| DUO Heating & Renewables Ltd | Construction | 2023 |
| Duomed Holding UK Ltd | Professional & scientific | 2021 |
| Duomed Medical UK Limited | Wholesale & retail | 2019 |
| Dupital Ltd | Information & communication | 2025 |
| Duppy Gunly Limited | Financial services | 2015 |
| Durabytes Limited | Information & communication | 2024 |
| Durand Mortgage Solutions Ltd | Financial services | 2024 |
| Duravault Limited | Construction | 2021 |
| Duraxis Ltd | Wholesale & retail | 2023 |
| Duri.Tools Ltd | Wholesale & retail | 2023 |
| Durian Properties Limited | Real estate | 2025 |
| Durkan and Durkan Ltd | Health & social care | 2018 |
| Durkin Homes Ltd | Real estate | 2016 |
| Durley Shopfitting Contractors Limited | Construction | 2010 |
| Duro Group Ltd | Wholesale & retail | 2022 |
| Durol Services Ltd | Health & social care | 2015 |
| Durrenza Ltd | Wholesale & retail | 2025 |
| Dursull Limited | Construction | 2017 |
| Durty O Dwyer Ltd | Hospitality | 2025 |
| Dusk (Retail) Limited | Wholesale & retail | 2016 |
| Dust in the Blood Ltd | Information & communication | 2010 |
| Dust to Dwell Ltd | Real estate | 2026 |
| Dusted and Discovered Limited | Wholesale & retail | 2025 |
| Dutchie Leeds Ltd | Hospitality | 2022 |
| Dutco Bruntsfield Holding Limited | Financial services | 2024 |
| Dutco UK Holding Limited | Financial services | 2023 |
| Dutopia Group Limited | Financial services | 2018 |
| Dutt Property Group Limited | Real estate | 2024 |
| Dutton Property Group Limited | Real estate | 2023 |
| Dutton QS Ltd | Professional & scientific | 2018 |
| Dutty Scran Limited | Hospitality | 2025 |
| Dutycrest Ltd | Administrative & support | 2026 |
| DUV Solutions Limited | Real estate | 2016 |
| Duvas Group Ltd | Transport & logistics | 2017 |
| DV News Ltd | Wholesale & retail | 2022 |
| DVB Direct Ltd | Information & communication | 2009 |
| DVJ Property Services Ltd | Real estate | 2026 |
| DVM Fire and Security Ltd | Manufacturing | 2023 |
| DVS Driving School PVT Ltd | Education | 2026 |
| DVS Technics Limited | Manufacturing | 2017 |
| DW Fleet Solutions Limited | Wholesale & retail | 2023 |
| DW GAS Solutions Ltd | Energy | 2021 |
| DW Health Solutions Limited | Health & social care | 2023 |
| DW Hris Consultancy Limited | Information & communication | 2016 |
| DW Pearson Limited | Administrative & support | 2011 |
| DW Prestige Flooring & Joinery Ltd | Construction | 2019 |
| DW002 Limited | Professional & scientific | 2018 |
| Dwco Limited | Professional & scientific | 2021 |
| Dwell Leeds Limited | Real estate | 2012 |
| Dwellfox UK Ltd | Information & communication | 2023 |
| Dwelling Place Care Ltd | Health & social care | 2020 |
| Dwellings Homes Limited | Real estate | 2021 |
| Dwelluxe Properties Ltd | Real estate | 2024 |
| Dwilkinson&Company Limited | Professional & scientific | 2024 |
| DWN Consultancy Limited | Professional & scientific | 2019 |
| DWR Business and Management Services Ltd | Professional & scientific | 2018 |
| DWX Ltd | Transport & logistics | 2017 |
| Dwyz Ltd | Information & communication | 2026 |
| DXB Investments Ltd | Real estate | 2025 |
| DXL Properties Ltd | Real estate | 2024 |
| Dxnby Ltd | Information & communication | 2024 |
| Dxrkaii Inc Ltd | Information & communication | 2025 |
| DY Electrical Ltd | Construction | 2022 |
| Dyako Bar Ltd | Hospitality | 2022 |
| Dyar Limited | Hospitality | 2023 |
| Dyari Stop N Shop Ltd | Wholesale & retail | 2025 |
| Dyay Ltd | Real estate | 2024 |
| Dyework Enterprise Ltd | Hospitality | 2025 |
| DYJ Limited | Real estate | 2021 |
| Dylans Takeaway Ltd | Hospitality | 2024 |
| Dynamic Approach Limited | Information & communication | 2013 |
| Dynamic Balancing Services Limited | Professional & scientific | 1994 |
| Dynamic Business Services Limited | Information & communication | 1999 |
| Dynamic Cleaning Solutions Limited | Administrative & support | 2021 |
| Dynamic Decor Ltd | Construction | 2020 |
| Dynamic Foods Worldwide Ltd | Wholesale & retail | 2013 |
| Dynamic Healthcare Services Limited | Administrative & support | 2017 |
| Dynamic Horizon Property Ltd | Real estate | 2025 |
| Dynamic Networks Group Holdings Limited | Financial services | 2022 |
| Dynamic Networks Group Limited | Information & communication | 2009 |
| Dynamic Networks Holdings Limited | Information & communication | 2018 |
| Dynamic Networks Limited | Information & communication | 2016 |
| Dynamic Pizza 2 Ltd | Hospitality | 2023 |
| Dynamic Pizza 3 Ltd | Hospitality | 2023 |
| Dynamic Pizza 4 Ltd | Hospitality | 2023 |
| Dynamic Pizza Limited | Hospitality | 2023 |
| Dynamic Property Connections Limited | Real estate | 2026 |
| Dynamic Property Maintenance & Renovations Ltd | Construction | 2022 |
| Dynamic Secure Consulting Ltd | Professional & scientific | 2017 |
| Dynamic Social Support Limited | Health & social care | 2017 |
| Dynamic Trades Limited | Wholesale & retail | 2024 |
| Dynamics 365 Cloud Limited | Information & communication | 2017 |
| Dynamicstyle Ltd | Wholesale & retail | 2025 |
| Dynamifix (Yorkshire) Limited | Wholesale & retail | 2010 |
| Dynamifix Europe Limited | Wholesale & retail | 2012 |
| Dynamifix Limited | Wholesale & retail | 2006 |
| Dynamite Ventures Ltd | Real estate | 2022 |
| Dynamo Accounts Limited | Professional & scientific | 2019 |
| Dynamo Foods Ltd | Hospitality | 2021 |
| Dynamo Park Management Company Limited | Households | 2025 |