| DRY Property Ltd | Construction | 2023 |
| Dryd Limited | Manufacturing | 2025 |
| Drywall & Ceilings Precision Ltd | Construction | 2018 |
| Drywall Industry Ltd | Construction | 2022 |
| Drzen Ltd | Health & social care | 2022 |
| DS & KS Investments Ltd | Real estate | 2018 |
| DS Glass and Fittings Ltd | Construction | 2024 |
| DS Kelly Services Limited | Construction | 2016 |
| DS Painting Property Care Ltd | Administrative & support | 2026 |
| DS Property Ventures Limited | Real estate | 2021 |
| DS Rail Limited | Construction | 2015 |
| DS Sealants Ltd | Construction | 2014 |
| DS Tiles Limited | Construction | 2020 |
| DS Trading Cards Ltd | Wholesale & retail | 2024 |
| DS UK Investments Limited | Financial services | 2020 |
| DS Windows Ltd | Construction | 2012 |
| Ds&Co Limited | Real estate | 2026 |
| DS2BSQUARED Limited | Administrative & support | 2013 |
| DS9 Sport Ltd | Arts & recreation | 2024 |
| DSA Translations Ltd | Professional & scientific | 2018 |
| DSC Associates (UK) Ltd | Professional & scientific | 2021 |
| DSD Capital Ltd | Professional & scientific | 2015 |
| DSG Plumbing Limited | Construction | 2025 |
| DSK MED Ltd | Professional & scientific | 2022 |
| DSN Roofing Solutions Limited | Construction | 2020 |
| Dsouza & Khattri Group Limited | Construction | 2026 |
| DSP Group London Limited | Wholesale & retail | 2013 |
| DSP Investment Group Ltd | Real estate | 2017 |
| DSP Property UK Limited | Construction | 2018 |
| DSR Finance Limited | Professional & scientific | 2022 |
| DSR Portfolio Limited | Real estate | 2021 |
| DSR Services UK Ltd | Real estate | 2024 |
| Dssc Limited | Real estate | 2022 |
| Dstrkt London Ltd | Extraterritorial | 2012 |
| DT 1947 Ltd | Other services | 2014 |
| DT Group Holdings Limited | Financial services | 2022 |
| DT Hughes Services Ltd | Administrative & support | 2018 |
| DT Logix Limited | Transport & logistics | 2016 |
| DT MED Limited | Professional & scientific | 2010 |
| DT TV Limited | Information & communication | 2026 |
| DTP Logistics Limited | Transport & logistics | 2010 |
| Dtpp Ltd | Real estate | 2023 |
| Dtrend Ltd | Other services | 2022 |
| DTS & W Construction Ltd | Construction | 2017 |
| DTS Commercial Limited | Real estate | 2022 |
| DTS FAM Limited | Wholesale & retail | 2025 |
| DTS Family Limited | Wholesale & retail | 2025 |
| DTS Groupp Limited | Wholesale & retail | 2025 |
| DTS Parivar Limited | Wholesale & retail | 2025 |
| DTS Property Ltd | Construction | 2018 |
| DTS Property Subco Limited | Real estate | 2021 |
| DU & MH Limited | Real estate | 2022 |
| DU Vinage Publishing Ltd | Administrative & support | 2007 |
| Du-Shesh Kebab Ltd | Real estate | 2023 |
| Dua-E-Zahra Ltd | Administrative & support | 2024 |
| Dual Sphere UK Limited | Professional & scientific | 2025 |
| Dualea Ltd | Wholesale & retail | 2025 |
| Duality Property Group Limited | Real estate | 2025 |
| Dubicom Limited | Information & communication | 2002 |
| Duchy Orthopaedics Limited | Health & social care | 2021 |
| Ducit Ltd | Real estate | 2022 |
| Dudley Oaks Limited | Health & social care | 2023 |
| Duduta Construction Ltd | Construction | 2025 |
| DUE Care Recruitment Limited | Administrative & support | 2019 |
| Duggu Limited | Wholesale & retail | 2016 |
| Duhonyi Relocation Ltd | Transport & logistics | 2013 |
| Duke Godley Financial Planning Limited | Financial services | 1988 |
| Dulverton Limited | Construction | 1984 |
| Dulwich Rehab Ltd | Real estate | 2010 |
| Dulwich Rehab Properties Limited | Real estate | 2019 |
| DUM Properties Limited | Real estate | 2018 |
| Duma Solutons Ltd | Wholesale & retail | 2022 |
| Dumandwokhouse Ltd | Hospitality | 2026 |
| Dumitru Buzuleac Ltd | Construction | 2026 |
| Dunaa Ltd | Wholesale & retail | 2024 |
| Duncombe Developments Limited | Construction | 1962 |
| Duncombeworth Holdings LLP | | 2024 |
| Dundee Wharf Management Limited | Households | 1996 |
| Dune Corporation Ltd | Real estate | 2021 |
| Dune Storm Limited | Transport & logistics | 2016 |
| Dunelm FAR East Limited | Wholesale & retail | 2015 |
| Dunia XR Ltd | Information & communication | 2023 |
| Dunkley Holdings Ltd | Administrative & support | 2023 |
| Dunmat Limited | Real estate | 2022 |
| Dunnage & Larkin Limited | Arts & recreation | 2010 |
| Dunning Ltd | Water & waste | 2015 |
| Dunning Waste Management Ltd | Water & waste | 2015 |
| Dunsin Consult Limited | Information & communication | 2022 |
| Dunya Markets Limited | Other services | 2023 |
| Durande Limited | Information & communication | 2025 |
| Durands Wharf Management Co. Limited | Households | 2001 |
| Durga and Sons Ltd | Wholesale & retail | 2019 |
| Durvam Global Ltd | Professional & scientific | 2026 |
| DUS Investment Limited | Real estate | 2021 |
| Dusa Studio Ltd | Professional & scientific | 2024 |
| Dusara Limited | Financial services | 2023 |
| Dush (Sound Unit) Limited | Information & communication | 1997 |
| DUSK2DAWN Stays Ltd | Real estate | 2022 |
| Dusken Group Ltd | Administrative & support | 2025 |
| Duss Limited | Real estate | 2013 |