| Cloud Robot Ltd | Borehamwood | 2026 |
| Cloud Sports Management UK Ltd | Brighton | 2017 |
| Cloud Strider Equestrian Limited | Tattenhall | 2016 |
| Cloud Studios TWB Ltd | Abingdon | 2026 |
| CLOUD9 Comedy Ltd | London | 2023 |
| CLOUD9 Pursuits Ltd | Reading | 2014 |
| Cloudbase Airsports Limited | Hook | 2019 |
| Cloudbase Trading Ltd | Hook | 2009 |
| Cloudburst Productions Ltd | Alderley Edge | 2023 |
| Clouded Productions Ltd | London | 2021 |
| Cloudlike Studio Ltd | Edgware | 2021 |
| Cloudpeak Performance Limited | Loughborough | 2025 |
| Cloudroot Limited | London | 2023 |
| Clouds Makeup Limited | Mayford | 2022 |
| Cloudside Outdoor Pursuits Limited | Oldham | 1989 |
| Cloud’S Studio Ltd | Manchester | 2024 |
| Clough Old School Ltd | Downpatrick | 2012 |
| Clout Combat League Ltd | Stoke On Trent | 2026 |
| Clout Gyms Ltd | Mitcham | 2025 |
| Clout SG Ltd | Kington | 2025 |
| Clove Press Limited | London | 2020 |
| Clovelly Holiday Park Limited | Hemel Hempstead | 2025 |
| Clover FOX Films Ltd | London | 2023 |
| Clover Machines Limited | London | 2017 |
| Clover Raffles Ltd | London | 2025 |
| Clover Sports Management Ltd | Billingham | 2019 |
| Clover Stroud Limited | Bicester | 2009 |
| Cloverhill GC Ltd | Newry | 2026 |
| Clown About Salisbury Limited | Salisbury | 1997 |
| Clown Around Club Ltd | Edinburgh | 2018 |
| Clown LAB LDN CIC | London | 2025 |
| Clown Space CIC | York | 2024 |
| Clowns and Diamonds Ltd | London | 2023 |
| CLR Dance Ltd | Gloucester | 2013 |
| CLR School of Dance CIC | Gloucester | 2017 |
| CLS Entertainment Ltd | Manchester | 2023 |
| CLS Ideas Limited | London | 2024 |
| CLS Limited | Aberdeen | 2001 |
| CLS Live Limited | London | 2019 |
| CLS Productions Limited | London | 2014 |
| CLS Studio Limited | Pontefract | 2025 |
| CLS Touring Ltd | Manchester | 2025 |
| Clsht Ltd | London | 2017 |
| Clsod Limited | Fair Oak | 2020 |
| Clsouth Limited | Lincoln | 2023 |
| Club 100 Health Clubs Ltd | Harleston | 2019 |
| Club 100 International Limited | Broadstairs | 2023 |
| Club 100 Racing Limited | Broadstairs | 1999 |
| Club 1000 Limited | Grimsby | 2018 |
| Club 13 Fitness Ltd | Ramsgate | 2026 |
| Club 147 Snooker Hall Ltd | Nelson | 2026 |
| Club 15 Ltd | London | 2025 |
| Club 1872 Projects Community Interest Company | Glasgow | 2013 |
| Club 2000 Bingo Limited | Bedford | 2005 |
| Club 21 GEA Limited | Grays | 2024 |
| Club 223 Ltd | Melton Mowbray | 2025 |
| Club 300 Limited | Perth | 2020 |
| Club 400 Ltd | Sheffield | 2025 |
| Club 50 Padel Ltd | Treharris | 2026 |
| Club 85 CIC | Hitchin | 2026 |
| Club Aixo Pentwyn Ltd | Cardiff | 2025 |
| Club and Racket Ltd | Fareham | 2025 |
| Club Atlético Manchester Ltd | Salford | 2025 |
| Club BAD Limited | Plymouth | 2018 |
| Club Bounce Mania Ltd | Birmingham | 2022 |
| Club Carib Limited | West Bromwich | 2001 |
| Club Celeste Ltd | Worcester | 2019 |
| Club Class Golf Repairs Limited | West Midlands | 2003 |
| Club CM1 Ltd | London | 2023 |
| Club Comps Ltd | Edinburgh | 2021 |
| Club Condor Ltd | London | 2024 |
| Club Cricket Conference Limited | Bucks | 2013 |
| Club Culture Events Ltd | Musselburgh | 2023 |
| Club DE Padel (Cannon) Limited | Manchester | 2024 |
| Club DE Padel (MF) Limited | Manchester | 2026 |
| Club DE Padel (WR) Limited | Manchester | 2025 |
| Club DE Padel Limited | Manchester | 2023 |
| Club DE Padel Topco Limited | Manchester | 2023 |
| Club DE Pickle Limited | London | 2025 |
| Club Development Solutions Ltd | Glasgow | 2024 |
| Club Doncaster Community Sports & Education Foundation | Doncaster | 2007 |
| Club Doncaster Limited | Doncaster | 2013 |
| Club Eclectique Limited | London | 2016 |
| Club Edge Limited | Romford | 2025 |
| Club EIGHT3 Ltd | London | 2026 |
| Club Ekta CIC | Leeds | 2022 |
| Club Elite Mark 14 Limited | Southminster | 2005 |
| Club Energy (Omagh) Ltd | Omagh | 2013 |
| Club Energy (Retford) Limited | Keighley | 2018 |
| Club Energy Limited | Otley | 2002 |
| Club Equestrian Limited | Leyland | 2009 |
| Club Esports Limited | Leeds | 2025 |
| Club Excel Leisure Limited | Borehamwood | 2010 |
| Club Fiit Ltd | Watford | 2022 |
| Club Five Ltd | Hereford | 2021 |
| Club Flamma Ltd | Coulsdon | 2025 |
| Club Flexx Ltd | Brentwood | 2026 |
| Club for ALL Ltd | Peterborough | 2015 |
| Club Gaming Limited | Chandler'S Ford | 2023 |
| Club GT Ltd | London | 2006 |