| DNA Access Ltd | Construction | 2013 |
| DND Dwellings Ltd | Real estate | 2023 |
| DNK Ceiling Ltd | Construction | 2022 |
| DNK Trading Limited | Financial services | 2005 |
| DNL Trans Ltd | Transport & logistics | 2015 |
| DNR Haulier Ltd | Transport & logistics | 2024 |
| DO AS YOU ARE Told Limited | Professional & scientific | 2025 |
| Dobe Express Ltd | Transport & logistics | 2023 |
| Docujuris Ltd | Information & communication | 2025 |
| Dodds Fencing Ltd | Administrative & support | 2022 |
| Dodds Tree Services Ltd | Administrative & support | 2025 |
| Dofads Ltd | Real estate | 2021 |
| Dog Security Ltd | Administrative & support | 2018 |
| Doji Spectrum Limited | Real estate | 2025 |
| Dolitom Ltd | Financial services | 2024 |
| Dollycoss Ltd | Transport & logistics | 2025 |
| DOM Interiors (UK) Ltd | Construction | 2012 |
| Domangels Ltd | Health & social care | 2020 |
| Domdiv Limited | Public administration | 2024 |
| Domestic & Genial Repairs Ltd | Other services | 2023 |
| Dominion City Woolwich Ltd | Other services | 2025 |
| Dominion Management Consultants Limited | Information & communication | 2009 |
| Donabor Global Services (UK) Ltd | Professional & scientific | 2024 |
| Donald Briggs Development Limited | Construction | 2025 |
| Donl Carpentry & Flooring Ltd | Construction | 2020 |
| DOO DAS (Canterbury) Limited | Other services | 2022 |
| DOO DAS (Loose) Limited | Other services | 2022 |
| DOO DAS (Maidstone) Limited | Other services | 2022 |
| Doozy Cuts Limited | Other services | 2024 |
| DORAB2012 Ltd | Other services | 2026 |
| Doras I.E Ltd | Manufacturing | 2025 |
| Dorex Technologies Limited | Information & communication | 2013 |
| Dorteller Limited | Hospitality | 2017 |
| Dosanjh Assets Ltd | Real estate | 2026 |
| Dosanjh Double Glazing Ltd | Construction | 2023 |
| Doskin Limited | Other services | 2023 |
| DOT Dash Media Ltd | Professional & scientific | 2026 |
| DOT Lynch Construction Ltd | Construction | 2022 |
| Dotgra Ltd | Wholesale & retail | 2024 |
| DOTRANS90 Ltd | Transport & logistics | 2021 |
| Double G Gaming Ltd | Other services | 2018 |
| Dowling Demo & Recycling Ltd | Water & waste | 2025 |
| Downtown Chauffeurs Ltd | Transport & logistics | 2025 |
| Dows Media Limited | Information & communication | 2023 |
| DPS Heating Services Ltd | Construction | 2024 |
| DPS Printing & Fulfilment Ltd | Manufacturing | 2018 |
| DPZ Parlour Limited | Other services | 2021 |
| DR Aneka Ltd | Health & social care | 2018 |
| DR Reckeweg (UK) Limited | Administrative & support | 1990 |
| Dracouk Limited | Construction | 2017 |
| Dragon Express Ltd | Hospitality | 2023 |
| Dragus Construction Ltd | Construction | 2023 |
| Drainage & Transport Ltd | Water & waste | 2025 |
| Drainage Consultants Limited | Water & waste | 1994 |
| Drainage Solutions Limited | Extraterritorial | 2001 |
| Draper & Sons Ltd | Other services | 2014 |
| Dream Incorporation Limited | Construction | 2000 |
| Dream Renovation Limited | Construction | 2025 |
| Dreamdesigndevelop Ltd | Professional & scientific | 2022 |
| Dreamers Consultancy Ltd | Administrative & support | 2024 |
| Dreamers Management Ltd | Professional & scientific | 2020 |
| Drinas Electrical Ltd | Construction | 2016 |
| Drinec Ltd | Construction | 2024 |
| Dripapparel Ltd | Wholesale & retail | 2025 |
| Driscoll QS Ltd | Professional & scientific | 2024 |
| Driven by Elves Ltd | Transport & logistics | 2023 |
| Drivestylers Ltd | Construction | 2017 |
| Driving UP Ltd | Transport & logistics | 2024 |
| DRK Estates Ltd | Real estate | 2026 |
| DRL 25 Limited | Transport & logistics | 2025 |
| Dronetek Ltd | Professional & scientific | 2015 |
| Drop at Door Ltd | Wholesale & retail | 2024 |
| Drsmarineservice Limited | Other services | 2015 |
| DRW Salons Ltd | Other services | 2018 |
| DRY Homes Solutions Ltd | Construction | 2026 |
| Drysite Limited | Construction | 2010 |
| DS Bath Construction Services Limited | Construction | 2024 |
| DS Waterproofing & Maintenance Ltd | Construction | 2024 |
| DSC Logistics Services Limited | Professional & scientific | 2012 |
| DSG Group Holdings Ltd | Financial services | 2023 |
| DSG Trans Ltd | Transport & logistics | 2012 |
| DSS Roofing Limited | Construction | 2025 |
| DTD Activities Ltd | Other services | 2019 |
| DTD Home Improvements Ltd | Construction | 2026 |
| DTD IT Limited | Administrative & support | 2017 |
| Dthirdeye Solutions Limited | Information & communication | 2018 |
| Dtillad Ltd | Professional & scientific | 2019 |
| Duage Consults Ltd | Education | 2024 |
| Dubz Audio Limited | Information & communication | 2014 |
| Duduserg Recruit Ltd | Administrative & support | 2025 |
| Duffield Building Contractors Ltd | Construction | 2022 |
| Duhastore Ltd | Wholesale & retail | 2026 |
| Dul-Truck Ltd | Transport & logistics | 2018 |
| Dulla Estate Ltd | Real estate | 2024 |
| Dunamis Lane Limited | Health & social care | 2018 |
| Duncan & Co Estates Ltd | Real estate | 2023 |
| Dunnamis Limited | Health & social care | 2013 |
| Dunstan Blake Ltd | Construction | 2021 |
| Dutatras Ltd | Transport & logistics | 2026 |
| DV Building Ltd | Construction | 2010 |