| Dreamscape/ Landscaping and Groundworks Ltd | Administrative & support | 2011 |
| Dreamscreen Productions Limited | Information & communication | 2014 |
| Dreamwave Ltd | Information & communication | 2023 |
| Dreamwave Solutions Ltd | Information & communication | 2020 |
| Dredwulf Enterprises Ltd | Information & communication | 2023 |
| Dressing Room Ltd | Administrative & support | 2025 |
| Drewitt Construction Services Ltd | Construction | 2018 |
| Drewlec Limited | Construction | 1964 |
| Drewsons Limited | Real estate | 1959 |
| Drey House Investments Ltd | Financial services | 2022 |
| Drft Solutions Ltd | Information & communication | 2024 |
| DRG Roller Derby Ltd | Arts & recreation | 2026 |
| DRH Property Consultancy Limited | Real estate | 2015 |
| Drift Stationary Limited | Wholesale & retail | 2025 |
| Driftwood Byron Road Limited | Households | 2016 |
| Driftwood Investments Limited | Real estate | 2023 |
| Driftwood RTM Company Limited | Households | 2020 |
| Drilet Ltd | Real estate | 2015 |
| Drink on the Canal Ltd | Hospitality | 2025 |
| Driven Technologies Ltd | Information & communication | 2024 |
| Drivesoc Ltd | Information & communication | 2025 |
| DRJ Residential Limited | Real estate | 2024 |
| Drjc Limited | Financial services | 2022 |
| Drone Services Dorset Limited | Professional & scientific | 2020 |
| DRPLUS5 Consulting Limited | Information & communication | 2015 |
| DRS Group Ltd | Construction | 2025 |
| Druitts Limited | Professional & scientific | 2010 |
| Druma Logistic Ltd | Transport & logistics | 2023 |
| Drummond 74 RTM Limited | Real estate | 2013 |
| DRY Homes Nationwide Ltd | Construction | 2025 |
| DRY Proprietas Ltd | Real estate | 2025 |
| DRY Skills Ltd | Administrative & support | 2019 |
| Dryplast (Fareham) Limited | Professional & scientific | 2003 |
| Dryplast (Poole) Limited | Construction | 1992 |
| Dryplast Fire Protection Limited | Construction | 1996 |
| Drywall Systems Construction Limited | Construction | 2018 |
| DS Capital Holdings Limited | Financial services | 2021 |
| DS Costa Group Limited | Real estate | 2022 |
| DS People Ltd | Administrative & support | 2022 |
| DS Services Bournemouth Limited | Administrative & support | 2021 |
| Dsar Properties Ltd | Real estate | 2015 |
| DT Lettings Ltd | Real estate | 2022 |
| DT Management & Maintenance Ltd | Real estate | 2025 |
| DTP Solutions Ltd | Administrative & support | 2014 |
| DTW Improvements Ltd | Construction | 2019 |
| DU FEU Designs Ltd | Professional & scientific | 2019 |
| DU FEU Ltd | Wholesale & retail | 2021 |
| DUA Azeen Ltd | Wholesale & retail | 2025 |
| Dualtone Communications Ltd | Information & communication | 2012 |
| Dubem Ventures Limited | Health & social care | 2022 |
| Duchesne Projects Limited | Administrative & support | 2009 |
| Duchesne Properties Limited | Real estate | 2019 |
| Dudalina Ltd | Other services | 2024 |
| Dudsbury Developments (Bournemouth) Limited | Professional & scientific | 2005 |
| Dudsbury Developments Limited | Wholesale & retail | 2000 |
| Dudsbury Homes (Denmead) Ltd | Construction | 2019 |
| Dudsbury Homes (Wessex) Ltd | Construction | 2018 |
| Duffield Productions Limited | Arts & recreation | 2017 |
| Duluxe Relocations Limited | Professional & scientific | 2026 |
| Dundas Court Lower Wharf Management Company Limited | Real estate | 2006 |
| Dundass Limited | Professional & scientific | 2012 |
| Dune Crest (Sandbanks) Limited | Households | 1974 |
| Dune Property & Staging Ltd | Administrative & support | 2025 |
| Dunholme Manor Residential Management Company Limited | Households | 1999 |
| Dunmore Construction (South West) Civils Ltd | Construction | 1992 |
| Dunmore Construction (South West) Holdings Limited | Financial services | 2021 |
| Dunmore Construction (South West) Limited | Construction | 1988 |
| Dunvegan Court Management Company Limited | Households | 2005 |
| Duona Ltd | Information & communication | 2017 |
| Dura Training Club Ltd | Wholesale & retail | 2025 |
| Duraheat MPS Ltd | Construction | 2012 |
| Durley Chine Court Residents Limited | Households | 1991 |
| Durley Dene Trading Limited | Hospitality | 2009 |
| DURLEY4 Ltd | Hospitality | 2024 |
| Durrano Ltd | Hospitality | 2023 |
| Durrant House Freehold Limited | Households | 2005 |
| Durrant Stone Ltd | Wholesale & retail | 2021 |
| Dust Away Domestics Ltd | Administrative & support | 2025 |
| DUST2SPARKLE South Ltd | Administrative & support | 2024 |
| Dusty Rose Productions Limited | Construction | 2018 |
| Dusza Limited | Professional & scientific | 2005 |
| Duver Enterprises Limited | Administrative & support | 2003 |
| DW Heating & Cooling Services Ltd | Construction | 2026 |
| DWB Projects Ltd | Construction | 2025 |
| DWC Trade Windows Limited | Construction | 2024 |
| Dwell Property Hub Ltd | Real estate | 2023 |
| DWF Dorset Wine Festival Ltd | Wholesale & retail | 2025 |
| Dwlj Enterprise Ltd | Transport & logistics | 2024 |
| DWP (Bournemouth) Limited | Construction | 2000 |
| Dwpg (Holdings) Limited | Construction | 2011 |
| DWS Windows & Doors Limited | Construction | 2022 |
| Dyacare UK Ltd | Wholesale & retail | 2019 |
| Dynamic Consultancy Limited | Professional & scientific | 2025 |
| Dynamic Heaters Limited | Construction | 2026 |
| Dynamic Motorworks Ltd | Wholesale & retail | 2026 |
| Dynamic Quad Properties Ltd | Real estate | 2024 |
| Dynamic Visions Limited | Professional & scientific | 2003 |
| Dynasty Ventures Limited | Hospitality | 2025 |
| Dynomite Motorcycles Ltd | Professional & scientific | 2022 |
| Dystopian Designs Ltd | Wholesale & retail | 2023 |