| Dorint Limited | London | 2007 |
| Doris Jones Foundation | Southampton | 2011 |
| Dork GIN Ltd | Dorking | 2017 |
| Dorking Court RTM Company Limited | Stanmore | 2011 |
| Dorling Industries Limited | Braunton | 2026 |
| Dorma Ltd | London | 2019 |
| Dorman Traffic Products Limited | Oxford | 1920 |
| Dorman Traffic Products Pension Trustees Limited | Oxford | 1991 |
| Dormans Court Management Company Limited | Bangor | 1998 |
| Dormant 0298 Limited | London | 2025 |
| Dormant 1049 Limited | London | 2025 |
| Dormant 10761755 Ltd | Birmingham | 2017 |
| Dormant 1234 Limited | Bromley | 2020 |
| Dormant Company 09887016 Limited | Penzance | 2015 |
| Dormant Company 11670317 Ltd | Kington | 2018 |
| Dormant Company 11951926 Ltd | West Drayton | 2019 |
| Dormant Company Names Limited | Felixstowe | 2020 |
| Dormant Nominees One Limited | High Wycombe | 1958 |
| Dormant Nominees Two Limited | High Wycombe | 1973 |
| Dormant Venture Limited | Colne | 2013 |
| Dormantco Limited | Aberdeen | 2013 |
| Dormington Road 1963 Limited | Portsmouth | 2015 |
| Dormy Houses Ltd | Colchester | 2020 |
| Dornack Logistics Limited | Hornchurch | 2009 |
| Dornie Community Projects Limited | Kyle | 2002 |
| Dorogan Consulting Ltd | Harrogate | 2012 |
| Dorothea Limited | Chesterton, Newcastle Under Lyme | 2000 |
| Dorset & Hampshire Cat Flap Installers Limited | Poole | 2021 |
| Dorset Aggregates Limited | Wimborne | 2016 |
| Dorset Cereals Limited | London | 1993 |
| Dorset Cider Farm Limited | Bournemouth | 2016 |
| Dorset Concrete Pumping Ltd | Poole | 2018 |
| Dorset Cottage Holidays Limited | Altrincham | 2011 |
| Dorset Crane Hire Limited | Exeter | 2021 |
| Dorset Diving Training Services Limited | Bournemouth | 2015 |
| Dorset DIY Ltd | Blandford Forum | 2023 |
| Dorset Ecology Limited | Dorchester | 2012 |
| Dorset Electrical Group Limited | Weymouth | 2025 |
| Dorset Filters Limited | Broadstone | 2011 |
| Dorset Growth Hub Ltd | Reading | 2024 |
| Dorset Highways Limited | Langport | 2004 |
| Dorset Holidays Ltd. | Orpington | 2023 |
| Dorset Lift (Installations) Limited | Broadstone | 2009 |
| Dorset Luxury Toilets Ltd. | Salisbury | 2015 |
| Dorset Marketing Ltd | Dorchester | 2002 |
| Dorset Money Ltd | Verwood | 2021 |
| Dorset Occupational Health Ltd | Poole | 2014 |
| Dorset Showhomes Ltd | Bury St. Edmunds | 2016 |
| Dorset Skips Limited | Wimborne | 2009 |
| Dorset Soils Limited | Wimborne | 2016 |
| Dorset Street (Blandford Forum) Management Company Limited | Wimborne | 1999 |
| Dorset UK Ltd | Saffron Walden | 2018 |
| Dorset Water Centre Ltd | Dorchester | 2021 |
| Dorset Web Limited | Poole | 2001 |
| Dorville Limited | Kates Hill Dudley | 1984 |
| Dorward Electrical Services Limited | Dundee | 2014 |
| DOS Lunas Cosmetic Co., Limited | Beckenham | 2018 |
| Dos-Invest Ltd | Leicester | 2015 |
| Dose Magazine Ltd | East Boldon | 2021 |
| Dosopro Ltd | London | 2024 |
| Dosthill Land Limited | Birmingham | 2009 |
| DOT & Cross Limited | London | 2013 |
| DOT COM Brands Limited | Seaford | 2009 |
| DOT Ingenuity ( Web and Social Media) Limited | Bromley | 2014 |
| DOT London Ltd | London | 2007 |
| DOT2DOT International Limited | Mansfield | 2002 |
| Dotcom (Essex) Limited | Leigh On Sea | 1999 |
| Dotcom Limited | Harrogate | 2011 |
| Doto International Trade Ltd | Beckenham | 2017 |
| Dotpost Ltd | Radstock | 1987 |
| Dotties Desserts Blackpool Limited | Blackpool | 2021 |
| Dottore Commercialista Ltd | London | 2012 |
| Dottori Commercialisti Ltd | London | 2016 |
| Dottridge Brothers Limited | Sutton Coldfield | 1982 |
| Dotty Dungarees Ltd | London | 2025 |
| Dotup Limited | Farnham | 2007 |
| Double Ace Investments Limited | London | 2011 |
| Double ACT Limited | London | 2009 |
| Double Hight Ltd | Beckenham | 2021 |
| Double SIX Enterprise Limited | Sudbury | 2014 |
| Double Stitches Limited | London | 2020 |
| Double Stone Steel Ltd | London | 2014 |
| Double Stone UK Ltd | Wimbledon | 2014 |
| Double Tech International Limited | Cardiff | 2021 |
| Double Vision Productions Limited | London | 2014 |
| Doubled Group Limited | Manchester | 2016 |
| Doublefit Ltd | London | 2024 |
| Doublelimit-Tooling Industrial Co., Ltd | Cambridge | 2013 |
| Doublet Property Services Limited | Cardiff | 1986 |
| Doubletide Limited | London | 1998 |
| Doudou Cissokho Limited | Brighton | 2024 |
| Dougal Properties Limited | Manchester | 2008 |
| Dougalston Limited | London | 2005 |
| Dough Trading Limited | Writtle | 2005 |
| Doughpamine Events Company Ltd | Neston | 2023 |
| Doughty Street Chambers Services Limited | London | 2020 |
| Dougie's Pets Limited | Leeds | 2018 |
| Douglas and Simmons Property Sales Limited | Wantage | 2016 |
| Douglas Avenue RTM Company Limited | Dorset | 2007 |
| Douglas Berry Limited | Harrogate | 2026 |