| Dbrm Ltd | Bangor | 2016 |
| DC & SON Farm Ltd | Crewe | 2021 |
| DC Agricultural Fabrication Ltd | Pontypridd | 2025 |
| DC Cattle Ltd | Newry | 2003 |
| DC Equestrian Limited | Crossgar | 2017 |
| DC Farming | Dumfries | 2022 |
| DC Fishing Scotland Ltd | Dundee | 2013 |
| DC Freshwater Fish Ltd | Alton | 2020 |
| DC Prime Exotics Ltd | Westerham | 2026 |
| DC Racing Limited | Shenfield | 2013 |
| DC Shellfish Ltd | Montrose | 2021 |
| DC Tree Services Ltd | Ipswich | 2019 |
| DC2 Engineering Ltd | Brecon | 2012 |
| DCG Agricultural Services Ltd | Penrith | 2025 |
| Dcgujjar Farmhouse Limited | Luton | 2024 |
| DCM Property Services Limited | Dartford | 2014 |
| DCS Cleaning Scotland Ltd | Edinburgh | 2021 |
| DCT Trading Limited | Carlisle | 2019 |
| DD & CM Jones Limited | Cardigan | 2006 |
| Ddaear Ydym NI ! WE ARE Earth ! C.B.C. | Carmarthen | 2021 |
| Ddah Ltd | Stockport | 2015 |
| DDG Dog Breeders Limited | Ferndown | 2025 |
| DDH Williams Ltd | Llandysul | 2025 |
| DDM Countryside Management Ltd | Cumnor | 2025 |
| DDS Aquatics Limited | Templecombe | 2019 |
| DDS Fishing Ltd. | Fraserburgh | 2007 |
| Ddtr Farming Limited | Exeter | 2026 |
| Ddtr Potatoes Ltd | Exeter | 2024 |
| DE Brade Limited | Dundee | 2012 |
| DE Courcy Ireland Partners | Royston Herts | 1980 |
| DE Nickols & Sons Limited | Lincolnshire | 1955 |
| DE Palma Ltd | Wokingham | 2021 |
| DE Pickervance & Sons Ltd | Preston | 2013 |
| DE Potassium Salt International Trading Limited | Coventry | 2026 |
| DE Readman Farriery Limited | Scarborough | 2012 |
| DE Rosa-Maxted (Properties) Limited | Worthing | 2023 |
| De-Veg Limited | Blackburn | 2016 |
| Deacon & SON (Farmers) Limited | Scaldwell | 1965 |
| Deacon Dairies Limited | Leyland | 2007 |
| Deadwood Arborists Tree Care Specialists Ltd | Wallasey | 2021 |
| Deakin Oak Limited | Uckfield | 1999 |
| Deal Bros. Limited | Leigh-On-Sea | 2000 |
| Deal Mane Ltd | Craigavon | 2025 |
| Dealey & Associates Limited | Bury St Edmunds | 2008 |
| Dealey Environmental Ltd | Bury St. Edmunds | 2007 |
| Dealin' Green Ltd | Biggar | 2023 |
| Deamarc Limited | Petersfield | 1982 |
| Dean Agriculture Ltd | Dorchester | 2026 |
| Dean Bartram Agricultural Contractors Limited | Cambridge | 2015 |
| Dean Dargue Limited | Appleby-In-Westmorland | 2006 |
| Dean Farming Limited | Lincoln | 1993 |
| Dean Mould Limited | Sunderland | 2002 |
| Dean Price Equestrian Ltd | Shrewsbury | 2023 |
| Dean Robert Patrick Limited | Gainsborough | 2003 |
| Dean Valley Farm Limited | Stockport | 1999 |
| Dean Watkins Ltd | Brecon | 2012 |
| Deanacre Ltd | Chalfont St Peter | 2021 |
| Deane Contractors Limited | Stafford | 2012 |
| Deans Barn Ltd | Polegate | 2024 |
| Deans Farm Estate Ltd | Lewes | 2017 |
| Deans Farms Ltd | Macclesfield | 2002 |
| Deanston Farms Limited | Dumfries | 2004 |
| Deanswood Equestrian Centre Limited | Maidstone | 2006 |
| Dear Family Farms Limited | Selby | 2025 |
| Dearmamas Group Limited | London | 2025 |
| Dearnsdale Fruit | Warwickshire | 2004 |
| Debden Court Limited | Canterbury | 2009 |
| Deben Agronomy Ltd | Ipswich | 2018 |
| Deben Horticulture Solutions Ltd | Ipswich | 2017 |
| Deben Lodge Farms Limited | Felixstowe | 2020 |
| Deben Valley Environmental Ltd | Bury St Edmunds | 2018 |
| Debenham Hall Farms Limited | Ipswich | 1964 |
| Deborah Asalu & Jide Olokundun Foundation International | Wakefield | 2018 |
| Decagone Ltd | London | 2020 |
| Decco Holdings UK Limited | Warrington | 2021 |
| Declan Irvine Dogs Limited | Coatbridge | 2025 |
| Declan Levey Ltd | Mansfield | 2024 |
| Declan Rooney Limited | Lanark | 2017 |
| Declan Russell Ltd | Tonbridge | 2022 |
| Decoy Farming Limited | Aylesbury | 2014 |
| Dedham Vale Tree Surgery Limited | Colchester | 2017 |
| Dedicated to Dogs Limited | Skipton | 2015 |
| DEE Coastal Catch Ltd | Deeside | 2023 |
| DEE Seafoods Limited | Holyhead | 2017 |
| Deefields Farm Limited | Ellesmere | 2010 |
| Deehaven Farms Ltd | Faversham | 1981 |
| Deeley Farms Limited | Moreton-In-Marsh | 1996 |
| Deem Farm Holdings Limited | Waltham Cross | 2020 |
| Deemshill Farms Limited | Milford Haven | 1955 |
| Deene Farms Ltd | Northampton | 2010 |
| Deep Blue Catch Limited | Wrexham | 2025 |
| Deep Blue Trading Limited | Benfleet | 2024 |
| Deep Clough Farm Limited | Preston | 2023 |
| Deep Dark Wood Holdings Ltd | Tunbridge Wells | 2015 |
| Deepair Limited | Bath | 1997 |
| Deepbluenortheast Ltd | Sunderland | 2025 |
| Deepbluesee Limited | Walton-On-Thames | 2021 |
| Deepdale Farm Limited | King'S Lynn | 1964 |
| Deepdale Trees Holdings Limited | Sandy | 2020 |
| Deepdale Trees Limited | Sandy | 1995 |