| Cairngorm Holdings Limited | Edinburgh | 2016 |
| Cairngorm Homes Limited | Aviemore | 2016 |
| Cairnhill Apartments Management Limited | Portstewart | 2004 |
| Cairnrobin 2015 Limited | Aberdeen | 2015 |
| Cairns & Scott Group Limited | Glasgow | 2016 |
| Cairns Pharma Limited | Preston | 2003 |
| Cairnshill Management Services Company Ltd | Belfast | 2017 |
| Cairnshill Road Developments Limited | Belfast | 1985 |
| Cairnstone Finance Ltd | Dunfermline | 2026 |
| Cairnstone Law Ltd | Dunfermline | 2026 |
| Cairnstone Legal Ltd | Dunfermline | 2026 |
| Cairnx Ltd | Shoreham-By-Sea | 2016 |
| Cais Design Limited | Bedford | 2011 |
| Caiseal Court Management Co Ltd | Belfast | 2009 |
| Caithness Accounting Services Limited | Glasgow | 2004 |
| CAITL1N Limited | Harrogate | 2020 |
| Caitlin Foley Ltd | London | 2013 |
| Cake Angels Limited | Hunslet | 2018 |
| Cake Brands Ltd | Williton | 2017 |
| Cake the Boat Ltd | London | 2021 |
| Cakes by Lynz Ltd | Sevenoaks | 2025 |
| Cakes Classes and Cutters Ltd | Newcastle Upon Tyne | 2017 |
| Cakeversity Ltd | Manningtree | 2024 |
| Cakeylicious Ltd | Swansea | 2025 |
| Cakil Ltd | London | 2024 |
| Calacus Public Relations Limited | Bishop'S Stortford | 2008 |
| Caladan Limited | London | 2006 |
| Calamuchita Ltd | Orpington | 2021 |
| Calan Accountants Ltd | Neath | 2023 |
| Calauver Ltd | London | 2026 |
| Calben Scaffolding Limited | Rochester | 2013 |
| Calbrook Limited | Bletchley, Milton Keynes | 2002 |
| Calch TY Mawr Lime Limited | Brecon | 2009 |
| Calcinotto Associates (2007) Ltd | Wimborne | 2004 |
| Calcium Design Ltd | Nottingham | 2003 |
| Calculate My Product Carbon Footprint Ltd | Wolverhampton | 2019 |
| Calculator Common Limited | Manchester | 2025 |
| Calculex Accountancy Limited | Stone | 2019 |
| Calculus Asset Management Limited | London, | 2001 |
| Calculus Capital Partners Limited | London, | 2001 |
| Calculus Nominees Limited | London, | 2001 |
| Calcutax Ltd | Cheltenham | 2011 |
| Caldbeck Estates Limited | Wolverhampton | 2025 |
| Caldecott Golf & Country Club Limited | Great Yarmouth | 2005 |
| Calder & Finch Ltd | Doncaster | 2026 |
| Calder Cabins Limited | Elland | 2003 |
| Calder Construction Limited | Rochdale | 2015 |
| Calder House Estates Limited | Newmarket | 1988 |
| Calder House Properties Limited | Newmarket | 1988 |
| Calder Valley Agricultural Services Limited | Skipton | 1988 |
| Calder Valley Security Ltd | Halifax | 2011 |
| Calder-Mckenzie Limited | Manchester | 2012 |
| Caldera Consulting Ltd | London | 2011 |
| Calderdale Storage Limited | Halifax | 2015 |
| Caldergreen Ltd | Manchester | 2001 |
| Calders Limited | Birmingham | 2008 |
| Calders-It Ltd | Lowton | 2020 |
| Calderstone Group Ltd | Doncaster | 2026 |
| Caldervale Forge Works Limited | Bishop'S Stortford | 2024 |
| Caldmore Motors Ltd | Walsall | 2015 |
| Caldrion Group Ltd | Doncaster | 2026 |
| Caldwellside Plumbing & Electrical Ltd | Lanark | 2026 |
| Caldy Avenue 1967 Limited | Flintshire | 2014 |
| Caleb 1969 Limited | Boston | 2013 |
| Caleb Kamdem Mekonso Limited | Wolverhampton | 2025 |
| Caleb Roberts Financial Services Limited | Powys | 1984 |
| Caleb-Hoedl Limited | Abingdon | 2017 |
| Caledon Charters Limited | Edinburgh | 2016 |
| Caledon Developments Limited | Edinburgh | 2013 |
| Caledon Telfer House Ltd | Edinburgh | 2013 |
| Caledon Trongate Limited | Edinburgh | 2011 |
| Caledon U.K. Limited | London | 2018 |
| Caledonia Civil (Contracts) Limited | Larkhall | 1999 |
| Caledonia Consultancy Limited | Glasgow | 2003 |
| Caledonia Financial Limited | London | 1996 |
| Caledonia Land & Property Limited | London | 1996 |
| Caledonia Regeneration Limited | Glasgow | 2007 |
| Caledonia Removals Limited | Heathfield | 2013 |
| Caledonia Securities Limited | Motherwell | 2023 |
| Caledonia Timber Ltd | Melrose | 2021 |
| Caledonia TLG Bidco Limited | Wrington | 2016 |
| Caledonian Banking International Ltd. | Wallyford | 2002 |
| Caledonian Cables Limited | London | 2007 |
| Caledonian Cattle Company Limited | Kelso | 2006 |
| Caledonian City Developments Limited | Newcastle Upon Tyne | 1988 |
| Caledonian Cleaning Limited | Glasgow | 2002 |
| Caledonian Farms Limited | Newcastle Upon Tyne | 1986 |
| Caledonian Forestry Limited | Beauly | 1996 |
| Caledonian Funeral Services Limited | Glasgow | 1990 |
| Caledonian Holiday Lets Ltd | Inverness | 2016 |
| Caledonian LC Ltd | Princes Risborough | 2007 |
| Caledonian Macbrayne Limited | Port Glasgow | 2006 |
| Caledonian Occupational Health Ltd | Perth | 2010 |
| Caledonian Psychiatry Limited | Cupar | 2026 |
| Caledonian Worldwide Ltd | London | 2025 |
| Calendula Kraeutergarten Ltd | Haverfordwest | 2023 |
| Caley Fisheries (Partnerships) Limited | Peterhead | 1979 |
| Caley International Limited | Hessle | 1983 |
| Caley Investments Limited | Peterhead | 1995 |
| Caley Renewables Limited | Peterhead | 2014 |