| Dorford Centre Limited | Real estate | 2009 |
| Dorset & Devon Developments Limited | Construction | 2013 |
| Dorset & Somerset Estates Limited | Agriculture & fishing | 1964 |
| Dorset & South Wiltshire Area Quaker Meeting | Education | 2012 |
| Dorset Abilities Group Ltd | Hospitality | 2015 |
| Dorset and Somerset Flight Training LLP | | 2026 |
| Dorset Anodising Products Limited | Manufacturing | 2025 |
| Dorset Arts Development Service CIC | Arts & recreation | 2015 |
| Dorset Association of Parish & Town Councils Limited | Other services | 2025 |
| Dorset Auto Body Limited | Wholesale & retail | 2018 |
| Dorset Auto Repairs Ltd | Wholesale & retail | 2026 |
| Dorset Blinds Ltd | Wholesale & retail | 2017 |
| Dorset Building Solutions Ltd | Construction | 2020 |
| Dorset Caravans Ltd | Wholesale & retail | 2025 |
| Dorset Care Holdings Limited | Financial services | 2023 |
| Dorset Cattery Limited | Agriculture & fishing | 2024 |
| Dorset Commercial Ltd | Real estate | 2026 |
| Dorset Community Action | Other services | 1997 |
| Dorset Cottages Ltd | Real estate | 2017 |
| Dorset County Dance Festival CIC | Administrative & support | 2021 |
| Dorset Curry Ltd | Hospitality | 2025 |
| Dorset Dairy Services Limited | Manufacturing | 2010 |
| Dorset Dent Repair Limited | Manufacturing | 2000 |
| Dorset Digital Agency Ltd | Information & communication | 2025 |
| Dorset Drama Academy Ltd | Arts & recreation | 2022 |
| Dorset Drivers Ltd | Transport & logistics | 2021 |
| Dorset Ecology Limited | Extraterritorial | 2012 |
| Dorset Equine Veterinary Services Limited | Professional & scientific | 2013 |
| Dorset Farmers' Markets Ltd | Administrative & support | 2004 |
| Dorset FD Limited | Professional & scientific | 2010 |
| Dorset Flower Press Company Ltd | Manufacturing | 2021 |
| Dorset Food & Drink C.I.C. | Administrative & support | 2017 |
| Dorset Forest School Training Ltd | Education | 2023 |
| Dorset Groundscaping Limited | Construction | 2019 |
| Dorset H&M Medical Ltd | Health & social care | 2026 |
| Dorset Health Trust Limited(The) | Health & social care | 1977 |
| Dorset Home Care Limited | Health & social care | 2019 |
| Dorset Horn and Poll Dorset Sheep Breeders' Association | Agriculture & fishing | 1891 |
| Dorset Innovation Park Limited | Real estate | 2025 |
| Dorset Inns Limited | Hospitality | 2001 |
| Dorset Knapp Ltd | Agriculture & fishing | 2025 |
| Dorset Local Enterprise Partnership C.I.C. | Administrative & support | 2016 |
| Dorset Market Cafe 2024 Ltd | Hospitality | 2024 |
| Dorset Marketing Ltd | Extraterritorial | 2002 |
| Dorset Museum Trading Company Limited | Wholesale & retail | 2020 |
| Dorset Opera | Education | 2004 |
| Dorset Paragliding Ltd | Wholesale & retail | 2002 |
| Dorset Pastry Limited | Wholesale & retail | 2001 |
| Dorset Performance Exhausts & Tuning Ltd | Wholesale & retail | 2022 |
| Dorset Planning Consultants & Associates Limited | Information & communication | 2016 |
| Dorset Pottery Limited | Manufacturing | 2021 |
| Dorset Press Limited(The) | Other services | 1982 |
| Dorset Private Surgeon Ltd | Health & social care | 2016 |
| Dorset Property Search Ltd | Other services | 2020 |
| Dorset Racing Limited | Wholesale & retail | 2019 |
| Dorset Renewables Ltd | Construction | 2023 |
| Dorset Residential Limited | Real estate | 2021 |
| Dorset Scaffolding Limited | Construction | 1996 |
| Dorset Seamless Surfaces Ltd | Manufacturing | 2019 |
| Dorset Springs Limited | Agriculture & fishing | 2021 |
| Dorset Teak Ltd | Wholesale & retail | 2025 |
| Dorset Tractors Ltd | Manufacturing | 2020 |
| Dorset Utilities & Groundworks Ltd | Construction | 2019 |
| Dorset Vcsa CIC | Other services | 2024 |
| Dorset Water Centre Ltd | Extraterritorial | 2021 |
| Dorset Wellbeing Practice Limited | Health & social care | 2024 |
| Dorset Women CIC | Professional & scientific | 2023 |
| Dorsethc Ltd | Professional & scientific | 2024 |
| Dorweb Ltd | Information & communication | 2018 |
| Dorwest Herbs Limited | Other services | 1985 |
| Dotb Ltd | Wholesale & retail | 2024 |
| Dotdot Design Limited | Arts & recreation | 2011 |
| Double-Barrows Limited | Administrative & support | 2018 |
| Down 2 Earth SW Ltd | Administrative & support | 2014 |
| Down to Earth (Dorchester) Ltd | Wholesale & retail | 2021 |
| DPW Electrical Ltd | Construction | 2018 |
| DR Milli Consulting Ltd | Public administration | 2023 |
| DR N Ciociola Limited | Professional & scientific | 2023 |
| Dragons Nest Limited | Real estate | 2024 |
| Draughtsman Ltd | Information & communication | 1986 |
| Draughtsman Properties Ltd | Construction | 2015 |
| DRC Property (Bridport) Ltd | Real estate | 2014 |
| Dream Adventures Ltd | Arts & recreation | 2017 |
| Driftwood Sailing Limited | Professional & scientific | 2004 |
| Driver Surveyors Ltd | Professional & scientific | 2014 |
| Droogan Associates Limited | Professional & scientific | 2023 |
| Dryline + Consultants Limited | Construction | 2011 |
| Ds+A Ltd. | Administrative & support | 1994 |
| Ductus Subsidium Limited | Professional & scientific | 2025 |
| Duke's 1823 LLP | | 2014 |
| Dumaw Projects Ltd | Financial services | 2026 |
| Dunmurry Limited | Hospitality | 1995 |
| Duntish Mill Farm Ltd | Hospitality | 2025 |
| Durnanova Ltd | Administrative & support | 2023 |
| Dutch Living Limited | Wholesale & retail | 2021 |
| DV Market Limited | Wholesale & retail | 2026 |
| Dyer Acoustic Ceilings LLP | | 2003 |
| Dynamic Housing Limited | Agriculture & fishing | 2006 |
| E & S Catering Enterprises Ltd | Hospitality | 2020 |
| E a M Lettings Ltd | Real estate | 2023 |