| Campix UK Ltd | Loughborough | 2026 |
| Camplas Technology Ltd. | Pen-Y-Fai | 1978 |
| Camplins Cakes Ltd | Brixham | 2024 |
| Camps Transport Limited | Port Talbot | 2015 |
| Campsie Coachworks Limited | Lennoxtown | 2025 |
| Campsie Holdings Ltd | Glasgow | 2023 |
| Campsie Technical Engineering Ltd | Londonderry | 2024 |
| Campus Screenprint Limited | Hinckley | 2013 |
| Camputel Limited | Colchester | 1999 |
| Campwood Press Ltd | Clacton-On-Sea | 2013 |
| Camro Aviation Limited | Manchester | 2025 |
| Camryn Designs Limited | Wadebridge | 1999 |
| Cams Coffee Go Limited | London | 2025 |
| Cams Joinery Ltd | Hamilton | 2016 |
| Camscentre Limited | London | 2016 |
| Camshaft Limited | Bristol | 2004 |
| Camsparks Limited | Bury St. Edmunds | 2017 |
| Camstar Herbs Limited | Eye | 1979 |
| Camstar Ingredients Limited | Eye | 2011 |
| Camsterdam Ltd | Enfield | 2022 |
| Camtec Design (Redditch) Limited | Worcs | 1981 |
| Camtec Engineering Limited | Plympton Plymouth | 2000 |
| Camtech Services Limited | Leven | 2023 |
| Camtech SSL Limited | Liverpool | 2014 |
| Camtex Fabrics Limited | Carlisle | 1958 |
| Camtronics Limited | Tredegar | 2003 |
| Camturn Limited | Tewkesbury | 1996 |
| Camulos Kitchens Ltd | Colchester | 2024 |
| Camvac International Ltd | Thetford | 2023 |
| Camvac Rockwell Limited | Dundee | 1997 |
| Camvale Ltd | Tunbridge Wells | 2019 |
| Camvention Limited | Farnborough | 2022 |
| Camvolt Ltd | London | 2024 |
| Camwheat PIE Machine Company Limited | West Yorkshire | 1998 |
| Camworq Ltd | Letchworth Garden City | 2016 |
| Camy Cleaning, Ironing &Tailoring Alterations Ltd | Carlisle | 2021 |
| CAN and Will Ltd | Coalville | 2025 |
| CAN CAN Services Ltd | Southampton | 2025 |
| CAN Closure Sales Limited | Malvern | 1999 |
| CAN DO Candles Ltd | London | 2026 |
| CAN Electrical Repair and Maintenance Ltd | Enfield | 2020 |
| CAN Electronics Ltd | London | 2021 |
| CAN Fabrication and Fencing Services Ltd | Birstall | 2016 |
| CAN Handling Systems Ltd | Westhoughton | 2024 |
| CAN of GAS Ltd | London | 2024 |
| CAN Official Ltd | London | 2019 |
| CAN Spares and Consumables Limited | Paisley | 2016 |
| CAN West Services Limited | Bristol | 2013 |
| Can'T Stop, Won'T Stop. Ltd | London | 2025 |
| Can-Am Chains( Europe) Ltd | Newcastle Upon Tyne | 2006 |
| Can-Phantom Limited | Royal Leamington Spa | 2020 |
| Can-Tech Elastomers Ltd | Londonderry | 2011 |
| Canaan Carbides Limited | Worcestershire | 1976 |
| Canac UK Ltd | | 2006 |
| Canaccess Limited | Edinburgh | 2023 |
| Canada Ampton Horticultural Technology Co., Ltd | London | 2025 |
| Canada Gasdor Chemical Group Co., Ltd | London | 2024 |
| Canada Greylong Chemical Group Co., Ltd | Fifth Floor | 2025 |
| Canada Haister Chemical Group Co., Ltd | London | 2024 |
| Canada Kelvor Agricultural Development Co., Ltd | London | 2025 |
| Canada Maxin Chemical Co., Ltd. | London | 2026 |
| Canadian Bacon Ltd | London | 2016 |
| Canadian Solar Sses (UK) Ltd | London | 2019 |
| Canadian Solar UK Operation and Maintenance Limited | London | 2016 |
| Canadian-Led UK Ltd | London | 2026 |
| Canairy Limited | Cambridge | 2021 |
| Canal Craft Ltd | Derby | 2007 |
| Canal Cruising Company Limited | Stone | 1948 |
| Canal Engineering Limited | Leeds | 2001 |
| Canal Finishing Company Limited | Birstall Batley | 1959 |
| Canal NTM Limited | Loughborough | 2023 |
| Canape Box Limited | Maidenhead | 2012 |
| Canapes Direct Limited | Perivale, Greenford | 1998 |
| Canapesandmore Ltd | Gravesend | 2024 |
| Canapeshka Ltd | Trowbridge | 2025 |
| Canapoy Limited | Birmingham | 2025 |
| Canard London Ltd | London | 2025 |
| Canary Care Global Limited | Eastleigh | 2018 |
| Canary Designs Ltd | Denbigh | 2011 |
| Canary Mobility Ltd | London | 2026 |
| Canary Wharf Space Innovation Hub Ltd | London | 2025 |
| Canarycliff Limited | Brighton And Hove | 1993 |
| Canatec Ltd | North Shields | 2015 |
| Canatrice Limited | Tyne & Wear | 1975 |
| Canatronics Automation (Global) Ltd | Chorley | 2018 |
| Canatronics Automation Ltd | Chorley | 2019 |
| Canatronics International Ltd | Chorley | 2017 |
| Canatronics Ltd | Chorley | 2017 |
| Canatronics Scientific Ltd | London | 2023 |
| Canavan Clockmakers Ltd | Lurgan | 2011 |
| Canavape Ltd | Redditch | 2024 |
| Canavart Ltd | London | 2020 |
| Canax Ltd | Nottingham | 2020 |
| Canbo Limited | London | 2026 |
| Cancanco. Ltd | Chichester | 2019 |
| Cancarp Limited | Salford | 1982 |
| Canceld Ltd | London | 2022 |
| Cancha Ltd | London | 2018 |
| Cand&So Ltd | London | 2023 |
| Candabulous Limited | London | 2019 |