| Benashour J Limited | Wholesale & retail | 2021 |
| Benedict Community Housing Ltd | Financial services | 2024 |
| Benf Engineering Limited | Professional & scientific | 2008 |
| Bengel Energy Ltd | Construction | 2025 |
| Bennetts Mechanical Engineering Ltd | Professional & scientific | 2017 |
| Bennetty Limited | Wholesale & retail | 2025 |
| Benson Motors Limited | Wholesale & retail | 2006 |
| Bentley Lounge Barbers Ltd | Administrative & support | 2021 |
| Beny’S Painters Limited | Construction | 2025 |
| Berisford BEX Ltd | Hospitality | 2018 |
| Berry Care Health Limited | Health & social care | 2022 |
| Berryhall Associates Ltd | Professional & scientific | 2003 |
| Bertos Nunthorpe Food NE Ltd | Hospitality | 2025 |
| Bertosnunthorpe Ltd | Hospitality | 2025 |
| Bertschi U.K. Limited | Transport & logistics | 1989 |
| Berwick Hills Phone and Retail Limited | Wholesale & retail | 2025 |
| Berwick Hills Practice Limited | Health & social care | 2023 |
| Beso Painters Ltd | Construction | 2023 |
| Bespoke Access Ltd | Construction | 2019 |
| Bespoke Boux Ltd | Wholesale & retail | 2025 |
| Bespoke Camping Solutions Ltd | Hospitality | 2023 |
| Bespoke Concrete Specialists Ltd | Construction | 2018 |
| Bespoke ES Ltd | Construction | 2025 |
| Bespoke Financial Group Limited | Financial services | 2014 |
| Bespoke Financial Health Limited | Financial services | 2019 |
| Bespoke Home Renovations Ltd | Construction | 2021 |
| Bespoke Joinery Guisborough Limited | Manufacturing | 2023 |
| Bespoke Life Limited | Financial services | 2024 |
| Bespoke Maternity Care Limited | Other services | 2015 |
| Bespoke Timber Creations (NE) Ltd | Construction | 2021 |
| Bespoke Tyre & Autocare Ltd | Wholesale & retail | 2015 |
| Bespoke-Homes-Uk Limited | Construction | 2019 |
| Best Britain Limited | Wholesale & retail | 2024 |
| Best Buy Fisheries and Pizza Ltd | Hospitality | 2025 |
| Best Buy Properties Limited | Real estate | 2020 |
| Best Buy UK Ltd | Wholesale & retail | 2015 |
| Best Choice NE Ltd | Wholesale & retail | 2012 |
| Best Cooling Solution Ltd | Manufacturing | 2022 |
| Best Hand Carwash A1 Ltd | Other services | 2025 |
| Best Laundry Services Limited | Extraterritorial | 2019 |
| Best Range Ltd | Wholesale & retail | 2024 |
| Best Utility Switch Ltd | Construction | 2026 |
| Best Vibes Ltd | Hospitality | 2025 |
| Bestbros Ltd | Wholesale & retail | 2025 |
| Bestbuy 24/7 Ltd | Wholesale & retail | 2021 |
| Bestmark Properties (AS) Limited | Real estate | 2021 |
| Bestmark Properties (SB) Limited | Real estate | 2021 |
| Bestmark Properties (SP) Limited | Real estate | 2021 |
| Bestmark Properties Limited | Construction | 2000 |
| Betailored Ltd | Wholesale & retail | 2025 |
| Beth Haven Properties Ltd | Construction | 2017 |
| Better 360 Ltd | Information & communication | 2025 |
| Better Brand Agency Limited | Professional & scientific | 2008 |
| Better Cattle Company Ltd | Agriculture & fishing | 2019 |
| Bettson Properties Limited | Real estate | 2026 |
| Bevington P Limited | Wholesale & retail | 2016 |
| Beyond Visuals Ltd | Information & communication | 2023 |
| Bgacces Ltd | Construction | 2026 |
| BGS Inspection Services Ltd | Other services | 2018 |
| Bhbaqb Limited | Other services | 2021 |
| Bheshajala Biosciences Ltd | Wholesale & retail | 2026 |
| Bhosale & Patil Corporation Ltd | Wholesale & retail | 2024 |
| BID Buddy Pro Ltd | Information & communication | 2026 |
| Bier & Beer Ltd | Hospitality | 2018 |
| Big Aido Properties Ltd | Households | 2024 |
| Big Baps North Ormesby Ltd | Hospitality | 2026 |
| Big Bite Creative Ltd | Information & communication | 2011 |
| Big Fish Little Fish Limited | Administrative & support | 2001 |
| Biggysmallz Corporate Hospitality Ltd | Other services | 2022 |
| Bigmac Consultancy Ltd | Construction | 2023 |
| Biju Northallerton Limited | Other services | 2017 |
| Bike Base North York Moors Limited | Administrative & support | 2024 |
| Bilal Ahmad LY Ltd | Wholesale & retail | 2025 |
| Billie Tyler's General Dealers Ltd | Wholesale & retail | 2024 |
| Billie Tyler's Property Rentals Ltd | Real estate | 2021 |
| Billie Tyler's TAN 'N' GLO Ltd | Other services | 2024 |
| Billie Tyler's Wines & Beers Ltd | Wholesale & retail | 2020 |
| Billionaires Squad A.I Academy Ltd | Information & communication | 2025 |
| BIN Khalid Group Ltd | Wholesale & retail | 2025 |
| Binding Solutions Ltd | Mining & quarrying | 2016 |
| Binks Landscape Maintenance and Construction Ltd | Administrative & support | 2001 |
| Binks Landscapes Limited | Administrative & support | 2001 |
| Binks Nurseries Limited | Agriculture & fishing | 2001 |
| BIO Gear UK Limited | Wholesale & retail | 2020 |
| Bioforce N.E Ltd | Manufacturing | 2014 |
| Bioguard Biotech Ltd | Manufacturing | 2025 |
| Biopower (Hartlepool) Holdings Limited | Financial services | 2017 |
| Biopower Operations Limited | Professional & scientific | 2025 |
| Biped Limited | Health & social care | 2017 |
| Birch Electrical Services and Technologies Limited | Professional & scientific | 2015 |
| Birdcage 21 Ltd | Hospitality | 2024 |
| Biryani and Chaii Ltd | Hospitality | 2026 |
| Biscuit Brands Ltd | Hospitality | 2023 |
| Bishopton Property Development Ltd | Construction | 2017 |
| Bizedge Consulting Ltd | Professional & scientific | 2025 |
| Bizify Ltd | Extraterritorial | 2015 |
| Bjay Sierra Ltd | Health & social care | 2019 |
| BJD26 Holdings Ltd | Hospitality | 2026 |
| BK Barbers 2026 Ltd | Other services | 2026 |
| BK Rigging Ltd | Construction | 2024 |