| Black Horse Investments (UK) Ltd | Other services | 1993 |
| Black TOR Enterprises Ltd | Wholesale & retail | 2012 |
| Blackhall Holdings Ltd | Agriculture & fishing | 2026 |
| Blacks Delicatessen Limited | Wholesale & retail | 2009 |
| Blatchford Court Management Company Limited | Households | 2019 |
| Blent Group Limited | Manufacturing | 2025 |
| Blindaid | Health & social care | 1970 |
| Blue Balloon Invest Ltd | Financial services | 2018 |
| Blue Sky Accounting (SW) Ltd | Professional & scientific | 2024 |
| Blueprint Financial Planning Limited | Financial services | 2026 |
| Bond Taxi Ltd | Transport & logistics | 2024 |
| Bowater Investments Limited | Real estate | 2025 |
| Bowdens Nursery Ltd | Agriculture & fishing | 2017 |
| Brian Letheren Limited | Real estate | 1959 |
| Brightley Mill Limited | Real estate | 1945 |
| Brionne Heights Okehampton Management Company Limited | Households | 2005 |
| Broadwater Park Golf Club Limited | Arts & recreation | 1985 |
| Brothers Exeter Ltd | Hospitality | 2025 |
| Bruce Rigal Consulting Limited | Professional & scientific | 2014 |
| Burgers in General Limited | Hospitality | 2026 |
| Burridge Printers Limited | Manufacturing | 2012 |
| Bush Broadband Limited | Information & communication | 2004 |
| Butterford Accountancy Services Limited | Professional & scientific | 2012 |
| Button Meats Limited | Wholesale & retail | 2008 |
| Buxum (UK) Limited | Manufacturing | 2015 |
| Bwbca Limited | Professional & scientific | 2015 |
| Byeloise Limited | Wholesale & retail | 2014 |
| C & D Furnishings Ltd | Wholesale & retail | 2017 |
| C & M Water Ltd | Construction | 2022 |
| C G Education Services Ltd | Education | 2025 |
| C Guscott Plant Hire and Groundworks Ltd | Construction | 2022 |
| C&E Training & Accountancy Ltd | Professional & scientific | 2021 |
| C.Nielson & SON Limited | Real estate | 1955 |
| CAB Construction (SW) Ltd | Construction | 2020 |
| Cadra Insights Limited | Professional & scientific | 2024 |
| Cafe Ember Spice Ltd | Hospitality | 2026 |
| Cafe Light Spice Limited | Hospitality | 2023 |
| Camberwell Logistics Limited | Transport & logistics | 2024 |
| Camilla Millie Ltd | Health & social care | 2023 |
| Camilla Whitehouse Ltd | Professional & scientific | 2020 |
| Canns Models Ltd | Wholesale & retail | 2019 |
| Carewith Ltd | Information & communication | 2025 |
| Carmel Coaches Limited | Transport & logistics | 2010 |
| Caskhouse Ltd | Hospitality | 2017 |
| Castle Inn Lydford Ltd | Hospitality | 2021 |
| Castle Lane (Torquay) Management Company Limited | Real estate | 1990 |
| Castle Testing Solutions Limited | Information & communication | 2025 |
| Castleford Maintenance Ltd | Households | 2021 |
| Cavalier Holdings Limited | Professional & scientific | 2016 |
| Cawsedesign Ltd | Professional & scientific | 2025 |
| Central Garages (Dartmoor) Limited | Wholesale & retail | 2016 |
| Chadwick & Wills Group Limited | Construction | 2026 |
| Chadwick & Wills Properties Ltd | Real estate | 2025 |
| Chagstock Limited | Arts & recreation | 2007 |
| Champion Property Developments Ltd | Real estate | 2025 |
| Chandmana Erdene Community Interest Company | Hospitality | 2023 |
| Characters Inc Ltd | Arts & recreation | 2019 |
| Charge Management & Advisory Ltd | Professional & scientific | 2021 |
| Charlyned Ltd | Education | 2022 |
| Chfi Limited | Professional & scientific | 1999 |
| Chris and Emma Brendon Ltd | Administrative & support | 2025 |
| Chutzpah Ltd | Financial services | 2003 |
| Citrus Television Limited | Information & communication | 2009 |
| Claire the Cleaning Lady Ltd | Administrative & support | 2024 |
| Clark Ecommerce Limited | Wholesale & retail | 2025 |
| Clayton Cabinets Limited | Other services | 2022 |
| Cleave Close Management Company Ltd | Households | 2020 |
| Clinical Architecture Limited | Information & communication | 2013 |
| Clive Baker Consultancy Ltd | Professional & scientific | 2019 |
| CMS Deliveries Ltd | Transport & logistics | 2025 |
| CO.CRE8 Ltd | Professional & scientific | 2006 |
| Coderunner Consulting Ltd | Information & communication | 2016 |
| Cogito IT Services Limited | Information & communication | 2018 |
| Community Links SW CIC | Education | 2011 |
| Condor Property Limited | Real estate | 2019 |
| Construction Tradesmen Limited | Manufacturing | 2023 |
| Control Information Technology Limited | Information & communication | 1994 |
| Coombe Head Management Company Limited | Households | 2002 |
| Core Water Solutions Limited | Water & waste | 2026 |
| Costwise Limited | Wholesale & retail | 2012 |
| Country Bumpkin Care Limited | Health & social care | 2023 |
| Country to Coast Limited | Hospitality | 2020 |
| Craft and Golf Investments Limited | Financial services | 2025 |
| Crafted Industrial Limited | Manufacturing | 2025 |
| CRED04 Ltd | Public administration | 2015 |
| Critchley Building Contractors Ltd | Construction | 2025 |
| Cropmech Ltd | Agriculture & fishing | 2011 |
| Cross Devon Limited | Construction | 2025 |
| Crosshill Engineering Ltd | Wholesale & retail | 2012 |
| Crowd Insight Limited | Information & communication | 2017 |
| CSMO18 Limited | Wholesale & retail | 2023 |
| Cunningham PIC Ltd | Professional & scientific | 2019 |
| Custom Install Limited | Wholesale & retail | 2005 |
| Cyber Systems Limited | Information & communication | 1993 |
| D & C SS Ltd | Wholesale & retail | 2025 |
| D J Heard Fencing Ltd | Other services | 2022 |
| D J Stallion Ltd | Professional & scientific | 2014 |
| D M Groundworks & Landscaping Ltd | Construction | 2023 |
| D N K Properties Limited | Real estate | 2003 |
| D.A. & L.A. Holwill Limited | Manufacturing | 2003 |