| Baraine Limited | Extraterritorial | 2012 |
| Barber Fades Ltd | Other services | 2023 |
| Barcellos Holdings Limited | Information & communication | 2001 |
| Barfield Holdings Ltd | Financial services | 2021 |
| Bari Empire Ltd | Education | 2024 |
| Barrow Filling Station Limited | Real estate | 2006 |
| Barrow Golden Barber Ltd | Other services | 2024 |
| Barrow Reprographics (Loughborough) Limited | Real estate | 1973 |
| Bart Holdings Ltd | Financial services | 2025 |
| Bartlett Triathlon Limited | Extraterritorial | 2018 |
| Bartmac Limited | Transport & logistics | 2007 |
| Base FS Ltd | Administrative & support | 2013 |
| Base Inn Ltd | Hospitality | 2025 |
| Basi Software Ltd | Information & communication | 2012 |
| Bass Cottages Management Company Ltd | Households | 2024 |
| Bass Housing Ltd | Real estate | 2016 |
| Bast Inc Limited | Professional & scientific | 2010 |
| Batch Binary Ltd | Professional & scientific | 2024 |
| Bathing Comfort Ltd | Construction | 2020 |
| Batter Days Ltd | Hospitality | 2021 |
| Batterdays Loughborough Limited | Hospitality | 2024 |
| Bawdon Lodge Energy Limited | Wholesale & retail | 2015 |
| Bawdon Lodge Events Ltd | Wholesale & retail | 2014 |
| Bawdon Lodge Farm Limited | Extraterritorial | 2015 |
| Baxter Gate Properties Limited | Real estate | 1886 |
| BB4U Ltd | Real estate | 2025 |
| Bbhp Limited | Real estate | 2003 |
| BC Decorators Painting Contractors Limited | Construction | 2023 |
| BC Fellowship Ltd | Wholesale & retail | 2023 |
| BC Foods Ltd | Hospitality | 2021 |
| BC P&H Ltd | Construction | 2024 |
| BD Tax Solutions Ltd | Professional & scientific | 2018 |
| BDL Cooperation Limited | Professional & scientific | 2024 |
| BE Lifted Ltd | Arts & recreation | 2004 |
| Be.Ia Distribution UK Ltd | Information & communication | 2024 |
| Beacon Accounting Limited | Professional & scientific | 2017 |
| Beacon Commercial Solutions Ltd | Construction | 2021 |
| Beacon Design Ltd | Professional & scientific | 2017 |
| Beacon Inn Loughborough Ltd | Hospitality | 2021 |
| Beacon Link Limited | Information & communication | 1996 |
| Beaded Seat Company Ltd | Manufacturing | 2022 |
| Beamond and Brown Ltd | Wholesale & retail | 2024 |
| Beamwave Limited | Wholesale & retail | 2016 |
| Bearhouse Publishing Ltd | Information & communication | 2025 |
| Beautiful Gifts and Things Ltd | Wholesale & retail | 2020 |
| Beautique Loughborough Limited | Other services | 2012 |
| Beaver Engineering Ltd | Professional & scientific | 2024 |
| Beckwood Design Limited | Manufacturing | 2018 |
| Becs Midlands Ltd | Construction | 2024 |
| Bedford & Taylor Ltd | Professional & scientific | 2021 |
| Bedford Workspace Ltd | Real estate | 2011 |
| BEE BOY Jack Limited | Extraterritorial | 2022 |
| Beech Consultancy Limited | Professional & scientific | 2022 |
| Beegibbs Limited | Administrative & support | 2011 |
| Beehive Technology Ltd | Other services | 2019 |
| Beeston Build Limited | Construction | 2014 |
| BEJ Limited | Transport & logistics | 2020 |
| BEL Grierson Garden Design Limited | Administrative & support | 2020 |
| Belair Limited | Real estate | 2011 |
| Bell Foundry (Loughborough) Ltd | Hospitality | 2023 |
| Bell Foundry Collection Limited | Arts & recreation | 2010 |
| Bella Costa Limited | Extraterritorial | 2009 |
| Belle Escape Ltd | Other services | 2019 |
| Bellus Housing CIC | Real estate | 2024 |
| Belmed Ltd | Health & social care | 2012 |
| Belsize Investments Limited | Real estate | 2012 |
| Beltoft Residents Association Company Limited | Households | 2014 |
| Belvoircare Ltd. | Health & social care | 2012 |
| BEN Harris Physiotherapy Ltd. | Health & social care | 2015 |
| BEN Harris Property Ltd | Real estate | 2018 |
| Benchmark Fencing Co Ltd | Construction | 2020 |
| Benchmark Property Limited | Professional & scientific | 2005 |
| Benjamin Hammonds Wilson Limited | Professional & scientific | 2022 |
| Benjamin Pimlico Property Limited | Real estate | 2026 |
| Benjamin Pimlico PUB Company Limited | Arts & recreation | 2013 |
| Bennett Automation & Controls Limited | Manufacturing | 2013 |
| Benskin Properties Limited | Financial services | 2020 |
| Benson Holdings Limited | Financial services | 2026 |
| Bequest Properties Limited | Real estate | 2019 |
| Berakah Investments Ltd | Financial services | 2021 |
| Berlo Ltd | Real estate | 2016 |
| Bernard William Limited | Arts & recreation | 2019 |
| Berrelli Limited | Construction | 2018 |
| BES Valeting Centre Ltd | Wholesale & retail | 2022 |
| Besilda Ltd | Extraterritorial | 2010 |
| Bespoke Build Building and Joinery Services Ltd | Manufacturing | 2021 |
| Bespoke Landscaping and Fencing Ltd | Administrative & support | 2017 |
| Bespoke Property Solutions Limited | Real estate | 2004 |
| Bespoke Studio Solutions Limited | Manufacturing | 2026 |
| BEST4FINANCE Limited | Financial services | 2019 |
| Bestwick Properties Limited | Real estate | 2025 |
| Beta Town Planning Limited | Professional & scientific | 2025 |
| Beta Wealth Management Limited | Financial services | 2017 |
| Betdynamics Limited | Information & communication | 2012 |
| Beth Bryant Composites Ltd | Manufacturing | 2025 |
| Bethany Wray Ltd | Other services | 2012 |
| Betties Boozers Limited | Hospitality | 2024 |
| Betts and Broughton Limited | Extraterritorial | 2017 |
| Bexon Engineering Services Ltd | Professional & scientific | 2025 |
| Beyond Property Holdings Ltd | Real estate | 2018 |