| Calcutt Farm Ltd | Northampton | 2019 |
| Caldecott Turkey Farms Limited | Birmingham | 1997 |
| Calder Tree Services Limited | Lichfield | 2009 |
| Calderbank Agri Limited | Wigan | 2023 |
| Caldhame Farms Limited | Belfast | 2018 |
| Caleb Rayner Limited | Chelmsford | 1923 |
| Caledon Estates Company | Co Tyrone | 1929 |
| Caledon Tree Consultants Ltd | Glasgow | 2012 |
| Caledonia BCK35 Fishing Limited | Nairn | 2003 |
| Caledonia Fishing Limited | Peterhead | 2026 |
| Caledonia Forest Land Investment Limited | Edinburgh | 2015 |
| Caledonia Mushrooms Ltd | Glasgow | 2022 |
| Caledonia Pharms Ltd | Edinburgh | 2026 |
| Caledonia Trawlers Ltd | Tarbert | 2002 |
| Caledonian Christmas Trees Ltd | Dunblane | 2016 |
| Caledonian Greens Ltd | Johnstone | 2024 |
| Caledonian Group Ltd | Forfar | 2020 |
| Caledonian Marts Limited | Stirling | 2015 |
| Caledonian Properties Limited | | 1960 |
| Caledonian Tree Services Ltd. | | 2007 |
| Caledonian Treepac Limited | Ellon | 2000 |
| Caledonian Wildlife Management Limited | Argyll | 2005 |
| Caledonian Wood Fuels Limited | | 2007 |
| Caledonian Woods & Camping Limited | Waterlooville | 2025 |
| Caley Brothers Limited | Lancing | 2020 |
| Caley Farms Limited | King'S Lynn | 1969 |
| Caley Fisheries (Granton) Limited | Peterhead | 1961 |
| Caley Fisheries Limited | Peterhead | 1936 |
| Caley Hall Farm Limited | West Yorkshire | 1996 |
| Caley Maritime Limited | Peterhead | 2014 |
| Calf Barns Ltd | Strabane | 2025 |
| Calf Igloo Limited | Leominster | 2015 |
| Calfcare (UK) Limited | Tarporley | 2008 |
| Calfwise Ltd | London | 2026 |
| Calgagh Farm Ltd | Omagh | 2023 |
| Calibion Ltd | Swansea | 2018 |
| Calibre Farming Limited | Norwich | 2000 |
| Calibre Gardens Limited | High Wycombe | 2022 |
| Calidad Canines NW Limited | Liverpool | 2021 |
| Callendar Estate (Biomass) Limited | Falkirk | 2009 |
| Callerheugh Limited | Edinburgh | 2012 |
| Callia Breaking & Pre-Training Ltd | Leyburn | 2022 |
| Callow Woods Limited | Monmouth | 1997 |
| Callow's Tree Surgery Ltd | Worcester | 2019 |
| Callowhill Farms Limited | Enniskillen | 2026 |
| Callum George Taylor & Partners Limited | Durham | 2018 |
| Cally Mains Farming Limited | Castle Douglas | 2014 |
| Calm Collective Ltd | Liverpool | 2022 |
| Calon Y Coed Community Hub CIC | Llanfairpwllgwyngyll | 2025 |
| Calon Y Dyffryn Ltd | Hereford | 2024 |
| Calon YN Tyfu Cyfyngedig | Pembrokeshire | 1996 |
| Calow Green Farm Limited | Skipton | 1946 |
| Caltec Contracting Ltd | Telford | 2021 |
| Calthorpe Farm Limited | Norwich | 1982 |
| Calton Brothers Contracting Limited | Diss | 2013 |
| Calton Farms Limited | Diss | 2023 |
| Calvenace Limited | Lichfield | 2021 |
| Calyx Cotton Limited | Tunbridge Wells | 2021 |
| CAM Lakes Ltd | Liverpool | 2015 |
| CAM Park Arena Limited | Cambridge | 2022 |
| CAM Park Limited | Cambridge | 2022 |
| Camacho Racing Limited | Norton | 1981 |
| Camalia Limited | Omagh | 2013 |
| Cambium Forestry Limited | Carlisle | 2015 |
| Cambium Tree Care Ltd | London | 2018 |
| Cambrian Birds Limited | Cheltenham | 2015 |
| Cambrian Farming Ltd | Tregaron | 2017 |
| Cambrian Trees Ltd | Ystrad Meurig | 2025 |
| Cambrian Woodlands Limited | Llandeilo | 1996 |
| Cambridge Asparagus Ltd | Cambridge | 2016 |
| Cambridge Canine Cuts Ltd | Cambridge | 2025 |
| Cambridge Corals Limited | Royston | 2026 |
| Cambridge Drone Services Ltd | Ruislip, | 2025 |
| Cambridge Hydrotherapy Centre Ltd | Cambridge | 2025 |
| Cambridge Plant Interiors Limited | Cambridge | 2003 |
| Cambridge Postharvest and Marketing Limited | | 2005 |
| Cambridgeshire Straw Supplies Limited | Wisbech | 2012 |
| Cambs Farms Growers Limited | Cambridgeshire | 2005 |
| Cambulls Ltd | Cambridge | 2024 |
| Cambusmore Estates Ltd. | Fraserburgh | 2002 |
| Cambusmore Ltd | Elgin | 2021 |
| Camden Stud Standardbred Farm Ltd | London | 2012 |
| Came Farm Limited | Salisbury | 1960 |
| Came Service Intl. Ltd | London | 2021 |
| Camel Community Supported Agriculture CIC | Wadebridge | 2011 |
| Camel Farm Suplies Limited | Hereford | 2025 |
| Camel GEN Limited | Whitchurch | 2024 |
| Camel Hill Farm Limited | Taunton | 2022 |
| Camelford & District Agricultural Association Limited | Camelford | 2005 |
| Camelot Farm Services Ltd | Usk | 2023 |
| Cameron Fishing Ltd | Inverness | 2017 |
| Cameron Forest and Garden Limited | Leicestershire | 2002 |
| Cameron J ZAB Ltd | Newton Abbot | 2018 |
| Cameron-Rose Limited | Fareham | 1976 |
| Cameroncavs Ltd | Bathgate | 2022 |
| Camfield Estate Company Limited | Hertfordshire | 1964 |
| Camgrain (Services) Limited | Cambridge | 1995 |
| Camhayle Cornish Hops Limited | Wadebridge | 2016 |
| Camiforce Limited | | 1995 |
| Camilon Group Ltd | Boston | 2008 |