| Carloway Crofts Limited | Isle Of Lewis | 2014 |
| Carlsbay Limited | Stornoway | 2019 |
| Carlton Contracting Services Limited | Thirsk | 1998 |
| Carlton House Farm Ltd | Nuneaton | 2019 |
| Carlton Stud Limited | Leicester | 2016 |
| Carlung Estate Company Limited | West Kilbride | 1906 |
| Carman 4SEASONS Ltd | Ipswich | 2009 |
| Carmarthenshire Falconry Limited | Carmarthenshire | 2018 |
| Carminnows Estate Limited | Dumfries And Galloway | 2011 |
| Carn Hill Livestock Ltd | Newry | 2024 |
| Carn Nicholas Farm Limited | Swansea | 2023 |
| Carnanee Competition Livery Limited | Belfast | 2014 |
| Carnbroe Estates Farms Limited | Glasgow | 2020 |
| Carncastle Properties Limited | Newry | 2009 |
| Carnesure Farms Limited | Co Down | 1997 |
| Carney Capital Ltd | Birmingham | 2021 |
| Carnie Bees Ltd | Inverurie | 2023 |
| Carnkirk Farms Ltd | Bushmills | 2019 |
| Carnland Limited | Craigavon | 2017 |
| Carnoch Ventures Ltd | Inverness | 2018 |
| Carnoustie Ltd | London | 2019 |
| Carnpark Farms Limited | Castlewellan | 2020 |
| Caroline April Ltd | Preston | 2019 |
| Carols Canine Caring Limited | Southampton | 2016 |
| Carousel Fishing Company (Grimsby) Limited | East Yorkshire | 2019 |
| Carp Angling Adventures Limited | Ashford | 2025 |
| Carp Dreams Limited | Coventry | 2012 |
| Carp Fishing Lakes Ltd | Peterborough | 2020 |
| Carp Luxe Limited | Halesowen | 2024 |
| Carp Venues UK Limited | Grays | 2016 |
| Carp Waters (Shropshire) Ltd | Telford | 2019 |
| CARP1.COM Limited | Haverhill | 2005 |
| Carpediem Angling Limited | Epping | 2002 |
| Carpenters Hill Dairy Limited | Redditch | 2007 |
| Carpers Journal Ltd | Maidstone | 2025 |
| Carpfix Ltd | Colchester | 2020 |
| Carps EYE Ltd | Oxted | 2022 |
| Carpvale Fisheries (NO.1) Ltd | Driffield | 2021 |
| Carr Bridge Farm Ltd | Poulton Le Fylde | 2014 |
| Carr Brothers (Farmers) Limited | Wellingborough | 2004 |
| Carr Farm Limited | Lincoln | 2017 |
| Carr Farmers (Northants) Limited | Wellingborough | 2001 |
| Carr Farmers Management Limited | Wellingborough | 2000 |
| Carr Hill Farm Ltd | Beverley | 2014 |
| Carr House Allotment Social Enterprise Limited | Doncaster | 2005 |
| Carr House Farm Limited | Driffield | 2004 |
| Carr Lane Kennels Limited | Driffield | 2006 |
| Carr Mount Estate Limited | Near Whitby | 2008 |
| Carr's UK Limited | Worksop | 2003 |
| Carr-Ellison Farms | Alnwick | 1962 |
| Carradale Marine Services Limited | Thornton-Cleveleys | 2019 |
| Carraig View Contracts Ltd | Dungannon | 2019 |
| Carrdale Ltd | Clitheroe | 2025 |
| Carrdoon Limited | Leeds | 2013 |
| Carreg Holdings Ltd | Mold | 2021 |
| Carreg Land Limited | Llandeilo | 2021 |
| Carrhey Horticultural Ltd | Preston | 2003 |
| Carrick Chemicals Ltd. | Newry | 2017 |
| Carrick Enterprises Limited | Dereham | 2022 |
| Carrick Farms Ltd | Aughnacloy | 2007 |
| Carrick Road Enterprises Limited | Banbridge | 2025 |
| Carrickcloughan Farming Ltd | Newry | 2013 |
| Carrickmacstay Farms Ltd | Newry | 2021 |
| Carrickview Stud Limited | Armagh | 2024 |
| Carrigeen Farms Limited | Ballymena | 1979 |
| Carrington Bloodstock Ltd | Melton Mowbray | 2022 |
| Carriston Farming Limited | Glenrothes | 2019 |
| Carrock Fell Farming Ltd | Penrith | 2025 |
| Carrog Roberts CYF | Porthmadog | 2022 |
| Carron Brown Limited | Wimborne | 2020 |
| Carron Fishings Limited | Aberdeen | 2018 |
| Carron Valley Fisheries Limited | Stirling | 2018 |
| Carronbridge Sawmills Limited | Dumfries | 1995 |
| Carrowkeel Farms Limited | Omagh | 2026 |
| Carrthorpe Limited | Middlesbrough | 2023 |
| Carruthers Farming | Thornhill | 2022 |
| Carruthers Livestock Ltd | Llanfyllin | 2021 |
| Carsawsan Woodland Ltd | Falmouth | 2018 |
| Carse Estate Limited | London | 1996 |
| Carsegowan Acres Ltd | Newton Stewart | 2025 |
| Carsena Bloodstock Ltd | Ballymoney | 2024 |
| Carshalton Lavender Community Interest Company | Wallington | 2009 |
| Carsphairn Community Woodland Limited | Thornhill | 2018 |
| Carswell Maritime Group Ltd | Auchterarder | 2025 |
| Carter Brown Global General Trading UK Ltd. | London | 2021 |
| Carter Countryside Services Limited | Boncath | 2014 |
| Carter Farms Limited | Trimdon Station | 2020 |
| Carters Cornish Shellfish Limited | Redruth | 2018 |
| Carters Lodge Farm Limited | Chichester | 2010 |
| Cartledge Agri Limited | Shepton Mallet | 2023 |
| Cartledge Farms Limited | Chesterfield | 1985 |
| Cartmel Honey Co Ltd | Grange-Over-Sands | 2025 |
| Carver Development Limited | Marlborough | 2010 |
| Carvers Hill Estate Ltd | Shrewsbury | 2020 |
| CAS Environmental Services Ltd | Liverpool | 2010 |
| CAS Farm Ltd | Stockport | 2024 |
| Cascade Legacy Ltd | Belfast | 2024 |
| Caseley Farm Dairy Ltd | Wedmore | 2022 |
| Casely Farms Limited | Sherborne | 1997 |
| Casewick Park Limited | Stamford | 1998 |