| Braunstone Gate Properties Limited | Real estate | 2009 |
| Braunstone Life | Information & communication | 2016 |
| Braunstone Mini Market Ltd | Wholesale & retail | 2024 |
| Braunstone Property Limited | Real estate | 2023 |
| Braunstonefryer Limited | Hospitality | 2020 |
| Braunwins Limited | Real estate | 2007 |
| Bravia Investments & Management Limited | Other services | 2016 |
| Bravo Resturants Limited | Hospitality | 2020 |
| Bravorb Limited | Professional & scientific | 2025 |
| Bray & Bray LLP | | 2020 |
| Bread ND Butter Ltd | Wholesale & retail | 2023 |
| Breakfast Sandwiches & Snacks Online Ltd | Hospitality | 2019 |
| Breakout Music Limited | Information & communication | 2024 |
| Breakthrough 4 Health Ltd | Wholesale & retail | 2019 |
| Breakthrough Brands Limited | Wholesale & retail | 2016 |
| Bream Yogurt Ltd | Wholesale & retail | 2022 |
| Breast Specialist Care Ltd | Health & social care | 2021 |
| Breathfull 03 Limited | Real estate | 2019 |
| Breathfull 50 Limited | Real estate | 2023 |
| Breathfull 9 Limited | Real estate | 2019 |
| Brecon Debt Recovery Limited | Extraterritorial | 1965 |
| Bredariol Financial Ltd | Financial services | 2023 |
| Bredariol Properties Limited | Real estate | 2024 |
| Breechoak Ltd | Professional & scientific | 2026 |
| Breeno's Kitchen Ltd | Hospitality | 2018 |
| Breeze Greenfield Ltd | Agriculture & fishing | 2026 |
| Breeze Solutions Limited | Wholesale & retail | 2009 |
| Breja Group Limited | Administrative & support | 2022 |
| Brelades (Midlands) Limited | Real estate | 2008 |
| Brenchley Finest Ltd | Transport & logistics | 2018 |
| Brenlough Ltd | Wholesale & retail | 2025 |
| Brent Signs & Graphics Ltd | Administrative & support | 2017 |
| Brentknoll Brean Ltd | Wholesale & retail | 2024 |
| Brenton Group Limited | Wholesale & retail | 2022 |
| Brepoet-Uk Ltd | Wholesale & retail | 2022 |
| Brett Turner Limited | Construction | 2025 |
| Brevtech Ltd | Wholesale & retail | 2025 |
| Brew and Bites (Chorely) Ltd | Hospitality | 2025 |
| Brew Compliance Ltd | Construction | 2020 |
| Brewcode Limited | Wholesale & retail | 2024 |
| Brexpress Logistics Limited | Wholesale & retail | 2025 |
| BRF Electrical Services Ltd | Construction | 2023 |
| BRG Group Limited | Real estate | 2020 |
| Brgr LAB Leicester Ltd | Hospitality | 2024 |
| Brian Harriman Ltd | Construction | 2024 |
| Brian James Lifestyle Limited | Health & social care | 2021 |
| Brian Leonard Bailey Ltd | Extraterritorial | 2023 |
| Brian Roger Brindley Limited | Extraterritorial | 2010 |
| Briar Court Management Limited | Other services | 1982 |
| Briarmeads Investments Limited | Real estate | 1998 |
| Briarmeads Practice LLP | | 2002 |
| Brice Homes Limited | Construction | 2006 |
| Brick 91 Limited | Real estate | 2019 |
| Brick a Brick Limited | Real estate | 2024 |
| Brick Bosses Ltd | Real estate | 2024 |
| Brick Destiny Limited | Real estate | 2025 |
| Brick IT Building Ltd | Construction | 2021 |
| Brick Lane Chai Ltd | Hospitality | 2021 |
| Brick Yard Farm Meadows Limited | Real estate | 2024 |
| Brickabc Ltd | Manufacturing | 2026 |
| Bricken Services Limited | Health & social care | 2014 |
| Bricklayers World UK Ltd | Wholesale & retail | 2024 |
| BRICKLAYERS4YOU Limited | Construction | 2022 |
| Brickline Builders Ltd | Construction | 2025 |
| Brickmaster Toys Ltd | Wholesale & retail | 2025 |
| Brickr Properties Ltd | Real estate | 2020 |
| Bricks & Home Property Group Ltd | Real estate | 2022 |
| Brickstones Management Limited | Households | 2020 |
| Bricksy Construction Ltd | Construction | 2025 |
| Brickwork Mathematics Limited | Education | 2017 |
| Brickworks Real Estate Ltd | Real estate | 2018 |
| Bride Street Capital LLP | | 2013 |
| Bride Street Capital Partners Ltd | Real estate | 2013 |
| Bride Street Investors Ltd. | Financial services | 2011 |
| Brides of Bond Street Limited | Manufacturing | 1991 |
| Bridge 67 Limited | Wholesale & retail | 2020 |
| Bridge Aluminium Limited | Manufacturing | 2015 |
| Bridge and Bulk Limited | Wholesale & retail | 2026 |
| Bridge Car Services [Leicester] Ltd | Other services | 2017 |
| Bridge Equity Limited | Real estate | 2026 |
| Bridge Gate Homecare Limited | Health & social care | 2020 |
| Bridge House Barn Ltd | Real estate | 1999 |
| Bridge House Independent School Limited | Education | 2017 |
| Bridge International Ltd | Wholesale & retail | 2025 |
| Bridge Management Group Ltd | Financial services | 2021 |
| Bridge Plant Limited | Administrative & support | 2017 |
| Bridge Records Limited | Information & communication | 2025 |
| Bridge ST Pharm Ltd | Wholesale & retail | 2025 |
| Bridgeford Developments (Midlands) Ltd | Real estate | 2007 |
| Bridgemere Close Management Company Limited | Households | 2020 |
| Bridgepool Limited | Financial services | 2024 |
| Bridgetown Holdco Limited | Financial services | 2023 |
| Bridgeview Developments Limited | Manufacturing | 2024 |
| Bridgeview Solutions Ltd | Information & communication | 2025 |
| Bridgeway Venture Ltd | Construction | 2019 |
| Bridgewell Futures Ltd | Health & social care | 2025 |
| Bridgford Furniture Limited | Manufacturing | 2018 |
| Briefed Solutions Limited | Administrative & support | 2025 |
| Brierfield Car Sales Limited | Wholesale & retail | 2022 |
| Briggington Ltd | Transport & logistics | 2015 |