| Daria Trans 11 Ltd | Transport & logistics | 2019 |
| Darilavmed Ltd | Health & social care | 2024 |
| Dark Kitchen Roosters Limited | Wholesale & retail | 2024 |
| Dark Moon Clothing Ltd | Wholesale & retail | 2017 |
| Darker Towers Ltd | Hospitality | 2019 |
| Darkstone Property Limited | Agriculture & fishing | 2002 |
| Darkwater Homes Limited | Construction | 2017 |
| Darkwater Limited | Professional & scientific | 2009 |
| Darlingtons Estate Management Ltd | Households | 2025 |
| Darminder Singh Ltd | Construction | 2021 |
| Darnayson Ltd | Professional & scientific | 2013 |
| Darpiech Ltd | Transport & logistics | 2015 |
| Darren Hunt Services Limited | Construction | 2023 |
| Darrob Air Holding Limited | Financial services | 2022 |
| Dart Aviation Detailing Ltd | Administrative & support | 2025 |
| Dart Marina Hotel Limited | Hospitality | 1966 |
| Dart Marina Limited | Hospitality | 2001 |
| Dartford BOW Arrow (Management Company) Limited | Households | 2001 |
| Dartmouth Contemporary Limited | Arts & recreation | 2010 |
| Dartnell Investments Ltd | Administrative & support | 2010 |
| Darton Chine Limited | Professional & scientific | 2021 |
| Darvishi European Market Ltd | Wholesale & retail | 2025 |
| Darwins IFA Limited | Financial services | 2005 |
| Dary Transport & Logistics Ltd | Transport & logistics | 2020 |
| DAS Audio Ltd | Other services | 2019 |
| DAS Boot Ltd | Wholesale & retail | 2014 |
| DAS Logistics Ltd | Construction | 2019 |
| DAS Total Services Ltd | Construction | 2024 |
| Dash Homes Limited | Real estate | 2019 |
| Dason Construction Ltd | Construction | 2019 |
| Dass Commercials Ltd | Wholesale & retail | 2012 |
| Data Akkadian Ltd | Information & communication | 2022 |
| Data Design Services Limited | Information & communication | 1988 |
| Data Revival Ltd | Information & communication | 2022 |
| Data Stats Limited | Information & communication | 2025 |
| Data-Sense Analytics Ltd | Information & communication | 2014 |
| Dataday Consultants Limited | Information & communication | 1990 |
| Datalan Installations Limited | Information & communication | 2000 |
| Datanest Limited | Information & communication | 2025 |
| Datastate Services Limited | Administrative & support | 2017 |
| Datatech Ltd | Construction | 1998 |
| Datatel Fiber Ltd | Information & communication | 2023 |
| Date Locally Limited | Other services | 2026 |
| Datum Technologies Limited | Information & communication | 2022 |
| Dauntless Credit Management Limited | Administrative & support | 2016 |
| DAV 8 Ltd | Wholesale & retail | 2024 |
| Dave Eastman Construction Limited | Construction | 2003 |
| Dave Freeman Marine Limited | Manufacturing | 1999 |
| Dave Rushen Reptiles Ltd | Agriculture & fishing | 2017 |
| Davencourt Limited | Households | 1987 |
| David & Dennis Limited | Construction | 2018 |
| David Aguiar Ltd | Health & social care | 2020 |
| David Aldridge Yacht Ropes & Rigging Ltd | Other services | 2022 |
| David Alison Limited | Arts & recreation | 2018 |
| David Bowler & Sons Limited | Manufacturing | 1965 |
| David Christopher Price Holdings Limited | Financial services | 2013 |
| David Ebbs Plumbing and Heating Ltd | Construction | 2025 |
| David Ebert LLP | | 2011 |
| David Edward Bailey Ltd | Extraterritorial | 2025 |
| David Gausden Architects Limited | Professional & scientific | 2026 |
| David Ghotra Ltd | Wholesale & retail | 2021 |
| David James Fabrications & Welding Ltd | Manufacturing | 2013 |
| David Marina Bakery Ltd | Manufacturing | 2025 |
| David Mihail Ltd | Transport & logistics | 2019 |
| David Newell Consultancy Limited | Professional & scientific | 2006 |
| David Ponting Commercials Limited | Wholesale & retail | 2004 |
| David Price Commercial Property Limited | Real estate | 2013 |
| David Price Homes Limited | Construction | 2013 |
| David Price Real Estate Ltd | Extraterritorial | 2013 |
| David Radford Clinical Services Ltd. | Professional & scientific | 2016 |
| David Richards Engineering Limited | Manufacturing | 1989 |
| David Roath Employment Solutions Limited | Administrative & support | 2025 |
| David ROE Projects Limited | Construction | 2018 |
| David Self Limited | Extraterritorial | 2007 |
| David Wesley Electrical Services Limited | Manufacturing | 2014 |
| David's JAM Limited | Hospitality | 2025 |
| Davie Holdings Ltd | Financial services | 2024 |
| Davies Associates Management Ltd | Professional & scientific | 2013 |
| Davies Core Ltd | Information & communication | 2023 |
| Davies International Transport Limited | Transport & logistics | 1994 |
| Davies Investment Properties Limited | Real estate | 2019 |
| Davikatz Limited | Hospitality | 2024 |
| Davy Marine Design Ltd | Professional & scientific | 2022 |
| Davy Technology Ltd | Professional & scientific | 2024 |
| DAW Construction Management Limited | Construction | 2018 |
| Dawck Family Ventures Ltd | Wholesale & retail | 2026 |
| Dawn and Nithya Ltd | Public administration | 2023 |
| Dawn Lambert Research Limited | Professional & scientific | 2011 |
| Dawn-Solace Limited | Health & social care | 2025 |
| Dawnbond Limited | Real estate | 1983 |
| DAX Professionals Ltd | Professional & scientific | 2005 |
| DAX Ventures Limited | Financial services | 2019 |
| Dayal Properties Ltd | Real estate | 2020 |
| Dayglow Lighting Ltd | Construction | 2018 |
| Days Pharma Ltd | Wholesale & retail | 2023 |
| Daysh & Sons Limited | Manufacturing | 2015 |
| Daysprings Healthcare Limited | Health & social care | 2022 |
| Dazzle Luxe Events Limited | Other services | 2026 |
| DB Elite Performance Ltd | Arts & recreation | 2025 |
| DB Enterprises Southern Ltd | Wholesale & retail | 2022 |