| Capital Homewares Europe Ltd | Wholesale & retail | 2022 |
| Care for Your Smile Ltd | Health & social care | 2015 |
| Care PP1 Ltd | Health & social care | 2020 |
| Carraway Consulting Limited | Information & communication | 2022 |
| Caviscan Ltd | Manufacturing | 2017 |
| CC2SQUARED Ltd | Information & communication | 2024 |
| CCM Shop Ltd | Wholesale & retail | 2013 |
| CGP Build (Dorset) Ltd | Construction | 2019 |
| CGP Mechanical and Electrical Ltd | Construction | 2026 |
| Channel Theatre Productions Limited | Arts & recreation | 2009 |
| Chat-Com Ltd. | Information & communication | 2016 |
| Chestnut Close (Marnhull) Management Limited | Households | 2021 |
| Chris Pankhurst (Carpenters) Limited | Construction | 2002 |
| Churchfoot Residents Management Limited | Households | 1998 |
| Cinelogic Digital UK Limited | Information & communication | 2019 |
| CJK & RA Yates LLP | | 2012 |
| Clapham Carpentry & Joinery Limited | Construction | 2002 |
| Clearstream Developments Ltd | Construction | 2025 |
| Clover by Molly Ltd | Wholesale & retail | 2026 |
| Coach House Design & Consultancy Limited | Professional & scientific | 1999 |
| Coldharbour Farm Limited | Agriculture & fishing | 1997 |
| Communications (Southern) Limited | Information & communication | 1995 |
| Complete Boiler Care Ltd | Manufacturing | 2022 |
| Complete GAS & Plumbing Services Ltd | Construction | 2015 |
| Complete Hoof Services Ltd | Professional & scientific | 2025 |
| Compli RX Ltd | Professional & scientific | 2024 |
| Concordia Construction Group Limited | Financial services | 2026 |
| Conifer Cottage Ltd | Wholesale & retail | 2025 |
| Conker Marketing Limited | Professional & scientific | 2014 |
| Connectminds Consulting Limited | Information & communication | 2015 |
| Consbest Nc&Njc Ltd | Construction | 2025 |
| Conservatories 4 U (Dorset) Limited | Construction | 2003 |
| Consult@ Limited | Administrative & support | 2005 |
| Cook's Garage Limited | Wholesale & retail | 2016 |
| Corner House Research | Professional & scientific | 1999 |
| Cosmic Nudge Limited | Wholesale & retail | 2026 |
| County Ebikes Ltd | Wholesale & retail | 2025 |
| Covalency Consulting Ltd | Administrative & support | 2022 |
| Crackmoor Farm Limited | Agriculture & fishing | 2005 |
| Cranborne Stone Limited | Manufacturing | 2009 |
| Creativy Limited | Wholesale & retail | 2024 |
| CREWSOLUTIONS83 Ltd | Real estate | 2026 |
| Croft View Hazelbury Bryan (Management) Limited | Households | 2002 |
| CT Building (Dorset) Ltd | Construction | 2024 |
| D P Tennis Coaching Limited | Arts & recreation | 2026 |
| D R R Stranger & Sons Limited | Agriculture & fishing | 2009 |
| Daisy Delbridge Ltd | Wholesale & retail | 2022 |
| Daisy's Lettings & Developments Ltd | Real estate | 2025 |
| Dark Lane Interiors Limited | Wholesale & retail | 2024 |
| Dash Heritage Building Ltd | Construction | 2025 |
| Data Management & Warehousing Ltd. | Information & communication | 1998 |
| Dave Gordge Decorating Limited | Construction | 2017 |
| Davenport & Sons Limited | Real estate | 1918 |
| David Atkins Ltd. | Arts & recreation | 2017 |
| Daybrook Consulting Limited | Information & communication | 1997 |
| DC Garden Machinery Ltd | Other services | 2021 |
| Deane Knight Plumbing and Heating Limited | Construction | 2010 |
| Delco Builders Limited | Construction | 2025 |
| Delevision Ltd | Information & communication | 2021 |
| Dellows Emporium Ltd | Wholesale & retail | 2024 |
| Deus EX Machina Ltd | Administrative & support | 2007 |
| Dick's Contracting Limited | Agriculture & fishing | 2012 |
| Digbee Limited | Information & communication | 2016 |
| Digital Archways Ltd | Information & communication | 2026 |
| Digital Zenith Ltd | Information & communication | 2023 |
| Discovery Battlefield Tours Ltd | Extraterritorial | 2015 |
| Divine Dental Ltd | Health & social care | 2024 |
| DLB Electrical Ltd | Construction | 2024 |
| Dominus Builders Ltd | Construction | 2020 |
| Dorchester Meat Company Limited | Agriculture & fishing | 1971 |
| Dorset Automotive Ltd | Wholesale & retail | 2026 |
| Dorset Countryside Services Ltd | Water & waste | 2025 |
| Dorset Fencing Supplies Ltd | Construction | 2012 |
| Dorset Foodies Limited | Hospitality | 2013 |
| Dorset Garage Doors Limited | Professional & scientific | 2004 |
| Dorset Lavender Farm Project Limited | Agriculture & fishing | 2010 |
| Dorset Stained Glass Limited | Arts & recreation | 2019 |
| Dorset Stone Company Limited | Mining & quarrying | 2003 |
| Dorset Textiles Limited | Wholesale & retail | 2018 |
| Doula Doula Ltd | Health & social care | 2025 |
| Dovizia Capital Limited | Financial services | 2026 |
| Dragon Stanley Limited | Information & communication | 2019 |
| Drummer and Duff Ltd. | Professional & scientific | 2018 |
| DW Defence Ltd | Professional & scientific | 2018 |
| EDT Technologies Ltd | Information & communication | 2022 |
| EJB Pubs Ltd | Hospitality | 2025 |
| Electrical Contracting Services (Southern) Ltd | Construction | 2018 |
| Ellen Place Management Limited | Households | 2019 |
| Else Butchers Limited | Wholesale & retail | 2003 |
| Empower Training & Consultancy Ltd | Education | 2024 |
| Empty Rose Ltd | Education | 2023 |
| Enhance TKS Limited | Other services | 2022 |
| ESS (Dorset) Limited | Other services | 2019 |
| Eurodec Promenade Tiles Limited | Manufacturing | 2009 |
| Evans & Co Accountancy Limited | Real estate | 2002 |
| Exclusive Home Furniture Limited | Construction | 2011 |
| FCE (GP 2) Limited | Real estate | 2024 |
| FCE (GP) Limited | Real estate | 2024 |
| FDP Properties Limited | Extraterritorial | 2002 |
| Fenwick & Sons Building Group Ltd | Construction | 2018 |