| Bramfield Limited | Professional & scientific | 1996 |
| Bramley Products Ltd | Wholesale & retail | 2012 |
| Breezie Filters Ltd | Wholesale & retail | 2022 |
| Brentor Capital Ltd | Financial services | 2021 |
| Bret Lewis Contracting Ltd | Manufacturing | 2026 |
| Briarmount Limited | Professional & scientific | 1989 |
| Bright Minds Capital Ltd | Professional & scientific | 2018 |
| Bright Tiger Builders Ltd | Administrative & support | 2017 |
| Bristol RAW K9 Foods Ltd | Wholesale & retail | 2014 |
| British Chinese Consulting Ltd | Extraterritorial | 2017 |
| Brookes Sivyer Limited | Professional & scientific | 1999 |
| Burfitt & Garrett Ltd | Construction | 1999 |
| Burr Woodworks Ltd | Manufacturing | 2022 |
| Bustard Flying Club Limited | Arts & recreation | 1962 |
| Butler-Hall Engineering Ltd | Water & waste | 2006 |
| Bwwb Limited | Real estate | 2003 |
| CAF Construction Ltd | Construction | 2003 |
| Camdenday Limited | Professional & scientific | 2012 |
| Camill Joinery Company Limited | | 1966 |
| Campaign for Real Wine Limited | Wholesale & retail | 2004 |
| Cann Mills Limited | Manufacturing | 2003 |
| Canvas Landscapes Ltd | Manufacturing | 2025 |
| Care Jobs Limited | Information & communication | 2024 |
| Carina’S Village Paws Ltd | Other services | 2025 |
| Castlederry Financial Consultants Limited | Financial services | 2008 |
| CBL Backdrops Limited | Manufacturing | 2018 |
| CC Towing Services Ltd | Transport & logistics | 2020 |
| Celona Consulting Ltd | Professional & scientific | 2024 |
| Centurion Medical Services Limited | Health & social care | 2023 |
| Chaffers (Blandford) Limited | Real estate | 2013 |
| Chameleon Resources Ltd | Financial services | 2002 |
| Charleston Limited | Other services | 1992 |
| Chewinthecud Ltd | Administrative & support | 2022 |
| Chip OFF the Block Events Limited | Hospitality | 2019 |
| Chloe Roberts Interiors Ltd | Professional & scientific | 2022 |
| Chris Sheffield Ltd | Wholesale & retail | 2012 |
| Church Close (Fontmell Magna) Management Company Ltd | Households | 2024 |
| Church Farm Barns Management Company Limited | Real estate | 1999 |
| CJ PYM Electrical Ltd | Construction | 2020 |
| Cleantex CLE (Bristol) Ltd | Other services | 2017 |
| Clever Solutions Ltd | Professional & scientific | 2021 |
| Clifford T Shean Limited | Construction | 2003 |
| Clinical Partners Group Limited | Financial services | 2024 |
| Clinical Partners Limited | Professional & scientific | 2011 |
| Cloud Wrestlers Ltd | Wholesale & retail | 2022 |
| Coastal Dispense Ltd | Extraterritorial | 2022 |
| Cobblebox Ltd | Information & communication | 2020 |
| Cobra Public Relations Limited | Public administration | 2012 |
| Collarways Limited | Wholesale & retail | 2004 |
| Collis Elmore Limited | Construction | 2022 |
| COMM21 Ltd | Extraterritorial | 2008 |
| Commanding Heights Ltd | Administrative & support | 2022 |
| Compton Smith Interiors Limited | Wholesale & retail | 2018 |
| Conti Engineering Ltd | Other services | 2011 |
| Cooperage Close Management Company Limited | Households | 2020 |
| Corecroft Business Services Limited | Manufacturing | 2001 |
| Corita Rose Ltd | Manufacturing | 2010 |
| Cornerplot Business Solutions Limited | Information & communication | 2007 |
| Cornwall Support Ltd | Administrative & support | 2012 |
| Cougar Computers Limited | Wholesale & retail | 1999 |
| Country Cabs Limited | Transport & logistics | 2003 |
| Countryside Boundaries Ltd | Professional & scientific | 2010 |
| COX Martin Design Ltd | Professional & scientific | 2014 |
| CPD Specialist Works and Tree Care Ltd | Agriculture & fishing | 2023 |
| CR Shaftesbury Ltd | Hospitality | 2022 |
| Cranbornes of Shaftesbury Limited | Wholesale & retail | 2018 |
| Creative People Perspective Limited | Other services | 2014 |
| Crook and Churn Dairy Ltd | Wholesale & retail | 2007 |
| Crosse Construction Ltd | Construction | 2023 |
| Crossmark Group Ltd | Professional & scientific | 2026 |
| CSH Properties Limited | Real estate | 2011 |
| Culturesconnect Ltd | Professional & scientific | 2011 |
| Custom Tree Care Limited | Agriculture & fishing | 2019 |
| D & H Dairying Limited | Agriculture & fishing | 2021 |
| D&S Cable Braiding Ltd | Manufacturing | 2008 |
| D-Lux Plumbing Limited | Construction | 2002 |
| Dairy House Antiques Limited | Administrative & support | 2014 |
| Daniel Combes Garden Design Ltd | Administrative & support | 2018 |
| Daniel House & Co Limited | Professional & scientific | 2014 |
| Dark Night Horror Ltd | Information & communication | 2021 |
| Darwin Ecology Ltd | Professional & scientific | 2011 |
| DCM Tyre and Autocentres Ltd | Wholesale & retail | 2022 |
| DCM Vehicle Rentals Ltd | Administrative & support | 2024 |
| Deckdale Limited | Arts & recreation | 2018 |
| Dedication Stories Limited | Information & communication | 2018 |
| Defence Safety Limited | Public administration | 2023 |
| Designed in Ltd | Information & communication | 2019 |
| Detox Shield Ltd | Information & communication | 2019 |
| DGN Transport Ltd | Transport & logistics | 2026 |
| Diamond Fetish Limited | Administrative & support | 2024 |
| Dineley Farming Company Limited | Agriculture & fishing | 1989 |
| DIRT2DREAMS Ltd | Administrative & support | 2025 |
| Discoyd Limited | Professional & scientific | 2010 |
| Doctor in the House Limited | Administrative & support | 2003 |
| Donhead Ventures Limited | Real estate | 2004 |
| Dorset Bridge Ltd | Arts & recreation | 2014 |
| Dorset Centre of Excellence Limited | Education | 2021 |
| Dorset Farm Foods Limited | Wholesale & retail | 2020 |
| Dorset Land Rover Club Limited | Arts & recreation | 2008 |
| Dorset Lime Ltd | Construction | 2019 |