| Carewell Connect Ltd | London | 2025 |
| Carewell Support Services Ltd | London | 2016 |
| Carewise Solutions Ltd | Derby | 2024 |
| Careworld Enterprises Limited | Ilford | 2022 |
| Carexamer Ltd | London | 2017 |
| Carey Hughes Limited | Glasgow | 2017 |
| Carey's Appliance Repairs Ltd | Ipswich | 2022 |
| Carey's Garden Secrets Limited | Bexleyheath | 2015 |
| Carfanz Ltd | Oakham | 2023 |
| Carfar Ltd Limited | Upminster | 2021 |
| Carfin Barbers Ltd | Holytown | 2025 |
| Carfin Hair Studio Ltd | Carfin | 2025 |
| Carforyou Limited | Cambridge | 2015 |
| Carftyhaven Ltd | London | 2025 |
| Cargate Limited | Essex | 2025 |
| Cargo & Commodities UK Ltd | London | 2022 |
| Cargo Bike Care Ltd | London | 2025 |
| Cargo Incident Notification System Limited | Epsom | 2014 |
| Cargo Shop Limited | London | 2019 |
| Cargoflight Ltd | Milton Keynes | 2023 |
| Cargurus UK Limited | Altrincham | 2016 |
| Carham Estates Limited | Hinckley | 1988 |
| Caria Limited | Enfield | 2022 |
| Cariad Associates Ltd | Ware | 2011 |
| Cariad Creative Studio Ltd | Barry | 2017 |
| Cariad Dating Ltd | Newport | 2018 |
| Cariad Fudge Limited | London | 2023 |
| Cariad Laundry Ltd | Newcastle Emlyn | 2025 |
| Cariad Marketing Ltd | Ware | 2009 |
| Cariadpaws Ltd | London | 2026 |
| Carib Nation Ltd | London | 2024 |
| Caribbean and Organization of American States African Diaspora Affairs Ltd | Cardiff | 2021 |
| Caribbean Biodiversity Fund | Altrincham | 2012 |
| Caribbean Diaspora Skills Directory CIC | Croydon | 2018 |
| Caribbean Glow Ltd | Ruislip | 2020 |
| Caribbean Imports Ltd | London | 2025 |
| Caribbean Kissed Tanning Studio Ltd | Meopham | 2025 |
| Caribbean Music Association | Wembley | 2012 |
| Caribbean Paradise Ltd | Bradford | 2026 |
| Caribbean Sun Limited | Manchester | 2026 |
| Caribbean Tourism Organisation UK and Europe | Haywards Heath | 2001 |
| Caribbean Voices for Labour CIC | London | 2024 |
| Caribonum Pension Trustees Limited | London | 1979 |
| Caribou Entertainment Ltd | London | 2016 |
| Caribou Glasson Dock Management Limited | Lancaster | 2001 |
| Caribou Hair Ltd | Par | 2019 |
| Caridon Eco Ltd | London | 2021 |
| Carifroo Limited | London | 2021 |
| Carillion Fleet Management Limited | Leeds | 1954 |
| Carillion Integrated Services Limited | Leeds | 1998 |
| Carillon Industrial Services Limited | Bedford | 1980 |
| Carina CJ Services Limited | Liverpool | 2013 |
| Carina Webshop Ltd | London | 2025 |
| Carina’S Village Paws Ltd | Shaftesbury | 2025 |
| Carine Yacht Services Limited | Wimborne | 2018 |
| Carine Yachts Limited | Cardiff | 2009 |
| Caring 4 Canines Ltd | Horley | 2017 |
| Caring Community Limited | Telford | 2017 |
| Caring Creations Leicestershire Ltd | Leicester | 2022 |
| Caring Cremations Ltd | Westcliff-On-Sea | 2018 |
| Caring for Kids Limited | Barnet | 2006 |
| Caring Hands and Nursing Services Limited | Chatham | 2019 |
| Caring Hands SW Ltd | Paulton | 2025 |
| Caring IZ Sharing Ltd | Cambridge | 2017 |
| Caring Ladies Funeral Directors Limited | Portsmouth | 1995 |
| Caring Lady Funeral Directors Limited | Portsmouth | 2012 |
| Caring Made Simple Ltd | Nottingham | 2016 |
| Caring Ministries | Belfast | 2013 |
| Caring Thoughts Ltd | Birmingham | 2015 |
| Caring Without Borders CIC | Belfast | 2022 |
| Caring, Professional, Reliable Healthcare Limited | Glasgow | 2018 |
| Caringa Ltd | Harrow | 2017 |
| Carini Limited | | 2006 |
| Carisbrooke Marine Ltd | Exeter | 2017 |
| Carisbrooke Mews Management Company Limited | Northampton | 1996 |
| Carisbrooke Priory Trust Company Limited | Newport | 2008 |
| Carisma Services | Manchester | 2019 |
| Carismo Ltd | London | 2025 |
| Carita Express Limited | Wokingham | 2018 |
| Caritas Diocese of Plymouth | Newton Abbot | 2023 |
| Caritas Home Care Ltd | London | 2020 |
| Caritas HR Ltd. | London | 2021 |
| Caritas Ltd | London | 2024 |
| Caritipo Ltd | Stourport-On-Severn | 2015 |
| Caritra Ltd | Telford | 2020 |
| Cariva Care Limited | Bedford | 2025 |
| Carivol Limited | Lowestoft | 2018 |
| Carki Ltd | London | 2021 |
| Carl & David Ltd | London | 2025 |
| Carl Bembridge Hair Ltd | Bristol | 2021 |
| Carl Boswell Ltd | Kidlington | 2014 |
| Carl Campbell Salons Limited | London | 2017 |
| Carl Chapman (Bury) Limited | Manchester | 2020 |
| Carl Flavell Limited | Birmingham | 2024 |
| Carl Hillwood Hairdressing Limited | Fordingbridge | 2011 |
| Carl Hogg & Susan Fields Funeral Service Ltd | Golborne | 2017 |
| Carl IAN Williams Ltd | Barnsley | 2015 |
| Carl Keith Salons Limited | Burnley | 1999 |
| Carl Marshall Public Relations Limited | London | 2019 |
| Carl Molloy Limited | Derby | 2003 |