| D. Price & Associates Limited | Manufacturing | 1985 |
| D.F.Brennan Associates Limited | Information & communication | 2014 |
| D.G.Shaw Limited | Wholesale & retail | 1963 |
| D.J. Flooring (Midlands) Limited | Construction | 2014 |
| D.J.L.(Sutton) Limited | Construction | 2014 |
| D.M.G. Food Products Limited | Real estate | 1979 |
| D2 Renovation Ltd | Real estate | 2020 |
| D3N Holdings Ltd | Information & communication | 2017 |
| D5 Construction Ltd | Construction | 2020 |
| D5 Developments Ltd | Construction | 2021 |
| DA Laserclinic Ltd | Health & social care | 2022 |
| DAA Dial Accident Assist Ltd | Administrative & support | 2025 |
| DABS1844 Limited | Manufacturing | 2019 |
| Dacic Ltd | Hospitality | 2019 |
| Dacres Boxing Limited | Arts & recreation | 2021 |
| Dacta Design and Property Ltd | Construction | 2007 |
| DAE Consultancy Limited | Professional & scientific | 2025 |
| DAH Automotive Consulting Ltd | Professional & scientific | 2023 |
| DAH Properties Ltd | Households | 2024 |
| Daic Solutions Limited | Wholesale & retail | 2023 |
| Daihatsu Vehicle Distributors Limited | Wholesale & retail | 2000 |
| Daily Bread Investment Company Limited | Real estate | 2021 |
| Daily Rate Ltd | Administrative & support | 2024 |
| Dainty Consulting Limited | Professional & scientific | 2020 |
| Dainty Property Limited | Hospitality | 2025 |
| Dairy Close Limited | Extraterritorial | 2013 |
| Daisy Coco Limited | Other services | 2019 |
| Daisy Dixon Properties Ltd | Real estate | 2022 |
| Daitech Solutions Holdings Limited | Financial services | 2023 |
| Daitech Solutions Limited | Other services | 2022 |
| Daivya Properties Limited | Real estate | 2022 |
| Dakin (Holdings) Limited | Financial services | 2002 |
| Dale & Daughters Removals & Storage Limited | Extraterritorial | 2010 |
| Dales and Moors Developments Ltd | Real estate | 2020 |
| Daleswood Aesthetics Limited | Health & social care | 2023 |
| Daleswood Health Ltd | Health & social care | 2015 |
| Daltar Services Limited | Financial services | 2023 |
| Dalton Construction (Solihull) Ltd | Construction | 2011 |
| Dalton Estate Agents Ltd | Real estate | 2025 |
| Dalvision Limited | Information & communication | 2025 |
| Damar Security Systems Limited | Administrative & support | 2011 |
| Damian Sweeps Ltd | Administrative & support | 2017 |
| Damian Sweeps Services Limited | Water & waste | 2013 |
| Damien Walsh Consulting Services Ltd | Professional & scientific | 2018 |
| Damp and Mouldfix Ltd | Construction | 2022 |
| Damson Carpentry Ltd | Manufacturing | 2023 |
| Damson Developments Limited | Construction | 2021 |
| Damson Grove Ltd | Real estate | 2018 |
| Damson in Bloom Ltd | Wholesale & retail | 2019 |
| Damson Specialist Surfacing Ltd | Construction | 2021 |
| Damson Wood Property Solutions Ltd | Real estate | 2025 |
| Damsonwood Kennels and Cattery Ltd | Other services | 2019 |
| DAN Makes Films Ltd | Information & communication | 2023 |
| DAN Morrissey Ltd | Information & communication | 2021 |
| DAN Testing Consultancy Limited | Professional & scientific | 2018 |
| DAN1315 Limited | Health & social care | 2024 |
| Danang Capital Limited | Construction | 2023 |
| Danascus Ltd | Wholesale & retail | 2024 |
| Dancas Homes Limited | Construction | 2007 |
| Dance and Beats Ltd | Arts & recreation | 2020 |
| Dandi Transport Services Ltd | Transport & logistics | 2026 |
| Danford Solutions Ltd | Professional & scientific | 2016 |
| Daniel Caulfield Ltd | Health & social care | 2020 |
| Daniel Delgado Limited | Other services | 2018 |
| Daniel J Simmonds Law Ltd | Professional & scientific | 2024 |
| Daniel James Property Limited | Real estate | 2016 |
| Daniel Jefferson Limited | Professional & scientific | 2008 |
| Daniel John Engineering Ltd | Construction | 2026 |
| Daniela&Ovi Ltd | Health & social care | 2019 |
| Danielle Court Management Company Limited | Households | 1995 |
| Daniels Rich Limited | Professional & scientific | 2013 |
| Danilo Mazic Limited | Wholesale & retail | 2020 |
| Danka Enterprise Ltd | Wholesale & retail | 2020 |
| Danzey Farm Developments LLP | | 2021 |
| Danzey Ltd | Real estate | 2019 |
| Dappledark Studios Limited | Information & communication | 2018 |
| DAR Civils Ltd | Construction | 2019 |
| DAR Corporations Ltd | Wholesale & retail | 2017 |
| Darby Keye Property Limited | Real estate | 1990 |
| Dare Professional Audio Limited | Other services | 2010 |
| Dark Matter Fitness Holdings Limited | Financial services | 2025 |
| Dark Matter Fitness One Limited | Arts & recreation | 2025 |
| Darkenheit Publishing Ltd | Information & communication | 2023 |
| Darq Ltd | Information & communication | 2025 |
| Darren Coates Limited | Information & communication | 2014 |
| Darren COX Lighting Cameraman Limited | Information & communication | 2020 |
| Dartford Property Group Limited | Real estate | 2021 |
| Darwent Properties Limited | Real estate | 2004 |
| Dass Delivery Ltd | Transport & logistics | 2025 |
| Data and Security Systems Ltd | Construction | 2010 |
| Database Design (UK) Limited | Information & communication | 2002 |
| Datainfo Limited | Information & communication | 2018 |
| Datan Consultancy Limited | Professional & scientific | 2011 |
| Datar Limited | Administrative & support | 2002 |
| Dating Carbon Limited | Professional & scientific | 2021 |
| Datomec Design Limited | Arts & recreation | 1994 |
| Dave Green Gardens Ltd | Professional & scientific | 2017 |
| Daventry International Rail Freight Terminal Limited | Real estate | 1990 |
| Daventry Rail Port Limited | Real estate | 1994 |
| David Aldulaimi Limited | Health & social care | 2019 |