| Brio International Trading Ltd | Administrative & support | 2009 |
| British Flora Limited | Wholesale & retail | 2023 |
| BRM Racing Ltd | Wholesale & retail | 2024 |
| Broke-Smith Motor Sport Limited | Wholesale & retail | 2013 |
| Brook Barn Boarding Limited | Hospitality | 2023 |
| Brook Business Park Service Charge Limited | Households | 2024 |
| Brook Hudson Ltd | Real estate | 2025 |
| Brookes Bowen Development Ltd | Construction | 2024 |
| Brookes Hampton Ltd | Real estate | 2013 |
| Brookside Barbers Ltd | Other services | 2026 |
| Brookside Road Stores Ltd | Wholesale & retail | 2024 |
| Brookvale Solutions Ltd | Professional & scientific | 2021 |
| Brown Matthews Architects Limited | Professional & scientific | 2006 |
| BSC Coffee Stratford Upon Avon Limited | Hospitality | 2024 |
| Bsey Consultants Limited | Information & communication | 2009 |
| Bstr Invest Ltd | Wholesale & retail | 2019 |
| Bubas House Ltd | Real estate | 2026 |
| Buckley Property Partnership Limited | Real estate | 2016 |
| Build U Fitness Limited | Health & social care | 2021 |
| Building Improvements Limited | Construction | 2012 |
| Building Profiles Limited | Wholesale & retail | 1977 |
| Buildinglog Ltd | Manufacturing | 2024 |
| Bulanadi Perfume Legit Ltd | Wholesale & retail | 2025 |
| Bungee Fitness Club Limited | Arts & recreation | 2023 |
| Buratti Group Holdings Limited | Extraterritorial | 2007 |
| Burgeco Ltd | Financial services | 2025 |
| Burgermob Ltd | Hospitality | 2025 |
| Burlesque on Ice Limited | Arts & recreation | 2013 |
| Burnside Hotel Limited | Hospitality | 2019 |
| BUS Rentals Limited | Administrative & support | 2006 |
| Busby & Goodfellow's Ltd | Administrative & support | 2017 |
| Business Improvement Research & Consultancy in Health | Professional & scientific | 2010 |
| Business Services & Accounting Limited | Administrative & support | 2007 |
| Business Utilities Group Ltd | Energy | 2019 |
| Buying Management Ltd | Wholesale & retail | 2022 |
| Buzzberries Limited | Agriculture & fishing | 2024 |
| Byrd Farming Limited | Agriculture & fishing | 2003 |
| C & S Balchin Limited | Administrative & support | 2003 |
| C & S Bloodstock Ltd | Agriculture & fishing | 2017 |
| C B Wilson Ltd | Information & communication | 2012 |
| C Concannon Management Ltd | Professional & scientific | 2018 |
| C D Management Limited | Real estate | 2018 |
| C G Optical Limited | Health & social care | 2017 |
| C G S Properties Limited | Real estate | 2012 |
| C K Fires Limited | Manufacturing | 2005 |
| C Wiltshire & Co Stratford Limited | Professional & scientific | 2002 |
| C Wiltshire AS Ltd | Professional & scientific | 2023 |
| C&C Good Food Company Ltd | Manufacturing | 2019 |
| C&S Actually Ltd | Financial services | 2022 |
| C. Padbury Limited | Construction | 1975 |
| CA Contract Limited | Professional & scientific | 2007 |
| Cacao for the Soul Ltd | Wholesale & retail | 2025 |
| Cactus Estates Limited | Real estate | 2020 |
| Cadabrart Ltd | Professional & scientific | 2023 |
| Cafe Cocktail CJM Group Ltd | Hospitality | 2022 |
| Caffeine and Machine (Emporium) Limited | Wholesale & retail | 2023 |
| Caffeine and Machine (Houndshill) Limited | Hospitality | 2022 |
| Caffeine and Machine (Knockerdown) Limited | Hospitality | 2022 |
| Caffeine and Machine Ltd | Hospitality | 2018 |
| Caine and Brown Consulting Limited | Professional & scientific | 2010 |
| Calamus Quantum Limited | Wholesale & retail | 2021 |
| Calamus UK Ltd | Manufacturing | 2021 |
| Calculus Urology Services Ltd | Health & social care | 2018 |
| Cambridgeshire Academics Ltd | Information & communication | 2021 |
| Camper King Limited | Administrative & support | 2010 |
| Camperking Holdings Limited | Real estate | 2016 |
| Cantermain Limited | Arts & recreation | 1982 |
| Cape Motors Ltd | Wholesale & retail | 2015 |
| Capital Asset Accounting Ltd | Professional & scientific | 2020 |
| Capitalnest Ventures Limited | Hospitality | 2026 |
| Captivate Brands Ltd | Manufacturing | 2016 |
| Capulet House Limited | Real estate | 2021 |
| Caramore Consultancy Limited | Professional & scientific | 2014 |
| Cardiogeni PLC | Professional & scientific | 2016 |
| Care and Compasion Ltd. | Health & social care | 2015 |
| Care Business Associates Limited | Professional & scientific | 2023 |
| Care With Excellence Ltd | Other services | 2024 |
| Carian Interiors Limited | Wholesale & retail | 2008 |
| Carjam Paints Limited | Construction | 2024 |
| Carlagin Limited | Households | 1981 |
| Carr's Histopathology Ltd | Health & social care | 2015 |
| Carse Gray Renewables Limited | Energy | 2013 |
| Carsley Consultancy Services Limited | Professional & scientific | 2024 |
| Carter Landscapes Limited | Administrative & support | 2006 |
| Carwise Services Limited | Wholesale & retail | 2024 |
| Casey Construction (Midlands) Limited | Construction | 2012 |
| Castle International Trading Limited | Wholesale & retail | 2020 |
| Castlewellan House Limited | Real estate | 2012 |
| Catalyst Sales Consultancy Ltd | Professional & scientific | 2025 |
| Cater Buddy Ltd | Professional & scientific | 2013 |
| Caterina Belluardo Ltd | Manufacturing | 2013 |
| Causeway Management Services Ltd. | Hospitality | 2001 |
| Cavalla Ltd | | 2008 |
| CAW Planning Ltd | Construction | 2026 |
| CC Management Ltd | Real estate | 2015 |
| Ccblank Ltd | Wholesale & retail | 2026 |
| CCL (Computer Consultants) Ltd | Information & communication | 1986 |
| CCL (North) Limited | Information & communication | 2000 |
| CCL (Solutions) Group Ltd | Financial services | 2012 |
| CCL Cyber Solutions Limited | Information & communication | 2018 |