| Blxnk Limited | Manufacturing | 2024 |
| BM Gauge Calibration and Sales Limited | Professional & scientific | 2017 |
| BNB Transport Ltd | Transport & logistics | 2023 |
| BOB Ross Properties Ltd | Real estate | 2023 |
| Bob's Bricks Ltd | Wholesale & retail | 2023 |
| Bobel Transport Ltd | Transport & logistics | 2026 |
| Bobo Transport Limited | Transport & logistics | 2014 |
| Boda Construction Ltd | Construction | 2020 |
| Bodnetek Limited | Information & communication | 2020 |
| Bogita Trans Ltd | Transport & logistics | 2019 |
| Boing Rapid Secure Limited | Other services | 2009 |
| Bolton Turf & Landscapes Limited | Administrative & support | 2019 |
| Boltz Electrical Ltd | Construction | 2024 |
| Bombay TV Ltd | Information & communication | 2025 |
| Bond & Mann Property Management Ltd | Real estate | 2021 |
| Bonomi (UK) Limited | Wholesale & retail | 2002 |
| BOO Badger Limited | Financial services | 2024 |
| Boothby Engineering Limited | Manufacturing | 2010 |
| Borinada Limited | Information & communication | 2017 |
| Boro Leisure Limited | Arts & recreation | 2008 |
| Borough Taxis Ltd | Transport & logistics | 2025 |
| Bosit Group Ltd | Information & communication | 2023 |
| Bosworth Aesthetics & Beauty Ltd | Other services | 2010 |
| Bosworth Beauty Ltd | Other services | 2021 |
| Bosworth Business Management Limited | Professional & scientific | 2003 |
| Bosworth Dental Limited | Health & social care | 2008 |
| Bosworth Garage Limited | Wholesale & retail | 2005 |
| Bosworth Property Ltd | Real estate | 2021 |
| Boudica Project CIC | Arts & recreation | 2026 |
| Bougiedor Limited | Manufacturing | 2026 |
| Boujee Bakery Ltd | Hospitality | 2021 |
| Boujeee Dessert Ltd | Hospitality | 2025 |
| Bounce & Bosh Ltd | Arts & recreation | 2024 |
| Bournington Enterprises Ltd | Other services | 2017 |
| Bowen's Bodywork Limited | Wholesale & retail | 2019 |
| Bowplant Ltd | Agriculture & fishing | 2004 |
| Bows and Bobbles Ltd | Wholesale & retail | 2024 |
| Box Kraft UK Limited | Administrative & support | 2024 |
| Boxing Clever Academy Ltd | Arts & recreation | 2009 |
| Boxing Clever UK Ltd | Arts & recreation | 2008 |
| Boxwood Ltd | Wholesale & retail | 2021 |
| Boynton Investments Limited | Professional & scientific | 2019 |
| BQU Ltd | Wholesale & retail | 2025 |
| Bradford Arms Property Limited | Real estate | 2016 |
| Bradgate Earthworks Ltd | Construction | 2024 |
| Bradgate Environmental Services Ltd | Construction | 2024 |
| Bradgate Solutions Ltd | Professional & scientific | 2024 |
| Brahma Hills Ltd | Professional & scientific | 2026 |
| Bralex Service Ltd | Administrative & support | 2018 |
| Branar Trans Ltd | Transport & logistics | 2020 |
| Brandish Collis Installations Ltd | Construction | 2006 |
| Braunmann Ltd | Information & communication | 2016 |
| Breakfast House Ltd | Hospitality | 2022 |
| Breathe Pilates Coventry Ltd | Education | 2023 |
| Brenbuild Services Limited | Construction | 2016 |
| Brfc Ltd | Arts & recreation | 2024 |
| Briah Mccarthy Wellness Limited | Wholesale & retail | 2025 |
| Brian Ellison Racing Ltd | Arts & recreation | 2005 |
| Briarwood Limited | Wholesale & retail | 2025 |
| Bridal by Phoebe Valentine Ltd | Other services | 2023 |
| Bridge Farm Joinery Ltd | Construction | 2016 |
| Bridging Gems Ltd | Health & social care | 2024 |
| Bridgley Properties Ltd | Real estate | 2023 |
| Brik-It Ltd | Manufacturing | 2025 |
| Brindley Haulage Limited | Transport & logistics | 2021 |
| Brindley Management Company Limited | Households | 1993 |
| Brisacam Ltd | Health & social care | 2023 |
| Bristow Prototype Sheet Metal Work Limited | Manufacturing | 2006 |
| Brit Homes Ltd | Real estate | 2019 |
| Britannia Properties Investmens Limited | Construction | 2021 |
| Britna Ltd | Transport & logistics | 2020 |
| Brivora Limited | Manufacturing | 2024 |
| BRJ Building Ltd | Construction | 2023 |
| Broadridge Consulting Limited | Professional & scientific | 2019 |
| Broadway Chippy Limited | Hospitality | 2025 |
| Broadway Fishbar (Stoke on Trent) Limited | Hospitality | 2012 |
| Brogans Driver Resources Limited | Transport & logistics | 2016 |
| Bromage Theatre Company Limited | Education | 2004 |
| Bromfield Legal Holdings Ltd | Financial services | 2025 |
| Brookes Homes Ltd | Construction | 2021 |
| Bros. Invest Ltd. | Wholesale & retail | 2014 |
| Brown Bear CNC Design Ltd | Manufacturing | 2020 |
| Brown Bear Design Limited | Manufacturing | 2021 |
| Brownmonster Limited | Information & communication | 2015 |
| Brownsport Limited | Agriculture & fishing | 2004 |
| BRS Media Ltd | Information & communication | 2022 |
| Brwa Accounting Ltd | Professional & scientific | 2019 |
| Bryan Hill Ltd | Hospitality | 2019 |
| Brycam Ventures Limited | Construction | 2021 |
| BS Cleaning Academy Limited | Education | 2024 |
| BSB Change Consultancy Ltd | Information & communication | 2020 |
| BSJ Precision Ltd | Manufacturing | 2019 |
| BSM Lofts Ltd | Construction | 2019 |
| BTS Grab & Supply Ltd | Construction | 2020 |
| Bubiz Delish Limited | Hospitality | 2021 |
| Bucher Hydraulics Limited | Manufacturing | 1989 |
| Bucur Transport Limited | Transport & logistics | 2015 |
| Bulkington Tree Services Limited | Administrative & support | 2014 |
| Bumble Productions Ltd | Information & communication | 2019 |
| Bump & Bounce Ltd | Extraterritorial | 2025 |