| Cool IT Refrigeration WSM Ltd | Manufacturing | 2026 |
| Coole Maintenance Limited | Professional & scientific | 2007 |
| Coombe Road Flat Management Company Ltd | Real estate | 2015 |
| Coombeside (W-S-M) Management Company Limited | Households | 2000 |
| Cooper Broadway Ltd | Hospitality | 2025 |
| Core Gym Solutions Limited | Manufacturing | 2026 |
| Corinnecapital Ltd | Hospitality | 2025 |
| Corker Wine Ltd | Wholesale & retail | 2024 |
| Corner Close (Winscombe) Management Limited | Households | 2012 |
| Cornish Assets Ltd | Real estate | 2025 |
| Cornish Care Limited | Health & social care | 2008 |
| Cornish Cottages Property Services Ltd | Hospitality | 2018 |
| Cornish-Lingfield Ltd | Real estate | 2024 |
| Cosmetixplus Ltd | Wholesale & retail | 2020 |
| Cosmin H Ltd | Transport & logistics | 2019 |
| Cosmin Logistik Limited | Administrative & support | 2016 |
| Costy Aurel Ltd | Transport & logistics | 2020 |
| Costy Delivery Ltd | Transport & logistics | 2021 |
| Costy Radu Ltd | Transport & logistics | 2021 |
| Cottage Massala Ltd | Hospitality | 2024 |
| Cougar Designs Limited | Professional & scientific | 2023 |
| Country Living Developments Lettings Limited | Real estate | 2025 |
| Country Retreat Southwest Ltd | Real estate | 2024 |
| County Cars Garage Ltd | Wholesale & retail | 2026 |
| County Flat Roofing (UK) Limited | Construction | 2009 |
| Court House (Cheddar) Ltd | Health & social care | 2012 |
| Covent Garden Electrical Testing Ltd | Construction | 2023 |
| COYS@16 Ltd | Construction | 2016 |
| CPS Complete Project Solutions Limited | Construction | 2013 |
| Craftsman Property Management Ltd | Real estate | 2024 |
| Crane Accountancy Limited | Professional & scientific | 2002 |
| Crawfords Appliances Ltd | Wholesale & retail | 2019 |
| Crawfords Electrical Repairs Ltd | Other services | 2019 |
| Crawfords Extreme Cleaning Limited | Administrative & support | 2018 |
| Crawfords Property Restoration & Cleaning Ltd | Administrative & support | 2011 |
| Creative Group (SW) Ltd | Wholesale & retail | 2026 |
| Creative Media Consulting Limited | Professional & scientific | 2020 |
| Creative Proposals Ltd | Professional & scientific | 2026 |
| Crescent Hideaway Ltd | Hospitality | 2020 |
| Crescent View Court (Maintenance) Limited | Households | 1976 |
| Crickham Park Limited | Agriculture & fishing | 2022 |
| CRM Cooks Limited | Information & communication | 2024 |
| Crosville Motor Services Limited | Transport & logistics | 2022 |
| Crowe About IT Limited | Professional & scientific | 2018 |
| Crows Mead Ltd | Manufacturing | 2025 |
| CRS Maritime Limited | Manufacturing | 2022 |
| CRT Autos Ltd | Wholesale & retail | 2016 |
| Crucialmaintenanceservices Ltd | Construction | 2023 |
| Crystal Clear Language Company Limited | Professional & scientific | 2016 |
| CS Cars WSM Ltd | Wholesale & retail | 2025 |
| CSB Solutions Ltd | Wholesale & retail | 2025 |
| CSG Carpentry and Maintenance Ltd | Construction | 2017 |
| CSG Hire Ltd | Administrative & support | 2022 |
| CSG Radford Properties Limited | Hospitality | 2016 |
| CSN Translines Ltd | Transport & logistics | 2021 |
| CSS Solar Ltd | Energy | 2022 |
| CT Civils Limited | Construction | 2021 |
| Ctech Industrial Abseiling Limited | Construction | 2017 |
| Ctgarmz Ltd | Wholesale & retail | 2024 |
| CUK Business Consulting Ltd | Professional & scientific | 2020 |
| Culpin’S Catches Ltd | Agriculture & fishing | 2025 |
| Cumberland House (Bristol) Flats Management Limited | Households | 1974 |
| Cunningham Safety Consultants Ltd | Professional & scientific | 2014 |
| Cuppa Architects Ltd | Professional & scientific | 2017 |
| Curley Brothers Property Limited | Extraterritorial | 2016 |
| Curry Explosion Limited | Extraterritorial | 2022 |
| CV Transport Solutions Ltd | Transport & logistics | 2020 |
| Cvkinvestments Ltd | Real estate | 2026 |
| CVS Enterprise Limited | Public administration | 2022 |
| CW Interiors Ltd | Construction | 2022 |
| CWA Property Management Ltd | Real estate | 2015 |
| CWH Consulting Ltd | Construction | 2020 |
| Cyberec Ltd | Information & communication | 2020 |
| Cyra Security Ltd | Information & communication | 2026 |
| D & M Darts Limited | Arts & recreation | 2021 |
| D & T Property (SW) Limited | Real estate | 2026 |
| D a Seaton Limited | Real estate | 2010 |
| D Francis Hire Ltd | Transport & logistics | 2020 |
| D Hallworth Ltd | Transport & logistics | 2017 |
| D J Thomas Roofing Limited | Construction | 2023 |
| D Sweeting Ltd | Transport & logistics | 2024 |
| D Tech Haulage and Services Ltd | Transport & logistics | 2026 |
| D&A (West) Ltd | Administrative & support | 2025 |
| D&D Cleaning Services SW Limited | Administrative & support | 2024 |
| D&D Exterior Specialists Ltd | Administrative & support | 2025 |
| D&D JET Wash & Valet Services Ltd | Administrative & support | 2024 |
| D&M KEN Enterprise Ltd | Real estate | 2025 |
| D-Eight Garage Limited | Wholesale & retail | 2010 |
| D.J.D. Carpentry Limited | Construction | 2009 |
| D.M.K. Electrical Services Limited | Construction | 1998 |
| D.R Building Services SW Ltd | Construction | 2023 |
| D.Uzski Transport Ltd | Transport & logistics | 2021 |
| DA Vinci House Limited | Households | 2011 |
| Daft COW Designs Limited | Manufacturing | 2025 |
| Dage Motor Services Ltd | Wholesale & retail | 2015 |
| Daikar Limited | Professional & scientific | 2007 |
| Daisychain Childcare (Weston) Ltd | Health & social care | 2019 |
| Dakota Group Services Limited | Administrative & support | 2025 |
| Dale & Company Ltd | Professional & scientific | 2003 |
| Dalesway Mobility Ltd | Wholesale & retail | 2025 |