| DLT Services Ltd | Professional & scientific | 2011 |
| DM Consults Ltd | Professional & scientific | 2025 |
| DM Farriers Ltd | Professional & scientific | 2014 |
| DMI Dobbie Mcinnes Limited | Manufacturing | 2007 |
| Dmsg Ltd | Hospitality | 2025 |
| DMW Legal Consulting Limited | Professional & scientific | 2025 |
| DNA Sameday Transport Ltd | Transport & logistics | 2026 |
| DND Farming Ltd | Agriculture & fishing | 2019 |
| DNF Club Ltd | Wholesale & retail | 2025 |
| DNS Healthcare Limited | Administrative & support | 2018 |
| Doal Food & News Limited | Wholesale & retail | 2009 |
| Dobson Brickworks Limited | Construction | 2008 |
| Dodd Construction Ltd | Construction | 2018 |
| Dodd Engineering Services Ltd | Construction | 2021 |
| Doddy's Soft Play Cafe Ltd | Hospitality | 2025 |
| Doggie Style Store Limited | Wholesale & retail | 2011 |
| Dogs & Puppies of the Rise Limited | Agriculture & fishing | 2021 |
| Dogzilla PUB Company Ltd | Administrative & support | 2016 |
| Doit Info Technology Ltd | Wholesale & retail | 2021 |
| Dolia Collectables Limited | Wholesale & retail | 2007 |
| Dollar Sourcing Ltd. | Extraterritorial | 2014 |
| Dollis Hill Garage (MOT Centre) Limited | Wholesale & retail | 2011 |
| Dollis Hill Garage Ltd | Wholesale & retail | 2015 |
| Domain-Saas Ltd | Wholesale & retail | 2025 |
| Domestic & Commercial Plumbing & Heating Ltd | Construction | 2009 |
| Donia Trading Co., Limited | Wholesale & retail | 2024 |
| Donkey Education and Relaxation in Staffordshire (Donkey E.A.R.S) CIC | Education | 2024 |
| Dope Signs Limited | Professional & scientific | 2021 |
| Doris & Jim's Day Nursery and Pre-School Limited | Education | 2023 |
| Dorothy Choy Limited | Other services | 2017 |
| Dotty Care Ltd | Health & social care | 2023 |
| Double Blue Holdings Ltd | Financial services | 2023 |
| Doucoure Mamadou Trading Co., Ltd | Wholesale & retail | 2024 |
| Dough My Gosh Ltd | Hospitality | 2023 |
| Doughty Investments Limited | Construction | 2014 |
| Doughty Properties Limited | Real estate | 2008 |
| Dourish & Day (Whitchurch) Limited | Real estate | 2013 |
| Dourish & Day Holdings Limited | Financial services | 2024 |
| Dourish & Day Limited | Real estate | 2017 |
| Dourish and Day Lettings Limited | Real estate | 2017 |
| Dovehouse Court Management Limited | Households | 2008 |
| Doves Care & Support Limited | Health & social care | 2016 |
| Doyles Irish Bars Ltd | Hospitality | 2026 |
| DP Tendering Services Ltd | Professional & scientific | 2026 |
| DPH Motorsport Ltd | Wholesale & retail | 2016 |
| DPJ PHG Limited | Construction | 2018 |
| DQA Training Ltd | Education | 2024 |
| DR Ediela Iliescu Ltd | Health & social care | 2024 |
| DR Natalie Byrne Clinical Psychology Ltd | Health & social care | 2024 |
| DR Outlet Ltd | Wholesale & retail | 2025 |
| Draeh Ltd | Information & communication | 2025 |
| Dragon Bridge Trading Ltd | Wholesale & retail | 2025 |
| Dragon WIN International Trading Co., Limited | Professional & scientific | 2012 |
| Drakesmith Associates Ltd | Professional & scientific | 2014 |
| Drakesmith Investments Limited | Financial services | 2021 |
| Drbammens Limited | Information & communication | 2021 |
| Dreamluxe Properties Ltd | Real estate | 2025 |
| Dreamwood Park Ltd | Hospitality | 2025 |
| Dressmyhorse Ltd | Information & communication | 2017 |
| Drink Dawny Limited | Manufacturing | 2025 |
| Driving Test Expert Ltd | Information & communication | 2026 |
| DRP Electrical and Mechanical Services Limited | Manufacturing | 2018 |
| DRP Property and Investment Limited | Households | 2019 |
| DRU Property Limited | Real estate | 2018 |
| DS Resolutions Limited | Extraterritorial | 2025 |
| DS Roofing Staffordshire Ltd | Construction | 2025 |
| DSA Spaces Ltd | Real estate | 2025 |
| DSA Transport Solutions Limited | Transport & logistics | 2003 |
| Dsna Limited | Professional & scientific | 2022 |
| Dsph Limited | Professional & scientific | 2021 |
| DSR Advisory Ltd | Professional & scientific | 2025 |
| DT Engine Solution Ltd | Manufacturing | 2016 |
| DTB Construction Ltd | Construction | 2025 |
| DTC Frontier Partners Limited | Wholesale & retail | 2025 |
| Dualistic Systems Limited | Information & communication | 2025 |
| Dummy Acre Ltd | Other services | 2024 |
| Dunamiz Distribution Ltd | Wholesale & retail | 2025 |
| Dunbar Property Consultancy Ltd | Professional & scientific | 2023 |
| Duncan and Pollock Ltd | Hospitality | 2022 |
| Dunham Mccarthy Financial Services Ltd | Financial services | 2012 |
| Dunham Mccarthy Limited | Financial services | 2011 |
| Dunning Properties Ltd | Real estate | 2020 |
| Dunnings (Brixton) Ltd | Hospitality | 2026 |
| Dunnings (Farringdon) Ltd | Hospitality | 2026 |
| Dunnings (Fetter Lane) Limited | Hospitality | 2025 |
| Dunnings (Hootananny) Ltd | Hospitality | 2025 |
| Dunnings (Mansfield) Limited | Hospitality | 2024 |
| Dunnings (Marylebone) Limited | Hospitality | 2025 |
| Dunnings (Monks) Limited | Hospitality | 2025 |
| Dunnings (Preston Road) Ltd | Hospitality | 2022 |
| Dunnings (Putney) Limited | Hospitality | 2025 |
| Dunnings (Reading) Ltd | Hospitality | 2026 |
| Dunnings (ST Albans Road) Ltd | Hospitality | 2022 |
| Dunnings (Stevenage) Limited | Hospitality | 2025 |
| Dunnings (Warrengate Road) Ltd | Hospitality | 2022 |
| Dunnings (Watford) Limited | Hospitality | 2025 |
| Dunnings (Woking) Limited | Hospitality | 2024 |
| Dunnings Freehouse N2 Ltd | Hospitality | 2022 |
| Dunston Business Village Limited | Real estate | 2005 |
| Dunston Village Hall Limited | Arts & recreation | 2011 |