| DEJ Enterprise Limited | Information & communication | 2010 |
| Deja VU International Ltd | Wholesale & retail | 2018 |
| Deja VU Property Ltd | Real estate | 2021 |
| Dejupes Ltd | Information & communication | 2026 |
| DEKO31 Ltd | Administrative & support | 2018 |
| DELA3KENSHIK Ltd | Hospitality | 2025 |
| Delam Services Ltd | Health & social care | 2021 |
| Deland Limited | Real estate | 2021 |
| Delayed Completion Limited | Real estate | 2018 |
| Delestrade Laboratories Limited | Professional & scientific | 2022 |
| Delhicious Ltd | Wholesale & retail | 2018 |
| Delights of Harrow Ltd | Hospitality | 2025 |
| Delish Foods Ltd | Hospitality | 2019 |
| DELIVER4DIGITAL Ltd | Information & communication | 2023 |
| Delizia Scura Ltd | Hospitality | 2023 |
| Dell & Guest Limited | Professional & scientific | 2017 |
| Dell (Northwood) Residents Association Limited(The) | Households | 1979 |
| Dell Boii Grips Ltd | Information & communication | 2025 |
| Dell Facilities Limited | Construction | 2008 |
| Dell Farm Management Company Limited | Households | 1983 |
| Dell Technology Ltd | Information & communication | 2024 |
| Delogic Limited | Wholesale & retail | 2013 |
| Dels (UK) Limited | Wholesale & retail | 2000 |
| Delta (the Last Legion) Limited | Information & communication | 2005 |
| Delta (Young Hannibal) Limited | Information & communication | 2005 |
| Delta Air Systems Limited | Manufacturing | 2002 |
| Delta Asset Management Ltd | Real estate | 2026 |
| Delta Diagnostic Ltd | Wholesale & retail | 2025 |
| Delta Direct Investments Limited | Real estate | 2007 |
| Delta Engineers Ltd | Construction | 2019 |
| Delta Films Limited | Information & communication | 2005 |
| Delta GAS Ltd | Construction | 2014 |
| Delta Group INT Holding Ltd | Administrative & support | 2026 |
| Delta House Limited | Administrative & support | 2010 |
| Delta London Asset Management Limited | Real estate | 2015 |
| Delta London Group Limited | Financial services | 2019 |
| Delta Peers Limited | Professional & scientific | 2023 |
| Delta Projects (LDN) Ltd | Construction | 2023 |
| Delta Properties LDN Ltd | Real estate | 2022 |
| Delta Surveying Limited | Professional & scientific | 2016 |
| Delta Trasportation Ltd | Transport & logistics | 2026 |
| Delta Wealth Limited | Arts & recreation | 2014 |
| Delta Wholesale LDN Ltd | Wholesale & retail | 2025 |
| Delta-Ca Ltd | Administrative & support | 2008 |
| Deltacom Integrated Limited | Professional & scientific | 2004 |
| Deltapro Ltd | Wholesale & retail | 2025 |
| Deltauk Ltd. | Administrative & support | 2022 |
| Delton Sterling Limited | Administrative & support | 2005 |
| Deluxe Estates Limited | Real estate | 2005 |
| Deluxe Financial Services Ltd | Financial services | 2025 |
| Deluxe Hire Ltd | Administrative & support | 2023 |
| Deluxe Paan Palace Ltd | Wholesale & retail | 2025 |
| DEM IT Solutions Limited | Information & communication | 2025 |
| Demac Ltd | Manufacturing | 2023 |
| Demec Limited | Manufacturing | 2004 |
| Demelie.K. Plumbing and Heating Ltd | Construction | 2016 |
| Demesne Land Limited | Real estate | 2019 |
| Demetra Antiquities Limited | Wholesale & retail | 2019 |
| Demi ROX Mensah Limited | Arts & recreation | 2025 |
| Demicoma Bridge Academy Ltd | Information & communication | 2020 |
| DEMO4LECSA Ltd | Construction | 2025 |
| Dems Ventures Ltd | Real estate | 2022 |
| DEN Innovations Limited | Manufacturing | 2022 |
| Denaav Holdings Ltd | Financial services | 2025 |
| Denaav Properties Ltd | Real estate | 2026 |
| Denarius Consultancy Limited | Professional & scientific | 2005 |
| Denbigh Management Company Ltd | Professional & scientific | 2011 |
| Denbre Ltd. | Professional & scientific | 2010 |
| Dencam Construction Ltd | Construction | 2025 |
| Dendera Barnet Ltd | Health & social care | 2022 |
| Dene Court (Stanmore) Residents Association Limited | Households | 1959 |
| Deni Limited | Wholesale & retail | 2022 |
| Denis's Kebab Centre Limited | Hospitality | 1997 |
| Denisa Crist Limited | Construction | 2018 |
| Denixpress Limited | Wholesale & retail | 2025 |
| Deniz 2018 Ltd | Hospitality | 2018 |
| Denk Limited | Real estate | 2020 |
| Dennex Limited | Wholesale & retail | 2014 |
| Dennflo Ltd | Transport & logistics | 2025 |
| Dennis Flood Design Consulting Ltd | Professional & scientific | 2017 |
| Denraf Construction Limited | Construction | 2025 |
| Dense Limited | Wholesale & retail | 2019 |
| Dent & Go Ltd | Health & social care | 2022 |
| Dent TIN Ltd | Health & social care | 2026 |
| Denta Premier Ltd | Education | 2013 |
| Dentaire Services Limited | Health & social care | 2022 |
| Dental Accountants Ltd | Professional & scientific | 2024 |
| Dental Collective Ltd | Health & social care | 2026 |
| Dental Group Ltd | Health & social care | 2010 |
| Dental House Exeter Limited | Health & social care | 2021 |
| Dental House Stanmore Limited | Health & social care | 2025 |
| Dentic Limited | Health & social care | 2024 |
| DENTISTRY@442 Wardle Limited | Health & social care | 2023 |
| Dentology (Harley Street) Ltd | Health & social care | 2019 |
| Dentology Healthcare Ltd | Health & social care | 2017 |
| Dentonvine Limited | Households | 1988 |
| Dentrex Limited | Health & social care | 2024 |
| Denwick Medical Limited | Health & social care | 2025 |
| Denwick Wellness Limited | Health & social care | 2025 |
| Denymax Ltd | Construction | 2025 |