| DL Member Limited | Professional & scientific | 2020 |
| Dlashaesthetic Ltd | Other services | 2025 |
| Dleh Holdings Limited | Financial services | 2022 |
| DLP Fintech Consulting Services Ltd | Information & communication | 2018 |
| DLR Building Services Ltd | Construction | 2021 |
| DM Epoxy Designs Ltd | Construction | 2023 |
| DMC Plumbing & Heating Solutions Ltd | Construction | 2023 |
| DMD Accounting Ltd | Professional & scientific | 2026 |
| DMG Interiors Ltd | Construction | 2014 |
| DMR Catering Ltd | Hospitality | 2021 |
| DMX Property Management Services Limited | Administrative & support | 2024 |
| DNK Elevators Ltd | Construction | 2026 |
| DO I Date Limited | Information & communication | 2017 |
| DO Lifestyle Limited | Health & social care | 2025 |
| DO YOU Want to Go Walkies Ltd | Agriculture & fishing | 2025 |
| Dobson & Poole Limited | Professional & scientific | 2003 |
| Docetis Consultancy Ltd | Education | 2018 |
| Docetis Ltd | Education | 2014 |
| Doco Productions Ltd | Information & communication | 2023 |
| Docode Limited | Other services | 2019 |
| Doctor to Doctor Ltd | Education | 2024 |
| Doddl Solutions Limited | Information & communication | 2024 |
| Dog MAD Limited | Manufacturing | 2002 |
| Dolla Investments Limited | Real estate | 2026 |
| Dominion Court (Hounslow) RTM Company Limited | Real estate | 2020 |
| Domovoi Management Ltd | Administrative & support | 2012 |
| Domsor Ltd | Construction | 2019 |
| DON London Ltd | Construction | 2017 |
| Done Right Building Services Ltd | Construction | 2015 |
| Done the Wright Way Ltd | Construction | 2023 |
| Donna Dilla Ltd | Health & social care | 2025 |
| Donnas Pet Shop Limited | Wholesale & retail | 2012 |
| Doolan Limited | Education | 2000 |
| Dooley Dough Ltd | Hospitality | 2025 |
| Doran Consultancy Limited | Professional & scientific | 2016 |
| Dorin Court Limited | Households | 1989 |
| Dormant 1234 Limited | Extraterritorial | 2020 |
| Dormant 12345 Limited | Administrative & support | 2020 |
| DOT Ingenuity ( Web and Social Media) Limited | Extraterritorial | 2014 |
| Dotai Limited | Information & communication | 2024 |
| Double AA Residentials & Developments Ltd | Households | 2019 |
| Double Down Limited | Wholesale & retail | 2018 |
| Doughdaddyuk Ltd | Hospitality | 2025 |
| Doughty Plumbing and Heating Ltd | Construction | 2024 |
| Douglas Graham (Management) Limited | Households | 1969 |
| Downham Celebrates Limited | Arts & recreation | 2014 |
| Downham Driving School Ltd | Education | 2024 |
| Downham International Food Market Ltd | Wholesale & retail | 2025 |
| Downham Kebab Ltd | Hospitality | 2026 |
| Downham Mews Residents Association Limited | Households | 2025 |
| Downham Pound Plus Ltd | Wholesale & retail | 2025 |
| Downham Way PO Ltd | Transport & logistics | 2025 |
| Downhill Swim Limited | Financial services | 2022 |
| Downlight Magic Limited | Wholesale & retail | 2018 |
| Downsbridge Ltd | Professional & scientific | 2026 |
| Downtown Studio London Ltd | Information & communication | 2025 |
| Doxa Links Ltd | Health & social care | 2014 |
| Doyle Simpson Properties Limited | Real estate | 2016 |
| DP Advisory Services Ltd | Professional & scientific | 2018 |
| DP Tech ARC Ltd | Information & communication | 2013 |
| Dph-Insc Limited | Professional & scientific | 2026 |
| Dpjh Services Limited | Professional & scientific | 2020 |
| DPM Solutions Kent Ltd | Professional & scientific | 2025 |
| DPR Transformation Services Ltd | Professional & scientific | 2026 |
| DPS Property Investments Ltd | Real estate | 2014 |
| DPS Surveying Limited | Professional & scientific | 2015 |
| DR AB Property Limited | Real estate | 2023 |
| DR Banks Gastro Limited | Health & social care | 2025 |
| DR Boba Trading (UK) Limited | Wholesale & retail | 2022 |
| DR Gautam Kulkarni Limited | Health & social care | 2026 |
| DR LS Medical Limited | Health & social care | 2025 |
| DR Maria Limited | Administrative & support | 2016 |
| DR Pawpaw Limited | Wholesale & retail | 2013 |
| DR Security Ltd | Administrative & support | 2024 |
| DR VP Ltd | Health & social care | 2014 |
| Dr-Ime Consulting Ltd | Health & social care | 2020 |
| Dr-Ime Holding Limited | Financial services | 2024 |
| Dr-Ime Limited | Professional & scientific | 2014 |
| DR. Asopa’S Academy Ltd | Manufacturing | 2026 |
| DR. Helena & Dmitri GP Ltd | Health & social care | 2015 |
| DR. J. Kalyan Ltd | Health & social care | 2022 |
| Draffen Construct Ltd | Construction | 2025 |
| Drafted in Ltd | Professional & scientific | 2020 |
| Dragonwood Real Estate Limited | Real estate | 2024 |
| Drake Mews Limited | Real estate | 2003 |
| Draw Solution Services Ltd | Professional & scientific | 2022 |
| Dray Court (Worcester Park) Residents Association Limited | Households | 1986 |
| Drbp Ltd | Administrative & support | 2016 |
| Dream Home Bromley Limited | Real estate | 2025 |
| Dream Housing Cleaning Ltd | Administrative & support | 2025 |
| Dream Housing Group Ltd | Financial services | 2025 |
| Dream Housing Investments Ltd | Real estate | 2024 |
| Dream Housing Ltd | Construction | 2023 |
| Dream Housing Maintenance Ltd | Construction | 2025 |
| Dream Housing Removals Ltd | Transport & logistics | 2025 |
| Dreamatorium Ltd | Information & communication | 2013 |
| Dreamer Clothing Ltd | Wholesale & retail | 2018 |
| Dreamlook Creative Ltd | Information & communication | 2024 |
| Dreamsjet Technologies Ltd | Wholesale & retail | 2025 |
| Dreamys Kitchen Limited | Hospitality | 2026 |