| Dara Creations Limited | Wholesale & retail | 2008 |
| Dara Properties Limited | Real estate | 2026 |
| Darius & Daria Ltd | Construction | 2023 |
| Dart Scaffolding Services Limited | Administrative & support | 1997 |
| Dartem Properties Ltd | Real estate | 2024 |
| Darwin GRC Limited | Information & communication | 2026 |
| Daryl Palmer Associates Limited | Administrative & support | 2018 |
| Dase Venture Limited | Wholesale & retail | 2025 |
| Data Cablelink Ltd | Construction | 2026 |
| Dataction Solutions Private Limited | Information & communication | 2025 |
| Datum Source Ltd | Information & communication | 2020 |
| Dave Andrews Limited | Transport & logistics | 2003 |
| Davenant Foundation School | Education | 2011 |
| David Barry London Limited | Manufacturing | 2023 |
| David Carpenter Watch Services Limited | Other services | 2018 |
| David Daniels & Co Limited | Real estate | 1998 |
| David Gough Advisory Ltd | Professional & scientific | 2026 |
| David Ward Properties Limited | Real estate | 2018 |
| Davis & Gold Limited | Construction | 2002 |
| Davis Way Ltd | Real estate | 2015 |
| Daymode Limited | Administrative & support | 1996 |
| DB Land Limited | Construction | 2017 |
| DB Student Properties Limited | Real estate | 2016 |
| Dbip Limited | Education | 2025 |
| DBS Education Limited | Administrative & support | 2026 |
| DBS Homes Group Ltd | Health & social care | 2015 |
| DBS Investment Group Limited | Financial services | 2026 |
| DBS Scaffolding Ltd | Construction | 2020 |
| DBS SEN Limited | Administrative & support | 2026 |
| DBS Temps Limited | Administrative & support | 2026 |
| DBS Tutors Limited | Administrative & support | 2026 |
| DC Data Centres Ltd | Professional & scientific | 2026 |
| DC Design Consulting Ltd | Professional & scientific | 2025 |
| DC Fittings Ltd | Construction | 2014 |
| DCO Construction Limited | Construction | 2024 |
| DD &Service Ltd | Extraterritorial | 2021 |
| DDK Engineering Ltd | Wholesale & retail | 2018 |
| DDS Bright Solutions Ltd | Other services | 2015 |
| Dealbrand Limited | Households | 1996 |
| Dear Property Limited | Real estate | 2024 |
| Debden Design & Construction Limited | Construction | 2014 |
| Debden Nails Ltd | Other services | 2025 |
| Debonaire LDN Limited | Other services | 2020 |
| Deborah Webb (UK) Ltd | Wholesale & retail | 2024 |
| Deeban Contracts Limited | Construction | 2023 |
| Deepadvert Ltd | Manufacturing | 2017 |
| Dega Accountancy Ltd | Professional & scientific | 2022 |
| Dehayen Properties LLP | | 2018 |
| DEL Couriers Ltd | Other services | 2012 |
| Deloris Studio Ltd | Wholesale & retail | 2024 |
| Delta Document Solutions Limited | Manufacturing | 2020 |
| Delta HR Limited | Administrative & support | 2022 |
| Delta Tech Fire Services Limited | Professional & scientific | 2008 |
| Delton Building Co Ltd | Construction | 2015 |
| Deltoro Investments Limited | Real estate | 2020 |
| Denise Davis Limited | Other services | 2015 |
| Dennis Brothers Limited | Wholesale & retail | 2002 |
| Derby Terrace Limited | Administrative & support | 2011 |
| Derma Pro Training Limited | Other services | 2016 |
| Dermal Laboratories Limited | Manufacturing | 1981 |
| Dermal Limited | Professional & scientific | 2011 |
| Design 4 Build Limited | Wholesale & retail | 2020 |
| Design Build (Developments) Ltd | Construction | 2003 |
| Design by Ricki-Lee Limited | Construction | 2016 |
| Design Manage Develop Limited | Administrative & support | 2016 |
| Design Objectives (Holdings) Limited | Professional & scientific | 2006 |
| Desij Ltd | Real estate | 2024 |
| Desog Corp Ltd | Transport & logistics | 2020 |
| Deuce 15 Limited | Real estate | 2023 |
| Deuce Limited | Information & communication | 2008 |
| Devco Consulting Limited | Information & communication | 2005 |
| Development Finance (Marylebone) Limited | Financial services | 2019 |
| Devhold Limited | Real estate | 2020 |
| Devi (London) Properties Limited | Extraterritorial | 2019 |
| Devine Flooring Ltd. | Construction | 2016 |
| Devita Cleaning Service Ltd | Administrative & support | 2022 |
| Dewspill Limited | Real estate | 2014 |
| DG85 Builders Ltd | Construction | 2023 |
| DGS Partners Limited | Professional & scientific | 2026 |
| DH Beauty Limited | Financial services | 2026 |
| Dhallu Trustees Limited | Administrative & support | 2022 |
| DHC Beauty Limited | Wholesale & retail | 2026 |
| Dhillons Brewery Events Ltd | Other services | 2020 |
| Dhillons Brewery Ltd | Manufacturing | 2011 |
| Dhillons Brewery Spire Bar Ltd | Hospitality | 2020 |
| Dhillons Group Limited | Hospitality | 2014 |
| DHJ Developments Limited | Construction | 2019 |
| Dhobha Real Estate Ltd | Real estate | 2021 |
| DHV Beauty Limited | Wholesale & retail | 2026 |
| DI Prestige Build Ltd | Construction | 2025 |
| DI Project Ltd | Administrative & support | 2025 |
| DI Serv Corp Limited | Administrative & support | 2003 |
| Diad Limited | Professional & scientific | 2024 |
| Dial Property Limited | Real estate | 2022 |
| Diamond Carpet Cleaning Ltd | Administrative & support | 2020 |
| Diamond Investment Services Limited | Professional & scientific | 2017 |
| Diamond Lifting Limited | Professional & scientific | 2026 |
| Diamond Roofing & Guttering Services Ltd | Construction | 2018 |
| Diamond Shipping Services Limited | Transport & logistics | 2012 |
| Diamond Teeth Ltd | Health & social care | 2016 |