| Dryfe Limited | Construction | 2021 |
| Dryline Pro NV Ltd | Construction | 2026 |
| Drywall Contracts Ltd | Construction | 2014 |
| DS & RS Poone Investment Properties Limited | Real estate | 2026 |
| DS (Northampton) Limited | Construction | 2025 |
| DS Communications Ltd | Information & communication | 2024 |
| DS Eleven Development Limited | Real estate | 2019 |
| DS Eleven Holding Limited | Real estate | 2019 |
| DS Eleven Investments Limited | Real estate | 2017 |
| DS Eleven Property Group Limited | Real estate | 2019 |
| DS Project Management (Northampton) Limited | Construction | 2025 |
| DS Residential Agency Ltd | Real estate | 2024 |
| Ds-Eb Design Limited | Professional & scientific | 2019 |
| DSA Group Limited | Professional & scientific | 2002 |
| DSA Welding Ltd | Manufacturing | 2021 |
| Dsan Systems Ltd | Information & communication | 2015 |
| DSB Concept Design Ltd | Professional & scientific | 2018 |
| DSB Electrical Ltd | Construction | 2024 |
| Dsb.Net Ltd | Administrative & support | 2009 |
| DSC Events Ltd | Wholesale & retail | 2022 |
| DSE Brickwork Limited | Construction | 2025 |
| DSE Trans Limited | Construction | 2016 |
| DSF Quality Care Services Ltd | Health & social care | 2020 |
| DSG Haulage Ltd | Transport & logistics | 2019 |
| DSH Kingsley Limited | Hospitality | 2022 |
| DSJ Project Management Limited | Extraterritorial | 2008 |
| Dsouza Creative Production Ltd | Information & communication | 2026 |
| DST GB Limited | Transport & logistics | 2008 |
| DST Renovations Ltd | Construction | 2023 |
| DT Compressor Services Limited | Manufacturing | 1995 |
| DT Compressors (Leicester) Limited | Manufacturing | 2020 |
| DT Express Limited | Construction | 2024 |
| DT Imaging Ltd | Professional & scientific | 2016 |
| DT Infra Ltd | Professional & scientific | 2025 |
| DT Music Limited | Arts & recreation | 2021 |
| DT Nationwide Ltd | Transport & logistics | 2022 |
| DT Services (Northampton) Limited | Construction | 2011 |
| DTC Catering Ltd | Hospitality | 2026 |
| Dtdd Holdings Limited | Financial services | 2025 |
| Dtdd Ltd | Health & social care | 2017 |
| Dtfm Ltd | Construction | 2026 |
| DTJ Autobody Repairs Ltd | Wholesale & retail | 2018 |
| Dtmi Limited | Other services | 2017 |
| DTP Surveyors Limited | Professional & scientific | 2025 |
| DTR Electrical Supplies Ltd | Wholesale & retail | 2016 |
| DTR Outlets Ltd | Wholesale & retail | 2024 |
| Dtronix Limited | Administrative & support | 2008 |
| DUA Technology Ltd | Information & communication | 2026 |
| Duaah Limited | Wholesale & retail | 2025 |
| Dual Seal Ltd | Administrative & support | 2018 |
| Duality Studio Limited | Information & communication | 2017 |
| Duarte Corporation Ltd. | Professional & scientific | 2017 |
| Duchem UK Limited | Hospitality | 2023 |
| Duchy Plant Hire Ltd | Administrative & support | 2018 |
| Duckdash Ltd | Arts & recreation | 2025 |
| Ductio Ltd | Information & communication | 2026 |
| Ductmann Limited | Energy | 1994 |
| Ductwork Solutions Ltd | Construction | 2025 |
| Ductz Holdings Limited | Financial services | 2023 |
| Ductz Services Limited | Professional & scientific | 2008 |
| Duda Transport Logistics Ltd | Transport & logistics | 2025 |
| Duddy Hire Ltd | Wholesale & retail | 2025 |
| Dudek Transport Ltd | Transport & logistics | 2015 |
| Dudu Recruitment Limited | Manufacturing | 2022 |
| Duet Asset Management Limited | Financial services | 1999 |
| Dufeu Managed Print Solutions Limited | Manufacturing | 2019 |
| Duif Flowers Ltd | Wholesale & retail | 2021 |
| Duiu Construction Ltd | Construction | 2026 |
| Dukami Ltd | Transport & logistics | 2020 |
| Dukes View Music Ltd | Information & communication | 2016 |
| Dulal Investments Ltd | Real estate | 2024 |
| Dumbleton Limited | Financial services | 2016 |
| DUMICONSTRUCTION9 Ltd | Construction | 2025 |
| Dumim Limited | Health & social care | 2021 |
| Dumitru B.V Construction Ltd | Construction | 2022 |
| Dumy Logistic Transport Ltd | Transport & logistics | 2022 |
| Duna Aviation Limited | Administrative & support | 2022 |
| Duna Consulting Limited | Construction | 2017 |
| Dunbeath Properties Ltd | Real estate | 2019 |
| Duncan Hopwood Limited | Professional & scientific | 1990 |
| Duncan Oliver Construction Limited | Construction | 2007 |
| Duncan Webster Technical Services Limited | Professional & scientific | 2020 |
| Dundee Court Management Limited | Households | 1997 |
| Dunesk Engineering Services Ltd | Professional & scientific | 2025 |
| Dunish Haulage Ltd Ltd | Transport & logistics | 2022 |
| Dunkz Limited | Wholesale & retail | 2025 |
| Dunn Kirk Consultancy Limited | Administrative & support | 2015 |
| Dunn Motor Company Limited | Wholesale & retail | 1995 |
| Duns Scotus Trust | Education | 2013 |
| Dunster Development Projects Ltd | Construction | 2023 |
| Dunster Living Ltd | Construction | 2024 |
| Dunster's Mead Management Limited | Households | 1991 |
| Dunston Capital (Property) Limited | Real estate | 2025 |
| Dunston Capital (Property) Portfolio 1 Limited | Real estate | 2025 |
| Dunston Capital (Property) Portfolio 2 Limited | Real estate | 2025 |
| Dunston Capital Ventures Limited | Real estate | 2025 |
| Dunton Developments Ltd | Construction | 2025 |
| DUO Transport Ltd | Transport & logistics | 2024 |
| Duogb Limited | Manufacturing | 1989 |
| Duolumino Estates Ltd | Real estate | 2023 |