| DM Foods (Cardiff) Ltd | Hospitality | 2023 |
| DM Leisure Ltd | Agriculture & fishing | 2026 |
| DM Technical Solutions Ltd | Professional & scientific | 2024 |
| DM1 Food Ltd | Hospitality | 2025 |
| DME Technical Consulting Ltd | Professional & scientific | 2022 |
| Dmholmes Limited | Construction | 2026 |
| Dmitrij Trans Ltd | Transport & logistics | 2022 |
| Dmjl Holdings Limited | Professional & scientific | 2004 |
| Dmjl Limited | Real estate | 2004 |
| Dmngo Holdings Ltd | Information & communication | 2020 |
| DMP CNC and Fabrication Ltd | Manufacturing | 2021 |
| DNA Automotive Solutions Ltd | Wholesale & retail | 2013 |
| DNK Associates Limited | Professional & scientific | 2006 |
| DOC WOB Ltd | Wholesale & retail | 2014 |
| Dochq Limited | Health & social care | 2018 |
| Docsiddiqui Medical Services Ltd | Health & social care | 2011 |
| Dodgson Matty Partnership Limited | Professional & scientific | 2020 |
| Dog Bond Ltd | Professional & scientific | 2009 |
| Dolphin Close (Worcester) Management Company Limited | Households | 1981 |
| Dolphin Computer Access Limited | Information & communication | 1986 |
| Dolphin Towers Ltd | Real estate | 2021 |
| Dolphincorp Technologies Ltd | Information & communication | 2019 |
| Doltons Wharf Management Limited | Real estate | 2005 |
| Domain Privacy Protector Limited | Extraterritorial | 2008 |
| Dome Brands Limited | Hospitality | 2024 |
| Dome Payroll Ltd | Administrative & support | 2024 |
| DON Fish and Chips Ltd | Hospitality | 2023 |
| Donald Berry Limited | Construction | 2019 |
| Done Virtually Ltd | Administrative & support | 2020 |
| Doorstep Kingdom Limited | Arts & recreation | 2023 |
| DOR Doners Ltd | Hospitality | 2020 |
| Dorchester & Grosvenor Estates Ltd | Real estate | 2000 |
| Dorchester and Grosvenor Developments Ltd | Extraterritorial | 2000 |
| Dorglen Limited | Real estate | 1975 |
| Dortrend International Limited | Manufacturing | 1972 |
| Dotted Eyes Solutions Limited | Information & communication | 2015 |
| Double Black Consulting Limited | Professional & scientific | 2021 |
| Double Dough Ltd | Hospitality | 2021 |
| Double SS Limited | Other services | 2018 |
| Doubury (Old Church Street) Limited | Real estate | 2006 |
| Doubury (Thornhill Road) Limited | Real estate | 2016 |
| Doubury Investments (Midlands) Limited | Real estate | 1975 |
| Doubury Limited | Real estate | 2015 |
| Douglas Creative Group Ltd | Wholesale & retail | 2019 |
| Douk Ltd | Manufacturing | 2014 |
| Dovaston Building Services Limited | Construction | 2011 |
| Dove Developments UK Limited | Construction | 2003 |
| Dovehills Farm Limited | Real estate | 2014 |
| DP Farriers Ltd | Agriculture & fishing | 2017 |
| DPF Restore Bristol Limited | Wholesale & retail | 2026 |
| DPH Robotics Ltd | Professional & scientific | 2014 |
| DR and MRS J J Greenwood Limited | Health & social care | 2016 |
| DR Bode Ensam Limited | Health & social care | 2017 |
| DR Green Fingers Ltd | Wholesale & retail | 2020 |
| DR Jonathan Salter Ltd | Health & social care | 2018 |
| DR. Bartlomiej Kurec Ltd | Health & social care | 2025 |
| Dragon Precision Limited | Wholesale & retail | 2022 |
| Dragon Star Security Limited | Administrative & support | 2019 |
| Dragon Timber Frame Ltd | Construction | 2021 |
| Drain JET Surveys Limited | Administrative & support | 2018 |
| Drainmaster Limited | Extraterritorial | 1998 |
| Draw Developments Limited | Real estate | 2003 |
| DRB Trade Ltd | Wholesale & retail | 2025 |
| Dream Design Develop Deploy Ltd | Information & communication | 2024 |
| Dream Feeds Limited | Health & social care | 2025 |
| Dreams Event Management & Decorations UK Ltd | Hospitality | 2021 |
| Dreamscape Retreats Ltd | Hospitality | 2025 |
| Dreamwild Ltd | Wholesale & retail | 2022 |
| Drink Dome Ltd | Hospitality | 2024 |
| Drive RJM Ltd | Education | 2025 |
| Drive Sports Medicine Ltd | Other services | 2018 |
| Drive Taxi App Ltd | Transport & logistics | 2016 |
| Driven Marketing Agency Ltd | Professional & scientific | 2023 |
| Driver Property Limited | Real estate | 2022 |
| Drivewise Pro Ltd | Transport & logistics | 2025 |
| Driving Heroes (Storage) Limited | Transport & logistics | 2025 |
| Driving Heroes Limited | Wholesale & retail | 2024 |
| DRM Health Ltd | Health & social care | 2022 |
| Droitwich Arch Rivals Limited | Hospitality | 2024 |
| Droitwich Archery Society Ltd | Arts & recreation | 2015 |
| Droitwich Diesel Services Limited | Wholesale & retail | 2009 |
| Droitwich Finance Limited | Real estate | 1970 |
| Droitwich Housing Limited | Real estate | 2017 |
| Droitwich Motor Factors Limited | Wholesale & retail | 2010 |
| Droitwich Well Being Hub CIC | Health & social care | 2022 |
| Drollery Limited | Information & communication | 2022 |
| Drop Heaven Ltd | Wholesale & retail | 2025 |
| Drop Inn Limited | Hospitality | 2014 |
| DRP Amigo's Ltd | Hospitality | 2021 |
| DRS Developments [UK] Limited | Construction | 2003 |
| DRS Education Ltd | Education | 2022 |
| DS Cloud Limited | Information & communication | 2019 |
| DSC Design Solutions Ltd | Professional & scientific | 2014 |
| DSD Food Ltd | Hospitality | 2023 |
| DSE Electrotechnical Limited | Construction | 2018 |
| DSP Tirol Limited | Financial services | 2014 |
| Dsurv Ltd | Construction | 2023 |
| DTG Trading Limited | Transport & logistics | 2008 |
| DTR Property Development Limited | Real estate | 2026 |
| Duckhouse Design Ltd | Professional & scientific | 2020 |