| DSS Collective Ltd | Administrative & support | 2025 |
| DST Properties Limited | Real estate | 2015 |
| Dstt Group Ltd | Professional & scientific | 2026 |
| DT Adhd Services Ltd | Health & social care | 2026 |
| DT Chung Services Ltd | Administrative & support | 2014 |
| DT Does FBA Ltd | Wholesale & retail | 2024 |
| DT Healthcare Solutions Ltd | Health & social care | 2023 |
| DT Hughes Foundation CIC | Construction | 2024 |
| DT Investments (NW) Limited | Arts & recreation | 2019 |
| DT Projects Holding Ltd | Real estate | 2026 |
| DT Properties (Liverpool) Ltd | Real estate | 2022 |
| DT Property Solutions Ltd | Real estate | 2018 |
| DT Rapid Holdings Limited | Financial services | 2019 |
| DT Scaffolding Limited | Construction | 2019 |
| DT Stylist Ltd | Professional & scientific | 2026 |
| Dt&F Property Limited | Real estate | 2023 |
| DTB Business Solutions Limited | Professional & scientific | 2016 |
| DTB Property Group Ltd | Real estate | 2025 |
| DTC 888 LLP | | 2022 |
| Dtch Ltd | Hospitality | 2019 |
| DTG Developments Limited | Real estate | 2020 |
| DTJ Landscapes Ltd | Administrative & support | 2023 |
| DTK Commissioning Ltd | Professional & scientific | 2024 |
| DTM Consulting Ltd | Professional & scientific | 2025 |
| Dtmcl Limited | Real estate | 2016 |
| DTR Vehicle Services Ltd | Wholesale & retail | 2025 |
| DTS Convenience Ltd | Wholesale & retail | 2024 |
| DTS Investments (NW) Ltd | Financial services | 2025 |
| DTS Logistic Services Limited | Transport & logistics | 2025 |
| DTT Properties Limited | Real estate | 2018 |
| Dtwn Liverpool Limited | Hospitality | 2026 |
| Dual Pixel Ltd | Information & communication | 2018 |
| Duality Audio Ltd | Professional & scientific | 2013 |
| Dualog UK Limited | Information & communication | 2007 |
| Duangdee Ttmsg Ltd | Health & social care | 2022 |
| DUB BMX Ltd | Wholesale & retail | 2013 |
| Dubai Convenience Limited | Wholesale & retail | 2023 |
| Dubai Market Ltd | Wholesale & retail | 2025 |
| Dubai Store L4 Ltd | Wholesale & retail | 2026 |
| Dubaidessertz Limited | Hospitality | 2025 |
| Dubaily Holdings Ltd | Real estate | 2025 |
| Dubetech Ltd | Information & communication | 2025 |
| Dubois Group Ltd | Information & communication | 2025 |
| DUBVEG4 Limited | Professional & scientific | 2025 |
| Duchrae Forestry LLP | | 2022 |
| Ducie Street Developments Ltd | Construction | 2017 |
| Duck Electrical Services Ltd | Construction | 2011 |
| Ducky Fuzz Productions Ltd | Information & communication | 2023 |
| Ductech Ltd | Information & communication | 2014 |
| Ductvent Ltd | Construction | 2020 |
| Duddon Management Limited | Real estate | 2004 |
| Dudes & Dolls Playden CIC | Health & social care | 2024 |
| Dudley (NW) Ltd | Administrative & support | 2025 |
| Dudlow Court Management (Liverpool) Limited | Households | 1968 |
| Dudlow Grange (Management) Limited | Hospitality | 1975 |
| Dudlow Housing Ltd | Households | 1998 |
| Duducamazon Ltd | Manufacturing | 2024 |
| DUE Amici A&A Ltd | Hospitality | 2025 |
| DUE Diligence Design UK Ltd | Professional & scientific | 2019 |
| Duffy Wright Estates Limited | Real estate | 2024 |
| Dufour Services Limited | Professional & scientific | 2025 |
| Dukas Properties Limited | Real estate | 1987 |
| Duke Developments Ltd | Administrative & support | 2017 |
| Duke Plant Training Ltd | Education | 2024 |
| Duke Street Food & Drink Market Limited | Wholesale & retail | 2017 |
| Duke Street Hotel Limited | Construction | 2019 |
| Duke Utility Solutions Ltd | Water & waste | 2019 |
| Dulac Data Ltd | Information & communication | 2020 |
| Dulas Meadow Limited | Hospitality | 2022 |
| Dulce Armonia Ltd | Manufacturing | 2024 |
| Dulce Distinct Ltd | Health & social care | 2023 |
| Duman Bold Street Ltd | Hospitality | 2022 |
| Dumitrascu Trans Ltd | Transport & logistics | 2019 |
| Dumitru Transport Ltd | Transport & logistics | 2016 |
| Dumpat Global Ltd | Wholesale & retail | 2021 |
| Dumpling House Limited | Hospitality | 2022 |
| Dumpling Time Limited | Hospitality | 2024 |
| Duna 19 Company Ltd | Wholesale & retail | 2019 |
| Duna Barber Ltd | Other services | 2021 |
| Dunbar Project Management Ltd | Professional & scientific | 2026 |
| Duncan Street Homes Limited | Construction | 2025 |
| Duncans Ltd | Wholesale & retail | 2021 |
| Duncans Motors Ltd | Administrative & support | 2023 |
| Dundee Group (NI) Ltd. | Professional & scientific | 2009 |
| Dundee Holdings Unlimited | Professional & scientific | 2022 |
| Dundee Hotel Limited | Administrative & support | 2012 |
| Dundee Residential (1) Limited | Real estate | 2020 |
| Dundrain Civils Ltd | Construction | 2020 |
| Dune Kitchens Limited | Construction | 2023 |
| Dunes Property Services Limited | Households | 2025 |
| Dunham Development Services Ltd | Real estate | 2024 |
| Dunia Build Ltd | Construction | 2025 |
| Dunkleys Limited | Professional & scientific | 1993 |
| Dunkleys Pies Limited | Professional & scientific | 1948 |
| Dunlop Textiles Limited | Manufacturing | 1919 |
| Dunmere Capital Limited | Financial services | 2026 |
| Dunne Surgical Ltd | Health & social care | 2024 |
| Dunnscot Ltd | Real estate | 2024 |
| Dunnys Liverpool Ltd | Hospitality | 2022 |
| Dunraven Recruitment Limited | Administrative & support | 2023 |