| BEN Dixon Training Consultancy Ltd. | Professional & scientific | 2016 |
| BEN Hoare Bell LLP | | 2005 |
| Benchmark Surveys Limited | Construction | 2018 |
| Benellis Pizza Ltd | Hospitality | 2025 |
| Bengalifusionbites Ltd | Hospitality | 2026 |
| Beni Star Pizza Ltd | Hospitality | 2026 |
| Benn Goodall Decorators Ltd | Construction | 2026 |
| Benovii Ltd | Wholesale & retail | 2026 |
| Benson Consultancy Limited | Professional & scientific | 2025 |
| Benton Retail Limited | Wholesale & retail | 2019 |
| Bergmuller Consulting Holding Ltd | Professional & scientific | 2024 |
| Berkey Water Systems Limited | Wholesale & retail | 2019 |
| Bermich Horseboxes Ltd | Wholesale & retail | 2026 |
| Berwick Food Ltd | Hospitality | 2021 |
| Besimi Group Ltd | Real estate | 2024 |
| Bespoke Interiors North East Ltd | Construction | 2025 |
| Bespoke Timberworks Ltd | Construction | 2025 |
| Bespoke Vinyl Ltd | Wholesale & retail | 2018 |
| Bespoken Bridal Ltd | Wholesale & retail | 2019 |
| Bespoq Commercial Solutions Ltd | Financial services | 2016 |
| Best Food Supplies Ltd | Wholesale & retail | 2017 |
| Best Hand Car Wash Ryhope Limited | Administrative & support | 2019 |
| Best Hand Car Wash Sunderland Ltd | Other services | 2021 |
| Best Shawarma Sunderland Limited | Hospitality | 2019 |
| Besty Two Ltd | Other services | 2025 |
| Besty's Barberz Ltd | Other services | 2024 |
| Bethanys Flowers Limited | Wholesale & retail | 2025 |
| Betpointer Ltd | Information & communication | 2025 |
| Betsy Jenny Counselling and Wellbeing Cafe C.I.C. | Health & social care | 2021 |
| Better Prospects Property Investment's Ltd | Real estate | 2024 |
| Better Together Consultancy Limited | Professional & scientific | 2025 |
| Betty Troughton Ltd | Other services | 2020 |
| Betty's Property NE Ltd | Real estate | 2022 |
| Beulah-Deetee International Limited | Manufacturing | 2024 |
| Beviks Ltd | Information & communication | 2025 |
| Beyond the Lens Limited | Information & communication | 2017 |
| BH Hotel Sunderland Ltd | Hospitality | 2026 |
| BH Sandhu Ltd | Wholesale & retail | 2025 |
| BH Travel Group Limited | Administrative & support | 2024 |
| Bhead Bistro Limited | Hospitality | 2026 |
| BHH Cladding Ltd | Construction | 2022 |
| Bhoova Limited | Professional & scientific | 2025 |
| BIA Sports Group Holdings Ltd | Arts & recreation | 2025 |
| Biancos E and E Ltd | Hospitality | 2023 |
| Bibimbopbow Ltd | Hospitality | 2023 |
| BIC Telecom Limited | Information & communication | 2024 |
| Bidem Afriventure Limited | Wholesale & retail | 2024 |
| Bidfortune Property Management Limited | Households | 1983 |
| Big Bean Catering Equipment Ltd | Manufacturing | 2026 |
| Big P'S Leisure Limited | Hospitality | 2025 |
| Big Science Entertainment UK Limited | Other services | 2019 |
| Big Solar Ltd | Extraterritorial | 2013 |
| Bigshow Integrated Logistics Ltd | Wholesale & retail | 2026 |
| Bikram Sidhu Logistics Ltd | Transport & logistics | 2025 |
| Bill Ross Construction Ltd | Construction | 2014 |
| Billy's Golden Fish & Chips Limited | Hospitality | 2006 |
| Billyd Exclusive Ltd | Wholesale & retail | 2023 |
| Bims Unisex Salon Ltd | Other services | 2025 |
| Binbarl Technical Services Ltd | Construction | 2023 |
| Binding Autism Consultancy Ltd | Health & social care | 2026 |
| BIO Blaster Limited | Manufacturing | 2020 |
| Biokinetic Labs Limited | Manufacturing | 2026 |
| Bishop Wilkinson Catholic Education Trust | Education | 2011 |
| Bishop Wilkinson Commercial Services Limited | Education | 2021 |
| Bishopwearmouth Co-Operative Community Interest Company | Agriculture & fishing | 2010 |
| Bitofbullydarts Ltd | Construction | 2023 |
| BJ. Brain Tech Solutions Ltd | Other services | 2022 |
| BJL Property Services Ltd | Real estate | 2016 |
| BK Joinery Ltd | Construction | 2020 |
| BKW Screeding Ltd | Construction | 2021 |
| Black Spell Limited | Wholesale & retail | 2020 |
| Black Swan Tattoo Studio Ltd | Other services | 2024 |
| Black Trowel Limited | Construction | 2023 |
| Blackdene Limited | Real estate | 2015 |
| Blackdiamondsweep Ltd | Administrative & support | 2026 |
| Blacksmith Links Ltd | Professional & scientific | 2023 |
| Blacksmith Property Limited | Real estate | 2017 |
| Blacksmith Real Estate Ltd | Real estate | 2024 |
| Blade Access Services Ltd | Manufacturing | 2018 |
| Blade Repair Renewables Ltd | Manufacturing | 2024 |
| BLADE3307 Ltd | Real estate | 2023 |
| Blakey Developments NE Limited | Construction | 2025 |
| Bleges Services Ltd | Construction | 2025 |
| Blend North East Ltd | Wholesale & retail | 2023 |
| Blessed Caring Services Limited | Health & social care | 2022 |
| Bletchley Park Consults Limited | Administrative & support | 2023 |
| Blinkit Production Ltd | Professional & scientific | 2025 |
| Bliss Nails Limited | Other services | 2003 |
| Blissful Global Services Ltd | Hospitality | 2025 |
| Blockfinity Ltd | Information & communication | 2024 |
| Blomkvist Digital Limited | Information & communication | 2019 |
| Blossom Trees Community CIC | Education | 2025 |
| Blossomest Blossom Ltd | Arts & recreation | 2024 |
| BLU Palm Limited | Professional & scientific | 2025 |
| Blue Brick Road Ltd | Wholesale & retail | 2022 |
| Blue Horizon Partners Limited | Professional & scientific | 2025 |
| Blue Lion Property Investments Ltd | Construction | 2023 |
| Blue Merit Limited | Health & social care | 2025 |
| Blue Moon Marketing Ltd | Professional & scientific | 2020 |
| Blue Pumpkin Ltd | Information & communication | 2018 |