| Dome Christchurch Limited | Hospitality | 2025 |
| Domiro Consulting Limited | Wholesale & retail | 2010 |
| Donawa Lifescience Ltd | Professional & scientific | 2020 |
| Doogal Does IT Limited | Construction | 2019 |
| Dormant Company 11719410 Ltd | Information & communication | 2018 |
| Dormech Mechanical Engineering Services Ltd | Construction | 2022 |
| Dorset Airport Transfers Ltd | Transport & logistics | 2022 |
| Dorset Airport Transfers MA Ltd | Transport & logistics | 2026 |
| Dorset Cleaning Co Limited | Administrative & support | 2020 |
| Dorset Coast Wills Limited | Wholesale & retail | 2020 |
| Dorset Construction Ltd | Construction | 2026 |
| Dorset Court Maintenance Limited | Households | 1971 |
| Dorset Exterior Cleaning Ltd | Administrative & support | 2020 |
| Dorset Finance Change Ltd | Professional & scientific | 2022 |
| Dorset Hair Supplies Ltd | Wholesale & retail | 2022 |
| Dorset Mobile Car Valeting Ltd | Administrative & support | 2024 |
| Dorset Psychological Services Ltd | Health & social care | 2026 |
| Dorset Transport Limited | Transport & logistics | 2022 |
| Dorset Vintage and Classic Auctions Limited | Wholesale & retail | 2005 |
| Dorsinai Properties Ltd | Real estate | 2020 |
| Doulos EOT Trustee Limited | Professional & scientific | 2022 |
| DR Duane O'Reilly Limited | Health & social care | 2017 |
| Drainwave Solutions Ltd | Water & waste | 2025 |
| Draken Leasing Limited | Administrative & support | 1994 |
| Draken UK Bidco Limited | Financial services | 2020 |
| Dream Design Interiors Limited | Wholesale & retail | 2003 |
| DRH Surveying Services Limited | Construction | 2023 |
| Drilling Systems Group Limited | Manufacturing | 2015 |
| Drivesure Limited | Wholesale & retail | 2012 |
| Drogo Consulting Limited | Information & communication | 2015 |
| Drop the Anchor Brewery Ltd | Manufacturing | 2016 |
| DS Elite Ltd | Construction | 2023 |
| DS UK Midco 1 Limited | Administrative & support | 2015 |
| DS UK Midco 2 Limited | Administrative & support | 2015 |
| DS UK Topco Limited | Administrative & support | 2015 |
| DUA Architecture LLP | | 2002 |
| Duho Ltd | Professional & scientific | 2007 |
| Duke Interiors Limited | Construction | 2017 |
| Duncanjbarnett Ltd | Professional & scientific | 2022 |
| Dunlop Investments Limited | Real estate | 2020 |
| Duplock House RTM Company Limited | Households | 2020 |
| Dustie Houchin Limited | Professional & scientific | 2023 |
| DW Marine Projects Ltd | Manufacturing | 2024 |
| DWF Film Limited | Information & communication | 2025 |
| DY 4 Systems U.K. Ltd | Wholesale & retail | 1995 |
| Dynamic Bricklaying Ltd | Construction | 2022 |
| Dynamic Carpentry & Build Ltd | Construction | 2019 |
| Dynamic Sourcing Solutions Limited | Professional & scientific | 2016 |
| Dysoft Limited | Information & communication | 2016 |
| E-Mango.Com Limited | Information & communication | 1999 |
| E-Quick Freight Limited | Transport & logistics | 2025 |
| Earth,Turf,Timber Ltd | Construction | 2024 |
| East 2 West Construction Limited | Construction | 2010 |
| East Christchurch Sports and Social Club Ltd | Arts & recreation | 2001 |
| East Close Farms Limited | Agriculture & fishing | 2020 |
| East Close Hotel Limited | Hospitality | 2015 |
| East Dorset Dockers RFC Ltd | Arts & recreation | 2013 |
| Eaton Garden Services Ltd | Administrative & support | 2023 |
| EB97CLD Consulting Limited | Administrative & support | 2011 |
| EBB & Flow for Life Ltd | Professional & scientific | 2026 |
| EBB and Flow Wealth Ltd | Financial services | 2015 |
| Eblight Ltd | Professional & scientific | 2018 |
| EBS Communication Solutions Limited | Information & communication | 2015 |
| EC Hampshire Ltd | Other services | 2015 |
| Ecala Life Limited | Information & communication | 2017 |
| Echoblue Ltd | Professional & scientific | 2012 |
| Eclipse ED. Psychology Consultancy Ltd. | Health & social care | 2023 |
| Eco Composting Limited | Professional & scientific | 1993 |
| Eco Damp Solutions Limited | Households | 2023 |
| Eco LOG Burners South Ltd | Construction | 2024 |
| Eco Parley Biomass Limited | Administrative & support | 2014 |
| Eco Sustainable Solutions Limited | Energy | 1995 |
| Eco Towel Company Ltd | Wholesale & retail | 2006 |
| Eco-Flow Solutions Limited | Wholesale & retail | 2020 |
| Ecohome Renewables Ltd | Construction | 2022 |
| Ecowatts Ltd | Construction | 2022 |
| Ed&Ms Accounts Ltd | Construction | 2025 |
| Edak Limited | Education | 2015 |
| Edda Property Group Ltd | Real estate | 2024 |
| Eden Home & Boutique Limited | Wholesale & retail | 2011 |
| Educamps Ltd | Education | 2018 |
| Educating Footballers Ltd | Education | 2024 |
| Edutracker Limited | Education | 2020 |
| Edwards Court Management Limited | Households | 2019 |
| Edwards Electrical South Coast Limited | Construction | 2018 |
| Effortless Gym Ltd | Arts & recreation | 2025 |
| EHL Properties Limited | Real estate | 2025 |
| EJE Solutions Ltd | Wholesale & retail | 2018 |
| Ejww Ltd | Financial services | 2026 |
| Ekinci Store Ltd | Wholesale & retail | 2019 |
| EKO IT Limited | Information & communication | 2011 |
| Elcock Associates Ltd | Professional & scientific | 2007 |
| Elcock Holdings Ltd | Financial services | 2020 |
| Elean Energy Limited | Energy | 2018 |
| Elean Laser Energy Limited | Energy | 2018 |
| Electric Blue Gallery Limited | Wholesale & retail | 2008 |
| Electric Cargo Bikes Limited | Extraterritorial | 2017 |
| Electric Cars Only Ltd | Wholesale & retail | 2024 |
| Electrical Exchange Ltd | Construction | 2023 |
| Electrical Tech Services Ltd | Construction | 2017 |