| Dunlop and Lugton Park Association | Kilmarnock | 2004 |
| Dunlop Leisure Ltd | Coleraine | 2023 |
| Dunlop Millennium Woodland Nature Park | Lanarkshire | 1999 |
| Dunlop Sports and Community Club Limited | Coventry | 2020 |
| Dunlop TVR Challenge Ltd | Poulton-Le-Fylde | 2017 |
| Dunmhor Sporting Ltd | Kingussie | 2016 |
| Dunmore Brothers Ltd | London | 2023 |
| Dunmore Limited | Northwood | 1989 |
| Dunmore Productions Limited | London | 2025 |
| Dunmow Music Club Ltd | Dunmow | 2022 |
| Dunmow Town FC Ltd | Colchester | 2022 |
| Dunn & Co. (Shopfitters) Limited | Tyne & Wear | 1977 |
| Dunnage & Larkin Limited | Harrow | 2010 |
| Dunnec Ltd | London | 2021 |
| Dunnico Media Ltd | London | 2012 |
| Dunnings Mill Squash & Leisure Centre Limited | Epsom | 1976 |
| Dunnington Sporting Club Ltd | King'S Lynn | 2023 |
| Dunnington Sports Club Limited | York | 2010 |
| Dunoon & Cowal Heritage Trust | Dunoon | 1992 |
| Dunraven Design Ltd | Whitstable | 2014 |
| Dunrobin Castle Limited | Golspie | 1973 |
| Dunrobin Sporting Ltd | Golspie | 2014 |
| Duns MX Ltd | Penrith | 2019 |
| Dunscar Golf Club Limited | Bolton | 1959 |
| Dunscroft Welfare Sports Association | Doncaster | 2006 |
| Dunstable Town Bowls Club Limited | Dunstable | 2022 |
| Dunstaffnage Marina Limited | Argyll | 1994 |
| Dunstall FIR Group Limited | Woking | 2026 |
| Dunstanburgh Castle Golf Course Limited | Alnwick | 2022 |
| Dunster Winter Festival C.I.C. | Minehead | 2024 |
| Dunston UTS (FC) Limited | Gateshead | 2022 |
| Dunston Village Hall Limited | Stafford | 2011 |
| Dunteige Shoot Ltd | Ballymena | 2019 |
| Dunwich Greyfriars Trust | Saxmundham | 2012 |
| Dunwood Livery Yard Ltd | Oldham | 2025 |
| DUO London Limited | London | 2017 |
| DUO Rental Ltd | London | 2022 |
| Duology Entertainment Ltd | Cardiff | 2026 |
| Dupond Collective Limited | Maldon | 2026 |
| Dupont Dance Stage School Limited | Leics | 2006 |
| Duque Ltd | London | 2021 |
| DUR DUR Band International Ltd | Cardiff | 2018 |
| Durable Fitness Ltd | Wilmslow | 2015 |
| Durag Motorsport Ltd | London | 2023 |
| Duran Fentiman Limited | York | 2014 |
| Durdle Moon Records Limited | Mildenhall | 2020 |
| Durham Amateur Rowing Club 1860 Limited | Durham | 2020 |
| Durham Automobile Club Limited | Houghton Le Spring | 1983 |
| Durham Cathedral Open Treasure Limited | Durham | 2012 |
| Durham City Association Football Club Limited | Newcastle Upon Tyne | 2002 |
| Durham City GC Trading Limited | Durham | 2018 |
| Durham City Golf Club Limited | Durham | 1927 |
| Durham City Gymnastics Club C.I.C. | Durham | 2016 |
| Durham City Rugby Football Club Limited | Durham | 2010 |
| Durham City Rugby Supporters Club Limited | Durham | 2016 |
| Durham City Scuba Ltd | Chester Le Street | 2026 |
| Durham Climbing Centre Limited | Bishop Auckland | 2011 |
| Durham Climbing Kids Ltd | Bishop Auckland | 2023 |
| Durham Community Tennis Partnership Community Interest Company | Consett | 2018 |
| Durham County Cricket Foundation | Chester Le Street | 2008 |
| Durham County Football Association Limited | Chester Le Street | 2001 |
| Durham County Golf Union Ltd | Darlington | 2026 |
| Durham County Rugby Football Union Limited | Gateshead | 2017 |
| Durham County Rugby Football Union Referees' Society Limited | Hartlepool | 2019 |
| Durham County Show Limited | Newcastle Upon Tyne | 2019 |
| Durham Cricket C.I.C. | Chester Le Street | 2004 |
| Durham Dramatic Society Limited | Durham | 1946 |
| Durham Drums Ltd. | Ware | 2018 |
| Durham FC Limited | Houghton -Le-Spring | 2019 |
| Durham Folk Festival CIC | Hartlepool | 2026 |
| Durham Fringe CIC | Durham | 2021 |
| Durham Ice and Sports Stadiums Limited | Whitley Bay | 1952 |
| Durham Indoor Bowling Community Association Limited | Durham City | 1991 |
| Durham Jazz Festival CIC | Durham | 2025 |
| Durham Microlights Ltd | Durham | 2016 |
| Durham Musical Theatre Company Limited | Durham | 2014 |
| Durham Musical Youth Theatre Ltd | Durham | 2024 |
| Durham Regatta | Durham | 2010 |
| Durham Scenic Workshops Limited | Sacriston | 2013 |
| Durham Show Limited | Newcastle Upon Tyne | 2019 |
| Durham Wildlife Trust | Houghton Le Spring | 1971 |
| Durham Women's Football Club Ltd | Durham | 2013 |
| Durian Monkey Limited | London | 2025 |
| Durkar Devils JFC Limited | Wakefield | 2015 |
| Durley Beast Ltd | South Petherton | 2023 |
| Durnovaria Silver Band Trust | Bridport | 2013 |
| Durnthal Limited | Braintree | 2021 |
| Duroc Music Limited | Romsey | 2019 |
| Durose Studios CIC | Lytham St.Annes | 2024 |
| Durrani Stunts Ltd | Rugby | 2023 |
| Durrants Farm Equestrian Limited | Gawcott | 2013 |
| Durrants Gym Ltd | London | 2024 |
| Dursley Minnows Rugby Limited | Dursley | 2023 |
| Dursley Town Sports Club Limited | Dursley | 2018 |
| Durty Events Limited | Selkirk | 2011 |
| Dusk 'TIL Dawn Entertainment Limited | Durham | 2006 |
| Dusk 7 Events Limited | Glossop | 2021 |
| Dusk Till Dawn Ltd | Nottingham | 2006 |
| DUSK-2-DAWN Fitness Limited | London | 2012 |
| Dussindale & Hellesdon Rovers FC Limited | Norwich | 2022 |