| Cadair Idris Limited | Huntingdon | 2009 |
| Cadair Limited | Edinburgh | 2001 |
| Cadantis Forensics Limited | Redditch | 2017 |
| Cadastra Group Limited | Bishop'S Stortford | 2001 |
| Cadcentre Limited | Cambridge | 2001 |
| Cadddan Estates Ltd | Birmingham | 2022 |
| Caddick (AVH Developments) Limited | West Yorkshire | 1999 |
| Caddick (Fife Road) Limited | Wetherby | 2014 |
| Caddick (Hove) Limited | West Yorkshire | 1991 |
| Caddick (Knottingley) Limited | Wetherby | 2006 |
| Caddick (Rose Wharf) Limited | West Yorkshire | 1997 |
| Caddington Golf Course Construction Ltd | Watford | 2025 |
| Caddy Group Ltd | Aylesford | 2018 |
| Caddy Trailers Limited | Preston | 2018 |
| Cadefray Limited | Bridgend | 2023 |
| Cadeleigh Nominee Limited | Tiverton | 2003 |
| Cademy Limited | London | 2024 |
| Caden Ltd | Redditch | 2010 |
| Cadentiq Ltd | London | 2026 |
| Cadeshaw Limited | Bridgend | 2023 |
| Cadet KIT Shop Limited | Coventry | 2009 |
| Cadet Vocational College Limited | Camberley | 2023 |
| Cadify Limited | Chester | 2009 |
| Cadman Investments Inc Ltd | London | 2020 |
| Cadmon Intellectual Property Co., Ltd. | Cardiff | 2019 |
| Cadmus Products International Limited | Chelmsford | 2022 |
| Cado Limited | Portadown | 1995 |
| Cadoff International Ltd | Leyland | 2024 |
| Cadogan Capital Partners Ltd | London | 2020 |
| Cadogan Construction Ltd | Bristol | 2024 |
| Cadogan Healthcare Limited | Belfast | 2026 |
| Cadogan Petroleum Limited | London | 2022 |
| Cadogan Place Settled Estates Limited | London | 2024 |
| Cadogan Settled Estates Shareholding Company Limited | London | 1941 |
| Cadogan SF Holdings Ltd | London | 2018 |
| Cadoux-Hudson Holdings Limited | Romsey | 2025 |
| Cadram Limited | Sittingbourne | 2015 |
| Cadrecruit Ltd | Basingstoke | 2002 |
| Caduce Limited | Cheltenham | 1998 |
| Cadvice Limited | Glossop | 2014 |
| Cadw Conservation Limited | Bridgend | 2003 |
| Cadwell Services Limited | Belper | 2022 |
| CAE Assets Limited | Hemel Hempstead | 2005 |
| CAE Bearings Co., Ltd | London | 2014 |
| CAE Developments Limited | Carmarthen | 2010 |
| Caeapps Ltd | Chester | 2019 |
| Caelen Bridge Ltd | Bury St. Edmunds | 2025 |
| Caelus Ltd | London | 2016 |
| Caerleon Child Care Limited | Bristol | 1997 |
| Caernarvon Close 1966 Limited | Stevenage | 2014 |
| Caerphilly Blenders Limited | Caerphilly | 2005 |
| Caerus Commercial Limited | London | 2017 |
| Caerus Consultants Ltd | London | 2015 |
| Caerus Corporate Finance Ltd | Banbury | 2013 |
| Caerus Initiative Ltd | Ashford | 2013 |
| Caerus London Limited | London | 2014 |
| Caesar (UK) Limited | Frodsham | 2012 |
| Caesarea Ltd | London | 2022 |
| Caesarean Birth Limited | Birmingham | 2011 |
| Caesius Ltd | Leicester | 2016 |
| CAF Pension Scheme Trustees Limited | West Malling | 2015 |
| Cafe 1901 Ltd | Newcastle Upon Tyne | 2014 |
| Cafe Coco Limited | Witney | 2005 |
| Cafe Cosmo Limited | Leicester | 2012 |
| Cafe DE Lisboa Ltd | Petworth | 2022 |
| Cafe Express Ltd | Doncaster | 2015 |
| Cafe Galtsjon Limited | London | 2017 |
| Cafe Loco Limited | London | 2009 |
| Cafe Manniskans Basta Van Limited | London | 2020 |
| Cafe Shack Ltd | Old Coulsdon | 2018 |
| Cafe Snob Ltd | Bristol | 2024 |
| Cafe Solo (Gloucester) Ltd | Northampton | 2023 |
| Cafe V8 Ltd | Inverness | 2013 |
| Cafe Virage Ltd. | Chelmsford | 2010 |
| Cafexpress Limited | Milton Keynes | 2003 |
| Caffe V Restaurant Ltd | London | 2011 |
| Caffrey's Limited | Burton Upon Trent | 1889 |
| Caffrey’S Executive Travel Limited | Armthorpe | 2024 |
| Caffyns Properties Limited | East Sussex | 1997 |
| Caffyns Wessex Limited | Eastbourne | 1995 |
| Café Dorado Ltd | London | 2020 |
| CAG MES Services Limited | Liverpool | 2017 |
| Cage Cable Contractors Limited | Wisbech | 2016 |
| Cage Storage Ltd | Stretford | 2021 |
| Cagebol Ltd | London | 2021 |
| Cagex (Aquatics) Limited | High Wycombe | 1972 |
| Cahaya Limited | London | 2024 |
| Caiamara Limited | London | 2004 |
| Caice Limited | Wokingham | 2011 |
| Caills Limited | London | 2025 |
| Caimino Consulting Ltd | St. Albans | 2024 |
| Cain and Fuller Sales Limited | Stonehouse | 2020 |
| Cain Nominees Ltd | Birmingham | 2022 |
| Caine Décor Limited | High Wycombe | 2018 |
| Caino International Limited | Beckenham | 2015 |
| Cairn Dubh (Holdings) Limited | Glasgow | 2026 |
| Cairn Imaging Solutions Limited | Corby | 2024 |
| Cairn Lodge Services Limited | Penrith | 2014 |
| Cairndhu Property Management Limited | Salford | 2014 |
| Cairnfinch Limited | Southampton | 1980 |