| DE Valence Pavilion Tenby CIC | Tenby | 2024 |
| DE Veys FC 1923 Ltd | Bristol | 2026 |
| DE Vries Art Ltd | London | 2021 |
| DE Wolf Sports Ltd | East Grinstead | 2014 |
| De'Ath & Sons Limited | Blackpool | 2005 |
| De'Osa Events Ltd | Snodland | 2017 |
| De-Mix Music Limited | Pulborough, | 1987 |
| De-Signs Signs& Graphics Centre Limited | Hornbeam Park, Harrogate | 2003 |
| De-Sky Multimedia UK Ltd | Darlington | 2025 |
| De-Vey Events Ltd | Bridgwater | 2024 |
| De-Vey Group Ltd | Bridgwater | 2024 |
| Deacon Blue Limited | Southwark | 2016 |
| Deacon Fitness Limited | Bradford | 2021 |
| Deacon Media Ltd | Shipley | 2025 |
| Deacons Martial Arts Ltd | Theddingworth | 2021 |
| Deacons Martial Arts Lutterworth Ltd | Lutterworth | 2024 |
| Deacons Martial Arts Oadby Ltd | Leicester | 2024 |
| Deacs Limited | Leicester | 2005 |
| Dead Air Ltd | Guildford | 2024 |
| Dead Beat Club Ltd | Sheffield | 2011 |
| Dead Buni Limited | Leicester | 2018 |
| Dead CAN Dance Touring Ltd | Manchester | 2018 |
| Dead Cities Limited | Nottingham | 2014 |
| Dead Earnest Theatre | Sheffield | 1996 |
| Dead END Kings Ltd | Leeds | 2025 |
| Dead Hand Records Ltd | Saltash | 2025 |
| Dead Hang Club Ltd | Glasgow | 2025 |
| Dead Head Promotions Ltd | Romsey | 2026 |
| Dead Hung Productions Ltd | Eastbourne | 2023 |
| Dead Isle Ltd | Margate | 2025 |
| Dead Man's Whiskey Ltd | London | 2019 |
| Dead Melodies Limited | Brighton | 2022 |
| Dead Northern Limited | Harrogate | 2020 |
| Dead Poets Live Limited | Milton Keynes | 2017 |
| Dead Rabbits Live Ltd | Southampton | 2023 |
| Dead Rabbits Theatre | Bournemouth | 2018 |
| Dead Rebel Limited | London | 2017 |
| Dead Skull Ltd | Nuneaton | 2026 |
| Dead Sound Management Limited | Peterborough | 2020 |
| Dead Strawberry Limited | London | 2021 |
| Dead Sweet Monro Limited | London | 2020 |
| Dead Wing Ltd | Magherafelt | 2015 |
| Deadbeat Films Ltd. | Glastonbury | 2014 |
| Deadbeats Partyband Limited | Poulton-Le-Fylde | 2025 |
| Deadbox Records Ltd | Nottingham | 2018 |
| Deadgoodesigns Limited | Aylesbury | 2000 |
| Deadheat Racing Limited | London | 2012 |
| Deadknocked Ltd | Reading | 2024 |
| Deadline Day Soccer Consultants Ltd | Glasgow | 2023 |
| Deadline Day Sports Ltd. | Glasgow | 2017 |
| Deadline Technical Management Limited | Weybridge | 2003 |
| Deadlocked Ltd. | Reading | 2017 |
| Deadly Dozen Academy Limited | Macclesfield | 2019 |
| Deadly Dozen Gym Ltd | Macclesfield | 2015 |
| Deadly Dozen Limited | Macclesfield | 2024 |
| Deadly Games Ltd | Alton | 2023 |
| Deadmeet Ltd | Bolton | 2025 |
| Deadmen Music Limited | Carluke | 2018 |
| Deadposh Limited | Farnham | 2006 |
| Deadsheepgolf Ltd | Welling | 2025 |
| Deadwax Music Ltd | Holmfirth | 2024 |
| Deadweight Theatre Ltd | London | 2022 |
| Deaf Dog Media Ltd | Stourbridge | 2026 |
| Deaf Events UK Ltd | Bristol | 2017 |
| Deaf Gwdihŵ CIC | Cardiff | 2024 |
| Deaf Rave CIC | London | 2023 |
| Deafersify CIC | Liverpool | 2021 |
| Deafinitely Theatre | Wembley | 2005 |
| Deagal FC Ltd | Chatham | 2024 |
| Deal & Dover Park Tennis CIC | Canterbury | 2023 |
| Deal Arts Management CIC | Deal | 2007 |
| Deal Betteshanger & Walmer Rugby Sports & Social Club Ltd | Deal | 2001 |
| Deal Kent Pride CIC | Deal | 2025 |
| Deal Museum Trust | Deal | 2000 |
| Deal Music and Arts Limited | Eastry | 2003 |
| Deal Town Football Club (2001) Limited | Deal | 2001 |
| Dealflow Tech Ltd | Worthing | 2024 |
| Dealpraise Limited | Woodford Green | 1992 |
| Deamon Limited | London | 2006 |
| Dean Ager Limited | Lancing | 2016 |
| Dean and Chadlington Summer Music Festival | Chipping Norton | 2007 |
| Dean Andrews Productions Limited | Rotherham | 2015 |
| Dean Austin Promotions Limited | Welwyn | 2012 |
| Dean Christopher Adams Ltd | Chingford | 2025 |
| Dean Craig Productions Limited | Stanmore | 2009 |
| Dean Curran Coaching Ltd | Glasgow | 2025 |
| Dean Forest Cycles Limited | Cheltenham | 2011 |
| Dean FOX Illustration Limited | Epping | 2014 |
| Dean Harrison Racing Limited | Bradford | 2014 |
| Dean Heritage Museum Trust | Cinderford | 1985 |
| Dean Ivory Racing Limited | Hertfordshire | 2002 |
| Dean Jorgensen Magic Limited | West Molesey | 2018 |
| Dean Jukes Racing Ltd | Nottingham | 2024 |
| Dean Kelland Artist Ltd | Sutton Coldfield | 2019 |
| Dean Laser Clay Ltd | Cinderford | 2019 |
| Dean Leak Performance Coaching Ltd | Tonbridge | 2020 |
| Dean Lewis Pro-Am Boxing & Fitness Ltd | Weston-Super-Mare | 2018 |
| Dean MAC Ltd | Manchester | 2026 |
| Dean Martin Props Limited | Manchestet | 2013 |
| Dean Moor Off-Road Park Limited | Cumbria | 2004 |