| Clarke Fisher Limited | Construction | 1972 |
| CLB Property Management Limited | Real estate | 2018 |
| CMV Joinery Limited | Construction | 2022 |
| Coastal PR Ltd | Professional & scientific | 2022 |
| Cogent Consult Ltd | Professional & scientific | 2020 |
| Cole's Creations Ltd | Construction | 2023 |
| Collide Joinery Recruitment Ltd | Administrative & support | 2025 |
| Community of Healing T/A a and S Properties Ltd | Other services | 2015 |
| Compton Close Management Company Limited | Households | 2001 |
| Contactless Donation Boxes Limited | Manufacturing | 2023 |
| Copeland Restorations Ltd | Construction | 2024 |
| Core Success Ltd | Financial services | 2022 |
| Corylus Environmental Ltd | Professional & scientific | 2016 |
| Cottingham Grange (Verwood) Management Company Limited | Households | 2000 |
| Country and Capital Developments Limited | Real estate | 1969 |
| Country Lane Limited | Arts & recreation | 2003 |
| Countryman’S Contracting Limited | Construction | 2026 |
| Cousins Contracting Ltd | Professional & scientific | 2023 |
| CPA (Bournemouth) Limited | Professional & scientific | 2016 |
| Cranborne Roofing Ltd | Construction | 2025 |
| Cranebrook Developments Limited | Construction | 2003 |
| Cranebrook Marketing Limited | Professional & scientific | 2005 |
| CRE8 Designs Ltd | Professional & scientific | 2019 |
| Create Safe Ltd | Professional & scientific | 2019 |
| Crescent Motorcycle Company Limited | Professional & scientific | 1997 |
| Critichem Ltd | Wholesale & retail | 2026 |
| Cronqvist Consulting Limited | Professional & scientific | 2020 |
| Cross Water Developments Limited | Construction | 2022 |
| Cusack-Ehs Limited | Professional & scientific | 2020 |
| Custom Creations (Holdings) Ltd | Financial services | 2026 |
| Custom Creations Limited | Manufacturing | 2014 |
| Customworqs Limited | Financial services | 2010 |
| CVL Solutions Limited | Wholesale & retail | 2024 |
| D J Sims Ltd | Financial services | 2022 |
| D L H Cars and Commercials Limited | Wholesale & retail | 2011 |
| D3 Electrical Contractors Ltd | Construction | 2024 |
| Daisy Dolly Limited | Wholesale & retail | 2024 |
| Danelico Ltd | Professional & scientific | 2025 |
| Daniel Champion Limited | Other services | 2012 |
| Datum Drainage Limited | Construction | 2008 |
| David Tolson & Co Limited | Professional & scientific | 2011 |
| Dayfold Presentation Limited | Professional & scientific | 2002 |
| DC Auto Mechanics Limited | Wholesale & retail | 2021 |
| DCD Lifestyle Planners Ltd | Administrative & support | 2022 |
| Deborah Clayton Ltd | Wholesale & retail | 2022 |
| Deburr Jewellery Limited | Wholesale & retail | 2012 |
| Denmark Victoria House Limited | Households | 1995 |
| Development 2000 Computing Limited | Information & communication | 1996 |
| Dewlands Way Management Company Limited | Real estate | 1999 |
| DG Developments (2018) Ltd | Construction | 2018 |
| Displays (UK) Limited | Manufacturing | 2014 |
| Dodo Coaching Ltd | Hospitality | 2024 |
| Dorset Accident Repair Centre Ltd | Wholesale & retail | 2021 |
| Dorset Car Body Ltd | Wholesale & retail | 2020 |
| Dorset Chimneys Ltd | Construction | 2024 |
| Dorset County Properties Ltd | Real estate | 2015 |
| Dorset Demolition Limited | Construction | 2022 |
| Dorset Money Ltd | Extraterritorial | 2021 |
| Dorset Storage Limited | Transport & logistics | 2016 |
| Duet Business Solutions Ltd | Administrative & support | 2026 |
| Dunsbury Way Limited | Construction | 2019 |
| Dynamis Elite Ltd | Arts & recreation | 2023 |
| Earlymark Limited | Financial services | 2025 |
| East Dorset Developments Limited | Construction | 2012 |
| Eastworth Farm Limited | Agriculture & fishing | 1958 |
| Eastworth Verwood Management Limited | Households | 2012 |
| Easytext Limited | Real estate | 2006 |
| Ebblake Properties Limited | Real estate | 2021 |
| EBH Consultancy Services Limited | Professional & scientific | 2019 |
| Elextra Solutions Ltd | Construction | 2014 |
| Elite Cleaning Ltd | Administrative & support | 2021 |
| Elliott Legal Services Limited | Professional & scientific | 2023 |
| Elysee Systems Limited | Water & waste | 2019 |
| Emerald Analytics Limited | Information & communication | 2024 |
| Emergency Medicine Ltd | Education | 2003 |
| Energiants Trading Co Ltd | Other services | 2026 |
| Environmental Drain Solutions Ltd | Construction | 2025 |
| Equestrianx Ltd | Wholesale & retail | 2019 |
| Evans & Traves LLP | | 2009 |
| Evans Technical Advisory Consulting Ltd | Professional & scientific | 2026 |
| Exbourne Manor Freehold Limited | Households | 2007 |
| Expert CNC Limited | Manufacturing | 2008 |
| Expert HR Solutions Limited | Administrative & support | 2012 |
| F Jenkins & SON Ltd | Administrative & support | 2025 |
| F.J Media Ltd | Information & communication | 2023 |
| Fabina Limited | Hospitality | 2025 |
| Fairwood Essentials Limited | Wholesale & retail | 2025 |
| Farrar & Brown Developments Ltd | Construction | 2026 |
| Fayrewood Electrical Limited | Construction | 2011 |
| Fayrewood Group Ltd | Construction | 2018 |
| Fieldrealm Limited | Health & social care | 2006 |
| Firecrest Timsbury Limited | Real estate | 2019 |
| Fischer Panda Group Limited | Professional & scientific | 2025 |
| Fischer Panda U.K. Holdings Limited | Financial services | 2025 |
| Fischer Panda U.K. Limited | Manufacturing | 1994 |
| Flamebaked Ltd | Hospitality | 2023 |
| Flash Gordon Removals Limited | Transport & logistics | 2022 |
| Flightpath Mentoring Ltd | Education | 2025 |
| Flux Pumps International (UK) Limited | Wholesale & retail | 1986 |
| Focus Fitness Personal Training Ltd | Arts & recreation | 2019 |