| CLOUD9LIFE Thai Massage Limited | Bexleyheath | 2020 |
| Cloudbar Ltd | Leeds | 2026 |
| Cloudbase Consulting Ltd | Worcester | 2010 |
| Cloudcrazy Ltd | Canterbury | 2017 |
| Cloude 9 Customs Limited | New Romney | 2020 |
| Clouded Domain and Web Services Ltd | Doncaster | 2009 |
| Clouded Web Hosting Ltd | Doncaster | 2009 |
| Cloudfit Enterprise Limited | Sutton | 2022 |
| Cloudmaker Limited | Hildenborough | 2025 |
| Cloudmaker Whisky Limited | Hildenborough | 2025 |
| CLOUDNINESTUDIO2025 Limited | Leigh | 2025 |
| Cloudovation Services Limited | London | 2018 |
| Cloudphase Consultancy Limited | Orpington | 2011 |
| Cloudrev Ltd | Brentford | 2014 |
| Clouds One Services Ltd | Manchester | 2016 |
| Cloudscale Limited | Kent | 1984 |
| Cloudscapes Design Limited | London | 1996 |
| Cloudtail Retail Ltd | Glasgow | 2019 |
| Cloudtng Limited | London | 2021 |
| CLOUDTOUCH360 Ltd | Bromley | 2024 |
| Cloudy Bird Ltd | London | 2014 |
| Clough & Co Ltd | Ruthin | 2025 |
| Clough Promotions Limited | Derby | 1980 |
| Cloughorr Management Company Limited | Portrush | 2007 |
| Cloughshaw Limited | London | 2022 |
| Clout Model Management Ltd | Redditch | 2020 |
| Clouter Services Limited | Kent | 1997 |
| Clova Kirk Trust | Edinburgh | 2004 |
| Clova Renewables Limited | Forfar | 2015 |
| Clove Beauty UK LAB Ltd | Manchester | 2025 |
| Clove&Co Ltd | Stoke-On-Trent | 2020 |
| Clovelly Path Limited | Lincoln | 2023 |
| Clover 288 Ltd | Sheffield | 2025 |
| Clover Nails Ltd | Beckenham | 2025 |
| Clover Planco Ltd | London | 2025 |
| Cloverfield Cattery Limited | Sale | 2025 |
| Cloverhill Therapies Limited | Strathaven | 2011 |
| Cloverlay Limited | Worcester | 2021 |
| Cloverleaf Advisory Ltd | Norwich | 2020 |
| Cloverleaf Car Services Limited | Mitcheldean | 2005 |
| Cloverleaf Consulting Limited | Stourbridge | 2010 |
| Cloverleaf HC Ltd | Northumberland | 2004 |
| Cloverley Care Limited | Nr Whitchurch | 2016 |
| Clovermore Events Ltd | Nottingham | 2025 |
| Clovervoice Limited | Hayes | 2015 |
| Clovez Ltd | Rotherham | 2017 |
| CLOWD9 Ltd | High Wycombe | 2019 |
| Clowdr UK Limited | London | 2023 |
| Clowns Children's Centre (Ironville) Limited | Derby | 2002 |
| Clowns Children's Centres Limited | Derby | 2002 |
| Clowns Nursery Care Limited | London | 1996 |
| Clo’S Cosmetics Ltd | Winsford | 2024 |
| CLP Designs Ltd | Liverpool | 2010 |
| CLP Developments Limited | London | 2002 |
| Clpcompany Limited | West Bromwich | 2020 |
| Clph Ltd | London | 2015 |
| CLR Engineering Technical Services (UK) Ltd | Carluke | 2018 |
| CLR Ltd | Westerham | 2019 |
| CLS Aesthetics Ltd | Colchester | 2022 |
| CLS Barbers Ltd | Kirkcaldy | 2022 |
| CLS Coastline Scaffolding Limited | Basildon | 2024 |
| CLS Concerts Limited | London | 2007 |
| CLS Hair Studio Limited | Sale | 2021 |
| CLS Networks Ltd | Emsworth | 2019 |
| CLS Services (U.K) Limited | Basildon | 2014 |
| CLS Stylists Ltd | Glasgow | 2019 |
| CLS Workwear Limited | Settle | 2015 |
| Clsa Events Ltd | Hove | 2004 |
| CLT Enviro-Law Ltd | Henfield | 2008 |
| CLT Recruitment Ltd | London | 2021 |
| Cltl Ltd | Westcliff-On-Sea | 2020 |
| CLU Consultancy Ltd | Poulton-Le-Fylde | 2019 |
| Club 10 Ltd | Stanmore | 2021 |
| Club 1872 Limited | Glasgow | 2016 |
| Club 1872 Shares Community Interest Company | Glasgow | 2014 |
| Club 1896 Ltd | Belfast | 2023 |
| Club 1990. Ltd | Keighley | 2021 |
| Club 22 Ltd | Newton Aycliffe | 2025 |
| Club 8 Barber Ltd | Esher | 2020 |
| Club 99 Barbering Ltd | Kettering | 2025 |
| Club 99 Limited | Kettering | 2020 |
| Club 99 Men's Health Ltd | Wellingborough | 2016 |
| Club Aesthetics Ltd | Bristol | 2023 |
| Club Alfa UK Ltd | Bradford | 2019 |
| Club Barber (Grimsby) Limited | Grimsby | 2023 |
| Club Barber Limited | Grimsby | 2019 |
| Club Beauté Ltd | Lee-On-The-Solent | 2025 |
| Club Boys Barber Ltd | Bolton | 2025 |
| Club Boyss Limited | Chorley | 2026 |
| Club Buddie Limited | Guisborough | 2012 |
| Club Buddy Limited | Guisborough | 2012 |
| Club Business Ltd | St Albans | 2025 |
| Club Coco Ltd | Prestwick | 2021 |
| Club Coins UK Ltd | Winsford | 2015 |
| Club Community Partnership Limited | Spennymoor | 2021 |
| Club Connect App Ltd | Cardiff | 2025 |
| Club Connect GG Limited | Barnsley | 2025 |
| Club Culture Brighton Ltd | Brighton | 2017 |
| Club CUT Ltd | Bristol | 2025 |
| Club DES Sports Ltd | London | 2017 |