| Detail 4U Ltd | Manufacturing | 2022 |
| Detailed Autos Valeting & Detailing Limited | Wholesale & retail | 2025 |
| Detertech Holdings Europe Limited | Administrative & support | 2007 |
| Detertech Holdings Limited | Professional & scientific | 1994 |
| Detertech UK Limited | Professional & scientific | 1993 |
| Development Appraisals Limited | Information & communication | 2021 |
| Devonshire Cartwright Ltd | Real estate | 2025 |
| Devport Ltd | Other services | 2020 |
| Dewlink Sludge Treatment Ltd | Manufacturing | 2016 |
| Deyin Event Management Ltd | Information & communication | 2022 |
| Df&L Limited | Information & communication | 2022 |
| DFL Productions Ltd | Arts & recreation | 2026 |
| DGB Bars Liverpool Ltd | Hospitality | 2020 |
| DGB Hospitality Group Ltd | Professional & scientific | 2023 |
| DGB Pubs Wirral Ltd | Hospitality | 2020 |
| DGE Properties Ltd | Real estate | 2022 |
| DGN Care Ltd | Health & social care | 2025 |
| DGN Property Ltd | Real estate | 2025 |
| Dhaliwal Prime Estates Ltd | Real estate | 2024 |
| Dhatt Investments Ltd | Real estate | 2018 |
| DHD & Associates Limited | Professional & scientific | 2020 |
| Dhindsa Brickwork Ltd | Manufacturing | 2024 |
| Diamond Swim Academy Ltd | Education | 2014 |
| Diamond Tyres & Car Wash Ltd | Wholesale & retail | 2026 |
| Diamond Vizta Property Group Ltd | Construction | 2024 |
| Dianon Ltd | Other services | 2020 |
| Dicky's Maintenance Ltd | Construction | 2025 |
| Diesel Express Ltd | Wholesale & retail | 2009 |
| DIFCON1 Ltd | Professional & scientific | 2022 |
| Different Animal Ltd | Wholesale & retail | 2026 |
| Different Dog Limited | Manufacturing | 2017 |
| Digi Tariff Ltd | Wholesale & retail | 2025 |
| Digicare Limited | Other services | 2004 |
| Digiland EOT Limited | Professional & scientific | 2023 |
| Digiland Group Limited | Wholesale & retail | 2023 |
| Digiland Limited | Wholesale & retail | 2006 |
| Digital Accessibility Solutions LLP | | 2024 |
| Digital Media Telford Limited | Information & communication | 2018 |
| Digitally Optimize Ltd | Administrative & support | 2022 |
| Digitania Ltd | Other services | 2020 |
| Dillon Scott Solutions Limited | Administrative & support | 2018 |
| Dilo Barber Ltd | Other services | 2026 |
| Dimicorn Ltd | Other services | 2020 |
| Dimorf Ltd | Other services | 2018 |
| Dinsdale Lindthorpe Limited | Information & communication | 2016 |
| Direct Automation Limited | Manufacturing | 2003 |
| Direct Freight Logistics Limited | Extraterritorial | 2003 |
| Direct Suites Ltd | Wholesale & retail | 2023 |
| Direct Vacuum Limited | Manufacturing | 2017 |
| Direct Vehicle Solutions Group Ltd | Administrative & support | 2026 |
| Discount Goods Limited | Wholesale & retail | 2023 |
| Discreet Pest Control Midlands Ltd | Administrative & support | 2026 |
| Distance Education (International) Ltd | Wholesale & retail | 2011 |
| Ditalk Ltd | Other services | 2020 |
| Ditkburn Ltd | Administrative & support | 2020 |
| Divaxil Ltd | Other services | 2020 |
| Divergent Projects Ltd | Construction | 2024 |
| Divertis Ltd | Transport & logistics | 2022 |
| Divine RAY Healthcare Limited | Health & social care | 2025 |
| Divisha Limited | Information & communication | 2020 |
| Diwebs Ltd | Other services | 2020 |
| Dixon Brothers NO 2 Limited | Real estate | 1997 |
| Dixon Commercial Limited | Wholesale & retail | 1998 |
| DJ Trade Ltd | Information & communication | 2014 |
| DJR Interpreting Ltd | Professional & scientific | 2025 |
| DJS Media Limited | Information & communication | 2008 |
| DKH Autos Ltd | Wholesale & retail | 2024 |
| DKM Construction Ltd | Construction | 2025 |
| DKO Group Limited | Real estate | 2024 |
| DKS Consult Ltd | Information & communication | 2024 |
| DL Events Manchester Ltd | Hospitality | 2024 |
| DLA Property Ltd | Real estate | 2024 |
| DLK Logistics Group Ltd | Transport & logistics | 2025 |
| DLN Logistics Limited | Extraterritorial | 2024 |
| DLR Maintenance Limited | Administrative & support | 2026 |
| DLS Contractors Ltd | Construction | 2022 |
| Dmdl Limited | Manufacturing | 2004 |
| DMF Investments Limited | Professional & scientific | 2013 |
| DMG Group Ltd | Real estate | 2017 |
| DMH Heating & Plumbing Ltd | Construction | 2021 |
| Dmsc Properties Ltd | Real estate | 2021 |
| DMZ Strategic Advisory Ltd | Information & communication | 2026 |
| DNO Automotive Ltd | Wholesale & retail | 2024 |
| DO Construction Ltd | Construction | 2015 |
| Dock Technik Ltd | Manufacturing | 2020 |
| Dockta Ltd | Other services | 2020 |
| Doftek Ltd | Manufacturing | 2025 |
| Doggy Pals Grooming Parlour Ltd | Other services | 2024 |
| Dogmatic (UK) Limited | Wholesale & retail | 2006 |
| Dogtran Limited | Professional & scientific | 2010 |
| Dolax Ltd | Other services | 2019 |
| Dolet Ltd | Other services | 2020 |
| Dolid Ltd | Wholesale & retail | 2019 |
| Dolphin Global Limited | Other services | 2022 |
| Dominic Milne Marketing Ltd | Information & communication | 2019 |
| Domion Trans Ltd | Transport & logistics | 2025 |
| Domoni Trans Ltd | Transport & logistics | 2025 |
| Don'T Move Just Improve Limited | Other services | 2018 |
| Donetronics Ltd. | Manufacturing | 2024 |
| Donnay Ltd | Construction | 2018 |