| Dirty Dogs Pamper Parlour Ltd | Other services | 2021 |
| DIS N DAT Limited | Real estate | 2025 |
| Discovering VR Limited | Information & communication | 2017 |
| DISCOVERY3 Limited | Administrative & support | 2015 |
| Distraction Community and Youth Project CIC | Education | 2025 |
| DIY and Goods Limited | Wholesale & retail | 2011 |
| DJ Coughlin Ltd | Administrative & support | 2008 |
| DJ Odon Limited | Professional & scientific | 2011 |
| DJ Shep Beats Ltd | Arts & recreation | 2024 |
| DJB Aviation Consulting Limited | Administrative & support | 2018 |
| Djbabidexxx Ltd | Wholesale & retail | 2025 |
| DJM Engineering (Banbury) Limited | Professional & scientific | 2014 |
| Dktandel Ltd | Professional & scientific | 2016 |
| DLD Enterprises Ltd | Hospitality | 2008 |
| DLG Property Services Ltd | Professional & scientific | 2025 |
| DN Group Ltd | Wholesale & retail | 2024 |
| Dnab Industries Ltd | Wholesale & retail | 2018 |
| DNE Records Ltd | Administrative & support | 2026 |
| DNL Transport Ltd | Transport & logistics | 2024 |
| Dog Close Limited | Extraterritorial | 2021 |
| Dogs for Good | Professional & scientific | 2002 |
| Dogs for the Disabled Limited | Other services | 2015 |
| Doherty’ Home Improvements Ltd | Construction | 2023 |
| Doidge Developments Ltd | Construction | 2014 |
| Dollar Electronics Consulting Limited | Real estate | 2018 |
| Dollar Rentals Limited | Hospitality | 2015 |
| Dolphin Bars Limited | Hospitality | 2025 |
| Dolphin Executive Services Limited | Professional & scientific | 1985 |
| Dolphin Inn 1717 Ltd | Hospitality | 2026 |
| Domtrim Ltd | Information & communication | 2019 |
| Dona & Co. Accountants Ltd | Professional & scientific | 2025 |
| Donaghy Property Development & Management Ltd | Construction | 2022 |
| Donald Galt Bloodstock Ltd | Agriculture & fishing | 2023 |
| Donald Mcgonagle Limited | Professional & scientific | 2021 |
| Donald Robinson (Great Britain) Limited | Health & social care | 2018 |
| Donovan Training Associates Ltd | Administrative & support | 2005 |
| Donvik Computers Ltd | Other services | 2026 |
| Dooboojo Limited | Manufacturing | 2004 |
| Doohan Consulting Limited | Professional & scientific | 2014 |
| Doré Group Holdings Ltd | Financial services | 2026 |
| Doski's Barbershop Ltd | Other services | 2018 |
| Dotebroom Limited | Real estate | 1983 |
| Double D&G Ltd | Transport & logistics | 2022 |
| Double M Autos Ltd | Wholesale & retail | 2008 |
| Double M Logistics Solution Ltd | Transport & logistics | 2016 |
| Double M. Transport (Banbury) Ltd. | Transport & logistics | 1984 |
| Douglas Wellbeing Ltd | Health & social care | 2025 |
| Douse Machining Limited | Manufacturing | 2014 |
| Douwam Ltd | Real estate | 2019 |
| Dovetail International Solutions Limited | Professional & scientific | 2017 |
| Dovey Accountancy Services Limited | Professional & scientific | 2003 |
| Dowling Financial Limited | Financial services | 2015 |
| DP Peterborough Limited | Hospitality | 2005 |
| Dpia Limited | Professional & scientific | 2011 |
| Dppj Ltd | Financial services | 2010 |
| Dpsam Properties Ltd | Real estate | 2020 |
| Dpsam Property Ltd | Real estate | 2022 |
| DPT Transport Ltd | Transport & logistics | 2025 |
| DR AJ Ellis Gastroenterology Limited | Health & social care | 2016 |
| DR Spedition Ltd | Transport & logistics | 2019 |
| Drake Lapthorn Limited | Professional & scientific | 2010 |
| Dramapop Ltd | Information & communication | 2021 |
| Draymans Walk Management Company Limited | Households | 1989 |
| Drayton Farming Limited | Agriculture & fishing | 2024 |
| DRB Business Solutions Limited | Construction | 2016 |
| Dream World Beauty Ltd | Wholesale & retail | 2024 |
| Dreamful Group UK Limited | Hospitality | 2026 |
| Dreamsleep Ltd | Wholesale & retail | 2024 |
| Dreamz Property Services Ltd | Real estate | 2023 |
| DRF Cleaning Solutions Ltd | Administrative & support | 2009 |
| Drifting Moon Ltd | Wholesale & retail | 2025 |
| Driving UA Ltd | Wholesale & retail | 2024 |
| Driving Ukraine Ltd | Health & social care | 2024 |
| Dromoi Ltd | Information & communication | 2026 |
| Drone Defender Limited | Information & communication | 2024 |
| DRY Kids Limited | Extraterritorial | 2013 |
| DS Turkish Barbers Limited | Other services | 2023 |
| Dsear Online Limited | Professional & scientific | 2022 |
| DST Property Limited | Real estate | 2015 |
| DSV United Kingdom Limited | Wholesale & retail | 2008 |
| Dt-Squad Limited | Information & communication | 2021 |
| Dualtech Limited | Wholesale & retail | 2026 |
| Duncan Dawes Farms Limited | Agriculture & fishing | 1994 |
| Dundrinquin Limited | Extraterritorial | 2015 |
| Dunkley Residential Ltd | Real estate | 2026 |
| Dunmiles Ltd | Hospitality | 2025 |
| Dunroman Limited | Financial services | 2017 |
| Dury Enterprise Limited | Wholesale & retail | 2025 |
| Dwelliouk Ltd | Real estate | 2025 |
| DWG Plans (Chilterns & Surrey Hills) Limited | Professional & scientific | 2011 |
| Dynamic Bots Ltd | Information & communication | 2025 |
| Dynoptic Systems Limited | Manufacturing | 1985 |
| E L S Hill Ltd | Arts & recreation | 2025 |
| E Sellon Limited | Health & social care | 2018 |
| E Solutions Oxford Limited | Wholesale & retail | 2025 |
| E&Gi Limited | Hospitality | 2024 |
| E&J Ventures Ltd | Wholesale & retail | 2024 |
| E&M Property Portfolio Ltd | Real estate | 2025 |
| E&R Cookson Properties Ltd | Real estate | 2023 |
| E&W Estates Ltd | Construction | 2021 |