| DTR Security Limited | Other services | 2016 |
| DTS Home Improvements Limited | Construction | 2015 |
| Dtss Landscapes Limited | Administrative & support | 2022 |
| Dtwt Management Limited | Households | 2019 |
| DUA Accessories 786 Limited | Wholesale & retail | 2026 |
| Dual Care Limited | Health & social care | 2013 |
| Dual Vision Properties Limited | Real estate | 2025 |
| Dualpay Ltd | Information & communication | 2025 |
| Dualvale Ltd | Wholesale & retail | 1999 |
| Duane J Barton Services Limited | Construction | 2015 |
| Duara Capital Ltd | Financial services | 2023 |
| Dubai Realty Ltd | Real estate | 2015 |
| Duban Ltd | Professional & scientific | 2024 |
| Dublo Studios Limited | Professional & scientific | 2023 |
| Duboisfam Limited | Wholesale & retail | 2023 |
| Duck EGG Blue Limited | Professional & scientific | 2011 |
| Ducklings Holdings Ltd | Financial services | 2025 |
| Ducklings Nursery Ltd | Education | 2023 |
| Ducklings Private Nursery Ltd | Education | 2018 |
| Ducklings Stapleford POP OUT & Play Ltd | Health & social care | 2025 |
| Duckworth Mechanical Services Limited | Construction | 2009 |
| Ductcontrol Ltd | Administrative & support | 2021 |
| Dudley Contracting Limited | Construction | 2025 |
| Dudleys Hair Design Limited | Other services | 2008 |
| Dudu PS Mpofu Ltd | Health & social care | 2013 |
| DUE Diligence and Technical Support Ltd | Professional & scientific | 2016 |
| Dueren Care Ltd | Health & social care | 2025 |
| Duffield Building Services Limited | Construction | 2012 |
| Dufflebagboyz Ltd | Wholesale & retail | 2026 |
| Duggleby's Limited | Extraterritorial | 2008 |
| Dukala Consulting Services Limited | Information & communication | 2008 |
| Duke Decor Limited | Construction | 2003 |
| Duke of York Romiley Ltd | Hospitality | 2011 |
| Dukemime Limited | Construction | 1982 |
| Dukeries Service Centre Ltd | Wholesale & retail | 2020 |
| Dukeries Textiles & Fancy Goods Limited | Wholesale & retail | 1974 |
| Dukes Mead (Bingham) Management Company Limited | Households | 2013 |
| Dukki Ltd | Manufacturing | 2016 |
| Dulwich Holdings Limited | Financial services | 2023 |
| Dulwich Laser Beauty Clinic Limited | Health & social care | 2011 |
| DUM DI Ltd | Hospitality | 2022 |
| Dumcontrans Ltd | Transport & logistics | 2022 |
| Dumra Machines UK Ltd | Manufacturing | 2019 |
| Dumra Properties Ltd | Real estate | 2024 |
| Dunbar GB Limited | Hospitality | 1997 |
| Dunbar Leisure Ltd | Real estate | 2013 |
| Duncan Rhodes Painting Academy Limited | Education | 2020 |
| Duncan Turner Associates Limited | Professional & scientific | 2020 |
| Duncan's Car Ltd | Transport & logistics | 2022 |
| Dungiven House Management Co Limited | Households | 2005 |
| Dunham & Haines Limited | Professional & scientific | 1957 |
| Dunkirk Autoparts Ltd | Wholesale & retail | 2020 |
| Dunluce Realty Limited | Real estate | 2023 |
| Dunn Property Investments (UK) Limited | Real estate | 2025 |
| Dunwils Services Ltd | Administrative & support | 2024 |
| DUO Properties Limited | Real estate | 2017 |
| Duoteam Ltd | Wholesale & retail | 2019 |
| Duplex Business Services Limited | Professional & scientific | 2018 |
| Duplex Management Ltd | Professional & scientific | 2013 |
| Durare Ltd | Energy | 2025 |
| Durbay Ltd | Hospitality | 2017 |
| Durbia Limited | Health & social care | 2013 |
| Durbin Consulting Limited | Professional & scientific | 2013 |
| Durcan Midlands Limited | Construction | 2005 |
| Durdu Construction & Decoration Ltd | Construction | 2021 |
| Durham Asset Management Ltd | Construction | 2019 |
| Durham RP Limited | Energy | 2018 |
| Durman Group Ltd | Transport & logistics | 2020 |
| Durojoyeux Ltd | Health & social care | 2025 |
| Durrants GP Limited | Financial services | 2023 |
| Durrants Management Limited | Administrative & support | 2011 |
| Dusan Limited | Manufacturing | 2011 |
| Dusk Till Dawn Ltd | Arts & recreation | 2006 |
| Dustdash Ltd | Administrative & support | 2025 |
| Dutch Gold Limited | Real estate | 2003 |
| Dutton & Hallmark (Funeral Services) Ltd | Extraterritorial | 2003 |
| Dutton Estates Limited | Real estate | 2019 |
| Dutton Property Services Limited | Real estate | 1992 |
| DV Brands UK & EU Ltd | Wholesale & retail | 2024 |
| DVB Homes Limited | Real estate | 2025 |
| Dvls Trans Ltd | Construction | 2019 |
| DVN Design Ltd | Construction | 2020 |
| DVR Paintwork Ltd | Wholesale & retail | 2025 |
| DVS Global Solutions Ltd | Professional & scientific | 2025 |
| DW Building & Construction Ltd | Construction | 2013 |
| DW Building Services Consultants Ltd | Professional & scientific | 2020 |
| DW Construction (Nottingham) Ltd | Construction | 2017 |
| DW Cuisine Limited | Hospitality | 2024 |
| DW Flooring Limited | Wholesale & retail | 2013 |
| DW Global Ltd | Real estate | 2021 |
| DW Grab Hire Limited | Water & waste | 2018 |
| DW Graphic Design Ltd. | Professional & scientific | 2003 |
| DW Group Ltd | Wholesale & retail | 2019 |
| DW Kitchens Nottingham Ltd | Construction | 2020 |
| DW OPS Services Ltd | Professional & scientific | 2023 |
| DW Tattoo (Nottingham) Ltd | Other services | 2018 |
| Dwarf's Cave Ltd | Wholesale & retail | 2025 |
| Dwayne Sykes Coaching Ltd | Education | 2023 |
| DWB Consulting Ltd | Information & communication | 2024 |
| Dwello Developments Ltd | Real estate | 2025 |