| Cathrina Torres Ltd | London | 2023 |
| Cathrine Dickinson Interior Design Ltd | Doncaster | 2012 |
| Cathriona Roche Hairdressing Ltd | Bromsgrove | 2012 |
| Cathy Birch Limited | Gloucester | 2022 |
| Cathy Tennant Production Ltd | London | 2019 |
| Cathy Watson Coaching Limited | Epsom | 2021 |
| Cathy's Beauty Naturals Ltd | Hamilton | 2011 |
| Cathy's Laundry Service Limited | Goodwick | 2014 |
| Cathy's Wellbeing Club Community Interest Company | Lydd | 2024 |
| Catier Beauty Station Ltd | Poole | 2025 |
| Catisfield Gate Management Company Limited | Fareham | 2002 |
| Catlip Holdings Limited | Gerrards Cross | 1958 |
| Catnip Concierge Co. Ltd. | Ripon | 2024 |
| Cato Limited | Wolverhampton | 2009 |
| Catology Feline Grooming Ltd | Waterlooville | 2023 |
| Catori Beauty Ltd | Consett | 2022 |
| Catos Auctions Limited | Liverpool | 2014 |
| Catrigg Retrievers Ltd | Settle | 2026 |
| Catrin Properties Limited | Stockport | 2014 |
| Catriona Craig Bespoke Beauty Limited | Glasgow | 2005 |
| Catriona Daley Limited | Liverpool | 2011 |
| Catronics Ltd | York | 2019 |
| Cats Cradle Tattoo Studio Limited | Rossendale | 2016 |
| Cats in the City Ltd | Canary Wharf | 2025 |
| Cats on Vacation Limited | Chippenham | 2025 |
| Cats Protection Enterprises Limited | Haywards Heath | 1994 |
| Cats Protection Trustee Limited | Haywards Heath | 2008 |
| Cats Whiskers Boarding Cattery Ltd | Hereford | 2018 |
| Cats Whiskers Hair Cardiff Limited | Cardiff | 2022 |
| Catt Gibbons Limited | Hull | 2025 |
| Cattle Hoofcare Ltd | Deeside | 2019 |
| Cattleya Thai Therapy Limited | Hayes | 2017 |
| Cattopia Ltd | Glasgow | 2024 |
| Cattows Farm Weddings Ltd | Heather | 2017 |
| Catum Consulting Ltd | London | 2016 |
| Caturti Ltd | Telford | 2020 |
| Caturyog Ltd | Telford | 2020 |
| Catwalk Beauty Academy Limited | Derby | 2018 |
| Catwalk Clinic Ltd | Wembley | 2025 |
| Caubade Ltd | London | 2022 |
| Cauda Equina Syndrome Association C.I.C. | Whalley | 2013 |
| Caught by the River Ltd | London | 2016 |
| Caukie Community Interest Company | Richmond | 2024 |
| Caulfield Coaching Limited | London | 2010 |
| Caulfield Enterprises Limited | Kelty | 2003 |
| Caurica International Ltd | Manchester | 2021 |
| Causatum Ltd | Leeds | 2014 |
| Cause (UK) Limited | London | 2011 |
| Causemite Limited | Market Harborough | 2022 |
| Causer Physiotherapy Ltd | Brentwood | 2015 |
| Causeway Alternative Fuels Limited | Belfast | 2019 |
| Causeway and MID Ulster Women's AID | Cookstown | 1995 |
| Causeway Barber Ltd | Birmingham | 2024 |
| Causeway Biochar Limited | Newry | 2021 |
| Causeway Business Exchange Ltd | Edinburgh | 2018 |
| Causeway Chamber of Commerce | Coleraine | 1920 |
| Causeway Cleaning Ltd | Coleraine | 2012 |
| Causeway Coast Aesthetics Ltd | Coleraine | 2017 |
| Causeway Coast Mini Club Limited | Portstewart | 2004 |
| Causeway Coast Vineyard Church | Coleraine | 2008 |
| Causeway Connections Limited | Coleraine | 2020 |
| Causeway Creative Ltd | Warrington | 2024 |
| Causeway Energy Limited | Newry | 2019 |
| Causeway Renewable Fuels Limited | Newry | 2023 |
| Causeway Renewables Limited | Newry | 2019 |
| Causeway Wind Limited | Belfast | 2012 |
| Causton Group Limited | Bradford | 2017 |
| CAV Systems Group Limited | Newcastle Upon Tyne | 2017 |
| CAV Systems Holdings Limited | Newcastle Upon Tyne | 2017 |
| CAV Systems Limited | Consett | 2017 |
| Cava Bien Limited | Milton Keynes | 2012 |
| Cavaletta Investment Limited | London | 2008 |
| Cavalier (Warrington) Ltd | Warrington | 2017 |
| Cavalier (Wilmslow) Ltd | Knutsford | 2017 |
| Cavalieri Limited | London | 2017 |
| Cavalleros Ltd | London | 2020 |
| Cavalor Direct Limited | Wolverhampton | 2019 |
| Cavalry Crescent Residents Company Limited | Lynch Wood | 2023 |
| Cavass Ltd | London | 2024 |
| Cavay Limited | London | 2019 |
| Cave Barber Coventry Ltd | Coventry | 2024 |
| Cave Clinic Ltd | Manchester | 2025 |
| Cave Consultancy Ltd | Bessborough Road | 2004 |
| Cave Enterprises Limited | Grimsby | 2018 |
| Cave for MEN Limited | Barnet | 2018 |
| Cave Hill Conservation Campaign | | 2008 |
| Caveco Creative Limited | Stourbridge | 2022 |
| Caved Limited | Manchester | 2021 |
| Cavehill Redbarn Ltd | Belfast | 2025 |
| Cavell DRY Cleaners Limited | London | 2016 |
| Cavell Hairdressing Ltd | Hollinwood | 2022 |
| Cavell Laundry Ltd | Wimbledon | 2018 |
| Caveman Barbers Ltd | Beverley | 2017 |
| Caveman Clinic Ltd | North Weald | 2016 |
| Caveman Grooming Ltd | London | 2026 |
| Caveman Mapperley Ltd | Nottingham | 2021 |
| Caveman Turkish Barber Ltd | Lonodn | 2025 |
| Caveman UK Barber Ltd | Nottingham | 2025 |
| Cavendish (Woking) Management Company Limited | Camberley | 1984 |
| Cavendish Cleaners Ltd | Stamford Hill | 2022 |