| Creative Property Invest Limited | Real estate | 2024 |
| Creative Property Social Housing Limited | Hospitality | 2024 |
| Crest Digital Ltd | Wholesale & retail | 2025 |
| Cross Construction (Dorset) Ltd | Construction | 2021 |
| Cross Investments (Dorset) Ltd | Real estate | 2018 |
| Crux Trading Ltd | Wholesale & retail | 2023 |
| Cryoshower Limited | Manufacturing | 2019 |
| Cryptorec Ltd | Administrative & support | 2016 |
| Cumulus Outdoor Events Limited | Arts & recreation | 2009 |
| Cumulus Outdoor Holdings Limited | Financial services | 2024 |
| Curiosity Enterprises Limited | Wholesale & retail | 1997 |
| CUT Above Flooring Ltd | Construction | 2003 |
| CWT Dorset Ltd | Professional & scientific | 2016 |
| D I Woodworx Limited | Construction | 2007 |
| D W G Smith Limited | Agriculture & fishing | 2002 |
| D&T Lifting Services Ltd | Construction | 2024 |
| D.C. Drives Ltd. | Manufacturing | 1997 |
| Daisy Swanage Limited | Wholesale & retail | 2021 |
| Danny RAE Holdings Ltd | Financial services | 2025 |
| Danny RAE Hybrid Ltd | Information & communication | 2025 |
| Davenham Court Management Limited | Households | 1988 |
| Davine Developments Limited | Extraterritorial | 2006 |
| Days Park Centre | Other services | 2019 |
| DB Brickwork & Building Ltd | Construction | 2021 |
| DCS Corporate Events and Education Ltd | Hospitality | 2022 |
| DD Works Ltd | Construction | 2015 |
| DE Moulham Management Ltd | Administrative & support | 2019 |
| Deam Property Limited | Real estate | 2024 |
| Dean Skivington Limited | Extraterritorial | 2024 |
| Deborah Holdings Ltd | Construction | 2015 |
| Deco Management Limited | Households | 2003 |
| Delancey Business Management Limited | Professional & scientific | 1992 |
| Demar Designs Limited | Construction | 2002 |
| Design Collections Retail Limited | Wholesale & retail | 2009 |
| Devgrid Digital Limited | Information & communication | 2018 |
| Devgrid Ltd | Information & communication | 2014 |
| Devon & Dorset Contractors Ltd | Construction | 2015 |
| DH Oxfordshire Limited | Administrative & support | 2017 |
| Differentiate Consultants Ltd | Professional & scientific | 2013 |
| Digby and Davis Ltd | Wholesale & retail | 2010 |
| Dino's (Swanage) Limited | Hospitality | 2003 |
| Disability Matters Limited | Administrative & support | 2020 |
| Divers Down Limited | Arts & recreation | 2008 |
| Diverse City | Education | 2006 |
| DMM Property Rentals Limited | Real estate | 2025 |
| Dolphin Court Residents Association (Swanage) Limited | Households | 1983 |
| Dorset Camping Ltd | Hospitality | 2018 |
| Dorset Gliding Club Limited | Arts & recreation | 1990 |
| Dorset Heat Ltd | Construction | 2013 |
| Dorset Made Limited | Manufacturing | 2018 |
| Dorset Property Management & Maintenance Limited | Real estate | 2018 |
| Dorset Waterpark Limited | Arts & recreation | 2015 |
| Downshay Tourers & Tents Limited | Hospitality | 2007 |
| Dppd Limited | Manufacturing | 2004 |
| Dptc Development Ltd | Manufacturing | 2010 |
| DR Jrms Medical Services Ltd | Health & social care | 2017 |
| Dromsollen Realisations LLP | | 2005 |
| DS One Builders and Developers Limited | Construction | 2011 |
| DSP2P Ltd | Financial services | 2011 |
| Duffy & Keats Ltd | Real estate | 2023 |
| Dune Beauty Ltd | Other services | 2019 |
| Durlston Cliff Flats Limited | Households | 1980 |
| Durlston Joinery Ltd | Manufacturing | 2020 |
| Durlston Management Limited | Households | 1995 |
| Durnford Garages Ltd | Real estate | 2021 |
| Eady Consultancy Services Limited | Professional & scientific | 2025 |
| Education Swanage Limited | Education | 2011 |
| Effective Promotions Ltd | Professional & scientific | 2016 |
| Egan Customs Ltd | Wholesale & retail | 2026 |
| Eight Park Limited | Households | 2003 |
| Elf's Property Maintenance Ltd | Construction | 2014 |
| Elite Interior Products UK Limited | Wholesale & retail | 2015 |
| ELM House Wareham Freehold Company Limited | Extraterritorial | 2017 |
| ELM House Wareham RTM Company Limited | Households | 2011 |
| Emta Consulting Ltd | Professional & scientific | 2023 |
| Endeavex Limited | Information & communication | 2007 |
| Endeavour Dominion Limited | Hospitality | 2007 |
| Envirx London Ltd | Financial services | 2025 |
| Envision Sustainability Limited | Professional & scientific | 2012 |
| Epic IP Limited | Professional & scientific | 2020 |
| Equataine Ltd | Real estate | 2020 |
| Eric O'Hara Limited | Wholesale & retail | 2015 |
| Eserve Ltd | Professional & scientific | 2013 |
| Esmond Management Co. Limited | Households | 1986 |
| Ethical Wares Ltd | Manufacturing | 2007 |
| Event Horizon Engineering Limited | Manufacturing | 2015 |
| Everything Hospitality UK Ltd | Hospitality | 2026 |
| Exactus Hotels Ltd | Hospitality | 2026 |
| Expanding Box Consultants Limited | Information & communication | 2018 |
| Explorers Childcare Group Ltd | Education | 2014 |
| F J Aviation Limited | Professional & scientific | 2008 |
| Fairfields Studland Management Co Limited | Households | 2017 |
| Fairways Consulting Structural Engineers Ltd | Construction | 2019 |
| Fairwinds Flats (Swanage) Limited | Real estate | 1988 |
| Famous (10) Limited | Other services | 2010 |
| Farmer Holdings Ltd | Real estate | 2019 |
| Ferryboat Flats Limited | Households | 2000 |
| Finanta Limited | Financial services | 2016 |
| Fine Art Inkorporated Limited | Professional & scientific | 2017 |
| Fire Investigation Specialists Ltd. | Professional & scientific | 2010 |