| DNA Youth Consultancy Ltd | Health & social care | 2020 |
| Dnaaz Ltd | Wholesale & retail | 2021 |
| Dnaaz Tour & Travel Ltd | Administrative & support | 2023 |
| DNG Group Ltd | Wholesale & retail | 2018 |
| DNV Investments Ltd | Real estate | 2015 |
| DO Care Foundation Ltd | Health & social care | 2024 |
| DO Care Services Ltd | Health & social care | 2024 |
| Doaaba Ltd | Other services | 2020 |
| Doaba Meat Ltd | Wholesale & retail | 2021 |
| DOB Decor Ltd | Construction | 2021 |
| Dodaz Limited | Wholesale & retail | 2025 |
| Dogra Energy Assessment Limited | Professional & scientific | 2024 |
| Dollz Production House Ltd | Wholesale & retail | 2025 |
| Dolphin Freight Ltd | Transport & logistics | 2018 |
| Domestic GAS and Heating Ltd | Construction | 2018 |
| DON Logistics Limited | Transport & logistics | 2026 |
| DON Telecom Limited | Information & communication | 2003 |
| Doni & Sons Transport Limited | Transport & logistics | 2025 |
| Dordal Limited | Real estate | 2019 |
| Dormer's Fish & Chip Ltd | Hospitality | 2017 |
| Dormers Wells Learning Trust | Education | 2017 |
| Dormers Wells Limited | Real estate | 2019 |
| Dosanjh Builders Ltd | Construction | 2020 |
| Dostana Bedding Ltd | Other services | 2025 |
| DOT & Drop Ltd | Wholesale & retail | 2025 |
| Dotson London Ltd | Wholesale & retail | 2025 |
| Double a Sellers Ltd | Wholesale & retail | 2024 |
| Doves Nest World Ltd | Real estate | 2025 |
| Down Air Force One Film Limited | Information & communication | 2009 |
| Downtown Properties Ltd | Real estate | 2023 |
| DP Housing Ltd | Real estate | 2021 |
| Dpdk Group Ltd | Hospitality | 2026 |
| DPP Trading Limited | Wholesale & retail | 2017 |
| DPS Home Improvment Ltd | Construction | 2020 |
| DPS Homes London Ltd | Construction | 2023 |
| Dpss Construction Ltd | Construction | 2025 |
| DR Combi Properties Ltd | Real estate | 2026 |
| DR Electric Solutions Limited | Other services | 2022 |
| DR GUL Ltd | Health & social care | 2022 |
| DR L Heer Ltd | Health & social care | 2024 |
| DR Property Estate Limited | Real estate | 2025 |
| DR Punni Ltd | Other services | 2025 |
| DR Singh MR Biring Estates Ltd | Real estate | 2025 |
| DR T.Fix Ltd | Wholesale & retail | 2020 |
| DR Tread Ltd | Wholesale & retail | 2026 |
| Dr-Hsb Ltd | Health & social care | 2024 |
| Dream Development London Ltd | Construction | 2021 |
| Dream Home Design & Construction Ltd | Construction | 2026 |
| Dream Home Improvements Ltd | Construction | 2024 |
| Dream PB Logistics Ltd | Transport & logistics | 2025 |
| Dream Properties Southall Ltd | Real estate | 2023 |
| Dream Solid Home Ltd | Construction | 2026 |
| Dream Support Solutions Ltd | Real estate | 2022 |
| Dream Wedding Studio Limited | Professional & scientific | 2021 |
| Dream Windows Limited | Construction | 2022 |
| Dream-House Renovation Ltd | Construction | 2020 |
| Dreamers Admin Limited | Public administration | 2026 |
| Dreamland Construction Limited | Construction | 2017 |
| Dreams Design and Build Ltd | Construction | 2018 |
| Drinkora Ltd | Real estate | 2026 |
| Driving Bookings Limited | Education | 2023 |
| DRK Construction Services Ltd | Construction | 2026 |
| DRM BOY Holdings Ltd | Financial services | 2026 |
| DRM BOY Investors Ltd | Real estate | 2026 |
| Dropline Express Ltd | Transport & logistics | 2025 |
| DRY Fruit Shop Ltd | Wholesale & retail | 2020 |
| DS Food & Wine Ltd | Wholesale & retail | 2014 |
| DS Martial Arts Centres Limited | Other services | 2022 |
| DS Motors Nagi Limited | Wholesale & retail | 2018 |
| DS UK Construction Limited | Construction | 2021 |
| DSA Gill Ltd | Transport & logistics | 2022 |
| Dscons Ltd | Construction | 2026 |
| DSG Events Limited | Wholesale & retail | 2025 |
| Dsingh Business Ltd | Wholesale & retail | 2025 |
| DSK Investment Limited | Real estate | 2019 |
| DSM Nutritional Products (UK) Limited | Manufacturing | 2000 |
| DSM Trustee Company Limited | Professional & scientific | 2004 |
| DSP Lounges Ltd | Hospitality | 2026 |
| DSR UK Ltd | Construction | 2009 |
| Dsryatra Limited | Administrative & support | 2025 |
| DTF Associates Ltd | Information & communication | 2009 |
| DTK Consultancy Ltd | Professional & scientific | 2022 |
| Duaa Aslam Consultancy Ltd | Professional & scientific | 2025 |
| Dubai Fashion & Perfume London Ltd | Extraterritorial | 2026 |
| Dubb Chauffeurs Ltd | Transport & logistics | 2016 |
| Dudley Warehouse Ltd | Real estate | 2023 |
| DUE Social Care Limited | Health & social care | 2021 |
| Dumwrap Ltd | Hospitality | 2025 |
| Dunlop Realty Ltd | Real estate | 2025 |
| DUR DUR Traders Ltd | Information & communication | 2011 |
| Duraglaze Windows and Doors Ltd | Construction | 2020 |
| Durawears Ltd | Wholesale & retail | 2026 |
| Durwin Glazing Ltd | Manufacturing | 2019 |
| Dutchmoor Limited | Wholesale & retail | 2019 |
| Dutt Films Ltd | Information & communication | 2021 |
| Dutyfier Ltd | Administrative & support | 2025 |
| DVA Kitchens Bedrooms Shop Fittings Ltd | Construction | 2021 |
| DW Motor Services Ltd | Wholesale & retail | 2024 |
| Dwhj Ltd | Transport & logistics | 2025 |
| DWV Slough Ltd | Wholesale & retail | 2025 |