| DTB Carbyne Apps Ltd | Information & communication | 2018 |
| DTC Global Ltd | Administrative & support | 2020 |
| DTD Training Limited | Education | 2005 |
| DTF Rail Services Limited | Manufacturing | 2017 |
| DTG Interiors Ltd | Construction | 2019 |
| Dtip Ltd | Arts & recreation | 2024 |
| DTR Corp. Ltd | Wholesale & retail | 2025 |
| Dtvt Ltd | Information & communication | 2019 |
| DTW Creative Solutions Ltd | Manufacturing | 2021 |
| DUA Ecom Limited | Wholesale & retail | 2021 |
| Dualpost Limited | Administrative & support | 1993 |
| Duarte Tavares Traffics Ltd | Other services | 2020 |
| Dubai Consultancy Ltd | Professional & scientific | 2019 |
| Dubai Healthcare Inc. Ltd | Health & social care | 2010 |
| Dubai Superstore Ltd | Wholesale & retail | 2017 |
| Dubai Vendome Ltd | Information & communication | 2025 |
| Dubaikids Limited | Professional & scientific | 2020 |
| Ducere Limited | Professional & scientific | 2011 |
| Duchuk Ltd | Other services | 2019 |
| Duchy Project Management Limited | Professional & scientific | 2012 |
| Duckgoose Properties Limited | Real estate | 2020 |
| Duckworth & Griffiths Property Limited | Construction | 2021 |
| Duclos Travel Ltd | Transport & logistics | 2017 |
| Dudden Law Solicitors Limited | Professional & scientific | 2019 |
| Dudley Hotels Trading Ltd | Hospitality | 2017 |
| Dudleys Aluminium Limited | Manufacturing | 2005 |
| Duet Note Limited | Wholesale & retail | 2002 |
| Duffryn Glas (Hawthorn) Management Company Limited | Households | 2014 |
| Duffryn Healthcare Ltd | Health & social care | 2024 |
| Duffryn House Management Company Limited | Professional & scientific | 2004 |
| Dugard Holdings Ltd | Real estate | 2019 |
| Dugard Property Ltd | Real estate | 2019 |
| Dughig Properties Ltd | Real estate | 2021 |
| Duha Limited | Health & social care | 2024 |
| Duke Leads Ltd | Administrative & support | 2017 |
| Dukinfield Flooring Limited | Construction | 2015 |
| Dulais PT Ltd | Health & social care | 2024 |
| Dulakova Social Care Limited | Health & social care | 2016 |
| Dulo Surveyors Limited | Professional & scientific | 2016 |
| Dulros Ltd | Wholesale & retail | 2025 |
| Dulwich Gardens Properties Limited | Households | 1981 |
| Dulwich House Management Company Limited | Households | 1982 |
| Dulwich Rose Cleaners Ltd | Administrative & support | 2019 |
| Dumana Transit Ltd | Transport & logistics | 2018 |
| Dumark Garden Services Ltd | Arts & recreation | 2020 |
| Dumaulex Ltd | Wholesale & retail | 2025 |
| Dumfries Trading Group Limited | Wholesale & retail | 2023 |
| Dumitru Vernica Ltd | Construction | 2017 |
| Dumont Limited | Construction | 2015 |
| Dunbar Restaurants Ltd | Hospitality | 2018 |
| Dundar Ltd | Wholesale & retail | 2021 |
| Dunfold Holding Limited | Wholesale & retail | 2021 |
| Dunford Structural Engineering Limited | Professional & scientific | 2019 |
| Dunleavy House Limited | Real estate | 2024 |
| Dunmar Recruitment Limited | Administrative & support | 2011 |
| Dunnya Grill Limited | Hospitality | 2024 |
| Dunraven Design Studio Ltd | Professional & scientific | 2023 |
| Dunraven Estates Limited | Real estate | 1996 |
| Dunraven Estates Properties Limited | Real estate | 1996 |
| DUO & Associates Ltd | Professional & scientific | 2014 |
| DUO Recruitment Ltd | Other services | 2019 |
| Duoer Ltd | Information & communication | 2026 |
| Duology Entertainment Ltd | Arts & recreation | 2026 |
| Duong Art Mask Co., Ltd | Manufacturing | 2025 |
| Duplex Srvrs Ltd | Wholesale & retail | 2023 |
| Duplex VPS Ltd | Information & communication | 2020 |
| Duppys Foods Limited | Manufacturing | 2025 |
| Duqe Limited | Wholesale & retail | 2018 |
| DUR DUR Band International Ltd | Arts & recreation | 2018 |
| Dura & Turculet Ltd | Administrative & support | 2017 |
| Duracell Overseas Trading Limited | Manufacturing | 1947 |
| Duralab Ltd | Wholesale & retail | 2025 |
| Durann Ltd | Wholesale & retail | 2025 |
| Durfisha Ltd | Wholesale & retail | 2025 |
| Durham City Builders Ltd | Construction | 2012 |
| Durham Preservation Ltd | Construction | 2012 |
| Durling Long Real Estate Ltd | Real estate | 2021 |
| Durlston Properties Limited | Construction | 2012 |
| Durmaz Olive (UK) Ltd | Wholesale & retail | 2018 |
| Dursley Fish & Chips Limited | Hospitality | 2025 |
| Dusk Till Dawn Recoveries Ltd | Transport & logistics | 2026 |
| Dustana Ltd | Wholesale & retail | 2018 |
| Dustandthings Ltd | Arts & recreation | 2013 |
| Dustbusters Xtreme Cleaning Services Ltd | Administrative & support | 2017 |
| Dusters South Wales Limited | Administrative & support | 2016 |
| Dutch International Ltd | Wholesale & retail | 2025 |
| Dutch Network for Academics in the UK Ltd | Professional & scientific | 2019 |
| Dutch Shell Limited | Wholesale & retail | 2025 |
| Dutchess Properties Ltd | Real estate | 2018 |
| Dutney Holdings Ltd | Financial services | 2021 |
| Duty Free Limited | Wholesale & retail | 2018 |
| Duvik Ltd | Manufacturing | 2021 |
| Duwiol Group Ltd | Professional & scientific | 2024 |
| Duzay Ltd | Wholesale & retail | 2022 |
| DV & V Recruitment and Accounting Limited | Construction | 2015 |
| DV Services Norfolk Ltd | Other services | 2018 |
| DVA Healthcare Solutions Ltd | Financial services | 2025 |
| DVF Holdings Ltd | Financial services | 2023 |
| DVF Properties Limited | Real estate | 2024 |
| DVS Soft Limited | Administrative & support | 2007 |