| Dove Valley Marquees Ltd | St. Helens | 2024 |
| Dovecliffe Fishing Limited | Kettering | 1963 |
| Dovecote Production Services Limited | Boston | 2016 |
| Dovedon Productions Ltd | Bury St. Edmunds | 2017 |
| Dovehouse Records Limited | | 1996 |
| Dover Activity Parks CIC | Dover | 2020 |
| Dover Arts Development Ltd | Dover | 2008 |
| Dover Athletic Community Trust | Dover | 2018 |
| Dover Athletic Football Club Limited | Dover | 1983 |
| Dover Bronze AGE Boat Trust | Dover | 1994 |
| Dover Design Associates Limited | London | 2007 |
| Dover Fringe Ltd | Dover | 2025 |
| Dover Gymnastics Club Limited | Dover | 2002 |
| Dover Marine Services C.I.C. | Dover | 2011 |
| Dover Operatic and Dramatic Society | Dover | 2000 |
| Dover Rugby Football Club Limited | Canterbury | 2013 |
| Dover Sea Sport Centre CIC | Dover | 2024 |
| Dover Transport Museum Society | Dover | 1983 |
| Dover Yacht Charter Limited | Hythe | 2015 |
| Dovercourt Bowling Club Limited | Essex | 1938 |
| Doves Music Limited | Macclesfield | 2003 |
| Dovesgate Limited | Westcliff On Sea | 1987 |
| Dovetail Adornments Ltd | London | 2025 |
| Dovetail Communications Limited | Cardiff | 2008 |
| Dovetail Theatre Ltd | Macclesfield | 2024 |
| Dovey Valley Motor Club (1995) Limited | Machynlleth | 1995 |
| Dovey Valley Shooting Ground Ltd | Machynlleth | 2018 |
| Dovey Yacht Club / Clwb Hwylio Dyfi | Aberdyfi | 2015 |
| DOW Stunts Limited | Ongar | 2014 |
| Dowdeswell Padel Limited | Cheltenham | 2025 |
| Dower Power Limited | Swansea | 2023 |
| Dowlais RFC Limited | Merthyr Tydfil | 2012 |
| Dowling Productions Ltd | London | 2026 |
| Dowman Labs Limited | Peterborough | 2024 |
| Down a Well Ltd | Warwick | 2026 |
| Down Autograss Ltd | Banbridge | 2024 |
| Down Community Arts | Downpatrick | 1993 |
| Down for the Count Ltd | London | 2017 |
| Down Melody Lane Ltd | Thetford | 2024 |
| Down Memory Lane Ltd | Blaydon-On-Tyne | 2024 |
| Down Range AXE Throwing Ltd | Portsmouth | 2023 |
| Down Range Ltd | Darlington | 2023 |
| Down Royal Park Racecourse Limited | Lisburn | 2018 |
| Down the Lens CIC | London | 2025 |
| Down to Funk Limited | Bury St. Edmunds | 2023 |
| Down to the Bone Limited | Surrey | 2001 |
| Down Under Ltd | London | 2020 |
| Downboy Media Ltd | Barnet | 1994 |
| Downend C C Trading Ltd | Bristol | 2018 |
| Downend Cricket Club | Bristol | 2014 |
| Downend Ladies Club Community Interest Company | Bristol | 2010 |
| Downers Management Limited | Swindon | 2016 |
| Downforce Racing Simulation Ltd | St. Albans | 2016 |
| Downham Celebrates Limited | Bromley | 2014 |
| Downham Town Social Club Limited | Downham Market | 2023 |
| Downhills Park Sports C.I.C. | London | 2026 |
| Downing Dance Academy Limited | Darlington | 2019 |
| Downing Dance Studios Ltd | Basildon | 2022 |
| Downing Sports Management Limited | Liverpool | 2017 |
| Downing's Events Ltd | Bristol | 2025 |
| Downinthestreet Limited | Watford | 2020 |
| Downland Fieldsports Limited | Winchester | 2014 |
| Downlands Sporting Limited | Winchester | 2012 |
| Downlane Limited | Holborn | 1997 |
| Downloaded UK Ltd | Sheffield | 2026 |
| Downpatrick & District Anglers Association Limited | Ballyclare | 2014 |
| Downpatrick Race Club | Downpatrick | 1949 |
| Downpatrick Sports Centre Limited | Belfast | 2014 |
| Downs Equestrian Centre Limited | Stow On The Wold | 1999 |
| Downs Equestrian Services Limited | Stow On The Wold | 1999 |
| Downs Farm (Yalding) Limited | London | 1941 |
| Downs Steam Fair Ltd | Rushden | 2024 |
| Downs-Side Riding Centre Limited | Penarth | 2014 |
| Downshire Rifle Club Limited | Co Down | 1997 |
| Downton Shabby Ltd | Solihull | 2024 |
| Downtown Disco Promotions Limited | Leeds | 2021 |
| Downtown Productions London Limited | Frome | 2024 |
| Downtown Tattoo Co. Ltd | Aberdeen | 2023 |
| Dowp Limited | Nottingham | 2024 |
| Doxa Ltd | London | 2025 |
| Doxisdj Ltd | Canterbury | 2022 |
| Doxy Runners C.I.C. | Sunderland | 2025 |
| Doya Limited | Chelmsford | 2023 |
| Doyb Enterprises Ltd | Shaftesbury | 2025 |
| Doyeen OLA Events & Media Limited | Plumstead | 2020 |
| Doyle and Dionysus Ltd | London | 2020 |
| Doyle Coaching Ltd | London | 2025 |
| Doyle Creative Services Ltd | Stockport | 2011 |
| Doyler Limited | Malton | 2012 |
| Dozens of Currants Limited | Brecon | 2016 |
| Dozy T Productions Ltd | London | 2024 |
| DP Associates GB Limited | Milton Keynes | 2008 |
| DP Interactive Limited | Brighton | 2004 |
| DP Leisure GB Limited | Milton Keynes | 2008 |
| DP Media Ltd | Gillingham | 2024 |
| DP Productions Ltd | Lewes | 2024 |
| DP Wellbeing Limited | Dundee | 2017 |
| DP44 Holdings Ltd | London | 2025 |
| DP44 Touring Limited | London | 2025 |
| DP4M Ltd | Warrington | 2023 |