| Darpan Limited | Wholesale & retail | 2025 |
| Darras Asset Management Limited | Financial services | 2011 |
| Darras Consulting Limited | Financial services | 2007 |
| Darras Developments Limited | Construction | 2021 |
| Darras Estates Limited | Construction | 2016 |
| Darras Group Limited | Real estate | 2022 |
| Darras Hall Estate Trustees Limited | Real estate | 2015 |
| Darras Hall Hair Lounge Limited | Other services | 2015 |
| Darras Hall Laser Clinic Ltd | Other services | 2026 |
| Darras Health LLP | | 2022 |
| Darras Property Co Ltd | Real estate | 2023 |
| Darryn Wilson Engineering Services Ltd | Manufacturing | 2026 |
| Dart Haulage Limited | Transport & logistics | 2026 |
| Dartcap LP | | 2017 |
| Dartmoor Pony Society | Agriculture & fishing | 1996 |
| Darwin Creative Design Ltd | Information & communication | 2012 |
| Dash Media Ltd | Information & communication | 2020 |
| Dashio Ltd | Transport & logistics | 2025 |
| Dasmed Limited | Other services | 2021 |
| Data Active Consultancy Limited | Information & communication | 1998 |
| Data Architects Ltd | Information & communication | 2007 |
| Data Driven Services Ltd | Information & communication | 2026 |
| Data Fire and Security LLP | | 2011 |
| Data Fire and Security Services Limited | Administrative & support | 2021 |
| Data Shigoto Limited | Professional & scientific | 2021 |
| Databyts IT Services Ltd | Information & communication | 2012 |
| Datadex Ltd | Information & communication | 2025 |
| Datalifeline Europe Limited | Information & communication | 2009 |
| Datanet Global Limited | Wholesale & retail | 2025 |
| Datasupplies (Stationery) Limited | Manufacturing | 1980 |
| Datic Limited | Real estate | 2022 |
| Datsusara Capital Management Ltd | Professional & scientific | 2025 |
| Datt Micro Ltd | Wholesale & retail | 2011 |
| Datum Build Limited | Construction | 2018 |
| Daud Brothers Limited | Manufacturing | 2011 |
| Davall Technology Limited | Information & communication | 2018 |
| Davanti Classic-Station (HSG) Limited | Hospitality | 2020 |
| Dave Bowman Recruitment Limited | Administrative & support | 2020 |
| Dave Durie Ltd | Information & communication | 2010 |
| Dave Forrest Consultancy Ltd | Professional & scientific | 2014 |
| Dave Turner Properties Ltd | Real estate | 2025 |
| Dave Wright Consultancy Limited | Professional & scientific | 2019 |
| Davel Limited | Health & social care | 2002 |
| Daventrycomputer Ltd. | Transport & logistics | 2019 |
| Davey Commissioning Services Ltd | Professional & scientific | 2021 |
| Daviclean Ltd Ltd | Administrative & support | 2025 |
| David Biggins Welding Services Ltd | Construction | 2023 |
| David Bretton Limited | Health & social care | 2023 |
| David Bretton Property Limited | Real estate | 2024 |
| David Bruce HSE Ltd | Professional & scientific | 2012 |
| David Carr Limited | Professional & scientific | 2002 |
| David Convery Driving Tuition Limited | Education | 2010 |
| David Dorn Limited | Financial services | 2018 |
| David Dowley Limited | Wholesale & retail | 2000 |
| David Graham Events Ltd | Professional & scientific | 2024 |
| David Gray Solicitors LLP | | 2011 |
| David H Morley LLP | | 2017 |
| David Harvey Limited | Other services | 1995 |
| David Hutchinson Energies Limited | Professional & scientific | 2023 |
| David James Limited | Wholesale & retail | 2007 |
| David Jarvis Limited | Health & social care | 1999 |
| David Johnson Overhead Lines Ltd | Construction | 2013 |
| David Michael Procter Ltd | Extraterritorial | 2025 |
| David Prior H V Electricals Ltd | Energy | 2017 |
| David Ring Ltd | Financial services | 2009 |
| David Sainsbury Plastic Surgery Ltd | Health & social care | 2026 |
| David Summerfield Limited | Wholesale & retail | 1947 |
| David Tiernan Limited | Other services | 2022 |
| David Warren Advisory Ltd | Professional & scientific | 2026 |
| David Webster Limited | Extraterritorial | 1968 |
| David Wilson Property Ltd | Real estate | 2021 |
| David Young Therapies Ltd | Health & social care | 2025 |
| Davidson Consultants Limited | Professional & scientific | 2011 |
| Davidson of Darras Hall Ltd | Wholesale & retail | 2020 |
| Davidsons Dairy Ltd. | Wholesale & retail | 2011 |
| Davidson’S Direct Dining Ltd | Hospitality | 2025 |
| Davies Woodforth Limited | Professional & scientific | 2014 |
| Davis Health and Fitness Ltd | Arts & recreation | 2017 |
| Davison Blade Repair Ltd | Other services | 2019 |
| Davison Contracts Limited | Construction | 2005 |
| Davison Creative Ltd | Professional & scientific | 2016 |
| Davison Haulage Limited | Transport & logistics | 2011 |
| Davison Labour Supply Limited | Construction | 2012 |
| Davison Media Limited | Information & communication | 2016 |
| Davmar (Keswick) LLP | | 2023 |
| Davric Equipment Limited | Wholesale & retail | 1980 |
| Dawari Solutions Ltd | Water & waste | 2023 |
| Dawat Foods Limited | Wholesale & retail | 2024 |
| Dawath Kitchen Limited | Hospitality | 2026 |
| Dawkins DJ Ltd | Arts & recreation | 2021 |
| Dawn Estates Limited | Real estate | 2004 |
| Dawn Parkin Solutions Limited | Professional & scientific | 2009 |
| Dawson & Sanderson Limited | Administrative & support | 1962 |
| Day Day UP (NE) Ltd | Hospitality | 2017 |
| Day DOT Productions Ltd | Information & communication | 2009 |
| Day for Night Film & Visual Arts Ltd | Information & communication | 2006 |
| Day Software Limited | Information & communication | 2022 |
| Day& Night Express Ltd | Wholesale & retail | 2018 |
| Daybell Services Limited | Administrative & support | 2017 |
| Dayes Kenyon Associates Limited | Professional & scientific | 2005 |