| Claddagh Cabs Ltd | Ware | 2022 |
| Claddagh Haulage Limited | Brigg | 2014 |
| Claddagh Logistics Ltd | Coventry | 2017 |
| Clador Transport Limited | Nuneaton | 2018 |
| Claimscape Ltd | Tipton | 2026 |
| Claires Parcel Delivery Ltd | Dundee | 2026 |
| Claire’S Transport Ltd | Bonnybridge | 2021 |
| Clamion Trans Ltd | Shrewsbury | 2019 |
| Clamiranha Ltd | Lichfield | 2019 |
| Clamora Ltd | Rugby | 2025 |
| Clamp Bros Ltd | Birmingham | 2007 |
| Clamp Farm Storage Ltd | Fareham | 2024 |
| Clampcrees Ltd | Walsall | 2024 |
| Clan International Transport Services Limited | Berkshire | 1978 |
| Clan Mcleod Coaches Limited | Broxburn | 2012 |
| Clanadonia Tours & Travel Ltd | Glasgow | 2026 |
| Clanrye CAB Company Ltd | Newry | 2017 |
| Clansman Executive Chauffeur Ltd | Hamilton | 2026 |
| Clantrip Limited | Edinburgh | 1998 |
| Clapham Business Centre Ltd | London | 2014 |
| Clapham Cabs Ltd | London | 2024 |
| Clapham Waste Paper Limited | George Street | 1979 |
| Clara Trans Ltd | Maidstone | 2024 |
| Clara Transport Ltd | Tamworth | 2025 |
| CLARA06 Limited | Luton | 2019 |
| Clarann Haulage Limited | Ballymena | 2009 |
| Clarbane Haulage Ltd | Newry | 2018 |
| Clare Haulage Limited | Craigavon | 2014 |
| Clare Sami Ltd | Spalding | 2017 |
| Clare Shipping Company Limited | London | 2026 |
| Clare Springett Limited | Guildford | 2012 |
| Claremont Cars Limited | Esher | 2007 |
| Claremont Executive Chauffeur Services Ltd | Heston | 2014 |
| Claremont Food Services Limited | | 1988 |
| Claremont House Enterprises Ltd | Bolton | 2024 |
| Claremont Logistics Ltd | Wednesfield | 2020 |
| Clarence Road Service Station Ltd | Wednesbury | 2010 |
| Clarence Star Navigation (UK) Limited | London | 2022 |
| Clarendon Freight Limited | Coalville | 2002 |
| Clarendon Haulage Co. Limited | Mellor Brook Blackburn | 1945 |
| Clarges Transport Limited | Northampton | 2025 |
| Claridon Group Limited | Stanford-Le-Hope | 1988 |
| Clarigo Logistics Ltd | London | 2020 |
| Clarigo Ltd | London | 2022 |
| Clarington Haulage Ltd | Chorley | 2020 |
| Clarion Shipping and Logistics UK Ltd | Felixstowe | 2022 |
| Claris Logistics Ltd | London | 2017 |
| Clarity Cargo Limited | London | 2020 |
| Clarity Charters Limited | Poole | 2004 |
| Clarity Clearance Services Ltd | Havant | 2026 |
| Clarity Courier Limited | London | 2022 |
| Clarity Logistics Ltd | Ashford | 2025 |
| Clarity UK Group Limited | London | 2022 |
| Clarius Trans Ltd. | Wellingborough | 2018 |
| Clark and Rose (Removals) Limited | Aberdeen | 2015 |
| Clark Brothers (Tipper Hire) Limited | Carlisle | 2007 |
| Clark Brothers Haulage Limited | Carlisle | 2018 |
| Clark Contracting Ltd | Amersham | 2002 |
| Clark Couriers Limited | Dundee | 2024 |
| Clark Haulage Limited | Leeds | 2025 |
| Clark KAY Transport Limited | Browney | 2017 |
| Clark Logistics Ltd | Cardiff | 2019 |
| Clark Thomas Limited | 10-14 West Nile Street | 2004 |
| Clark Transport Limited | Widnes | 1953 |
| Clark's Couriers Ltd | Hillside | 2025 |
| Clark's of Amersham Limited | High Wycombe | 2004 |
| Clark's Storage Ltd | Lytham St. Annes | 2020 |
| Clark's Taxis Limited | Durham | 2007 |
| Clarke and Co Limited | Worthing | 2009 |
| Clarke and Sons Removals Limited | Huntingdon | 2024 |
| Clarke Aviation Services Limited | Swadlincote | 2023 |
| Clarke Chapman Portia Port Services Limited | Liverpool | 1996 |
| Clarke Courier Services Limited | Leyland | 2024 |
| Clarke International Haulage Ltd | Newry | 2018 |
| Clarke Logistics Ltd | Newcastleton | 2025 |
| Clarke's Cabin Transport Limited | Cannock | 2018 |
| Clarke's Coaches Ltd | Glasgow | 2013 |
| Clarke's Movers UK Ltd | London | 2018 |
| Clarkes Airport Transfers Limited | Dunmow | 2023 |
| Clarkes Bulk Transport Ltd | Tamworth | 2016 |
| Clarkes Couriers Services Ltd | Glasgow | 2025 |
| Clarkes Group Travel Ltd | Birmingham | 2026 |
| Clarkes Haulage Ltd | Birmingham | 2025 |
| Clarkes of Devon Limited | Taunton | 2020 |
| Clarkes Travel Group Ltd | Birmingham | 2017 |
| Clarkie's Cars Ltd | New Malden | 2022 |
| Clarkmove Limited | Aberdeenshire | 2022 |
| Clarks Archive Storage Limited | Sudbury | 1996 |
| Clarks Bulk Haulage Ltd | Beckenham | 2023 |
| Clarks Car Storage Limited | Braintree | 2020 |
| Clarks Caravan & Boat Haulage Limited | Chichester | 2007 |
| Clarks Drivingservices Ltd | Merthyr Tydfil | 2025 |
| Clarks Transport Ltd | Doncaster | 2025 |
| Clarkson (N E) Ltd | Newcastle Upon Tyne | 2012 |
| Clarkson Port Services Limited | London | 2002 |
| Clarkson's Maritime Services Ltd | Chester | 2023 |
| Clarksons Offshore and Renewables Limited | London | 1973 |
| Clarkson’S Frozen Food Logistics Ltd | Ruislip, | 2025 |
| Clark’S Courier Services Ltd | Sudbury | 2025 |
| Clark’S Logistics Limited | Dundee | 2026 |