| David Banes Access and Inclusion Services Limited | Professional & scientific | 2016 |
| David Brackenbury Associates Limited | Professional & scientific | 2006 |
| David Brown and Company Limited | Real estate | 2011 |
| David Dees Limited | Administrative & support | 2013 |
| David Down Sports Therapy Limited | Health & social care | 2018 |
| David Doyle Consultancy Limited | Professional & scientific | 2000 |
| David Haggan Structures Ltd | Professional & scientific | 2021 |
| David Lawlor Tennis Limited | Arts & recreation | 2006 |
| David Lock Associates Limited | Administrative & support | 1989 |
| David Nicholson Design Limited | Professional & scientific | 2013 |
| David Ogle Property Ltd | Real estate | 2019 |
| David Penn Limited | Arts & recreation | 2010 |
| David Pinder Wealth Management Limited | Financial services | 2013 |
| David Preston Editing Ltd | Information & communication | 2014 |
| David Russell Bespoke Builders Ltd | Construction | 2014 |
| David Seymour Consultancy Limited | Professional & scientific | 2024 |
| David Vlad Limited | Construction | 2026 |
| David's Childhood Desserts Ltd | Manufacturing | 2021 |
| Davimor Property Partnership Limited | Real estate | 2020 |
| Daviscomms UK Limited | Information & communication | 2006 |
| Davlaw Solutions Ltd | Administrative & support | 2016 |
| Davmon Ltd | Construction | 2022 |
| Dawaah Limited | Hospitality | 2018 |
| Dawn Mcmorrow Ltd | Real estate | 2021 |
| Dawn Turpin Consulting Ltd | Professional & scientific | 2019 |
| Dawson Auto Developments Limited | Transport & logistics | 2008 |
| Dawson Auto Developments Sales Limited | | 1981 |
| Dawson Construction Plant Limited | Manufacturing | 1972 |
| Dawson Contract Piling Limited | Construction | 2008 |
| Dawson Road Limited | Extraterritorial | 2013 |
| Dawsongroup BUS and Coach Limited | Administrative & support | 1989 |
| Dawsongroup Energy Solutions Limited | Administrative & support | 2022 |
| Dawsongroup Environmental Municipal Civil Limited | Administrative & support | 2006 |
| Dawsongroup Finance Limited | Financial services | 1997 |
| Dawsongroup Global Limited | Extraterritorial | 2020 |
| Dawsongroup International Limited | Professional & scientific | 1995 |
| Dawsongroup Limited | Professional & scientific | 1985 |
| Dawsongroup Material Handling Limited | Administrative & support | 1991 |
| Dawsongroup Portable Cold Rooms Limited | Professional & scientific | 1983 |
| Dawsongroup Temperature Control Solutions Limited | Administrative & support | 1982 |
| Dawsongroup Temporary Kitchens Limited | Professional & scientific | 1987 |
| Dawsongroup Truck and Trailer Limited | Administrative & support | 1995 |
| Dawsongroup UK Limited | Professional & scientific | 1948 |
| Dawsongroup Van Sales Limited | Professional & scientific | 2012 |
| Dawsongroup Vans Limited | Administrative & support | 2010 |
| Dawsons Accountants Limited | Professional & scientific | 2015 |
| Dawsons Electrical Limited | Construction | 2015 |
| Day One Talent Solutions Ltd | Information & communication | 2022 |
| Day OR Knight-Mk Limited | Construction | 2016 |
| Day Star Property Ltd | Real estate | 2023 |
| Day's Clinics Limited | Health & social care | 2008 |
| Daydreamer VFX Ltd | Information & communication | 2019 |
| Dayesoft Limited | Information & communication | 2009 |
| Daymer Solutions Limited | Professional & scientific | 2025 |
| Daynight Consulting Limited | Professional & scientific | 2006 |
| Dayofflondon Ltd | Wholesale & retail | 2023 |
| Days MK Limited | Wholesale & retail | 2005 |
| Days Pubs Limited | Wholesale & retail | 2011 |
| Dayspring Solutions Limited | Real estate | 2016 |
| Daystar Chidren's Care Homes Ltd | Health & social care | 2025 |
| Dayzee IT Limited | Information & communication | 2021 |
| Dazone Limited | Information & communication | 2016 |
| Dazzle Light Sky Culture Ltd | Information & communication | 2025 |
| DB Enterprisee Ltd | Other services | 2025 |
| DB Forklifts Ltd | Administrative & support | 2024 |
| DB Hire Ltd | Professional & scientific | 2018 |
| DB Opco Ltd | Hospitality | 2023 |
| DB Source Property Ltd | Real estate | 2021 |
| DB Source PVT Ltd | Information & communication | 2012 |
| DB Squared Limited | Administrative & support | 2015 |
| DB Treatment Clinics Ltd | Health & social care | 2023 |
| DBA Trading Services Ltd | Health & social care | 2024 |
| Dbakis Limited | Professional & scientific | 2019 |
| DBC Bucks Ltd | Professional & scientific | 2025 |
| DBC Contracting Limited | Construction | 2007 |
| DBC Services & Renewables Ltd | Construction | 2026 |
| Dbec Consults Limited | Education | 2025 |
| DBG Car Sales Ltd | Wholesale & retail | 2023 |
| DBG Carpets and Flooring Ltd | Construction | 2021 |
| DBJ Housing Limited | Real estate | 2019 |
| DBL Plumbing & Heating Limited | Construction | 2016 |
| DBP UK Investments Limited | Hospitality | 2021 |
| DBR Event Ltd | Hospitality | 2025 |
| Dbrb Limited | Construction | 2023 |
| DBS Agile Solutions Ltd. | Information & communication | 2020 |
| DBT Services Limited | Transport & logistics | 2016 |
| DBU Ltd | Transport & logistics | 2020 |
| DC Action Sports Ltd | Arts & recreation | 2025 |
| DC Automobiles Limited | Wholesale & retail | 1997 |
| DC Global Limited | Administrative & support | 2020 |
| DC Legal and Language Services Limited | Other services | 2014 |
| DC Paint and Refinishing Ltd | Construction | 2026 |
| DC Paint Solutions Limited | Manufacturing | 2018 |
| DC Sun Ltd | Wholesale & retail | 2012 |
| DC Ursu Mechanical Services Ltd | Construction | 2016 |
| DC Wet-Trade Ltd | Construction | 2015 |
| DC2 Properties Limited | Real estate | 2024 |
| DC6 House Limited | Manufacturing | 2024 |
| DCC Concepts Limited | Manufacturing | 2015 |
| DCG Contracts Limited | Construction | 2006 |