| Cardwell Bay Sailing Club Limited | Gourock | 2024 |
| Cardy Co Ltd | Needham Market | 2023 |
| Care & More Ltd | Leeds | 2014 |
| Care 2 Create Limited | Galashiels | 2018 |
| Care and Climate Ltd | Epsom | 2022 |
| Care Corporation Limited | | 1991 |
| Care for Youth Ltd | Harrow | 2020 |
| Care Force Wellness Ltd | Basingstoke | 2022 |
| Care Home Entertainment Limited | Boston | 2017 |
| Care in the Community Recordings Limited | London | 2008 |
| Care NOT Capital CIC | Southend-On-Sea | 2024 |
| Care to Culture CIC | London | 2021 |
| Carefit in the Community CIC | Burnley | 2026 |
| Carefully Crafted Gardens Limited | Liverpool | 2025 |
| Caren Limited | Penn | 2007 |
| Carenzi Venues Limited | Warrington | 2020 |
| Carew Cheriton Control Tower Group | Kilgetty | 2008 |
| Carey & Kevin Music Production Ltd | London | 2026 |
| Carey Armstrong Limited | London | 2024 |
| Carey Events Limited | Preston | 2025 |
| Carey-Hills & Hendricks Ltd | London | 2020 |
| Cargill's Gym Kirriemuir Ltd | Forfar | 2020 |
| Cargill's Gym Montrose Ltd | Forfar | 2025 |
| Cargo Broadcast Limited | Lancashire | 1978 |
| Cargo Fleet Football Club Ltd | Middlesbrough | 2026 |
| Cargo Promotions Limited | London | 2023 |
| Cargreen Yacht Club Limited | Landulph Saltash | 2004 |
| Caria Golf Ltd | Enfield | 2021 |
| Cariad Port Limited | London | 2021 |
| Cariad the COW Ltd | Barnet | 2024 |
| Cariad Theatre Productions Ltd | Rugby | 2025 |
| Carib Soul Limited | Leigh On Sea | 2013 |
| Caribbean Kids Heroes Ltd | London | 2023 |
| Caribbean Kids Ltd | London | 2023 |
| Caribbean Sessions Limited | London | 2019 |
| Caribbean Sports Club (Sheffield) Limited | Sheffield | 2007 |
| Carillon Music Services Ltd. | Harrow | 2013 |
| Carimakesnoise Limited | London | 2023 |
| Carin Hoff Ltd | Sheffield | 2017 |
| Caring Friends Around the World Ltd | London | 2018 |
| Caring-More Limited | Berks | 1988 |
| Carisbrooke Lawn Tennis Club Limited | | 1980 |
| Carl Baker Soccer Schools Limited | Coventry | 2020 |
| Carl Betty Martial Arts Ltd | Usk | 2021 |
| Carl Bianco Limited | Addlestone | 2007 |
| Carl Boardley Motorsport Limited | Ipswich | 2012 |
| Carl Braganza Limited | London | 2006 |
| Carl Burnett Design Ltd. | Sutton Coldfield | 2011 |
| Carl COX Racing WFG Ltd | Abingdon | 2023 |
| Carl Cross Golf Limited | Buxton | 2015 |
| Carl Harms Limited | London | 2015 |
| Carl Jackson Martial Arts Limited | Bristol | 2022 |
| Carl John Spencer Limited | Alcester | 2012 |
| Carl Kendall-Palmer Limited | London | 2000 |
| Carl Llewellyn Business & Leisure Limited | Stow On The Wold | 2000 |
| Carl Lyons Studio Ltd | Camberley | 2006 |
| Carl MAN Ltd | Droitwich | 2026 |
| Carl Mason , Carlosm Limited | Mold | 2024 |
| Carl Mitchell Motorsport Limited | Sunbury-On-Thames | 2024 |
| Carl Payne Limited | Stoke On Trent | 2008 |
| Carl Piergianni Performance Limited | Stamford | 2025 |
| Carl Rosa Productions Limited | Shoreditch | 1993 |
| Carl Rosa Trust Limited | Pulborough | 1953 |
| Carl's Boxing Stable CIC | Plymouth | 2023 |
| Carl's Personal Training Services Limited | Leeds | 2002 |
| Carla's Curiosities Ltd | Sutton | 2019 |
| Carley Comps Ltd | Manchester | 2024 |
| Carlight Heritage Ltd | Sleaford | 2016 |
| Carlin Management Services Ltd | Alresford | 2013 |
| Carling Barn Collective | Bristol | 2023 |
| Carlingford Lough Yacht Club Limited | Newry | 2014 |
| Carlisle Golf Club Limited | Carlisle | 2016 |
| Carlisle Green Room Club Limited | Carlisle | 1979 |
| Carlisle Hockey Club | Carlisle | 2022 |
| Carlisle Rugby Football Club Limited | Carlisle | 2010 |
| Carlisle Squash and Racketball Club Limited | Carlisle | 2019 |
| Carlisle TAE Kwon DO Limited | Carlisle | 2006 |
| Carlisle United Association Football Club (1921) Limited | Carlisle | 1921 |
| Carlisle United FC Community Sports Trust | Carlisle | 2008 |
| Carlisle Villa Amateur Boxing Club | Carlisle | 2010 |
| Carlisle Xtreme Sports Limited | Carlisle | 2003 |
| Carlo Ghini Ltd | Pevensey | 2011 |
| Carlo's Miniatures Ltd | Richmond | 2021 |
| Carlos Caldera Creative Limited | Cardiff | 2026 |
| Carlos Method Fitness Ltd | Norwich | 2023 |
| Carlosonthebeat Ltd | London | 2025 |
| Carlotte Wubben-Moy Limited | Tring | 2021 |
| Carlson Brand Ltd | | 2004 |
| Carlson Gracie Ashford Acadamy Ltd | Ashford | 2016 |
| Carlson Gracie Camberley Limited | Bournemouth | 2013 |
| Carlson Gracie Hull Limited | London | 2021 |
| Carlstrom Buckie Film Services UK Ltd | Reading | 2023 |
| Carlton Bridge Club Limited | Edinburgh | 1937 |
| Carlton Clubs Limited | Inverness | 1990 |
| Carlton Cricket Club, Limited | Edinburgh | 1925 |
| Carlton Entertainment Ltd | Doncaster | 2023 |
| Carlton Superior Fitness Gym Limited | Doncaster | 2022 |
| Carltonbingo.Com Limited | Inverness | 2006 |
| Carly Imrie Performing Arts Ltd | Kirkcaldy | 2024 |
| Carly Productions Ltd | London | 2016 |