| Dorset Mind | Health & social care | 2005 |
| Dorset Mortgage Group Ltd | Financial services | 2021 |
| Dorset Noodle Company Ltd | Hospitality | 2023 |
| Dorset Orthodontics Ltd | Health & social care | 2019 |
| Dorset Oysters Limited | Wholesale & retail | 2008 |
| Dorset Pianos Limited | Wholesale & retail | 2020 |
| Dorset Power Boat Services Limited | Transport & logistics | 2024 |
| Dorset Private Physiotherapy Ltd | Health & social care | 2019 |
| Dorset Pro Tiling Limited | Construction | 2022 |
| Dorset Properties Limited | Construction | 1995 |
| Dorset Property Finance Ltd | Financial services | 2023 |
| Dorset Property Solutions Limited | Construction | 2016 |
| Dorset Race Equality Council | Professional & scientific | 2004 |
| Dorset Rentals Limited | Households | 2025 |
| Dorset Roofing Services Ltd | Construction | 2009 |
| Dorset Safe Storage Ltd | Wholesale & retail | 2024 |
| Dorset Scaffold Ltd | Construction | 2025 |
| Dorset Scuba Ltd | Arts & recreation | 2020 |
| Dorset Security Limited | Wholesale & retail | 2012 |
| Dorset Security Services Ltd | Financial services | 2024 |
| Dorset Service Crew Ltd | Construction | 2025 |
| Dorset Shine Ltd | Manufacturing | 2021 |
| Dorset Shutters Ltd | Construction | 2006 |
| Dorset SM Properties Ltd | Real estate | 2022 |
| Dorset Spray Rendering Limited | Construction | 2021 |
| Dorset Tourism Association Community Interest Company | Information & communication | 2015 |
| Dorset Turf Ltd. | Administrative & support | 2002 |
| Dorset Vaults Limited | Wholesale & retail | 2000 |
| Dorset Warehouse Services Limited | Real estate | 2004 |
| Dorset's Ultimate Canoe Kayaking Squad Community Interest Company | Arts & recreation | 2011 |
| Dorsetbiker Ltd | Wholesale & retail | 2003 |
| Doruco Property and Investment Limited | Real estate | 2023 |
| Dorwin Court Right to Manage Company Limited | Households | 2009 |
| Doryan Ltd | Health & social care | 2018 |
| Dosed by Doctors Limited | Wholesale & retail | 2024 |
| Dosser Ltd | Wholesale & retail | 2025 |
| Dost Taxi Ltd | Transport & logistics | 2025 |
| DOT and Blush Limited | Wholesale & retail | 2021 |
| Dots Disability Community Interest Company | Health & social care | 2007 |
| Double Glazed Ltd | Construction | 2011 |
| Double Jump Films Ltd | Information & communication | 2018 |
| Double Strength Academy Ltd | Professional & scientific | 2025 |
| Doudou Takeaway Ltd | Hospitality | 2018 |
| Dough Box Kitchen Ltd | Hospitality | 2026 |
| Dough Joe's Limited | Hospitality | 2026 |
| Doughlicious Foods Ltd | Hospitality | 2023 |
| Dover Inns Limited | Hospitality | 2009 |
| Doveshill Construction Ltd | Construction | 2016 |
| Doveshill Developments Ltd | Construction | 2022 |
| Doveshill Mineral Resources Ltd | Mining & quarrying | 2021 |
| Doveshill Resin Bound Drives Ltd | Construction | 2018 |
| Dovetail Designs Ltd | Manufacturing | 2016 |
| Down to Earth Landscapes and Horticulture Ltd | Administrative & support | 2026 |
| Downton Investments Ltd | Construction | 2020 |
| Downton Service Station Ltd | Wholesale & retail | 2014 |
| DP Measurement Limited | Manufacturing | 1998 |
| Dpnc Solutions Ltd | Construction | 2023 |
| DPO Office Limited | Professional & scientific | 2014 |
| DPR Marketing Ltd | Professional & scientific | 2019 |
| Dqms Comms Limited | Professional & scientific | 2018 |
| DR a Soyinka Limited | Health & social care | 2024 |
| DR Chocolate Ltd. | Manufacturing | 2023 |
| DR Lopes Aesthetics Ltd | Health & social care | 2025 |
| DR Property Ltd | Real estate | 2021 |
| DR Property Solution Limited | Construction | 2017 |
| DR Tanna Dermatology Consultant Ltd | Health & social care | 2024 |
| DR Victoria Consulting Limited | Health & social care | 2023 |
| DR.MOBILE126 Limited | Wholesale & retail | 2024 |
| Dragobully Ltd | Wholesale & retail | 2022 |
| Dragon Family (Bournemouth) Limited | Hospitality | 2022 |
| Dragon Palace Cuisine Limited | Hospitality | 1997 |
| Dragon Spells Copy Ltd | Professional & scientific | 2022 |
| Dragonfly Living Limited | Professional & scientific | 2017 |
| Dragons Whisk Limited | Wholesale & retail | 2024 |
| Drain Checker UK Ltd | Professional & scientific | 2026 |
| Drain Clean Ltd | Water & waste | 2020 |
| Drain Direct Ltd | Water & waste | 2023 |
| Drain Protection UK Ltd | Other services | 2019 |
| Drain Response Ltd | Construction | 2024 |
| Drainage Doctor Ltd | Water & waste | 2025 |
| Drainage Local Experts Ltd | Construction | 2026 |
| Drainage Resolutions Limited | Water & waste | 2026 |
| Drainage South Ltd | Water & waste | 2026 |
| Drainfix Ltd | Professional & scientific | 2010 |
| Drainrite (Dorset) Limited | Water & waste | 2010 |
| Drainsco Ltd | Construction | 2025 |
| Drake's Estates Limited | Real estate | 2021 |
| Drakes Delights Ltd | Wholesale & retail | 2025 |
| Drapes & Blinds (Bournemouth) Limited | Manufacturing | 2023 |
| Draughtfast Limited | Administrative & support | 2025 |
| Drct Property Management Limited | Hospitality | 2025 |
| DRE Dorset Ltd | Construction | 2015 |
| Dream Improvements Ltd | Construction | 2025 |
| Dream Team Plastering Contractors Ltd | Construction | 2018 |
| DREAMCARETEAM2020 Ltd | Health & social care | 2020 |
| Dreamframe Ltd | Information & communication | 2026 |
| Dreamhaven Limited | Real estate | 1994 |
| Dreaming Dodo Limited | Real estate | 2022 |
| Dreamland Bournemouth Ltd | Construction | 2016 |
| Dreamlands Film & Media Ltd | Professional & scientific | 2017 |