| DE Gilham Electrical Services Ltd | Construction | 2026 |
| Deadwalkers Limited | Information & communication | 2025 |
| DEALSONPARTS365 Ltd | Wholesale & retail | 2024 |
| Debianchi Homes Limited | Real estate | 2025 |
| Deboir Property Ltd | Real estate | 2023 |
| DEC Collects Ltd | Wholesale & retail | 2025 |
| DEC Offshore Limited | Other services | 2012 |
| Decoded MED Ltd | Education | 2025 |
| Deep Consult Ltd | Manufacturing | 2026 |
| Deeside Camper Conversions Ltd | Manufacturing | 2020 |
| DEL Brock Holdings Ltd | Financial services | 2024 |
| Dels Properties Limited | Real estate | 2018 |
| Dencare 2000 Limited | Health & social care | 2000 |
| Denclean Dental Practice Limited | Health & social care | 2006 |
| Dene Side Lodge Ltd | Households | 2025 |
| Denny Knights Limited | Real estate | 2000 |
| Dering Investment Company Limited | Financial services | 2025 |
| Dero Properties Limited | Real estate | 2018 |
| Derrick Services (UK) Limited | Manufacturing | 2007 |
| Desh Taxi Ltd | Transport & logistics | 2023 |
| Deshi Curry House Ltd | Hospitality | 2025 |
| Design Trifecta Ltd | Wholesale & retail | 2026 |
| Designographic Limited | Professional & scientific | 1992 |
| Destiny Books Ltd | Information & communication | 2017 |
| Destiny Shapers Limited | Wholesale & retail | 2011 |
| Desy Medical Limited | Health & social care | 2022 |
| Detailed Design Services Limited | Information & communication | 2024 |
| Detecta-Link Security & Safety Solutions Limited | Administrative & support | 2008 |
| Develp Limited | Information & communication | 2021 |
| Devine Bars and Clubs Ltd | Hospitality | 2022 |
| Devine Brewing Company Ltd | Manufacturing | 2022 |
| Devine Business Consultancy Ltd | Professional & scientific | 2020 |
| Devine Business Development Ltd | Professional & scientific | 2020 |
| Devine Business Management Ltd | Professional & scientific | 2020 |
| Devine Business Services Ltd | Professional & scientific | 2020 |
| Devine Coffee Company Ltd | Hospitality | 2023 |
| Devine Companies Ltd | Professional & scientific | 2020 |
| Devine Food and Drink Company Ltd | Hospitality | 2022 |
| Devine Leisure Ltd | Hospitality | 2020 |
| Devine Property Development Ltd | Construction | 2022 |
| Devine PUB Company Ltd | Hospitality | 2022 |
| Devine PUB Consultancy Ltd | Professional & scientific | 2020 |
| Devine Security Ltd | Administrative & support | 2020 |
| Devine Wines and Spirits Company Ltd | Wholesale & retail | 2022 |
| Dexters Recruitment Ltd | Administrative & support | 2010 |
| DH Construction and Civils Ltd | Construction | 2026 |
| DHL Properties Ltd | Real estate | 2025 |
| Diadem Group Limited | Financial services | 2026 |
| Diadem Hotel Limited | Hospitality | 2023 |
| Diadem House Limited | Hospitality | 2023 |
| Diddington 1 Limited | Energy | 2022 |
| Diesel Power (East Anglia) Limited | Manufacturing | 2006 |
| Digisure Limited | Information & communication | 2021 |
| Digital Jump Solutions Ltd | Wholesale & retail | 2025 |
| Digital Phone Company Limited | Information & communication | 1997 |
| Digital Phone Holdings Limited | Information & communication | 2014 |
| Digitel TV Limited | Information & communication | 2007 |
| Digiview Ltd. | Construction | 2013 |
| Dipla Limited | Professional & scientific | 2007 |
| Direct Electrical (EA) Ltd | Construction | 2022 |
| Direct EV Charging Ltd | Construction | 2022 |
| Direct Renewables Ltd | Extraterritorial | 2023 |
| Diro (PVT) Ltd | Wholesale & retail | 2025 |
| Discount Motor Parts Limited | Wholesale & retail | 2023 |
| Discreet Security Limited | Administrative & support | 2010 |
| Display Products Limited | Manufacturing | 2006 |
| Displaypro (Lincs) Limited | Manufacturing | 2015 |
| Displaypro Limited | Manufacturing | 2016 |
| Divene Hair Extension Salon Limited | Other services | 2024 |
| DJ Marvel Ltd | Real estate | 2025 |
| DJ Oakley Scaffolding & Access Ltd | Construction | 2023 |
| DJB Piling Operator Services Ltd | Construction | 2025 |
| DJG Geotechnical Offshore Limited | Professional & scientific | 2019 |
| DJH Global Inspections Ltd | Professional & scientific | 2026 |
| DKO Rentals Limited | Real estate | 2023 |
| DLK Offshore Services Limited | Manufacturing | 2013 |
| DM Pets Ltd | Wholesale & retail | 2021 |
| DM Property Developments Limited | Construction | 2017 |
| Dmak Building and Renovation Ltd | Construction | 2026 |
| DMW Offshore Ltd | Professional & scientific | 2025 |
| DN Design Studio Limited | Professional & scientific | 2011 |
| DN Food and Off-Licence Limited | Wholesale & retail | 2018 |
| DNM Real Estate Limited | Real estate | 2010 |
| DNR Electrical EA Ltd | Construction | 2025 |
| DNT Builders Limited | Construction | 2021 |
| Docwra Engineering Ltd | Manufacturing | 2022 |
| Docwra Secure Storage Limited | Real estate | 2025 |
| Dodson Retail Limited | Wholesale & retail | 2019 |
| Dog Gone Holidays Limited | Hospitality | 2026 |
| Dogufood Ltd | Hospitality | 2026 |
| Dojus Transport Ltd | Transport & logistics | 2021 |
| Dolly Property Group Ltd | Real estate | 2026 |
| DOM & Cass Civil Engineering Ltd | Construction | 2011 |
| Dominic Keating Mortgage and Protection Limited | Financial services | 2018 |
| Donnatella's Limited | Wholesale & retail | 2017 |
| Donvan Ltd | Other services | 2019 |
| Doofus Foods Limited | Wholesale & retail | 2010 |
| Dorluxe Limited | Manufacturing | 2004 |
| Dovedown Limited | Financial services | 1988 |
| Dovemile Limited | Other services | 2016 |