| Dandelion Fuse Digital Ltd | Information & communication | 2022 |
| Dandoo Development Ltd | Real estate | 2019 |
| Dandoo Limited | Information & communication | 2011 |
| Dandra Laundrette Ltd | Other services | 2019 |
| Dandy Creative Limited | Professional & scientific | 2014 |
| Dandy's Nutrition Limited | Manufacturing | 2023 |
| Danebrook Limited | Other services | 2000 |
| Danercon Limited | Information & communication | 2004 |
| Daneree Strategic Advisory Limited | Professional & scientific | 2025 |
| Danewell Limited | Real estate | 2005 |
| Danfemonal Limited | Health & social care | 2021 |
| Dangerfield Property Limited | Real estate | 2019 |
| Dania Care Homes Limited | Other services | 2003 |
| Daniel 33 Limited | Transport & logistics | 2025 |
| Daniel Apex Group Limited | Real estate | 2026 |
| Daniel Carpenter Ltd | Construction | 2017 |
| Daniel Dare Limited | Information & communication | 1995 |
| Daniel Furnica Ltd | Construction | 2014 |
| Daniel Healthcare Limited | Health & social care | 2017 |
| Daniel Parslow Limited | Information & communication | 2024 |
| Daniel Rendering Ltd | Construction | 2022 |
| Daniel Tarnaveschi Ltd | Construction | 2018 |
| Daniel Wolfson & Co Ltd | Professional & scientific | 2009 |
| Daniel's Properties Maintenance London Ltd | Construction | 2024 |
| Danijulybee Ltd | Transport & logistics | 2020 |
| Danion Ltd | Construction | 2018 |
| Danish ALI Ltd | Wholesale & retail | 2025 |
| Dankem Ventures Limited | Information & communication | 2024 |
| Danny Grocery Ltd | Wholesale & retail | 2016 |
| Danny Sergiu Ltd | Transport & logistics | 2018 |
| Dans Drones Ltd | Professional & scientific | 2020 |
| Dansar Property Group Ltd | Real estate | 2024 |
| Dansta Ltd | Transport & logistics | 2021 |
| Dansunz LLP | | 2024 |
| Dansy Ltd | Wholesale & retail | 2025 |
| Dantan Limited | Manufacturing | 2001 |
| Danube Properties Consultants Ltd | Professional & scientific | 2024 |
| Danut Construction Ltd | Construction | 2019 |
| Dany Buildings Ltd | Construction | 2020 |
| Dany Carpenters Solution Ltd | Construction | 2012 |
| Dany&Cris Ltd | Households | 2023 |
| Dapper RAV Ltd | Professional & scientific | 2026 |
| DAR AL Shawarma Ltd | Hospitality | 2026 |
| Daravin Limited | Real estate | 2024 |
| Darbar Sweets & Restaurants Limited | Hospitality | 2026 |
| Darci’S Ltd | Hospitality | 2022 |
| Darcom Construction Ltd | Construction | 2022 |
| Darcy’S Italian Ltd | Hospitality | 2024 |
| Dare to Dream Psychology Ltd | Education | 2023 |
| Darfur Bridges CIC | Other services | 2026 |
| Darium London Ltd | Manufacturing | 2023 |
| Darius Transport Limited | Construction | 2025 |
| Dariyaa Limited | Wholesale & retail | 2025 |
| Darj Construction Ltd | Construction | 2025 |
| Darj Developments Ltd | Real estate | 2010 |
| Dark Blue Dream Limited | Extraterritorial | 2017 |
| Dark Films Ltd | Information & communication | 2026 |
| Dark Holdings Ltd | Financial services | 2024 |
| Dark Star Creative Limited | Administrative & support | 2016 |
| Darlingroad Limited | Financial services | 2008 |
| Darodoma Ltd | Manufacturing | 2018 |
| Darrall Macqueen Limited | Information & communication | 2000 |
| Darren Wilson Personal Training Ltd | Arts & recreation | 2018 |
| Darrush Ltd | Transport & logistics | 2018 |
| Darsm Ltd | Professional & scientific | 2021 |
| Dart Investments (2021) LLP | | 2021 |
| Dart Trading Limited | Wholesale & retail | 2019 |
| Darven Limited | Professional & scientific | 2007 |
| Darvis Transport Ltd | Transport & logistics | 2025 |
| DAS Hospitality Limited | Real estate | 2022 |
| Dasa Care Ltd | Financial services | 2024 |
| Dash Autos Limited | Wholesale & retail | 2020 |
| Dash Market Ltd | Wholesale & retail | 2025 |
| Dash Operations Limited | Real estate | 2023 |
| Dashboard Technology Limited | Information & communication | 2009 |
| Dashery Events Limited | Administrative & support | 2024 |
| Dashla Electrical Services Limited | Construction | 2014 |
| Dashtak Ltd | Hospitality | 2023 |
| Daskan 238 Ltd. | Real estate | 2019 |
| Daskan 242 Ltd | Real estate | 2019 |
| Dasmar Ltd | Administrative & support | 2015 |
| Dasmarca Ltd | Wholesale & retail | 2011 |
| Dass PMC Limited | Professional & scientific | 2013 |
| DASS2021 Ltd | Construction | 2021 |
| Dast Tech Limited | Information & communication | 2017 |
| Dastan Limited | Other services | 2017 |
| Dastan London Ltd | Other services | 2025 |
| Dastin Limited | Real estate | 2023 |
| Data 2.0 Limited | Information & communication | 2023 |
| Data Dynamics Software Solutions Limited | Information & communication | 2014 |
| Data Insights and Analytics Consulting Limited | Information & communication | 2020 |
| Data Mining Software Limited | Information & communication | 2014 |
| Data Prima Ltd | Information & communication | 2025 |
| Database Management Services UK Ltd | Other services | 2024 |
| Database Professional Services Limited | Professional & scientific | 1997 |
| Datadino Limited | Information & communication | 2017 |
| Dataflow Zone Ltd | Information & communication | 2025 |
| Dataforge Consulting Ltd | Information & communication | 2025 |
| Datagrid Technologies Ltd | Information & communication | 2021 |
| Dataline Labs Ltd | Information & communication | 2023 |