| Cairn Magic Limited | St Georges Street | 1989 |
| Cairn of Claise Limited | Halifax | 2019 |
| Cairnbare Ltd | Failsworth | 2023 |
| Cairney Couriers Ltd | Bonnybridge | 2019 |
| Cairngorm Coach Travel Limited | Goole | 2004 |
| Cairngorm Transport Limited | Goole | 1995 |
| Cairnhill Consultancy (Scotland) Ltd | Turriff | 2025 |
| Cairnhill Couriers Ltd | Airdrie | 2021 |
| Cairns Latif Associates Limited | London | 2023 |
| Cairns Parcel Courier Services Limited | Sunderland | 2020 |
| Cairo EGY Ltd | Brighton | 2021 |
| Cairo Transport Ltd | Nottingham | 2021 |
| Caishen Logistic Ltd | Dunfermline | 2023 |
| Caisse Epargne Ltd | Basildon | 2026 |
| Caister Storage Solutions Ltd | Great Yarmouth | 2017 |
| Caistor Distribution Limited | Burnley | 1994 |
| Caithness Cabs 65 Ltd | Caithness | 2024 |
| Caithness Seacoast Ltd | Caithness | 2005 |
| Caitlin Courier Ltd | Swindon | 2020 |
| CAJ Mercian Holdings Limited | Croydon | 2016 |
| Cajack Services Limited | Halifax | 2019 |
| CAK Trans Ltd | London | 2024 |
| Cakcs Ltd | Halifax | 2017 |
| Cake Time Limited | Bedford | 2019 |
| Caklov Ltd | Derby | 2019 |
| Cakvs Ltd | Halifax | 2013 |
| CAL LAZ Ltd | Wellington | 2025 |
| CAL NSA Ltd | Glasgow | 2021 |
| CAL Sameday Limited | Warrington | 2011 |
| CAL South Limited | Warrington | 2023 |
| Cal-Tonnes Ltd | Normanton | 2018 |
| Cala DOR Charters Limited | London | 2019 |
| Cala Transport Limited | South Shields | 2025 |
| Calahans Transport Services Ltd | Leigh-On-Sea | 2019 |
| Calam Storage Limited | Wadebridge | 2023 |
| Calarasi Trans Ltd | Peterborough | 2018 |
| Calarasi Transport Limited | Peterborough | 2018 |
| Calasis Ltd | Wolverhampton | 2019 |
| Calbw Ltd | Birmingham | 2018 |
| Calcaria Travel Group Limited | Leeds | 2019 |
| Calchar Logisitcs Ltd | Didcot | 2025 |
| Calclo Limited | Waterlooville | 2014 |
| Calculated Logistics Ltd | Croydon | 2026 |
| Calculus Commercials and Logistics Ltd | Stanford Le Hope | 2018 |
| Calcutt Boats Limited | Stockton | 1974 |
| Calcutt Carriages Ltd | Swindon | 2023 |
| Caldaire Terminal Ltd | Birkenhead | 1979 |
| Caldan Korkin Limited | Glasgow | 2025 |
| Caldar International Ltd | Newcastle Upon Tyne | 2025 |
| Caldecot Consultancy Limited | Waltham Cross | 2017 |
| Calder Carrying Company Limited | Elland | 2013 |
| Calder Consulting Ltd | Colne | 2017 |
| Calderdale Property Ltd | Halifax | 2021 |
| Calderford Motor Company Limited | Leeds | 1972 |
| Calderhead Refrigerated Transport Limited | Redditch | 2003 |
| Calderstones Logistics Ltd | Leicester | 2014 |
| Calderstones Luxury Transport Limited | Port Sunlight | 2025 |
| Caldew Coaches Limited | Preston | 2000 |
| Caldew Logistics Ltd | Carlisle | 2023 |
| Caldew Travel Ltd | Wigton | 2024 |
| Caldwell Deliveries Ltd | Glasgow | 2025 |
| Calea Drive Ltd | Hull | 2025 |
| Caleb Annointing Limited | Stoke-On-Trent | 2025 |
| Caleb Logistics Ltd | Paisley | 2021 |
| Caleb Theodore Ltd | Coventry | 2022 |
| Caledon Care Limited | London | 2026 |
| Caledonia Charters Limited | Stonehaven | 2017 |
| Caledonia Logistics Limited | Motherwell | 2025 |
| Caledonia Motor Group Limited | Liverpool | 1973 |
| Caledonia Removals (Scotland) Limited | Perth | 2021 |
| Caledonia Storage Limited | Perth | 2021 |
| Caledonia VIP Limited | Gosport | 2001 |
| Caledonian Airways Ltd | Horsham | 2025 |
| Caledonian Cabs Limited | Glasgow | 2018 |
| Caledonian Chauffeurs Ltd | Glasgow | 2025 |
| Caledonian Coaches Limited | Oban | 2010 |
| Caledonian Courier Limited | Shotts | 2025 |
| Caledonian Courier Services Ltd. | | 2003 |
| Caledonian Discovery Limited | Fort William | 1995 |
| Caledonian Executive Travel Limited | Leven | 2022 |
| Caledonian Freight Ireland Ltd | Antrim | 2024 |
| Caledonian Freight Limited | Falkirk | 1983 |
| Caledonian Logistics Limited | Glasgow | 1999 |
| Caledonian Maritime Assets Limited | Renfrewshire | 1889 |
| Caledonian Railway Brechin Ltd | | 1982 |
| Caledonian Self Storage Ltd. | Inverness | 2017 |
| Caledonian Sleeper Limited | Inverness | 2007 |
| Caledonian Taxis Ltd. | Dunfermline | 2003 |
| Caledonian Travel Coach Holidays Limited | Greenock | 2020 |
| Caledonian Waste Services Ltd | Edinburgh | 2024 |
| Caleron Ltd | Stroud | 2025 |
| Calexa Fast&Safe Transport Ltd | Heywood | 2024 |
| Caley Cold Store Limited | Peterhead | 2004 |
| Calgow Transport Limited | Wigtownshire | 2000 |
| Cali Transport Limited | Romford | 2018 |
| Cali Trans Limited | Rugby | 2012 |
| Caliber Express Limited | Wantage | 2025 |
| Caliber Transport Ltd | Sittingbourne | 2017 |
| Calibre Auto Logistics Limited | Dartford | 2000 |
| Calibre Aviation Limited | Haywards Heath | 2018 |