| Cobalt (Eco) Ltd | Derby | 2026 |
| Cobalt Business Solutions Limited | Nottingham | 2024 |
| Cobalt Thoroughbreds Limited | Nottingham | 2025 |
| Cobb Cows Limited | Lymington | 2019 |
| Cobb Europe Limited | Colchester | 1974 |
| Cobb Farming Limited | Dorchester | 2016 |
| Cobberdogs in the Community C.I.C. | Dinas Powys | 2021 |
| Cobbins Nursery Limited | Worthing | 1992 |
| Cobham House Vineyard Ltd | Edgware | 2023 |
| Cobley Agricultural Services Ltd | St. Neots | 2022 |
| Cobnut Farm Limited | Aylesford | 2022 |
| Cobnut Stables Ltd | Swanley Village | 2023 |
| Cobra Bloodstock Limited | Alfreton | 2017 |
| Cobrigdale Limited | Insch | 2022 |
| Cobs Plods and Irish Horses UK Ltd | Stockport | 2024 |
| Cobwood Tree Services Ltd | Leatherhead | 2015 |
| Cock and Pullet Egglistics Limited | Northampton | 2009 |
| Cock of the North (Poultry) Limited | Mexborough | 2002 |
| Cockalous Ltd | Colchester | 2025 |
| Cockapoo Adventure Club Limited | Thornton Heath | 2020 |
| Cockapoo World Ltd | Denby | 2026 |
| Cockayne Limited | Sheffield | 2023 |
| Cockburn Farms Ltd | Ripon | 2016 |
| Cockburn House Ltd | Carlton In Lindrick | 2022 |
| Cockcroft Farming Limited | Womersley | 2019 |
| Cocker Bar Orchard Limited | Leyland | 2025 |
| Cocker Doodle POO Limited | Guildford | 2021 |
| Cockerills Farming Limited | Pickering | 2018 |
| Cocking Sporting Club Limited | Easebourne | 2024 |
| Cockpit Land Ltd | York | 2014 |
| Cocktree Farm Limited | Crediton | 2004 |
| Coco & Scamp Kennels Ltd. | Ceredigion | 2021 |
| Coco Ease Ltd | Bury St Edmunds | 2022 |
| Coco Falcons Ltd | Alnwick | 2021 |
| Cocoade Ltd | London | 2022 |
| Cocofrutas Limited | Exeter | 2021 |
| Coconut Enterprises Limited | London | 1996 |
| Cocuro Limited | High Wycombe | 2021 |
| Coddington Bracewell Limited | Preston | 2026 |
| Codiak Limited | Ripon | 2024 |
| Codnor Park Fishery Limited | Alfreton | 2001 |
| Cods Corner Management Limited | Sevenoaks | 1981 |
| Cody Blue Solutions Limited | Totnes | 2023 |
| Cody Fishing Limited | Buckie | 2018 |
| Coed Camddwr Limited | Lampeter | 2007 |
| Coed Coch Farms Ltd | Pwllheli | 2016 |
| Coed CWM CAE Farm Limited | Ogmore Vale | 2021 |
| Coed Cymru CYF | Machynlleth | 1989 |
| Coed Dyfi Woodlands Ltd | Machynlleth | 2004 |
| Coed Natur CYF. | Bangor | 2024 |
| Coed Organic Ltd | Newport | 2018 |
| Coed Penmaenuchaf Ltd | Dolgellau | 2018 |
| Coed Symlog Ltd | Aberystwyth | 2024 |
| Coed Y Dyffryn Ltd | St Asaph | 2022 |
| Coedcae Farm Limited | Aberdare | 2020 |
| Coedcae Rosser Ltd | Caerphilly | 2012 |
| Coeden Fach Community Interest Company | Swansea | 2013 |
| Coedwig Creu Ltd | Grangetown | 2021 |
| Coedwig Gymunedol Long Wood Community Woodland | Lampeter | 2004 |
| Coedwigaeth Pencelyn Limited | Wrexham | 2011 |
| Coedylan Forestry CYF | | 2002 |
| Coetir Mynydd | Bangor | 2003 |
| Cofarm Cambridge | Cambridge | 2019 |
| Cofco International UK Ltd | Ipswich | 1920 |
| Coffey Harvesting Limited | Carlisle | 2025 |
| Coforest Limited | Bath | 2020 |
| Cofton Farms Ltd | Alvechurch | 2016 |
| Cofton Greens Ltd | Stourbridge | 2024 |
| COG International Limited | Aldershot | 1999 |
| Cogan Access Limited | Helensburgh | 2018 |
| Cogent Breeding Limited | Chester | 1992 |
| Coggon Brothers Limited | Scunthorpe | 2014 |
| Cogle Wood Ltd | Wick | 2014 |
| Coham Bridge Farm Ltd | Beaworthy | 2019 |
| Coharra Farms Ltd | Co Armagh | 2018 |
| Cohen & England Ltd | Grantham | 2022 |
| Coigach Salmon Fisheries Limited. | Ullapool | 1950 |
| Coille Righ Forest Estates Limited | Lossiemouth | 2010 |
| Coillear Forestry Ltd | Inverness | 2018 |
| Coillemore Farms Ltd | Invergordon | 2022 |
| Coilltean ÙRA Forest Services Ltd | Mauchline | 2025 |
| Coinros Park Nurseries Limited | Lydney | 2001 |
| Cokel Woods Limited | Dinas Powys | 2024 |
| Cokenach Limited | Royston | 2002 |
| Cokers Frome Farm Limited | Dorset | 1972 |
| Coking Farm Limited | Gillingham | 2010 |
| Colaren Farms Ltd | Fraserburgh | 2015 |
| Colban Limited | Kidlington | 2007 |
| Colbeggie Fruits Limited | | 2003 |
| Colben Limited | Northampton | 1996 |
| Colbert Stud Ltd | Upminster | 2022 |
| Colbruach Estate Limited | Bellshill | 2015 |
| Colby Farms Limited | Appleby-In-Westmorland | 2008 |
| Colchester Angling Preservation Society Limited | Colchester | 2010 |
| Colchester Fresh Fish Ltd | Colchester | 2015 |
| Colchester Oyster Fishery Limited | Colchester | 1965 |
| Colchester Turf and Topsoil Limited | Colchester | 2002 |
| Colclough Game and Sporting Ltd | Welwyn | 2022 |
| Coldbrook Farming Limited | Barry | 1998 |
| Colden Farming Limited | Tunbridge Wells | 1997 |