| Dolphin Glass Ltd | Construction | 2025 |
| Dolphin Terrace Freehold Ltd | Real estate | 2023 |
| Domar Ltd | Other services | 2019 |
| Domestec Ltd | Other services | 2020 |
| Domestic Angels (UK) Limited | Information & communication | 2003 |
| Domestic Angels Christchurch Limited | Administrative & support | 2021 |
| Domestic Angels Franchising Limited | Administrative & support | 2016 |
| Domestic Appliance Guard Ltd | Other services | 2017 |
| Domestic Warranty Shop Limited | Other services | 2019 |
| Domestic Works Record Ltd | Information & communication | 2026 |
| Domestichomecare Ltd | Manufacturing | 2021 |
| Domesticsurveyingservices Limited | Construction | 2025 |
| Domi Design Ltd | Professional & scientific | 2021 |
| Dominey Healthcare Limited | Professional & scientific | 2012 |
| Dominey-Foy Consulting Limited | Professional & scientific | 2025 |
| Domino Transfer Ltd | Transport & logistics | 2025 |
| Domonic Teversham Building & Groundwork Limited | Construction | 2003 |
| Domus Eco Ltd | Construction | 2015 |
| Domus Felix Ltd | Real estate | 2022 |
| Domus Vitae Limited | Financial services | 2025 |
| DONALD4DON Limited | Health & social care | 2024 |
| Doner Kebab Bournemouth Ltd | Hospitality | 2023 |
| Donhead Consulting Ltd | Financial services | 2021 |
| Donici Limited | Wholesale & retail | 2020 |
| Doodson Consulting Ltd | Information & communication | 2022 |
| Doole's Limited | Hospitality | 2018 |
| Door & Gatecraft Ltd | Manufacturing | 2014 |
| Door Controls Direct Ltd | Wholesale & retail | 2003 |
| Door Controls Group Limited | Professional & scientific | 2023 |
| Door Supervisor Training Organisation Limited | Education | 1997 |
| DOOR54 Ltd | Information & communication | 2020 |
| Doorfobs Ltd | Wholesale & retail | 2024 |
| Doorid Ltd | Information & communication | 2026 |
| Doorway Solutions Ltd | Construction | 2025 |
| Dorchester Mansions (1997) Limited | Households | 1998 |
| Dorchester Place (Bournemouth) Ltd | Households | 2000 |
| Dorchester Place (Freehold) Limited | Households | 2002 |
| Doreta Limited | Health & social care | 2018 |
| Dorkins Limited | Real estate | 2026 |
| Dorsa 75 Ltd | Wholesale & retail | 2026 |
| Dorset and West Country Consultancy Services Limited | Hospitality | 1988 |
| Dorset ATS Ltd | Wholesale & retail | 2023 |
| Dorset Bakery Ltd | Hospitality | 2019 |
| Dorset Bikes Limited | Education | 2021 |
| Dorset BIN Cleaning Limited | Administrative & support | 2023 |
| Dorset Botanicals Ltd | Wholesale & retail | 2015 |
| Dorset Bridal Outlet Limited | Wholesale & retail | 2022 |
| Dorset Build Ltd | Construction | 2023 |
| Dorset Builders Ltd | Construction | 2019 |
| Dorset Building Consultancy Ltd | Professional & scientific | 2022 |
| Dorset Business Angel | Administrative & support | 2012 |
| Dorset Business Angels Network Limited | Administrative & support | 2019 |
| Dorset C&L Ltd | Manufacturing | 2023 |
| Dorset Car Care Ltd | Wholesale & retail | 2025 |
| Dorset Carriage Masters Ltd | Other services | 2020 |
| Dorset Chauffeurs Limited | Transport & logistics | 2023 |
| Dorset Cider Farm Limited | Extraterritorial | 2016 |
| Dorset Civil Engineering Ltd | Construction | 2018 |
| Dorset Civils Ltd | Construction | 2020 |
| Dorset Coastal Escapes Limited | Hospitality | 2023 |
| Dorset Commerce Ltd | Wholesale & retail | 2022 |
| Dorset Commercial Cleaning Limited | Administrative & support | 2017 |
| Dorset Conservatory Blinds Ltd | Construction | 2000 |
| Dorset Containers Ltd | Other services | 2025 |
| Dorset Contract Flooring Limited | Wholesale & retail | 2006 |
| Dorset County Maintenance Ltd | Construction | 2011 |
| Dorset Custom Campers Limited | Wholesale & retail | 2023 |
| Dorset Damp Solutions Ltd | Construction | 2016 |
| Dorset Dental Centre Limited | Health & social care | 2016 |
| Dorset Diving Training Services Limited | Extraterritorial | 2015 |
| Dorset Dog Training Limited | Education | 2021 |
| Dorset Driver Training Ltd | Education | 2018 |
| Dorset Elite Taxis Ltd | Transport & logistics | 2025 |
| Dorset Event Hire Ltd | Administrative & support | 2021 |
| Dorset Expert Survey Limited | Professional & scientific | 2019 |
| Dorset Finance Partners Ltd | Professional & scientific | 2026 |
| Dorset Flooring Limited | Construction | 2023 |
| Dorset Food Festivals Ltd | Administrative & support | 2021 |
| Dorset Freehold Limited | Real estate | 2021 |
| Dorset Futsal Club Ltd | Arts & recreation | 2025 |
| Dorset GAS Limited | Construction | 2017 |
| Dorset Gastroenterology Limited | Health & social care | 2019 |
| Dorset Gleam Ltd | Professional & scientific | 2015 |
| Dorset Goes Wild CIC | Professional & scientific | 2025 |
| Dorset Golf Limited | Arts & recreation | 2026 |
| Dorset Gutter VAC Ltd | Construction | 2026 |
| Dorset Guttering Ltd | Construction | 2026 |
| Dorset Heart Clinic LLP | | 2016 |
| Dorset Heart Doctor Limited | Health & social care | 2020 |
| Dorset Heart Rhythm Limited | Health & social care | 2019 |
| Dorset Home Lettings Limited | Real estate | 2025 |
| Dorset House Freehold Limited | Households | 2008 |
| Dorset HR Limited | Administrative & support | 2014 |
| Dorset Jewellers Limited | Wholesale & retail | 2024 |
| Dorset Lake Ltd | Real estate | 2023 |
| Dorset Land Surveying Limited | Professional & scientific | 2003 |
| Dorset Maintenance and Cleaning Services Ltd | Administrative & support | 2023 |
| Dorset Medical Aesthetics Training Ltd | Health & social care | 2023 |
| Dorset Medical Cosmetics Limited | Health & social care | 2012 |
| Dorset Metal Recycling Ltd | Wholesale & retail | 2021 |