2023 |
| Caveatlector Ltd | Bromsgrove | 2013 |
| Cavefit Ltd | London | 2014 |
| Cavefit Wellness Limited | Glasgow | 2025 |
| Cavehill Bowling and Lawn Tennis Club, Limited | | 1912 |
| Caveman Athletic Ltd | Stockport | 2025 |
| Caveman Battle Doom Ltd | London | 2026 |
| Caveman Conditioning Limited | Bedford | 2017 |
| Caveman Training Limited | Stoke-On-Trent | 2013 |
| Cavemen Limited | Sheffield | 2002 |
| Cavendish Design & Advertising Limited | Rugeley | 1970 |
| Cavendish Golf Club Limited(The) | Buxton | 1954 |
| Cavendish Grey Ltd | Enfield | 2011 |
| Cavendish Hale Ltd | Beverley | 2019 |
| Cavendish Investments SDR Ltd | Brighton | 2020 |
| Cavendish Productions Ltd | London | 2023 |
| Cavendish Sporting Events Limited | Woking | 2008 |
| Cavendish Touring Services Limited | London | 2020 |
| Cavenham Village Green Ltd | Bury St. Edmunds | 2004 |
| Cavern City Tours Limited | Liverpool | 1983 |
| Cavern Music & Arts Collective C.I.C. | Exeter | 2017 |
| Caversham Association Football Club CIC | London | 2022 |