| Decor Systems Limited | Administrative & support | 2011 |
| Decorative Gardens Limited | Wholesale & retail | 2015 |
| Decoy Design Limited | Real estate | 2017 |
| DED Transport Ltd | Transport & logistics | 2024 |
| Dedicated Home Cinema Limited | Professional & scientific | 2020 |
| Dedicated Technology Limited | Construction | 2023 |
| Deeks VAT Consultancy Ltd | Professional & scientific | 2018 |
| Deen Body Repair Ltd | Wholesale & retail | 2025 |
| Deen Builders Limited | Construction | 2025 |
| Deen Food Import-Export Ltd | Other services | 2008 |
| Deen Food Investment Ltd | Other services | 2008 |
| Deep Blue Leisure Limited | Information & communication | 2002 |
| Deep H2O Ltd. | Financial services | 2018 |
| Deeper Development Limited | Information & communication | 2021 |
| Deeper Than Blue Legacy Projects Limited | Other services | 2016 |
| Deeply Design Limited | Professional & scientific | 2009 |
| Deerfast Associates Capital Limited | Professional & scientific | 2018 |
| Default Dawn Ltd | Extraterritorial | 2026 |
| Defender Safety Decking Ltd | Construction | 2026 |
| Defined Bespoke Interiors Limited | Manufacturing | 2025 |
| Defined Cosmetics Ltd | Wholesale & retail | 2026 |
| Definn Ltd | Wholesale & retail | 2025 |
| Degg Investments Limited | Real estate | 2026 |
| DEH Engineering Ltd | Professional & scientific | 2024 |
| Deitrans Limited | Administrative & support | 2015 |
| Deja Brew (Doncaster) Limited | Hospitality | 2022 |
| Dekko Ltd | Professional & scientific | 2020 |
| Deks Properties Limited | Real estate | 2026 |
| DEL Porto Ltd | Arts & recreation | 2017 |
| Delal Pizza Limited | Hospitality | 2025 |
| Delaney & Salter Ltd | Construction | 2021 |
| Delaney & Salter Property Ltd | Real estate | 2022 |
| Delaney Automotive Training Ltd | Administrative & support | 2026 |
| Delaport Limited | Wholesale & retail | 2003 |
| Delci Limited | Transport & logistics | 2020 |
| Deld Holdings Limited | Financial services | 2025 |
| Delg Logistic Ltd | Transport & logistics | 2020 |
| Delightful Desserts Limited | Hospitality | 2024 |
| Deliverytransport Limited | Transport & logistics | 2024 |
| Delizio Pizzeria Limited | Hospitality | 2025 |
| Dell's Dogs Ltd | Professional & scientific | 2024 |
| Delta Driving School Ltd | Education | 2025 |
| Delta Plastering Limited | Construction | 2006 |
| Delta Salvage Limited | Administrative & support | 2000 |
| Delvebright Limited | Construction | 1991 |
| DEM Waste Limited | Water & waste | 2025 |
| Dema Projects Services Limited | Professional & scientific | 2026 |
| Demaglass Tableware Limited | Professional & scientific | 1989 |
| Demain Estates Limited | | 1985 |
| Demax Concepts Limited | Construction | 2018 |
| Demax One Limited | Financial services | 2019 |
| Demex Environmental Ltd | Water & waste | 2026 |
| Demex Holdings Limited | Construction | 2026 |
| Demircioglu Design Ltd | Manufacturing | 2021 |
| Demon Guitars Ltd | Wholesale & retail | 2025 |
| Demon Time Ltd | Arts & recreation | 2026 |
| Demotech Belgium Ltd | Administrative & support | 2008 |
| Demure Diamonds Limited | Wholesale & retail | 2025 |
| DEN Group Ltd | Wholesale & retail | 2023 |
| Denaby Hand Car Wash Ltd | Other services | 2019 |
| Denaby United F.C. Limited | Arts & recreation | 2016 |
| Denar North Ltd | Wholesale & retail | 2024 |
| Denby & Fenwick Courts RTM Company Limited | Households | 2007 |
| Dencare Group Limited | Other services | 2015 |
| Dencaw Security Ltd | Information & communication | 2025 |
| Denehaven Limited | Real estate | 2007 |
| Denim Property Ltd | Real estate | 2022 |
| Deniz Pizza Limited | Hospitality | 2025 |
| Denlev Limited | Professional & scientific | 2012 |
| Denman Utilities Ltd | Construction | 2018 |
| Dennis Drive Ltd | Transport & logistics | 2024 |
| Dennis Fish Bar Ltd | Hospitality | 2023 |
| Dennis International Holdings Ltd | Wholesale & retail | 2025 |
| Denoric Group Limited | Wholesale & retail | 2025 |
| Denos Consulting Ltd | Financial services | 2024 |
| Dent Devils (Doncaster) Ltd | Wholesale & retail | 2017 |
| Dent MAN Direct Limited | Wholesale & retail | 2004 |
| Dent Removal Limited | Administrative & support | 2006 |
| Dent-De-Leone Limited | Information & communication | 2015 |
| Denton & Nickels Limited | Extraterritorial | 2019 |
| Denton Nickels (UK) Limited | Construction | 2011 |
| Dentsout (Doncaster) Limited | Wholesale & retail | 2003 |
| DEP Properties Ltd | Construction | 2026 |
| DEP Property Services Ltd | Construction | 2013 |
| Derby & Co 2 Ltd | Financial services | 2024 |
| Derby & Co Developments Limited | Construction | 2020 |
| Derbyshire Waste Limited | Water & waste | 1991 |
| Derek Lewis Contract Limited | Administrative & support | 2023 |
| Derek Lewis Limited | Construction | 1973 |
| Derwent Recycling Services Limited | Water & waste | 2006 |
| Deryist Ltd | Wholesale & retail | 2020 |
| Descars Limited | Wholesale & retail | 2003 |
| Design & Build 2022 Ltd | Construction | 2012 |
| Design & Development Innovators Limited | Professional & scientific | 2012 |
| Design 3 Architecture & Urban Design Ltd. | Professional & scientific | 2024 |
| Design 3 Construction Ltd | Construction | 2025 |
| Design 3 Rail & Civil Engineering Ltd | Construction | 2025 |
| Design and Attract Limited | Information & communication | 2011 |
| Design by Aesthetics Limited | Information & communication | 2016 |
| Design by Fuel Limited | Information & communication | 2016 |