| Bambury Art Ltd | Arts & recreation | 2023 |
| Bay 911 a Limited | Real estate | 2018 |
| Baysek Machine & Engineering Ltd | Construction | 2007 |
| BB and G Electrical Ltd | Construction | 2025 |
| BB Evolution Limited | Wholesale & retail | 2023 |
| Bcomp 408 Limited | Administrative & support | 2010 |
| BDS Electrical Services Ltd | Extraterritorial | 2018 |
| BDU 887 Ltd | Administrative & support | 2025 |
| BE My Group Ltd | Wholesale & retail | 2022 |
| Beale Garage Limited | Wholesale & retail | 2001 |
| Bean & Banter Limited | Hospitality | 2026 |
| Beard & Associates Limited | Professional & scientific | 1999 |
| BEE Green (Yorkley) CIC | Professional & scientific | 2020 |
| BEE Green Energy Ltd. | Energy | 2009 |
| BEE Green Solar Holdings Limited | Energy | 2015 |
| Beechway Software Ltd | Information & communication | 2022 |
| Beegreen Energy Holdings Limited | Financial services | 2020 |
| Beegreen Limited | Administrative & support | 2002 |
| Beegreen NRG Limited | Other services | 2011 |
| Beegreen Technology Limited | Energy | 2001 |
| Belmont Bros Ltd | Manufacturing | 2020 |
| Belmont Technologies Limited | Information & communication | 2008 |
| Benjamin S P Limited | Wholesale & retail | 2016 |
| Bevan Zimmermann Limited | Real estate | 2008 |
| Bevcom Limited | Information & communication | 2015 |
| BGS 102 Holdings Limited | Financial services | 2020 |
| BGS 102 Yorkley Solar Park Limited | Energy | 2013 |
| BGS 103 Holdings Limited | Financial services | 2020 |
| BGS 103 Hurst Solar Park Limited | Energy | 2013 |
| BGS 104 Holdings Limited | Financial services | 2020 |
| BGS 104 Sedbury Solar Park Limited | Energy | 2013 |
| Bibistef Ltd | Transport & logistics | 2019 |
| Bibliotheca Alexandrina Ltd | Information & communication | 2013 |
| Bisarto Limited | Professional & scientific | 2015 |
| Bishop Property Valuations Limited | Professional & scientific | 2025 |
| Black Rock Development Group Limited | Real estate | 2016 |
| Blades Property Ltd | Construction | 2021 |
| Blankley Consulting Limited | Professional & scientific | 2011 |
| Bloblogic Limited | Extraterritorial | 2012 |
| Blogg Consultancy Limited | Administrative & support | 2015 |
| BMJ - Dartmouth Ltd | Construction | 2019 |
| BMJ - London Ltd | Financial services | 2022 |
| Boat House Monmouth Ltd | Wholesale & retail | 2024 |
| Bonnie Stains Ltd | Wholesale & retail | 2025 |
| Born to BE Wild Events Ltd | Other services | 2026 |
| BOW Lane Holdings Ltd | Financial services | 2021 |
| Box and Company Accountancy Services Limited | Professional & scientific | 2022 |
| Boxfresh Ltd | Wholesale & retail | 2022 |
| Bramley Accountancy Ltd | Professional & scientific | 2026 |
| Braston New Energy Limited | Energy | 2023 |
| Bravens Digital Ltd | Professional & scientific | 2023 |
| Bream Rugby Football Club Limited | Arts & recreation | 2013 |
| Breeze Technologies Ltd | Manufacturing | 2003 |
| Brice Bricklaying Limited | Construction | 2017 |
| Bristol Channel Ships Limited | Manufacturing | 2014 |
| Brockweir CIC | Arts & recreation | 2016 |
| Bryan Morris (Contracting) Limited | Agriculture & fishing | 2014 |
| Buds to Bloom Ltd | Education | 2019 |
| Buildrite (Southwest) Limited | Construction | 2025 |
| Buttersmiths Limited | Administrative & support | 2026 |
| BWA Home Improvement Ltd. | Construction | 2019 |
| C & DS Properties Ltd | Real estate | 2019 |
| C G P Contracting Limited | Construction | 2002 |
| C Squared Property Developments (Billericay) Ltd | Real estate | 2022 |
| C Squared Property Developments (Chippenham) Limited | Real estate | 2016 |
| C Squared Property Developments (Eversley Cross) Ltd | Real estate | 2022 |
| C Squared Property Developments (Kemsing) Limited | Real estate | 2019 |
| C Squared Property Developments (Murrell Hill Grange) Ltd | Real estate | 2022 |
| C Squared Property Developments (Rowledge) Ltd | Real estate | 2020 |
| C Squared Property Developments (Westerham) Ltd | Real estate | 2022 |
| C Squared Property Developments Ltd | Real estate | 2015 |
| C&N Utilities Ltd | Construction | 2025 |
| C.P.S. Plumbing & Heating Contractors Ltd. | Construction | 2006 |
| C2PD (Holdings) Limited | Real estate | 2019 |
| Cadora Equine Ltd | Wholesale & retail | 2020 |
| Cadora Woods Ltd | Hospitality | 2019 |
| Calibrae Learning Ltd | Information & communication | 2011 |
| Calx Financial Limited | Extraterritorial | 2025 |
| Camp Hillcrest Limited | Education | 2016 |
| Campersand Ltd | Professional & scientific | 2024 |
| Capable Consulting Ltd | Professional & scientific | 2012 |
| Career Voyage Limited | Other services | 2011 |
| Casco Logistics & Marketing Ltd | Wholesale & retail | 2011 |
| Cc's Woolaston Service Station Limited | Wholesale & retail | 2007 |
| CCM Distribution Ltd | Wholesale & retail | 2026 |
| CDS Consultancy & Project Management Ltd | Real estate | 2012 |
| Central Garage Lydney Ltd | Wholesale & retail | 2024 |
| Chapel I T Ltd | Information & communication | 2000 |
| Charles Ward (Holdings) Limited | Administrative & support | 1981 |
| Cherry Renewables Limited | Real estate | 2014 |
| Child's Play Cafe Thornbury Ltd | Hospitality | 2025 |
| Chilliz Lydney Limited | Hospitality | 2022 |
| Chimney Sweep Theatre Company Limited | Administrative & support | 2013 |
| Chimney Sweep Theatricals Limited | Other services | 2014 |
| Chips Away Bristol Ltd | Wholesale & retail | 1999 |
| Chisel & Stone Limited | Administrative & support | 2023 |
| Chosen Properties Limited | Construction | 2009 |
| Chris Hallaways Services Ltd | Information & communication | 2021 |
| Church Road Place Management Limited | Households | 1998 |
| Cinderfordphones Limited | Wholesale & retail | 2023 |