| Dean O'Loughlin Limited | Coventry | 2019 |
| Dean Park Limited | Poole | 2014 |
| Dean Stott Group Limited | Aberdeen | 2016 |
| Dean Thornton Goalkeeping Academy Limited | Southwick | 2019 |
| Dean Weidon Limited | London | 2020 |
| Dean Wilson Art Ltd | Tamworth | 2013 |
| Dean Wood Golf Club Limited | Skelmersdale | 2019 |
| Deane Charles Limited | Leigh-On-Sea | 2024 |
| Deane Golf Club,Limited(The) | Lancs | 1919 |
| Deanland Flight Training Ltd | Eastbourne | 2017 |
| Deanlane Limited | London | 1982 |
| Deanlane Overseas Limited | London | 1983 |
| Deanleigh Holdings Ltd | Southampton | 2022 |
| Deano Hendo Limited | Whitehaven | 2018 |
| Deano Music Limited | Wigan | 2010 |
| Deans & Lines Limited | London | 2020 |
| Deans Sport, Health and Leisure Management Company Limited | Lincoln | 2010 |
| Deanshanger Playing Fields Association Limited | Milton Keynes | 2015 |
| Deanslade Fitness Ltd | Lichfield | 2025 |
| Deanspencermedia Ltd | London | 2024 |
| Deanwood Park Golf Club Limited | Newbury | 2001 |
| Deanwood Park Limited | Newbury | 1990 |
| Dear Annie, I Hate YOU Play Ltd | London | 2025 |
| Dear Bernard Limited | London | 2024 |
| Dear Darling Events Limited | London | 2026 |
| Dear Future CIC | Bexhill-On-Sea | 2023 |
| Dear Gaia Films Limited | London | 2015 |
| Dear It's Friday Ltd | London | 2024 |
| Dear PEG Theatre Company Ltd | London | 2022 |
| Dearne & District Football Club Limited | Rotherham | 2019 |
| Dearne Culture Trust | Rotherham | 1993 |
| Dearne Valley Bulldogs Arlfc Community Association | Rotherham | 2013 |
| Dearne Valley Personal Development Centre | Doncaster | 2016 |
| Death Bear Ltd | Abingdon | 2025 |
| Death Bite Productions Limited | Gravesend | 2022 |
| Death Comes to Pemberley Tour Ltd | London | 2025 |
| Death Management Limited | London | 2020 |
| Death OR Glory AGE Group Training Limited | Benton | 2025 |
| Death OR Glory Training Club Ltd | Benton | 2025 |
| Deathbrush Ltd | London | 2018 |
| Deathly Dark Tours Limited | York | 2024 |
| Deathriders Ltd | Wetherby | 2019 |
| Deathtrash Pictures Ltd | Lowestoft | 2022 |
| Deaville-Reed Ltd. | Nottingham | 2017 |
| DEB8LDN Ltd | London | 2025 |
| Debacle Limited | Sheffield | 2013 |
| Debbie Ainsworth PT Limited | London | 2007 |
| Debbie Bellinger School of Dance Limited | Shepton Mallet | 2013 |
| Debbie Claire Limited | Leicester | 2014 |
| Debbie Hicks Productions Limited | London | 2015 |
| Debbie Hingley Limited | Hampshire | 2007 |
| Debbie Howells Limited | Henfield | 2014 |
| Debbie Hyslop Ltd | Dumfries | 2025 |
| Debbie Louise Performing Arts Limited | Woodford Green | 2014 |
| Debbie Mitchell Ltd | Dumfries | 2016 |
| Debbie Moore Studios Ltd. | | 1995 |
| Debbie Timberlake Training Limited | Portsmouth | 2006 |
| Debbie Widdup Ltd | Weybridge | 2014 |
| Debbie'Z Diamond'Z Ltd | Birkenhead | 2025 |
| Debbies Events Limited | Woodford Green | 2017 |
| Debbiez Ltd | Llanrhystud | 2021 |
| Deben Ladies Fitness Limited | Woodbridge | 2012 |
| Deben Watersports Centre | Woodbridge | 2013 |
| Debenham Community Centre Limited | Stowmarket | 1991 |
| Debenham Village Hall and Playing Field Trust | Stowmarket | 2003 |
| Debi Gliori Limited | East Lothian | 2000 |
| Debi's Rudra Raaga Ltd | Rugby | 2026 |
| Deblanc Ltd | Edinburgh | 2011 |
| Deblankson CP UK II Limited | London | 2022 |
| Deblankson Fitness Group UK Limited | London | 2022 |
| Deborah Gage (Works of Art) Limited | Hailsham | 1986 |
| Deborah Gage Limited | Hailsham | 1981 |
| Deborah Kenton Limited | Llangollen | 2022 |
| Deborah Lees Art Ltd | Congleton | 2008 |
| Deborah Lerner Ltd | London | 2019 |
| Deborah Lloyd Consulting Limited | London | 2015 |
| Deborah Sheridan-Taylor Limited | London | 2023 |
| Deborah Tarr Limited | London | 2021 |
| Deborah Ward Limited | Birmingham | 2013 |
| Deborah Williams Music and Movement Ltd | London | 2024 |
| Debrett Ancestry Research Limited | Fair Oak | 1981 |
| Debs Norbury Fitness Ltd | Bolton | 2021 |
| Debs Wardle Ltd | London | 2023 |
| Debuk Limited | East Sussex | 1992 |
| Debunk Theatre | London | 2018 |
| Debut Art Limited | | 1998 |
| Debut Ltd | London | 2015 |
| Debut Studios Concessions Limited | Kingston Upon Thames | 2023 |
| Debut Studios Tattoo Limited | Kingston Upon Thames | 2020 |
| DEC Smith Fitness T/A DS Fitness Ltd | Kidwelly | 2024 |
| DEC Sweeney Tattoo Ltd | Ashton-Under-Lyne | 2023 |
| Decade Events Live Limited | Glasgow | 2018 |
| Decadence Productions Limited | Berkhamsted | 2024 |
| Decadent Drawing CIC | Whitby | 2019 |
| Decadent Times CIC | Oxford | 2021 |
| Decades Reloaded Ltd | Colchester | 2020 |
| Decagram Art and Craft CIC | Edinburgh | 2018 |
| Decay.Dj Music Ltd | Widnes | 2025 |
| Dececio Media Ltd | Bristol | 2021 |
| December BEE Limited | London | 2025 |