| Culachy Footprint Management Limited | Fort Augustus | 2008 |
| Culag Community Woodland Trust Ltd. | Sutherland | 1995 |
| Culag Ltd | Ullapool | 2022 |
| Culberry Nursery Limited | Haywards Heath | 1950 |
| Culcrae Limited | Rotherham | 1997 |
| Culden FAW Estate Limited | Henley-On-Thames | 2019 |
| Culfargie Estates, Limited | Perth | 1924 |
| Culham Farming Limited | Chipping Norton | 2023 |
| Cullamore Ltd | Augher | 2024 |
| Cullen Allen Ltd | | 1993 |
| Cullen Contracts Ltd | Armagh | 2004 |
| Cullen Equine Solutions Ltd | Gilford | 2015 |
| Cullencroft Limited | Richmond | 1972 |
| Cullingworth Poultry Limited | Derby | 2022 |
| Culliondoo Farms Ltd | Enniskillen | 2025 |
| Cullisse Farms Ltd | Tain | 2022 |
| Cullisse Ltd. | Tain | 2005 |
| Culloden House Farm Limited | Shrewsbury | 1971 |
| Cullum Agri Limited | Diss | 2024 |
| Cullum Farm Limited | St Ives | 2011 |
| Culm Valley Poultry Limited | Wellington | 2007 |
| Culpin’S Catches Ltd | Weston-Super-Mare | 2025 |
| Culquha Farm | Kirkcudbrightshire, | 1996 |
| Culraven Limited | Kirkcudbright | 2013 |
| Cult Constrictors Ltd | Widnes | 2020 |
| Cultercullen Farms Limited | Ellon | 2026 |
| CULTIV8UK CIC | Leigh-On-Sea | 2018 |
| Cultivar Laboratories Ltd | Bolton | 2024 |
| Cultivate Tees Valley C.I.C. | Stockton-On-Tees | 2018 |
| Cultivating Community C.I.C. | Frome | 2019 |
| Cultreevate Limited | London | 2021 |
| Culver Farm Produce Limited | Faversham | 2003 |
| Culverlands Estates Limited | Reading | 2018 |
| Cumber Farms Limited | Aughnacloy | 2014 |
| Cumberland Flower Farm Ltd | Workington | 2024 |
| Cumberland Livestock Limited | Cockermouth | 2013 |
| Cumberland Wagyu Limited | Workington | 2022 |
| Cumberwell Park Limited | Bradford On Avon | 2005 |
| Cumbrae Oysters Limited | Johnstone | 1995 |
| Cumbria (Joinery & Fencing) Limited | Carlisle | 1984 |
| Cumbria Livestock Limited | Cockermouth | 2013 |
| Cumbria Miniature Dachshunds Limited | Carlisle | 2023 |
| Cumbria Tree Growers Ltd | Carlisle | 2018 |
| Cumbria Wildflowers Limited | Carlisle | 2007 |
| Cumbria Woodlands CIC | Carlisle | 2025 |
| Cumbriaconstruction Limited | Whitehaven | 2025 |
| Cumbrian Livestock Limited | Cockermouth | 2013 |
| Cumming Farming Ltd | Peterhead | 2022 |
| Cummings Agri Limited | Bovey Tracey | 2019 |
| Cummings Hall Farm Limited | Burnham-On-Crouch | 1956 |
| Cummins Civils Ltd | Sutton Coldfield | 2018 |
| Cumnor Hurst | Watford | 2008 |
| Cuncarr Cliff Services Limited | Manchester | 2025 |
| Cunning Farm Ltd | Ballygawley | 2015 |
| Cunningham Equine Services Ltd | Northwood | 2024 |
| Cunninghamdoodles Ltd | Exeter | 2025 |
| Cunningshot Dog Training Ltd | Rugby | 2019 |
| Cupgra Community Interest Company | Cambridge | 2023 |
| Cupit Farming Limited | York | 2012 |
| Curdworth Kennels Ltd | Sutton Coldfield | 2016 |
| Curious Raven Ltd. | Market Drayton | 2022 |
| Curlew House Farm Limited | Clitheroe | 2018 |
| Curlew Land Limited | Oakham | 2025 |
| Curley's Fisheries Limited | Bury | 2003 |
| Curly Brae Farm Ltd | Newry | 2010 |
| Curnaseer Limited | Melton Mowbray | 1962 |
| Curo Social Enterprise CIC | Lincoln | 2022 |
| Curry Farms Limited | Armagh | 2023 |
| Curtabemdoodles Ltd | Taunton | 2021 |
| Curtis Agricultural Limited | Taunton | 2023 |
| Curtis Chambers Equestrian Ltd | Loughton | 2023 |
| Curtis Farms Ltd | Bristol | 2023 |
| Curtis Partners Limited | Holsworthy | 2015 |
| Curtis Pitts Deer Services Ltd | Taunton | 2025 |
| Curtis Tractors Limited | Taunton | 2023 |
| Curtismill Holsteins Limited | Romford | 2023 |
| Curve 21 Limited | Whitehaven | 2026 |
| Cussens Agricultural Enterprises Ltd | Sheerness | 2025 |
| Custom Carp Boats Limited | Berkshire | 2006 |
| Custom Cutters Tree Specialists Limited | Enfield | 2006 |
| Custom Tree Care Limited | Shaftesbury | 2019 |
| CUT & Clear Tree Services Ltd | North Lincolnshire | 2006 |
| CUT & Go Tree Services Ltd | Lyme Regis | 2023 |
| CUT 'N' Clear Limited | Grantham | 2005 |
| CUT Above Tree Management Limited | London | 2007 |
| CUT Flower Garden Limited | Nottingham | 2021 |
| CUT From a Different Cloth Limited | Batley | 2014 |
| Cutforth Farming Limited | Marlborough | 1994 |
| Cuthbert Tree Care Ltd | Taunton | 2026 |
| Cutler Bros. Ltd. | Wimborne | 2002 |
| Cutlers Farm Limited | Dorchester | 1962 |
| Cutlers Wood Ltd | Woodbridge | 2018 |
| Cuton Lakes Limited | Kessingland | 2003 |
| Cutsdean Farms Limited | Cheltenham | 1997 |
| Cuttack Farm Limited | Shropshire | 2024 |
| Cutting Edge ARB Ltd | Eastleigh | 2001 |
| Cutting Edge Grounds Maintenance Ltd | Stockton-On-Tees | 2021 |
| Cutting Edge Lawn Services Ltd | Isle Of Lewis | 2024 |
| Cutting Edge Timber Ltd | Belper | 2023 |
| Cutting Edge Tree Surgery and Fencing Limited | Stanley | 2017 |