| Bang a Gong Ltd | Administrative & support | 2016 |
| Bang RAK (NE) Ltd | Real estate | 2025 |
| Bangla Bazaar (Northeast) Ltd | Wholesale & retail | 2024 |
| Bangla Bazaar NE Ltd | Wholesale & retail | 2020 |
| Bangrak Ltd | Hospitality | 2017 |
| Bank Building Property Management Ltd | Households | 1999 |
| Bank Cottage Dental Limited | Health & social care | 2016 |
| Bans Healthcare Ltd | Wholesale & retail | 2012 |
| Banshee Tattoo Ltd | Other services | 2025 |
| Bantel Investments Limited | Real estate | 1949 |
| BAO an NCL Ltd | Other services | 2026 |
| BAO Down Lincoln Ltd | Hospitality | 2024 |
| BAO Down Middlesbrough Limited | Hospitality | 2024 |
| BAO Down Newcastle Ltd | Hospitality | 2024 |
| BAO Down UK Ltd | Hospitality | 2021 |
| BAO Down Worswick Chambers Ltd | Hospitality | 2025 |
| Bapa Sitaram Limited | Hospitality | 2013 |
| Bapil Property Limited | Real estate | 2019 |
| Bapty House Investments Limited | Financial services | 2021 |
| Bar Blanc Ltd | Hospitality | 2016 |
| Bar Excellence Limited | Other services | 2022 |
| Bar Financial Services Ltd | Financial services | 2018 |
| BAR-NE13 Limited | Hospitality | 2026 |
| Baraka N.E Ltd | Hospitality | 2024 |
| Barbara Young Limited | Administrative & support | 2024 |
| Bardman Ltd | Wholesale & retail | 2024 |
| Bare Bems Ltd | Information & communication | 2026 |
| Bare Toed Dance Community Interest Company | Other services | 2009 |
| Barefoot Research and Evaluation Limited | Professional & scientific | 2011 |
| Bareforce Gear Limited | Wholesale & retail | 2026 |
| Barfoot Contruction Group Ltd | Construction | 2025 |
| Bargain Beckenham Ltd | Wholesale & retail | 2022 |
| Bargain Cheeta Ltd | Wholesale & retail | 2023 |
| Bargain Essentials 24 Limited | Wholesale & retail | 2024 |
| Barhound Ltd | Hospitality | 2013 |
| Barin Property Limited | Construction | 2024 |
| Barista Bakes Ltd | Hospitality | 2020 |
| Barker & Tait Property Ltd | Real estate | 2026 |
| Barker Properties North East Ltd | Real estate | 1997 |
| Barker&Tait Ltd | Real estate | 2025 |
| Barking & Dagenham Schools Project Limited | Other services | 2003 |
| Barkworth Dog Walking Limited | Other services | 2020 |
| Barmilo Properties Limited | Real estate | 2020 |
| Barmoor Drive and Thrive Ltd | Wholesale & retail | 2026 |
| Barn Residential Ltd | Real estate | 2026 |
| Barnard's Barbershop Ltd | Other services | 2026 |
| Barnes Consultancy Limited | Health & social care | 2018 |
| Barnes Thompson Developments Ltd | Construction | 2020 |
| Barnet Hospital Project Limited | Other services | 1998 |
| Barrack Court Limited | Professional & scientific | 1992 |
| Barrett Environmental Limited | Professional & scientific | 2005 |
| Barrier (Offshore) Engineering Limited | Manufacturing | 1982 |
| Barrington Alteration Tailoring Limited | Other services | 2014 |
| Barron Williams Limited | Administrative & support | 2017 |
| Barrow Hotel Bookings Limited | Hospitality | 2017 |
| Barrow Hotels Limited | Hospitality | 2024 |
| Barry Mclernon Estimating and Project Management Ltd | Professional & scientific | 2026 |
| Barry Watson Tiling Limited | Construction | 2017 |
| Bars Group Limited | Hospitality | 2024 |
| Bartell Holdings Limited | Hospitality | 2019 |
| Bartholomew Productions Limited | Administrative & support | 2023 |
| Bartley Hart Rafique Limited | Real estate | 2024 |
| Barton Meadows Residents Management Company Limited | Households | 2022 |
| Bartwood Limited | Other services | 1994 |
| Base Pizza NCL Ltd | Hospitality | 2025 |
| Basement Cocktails Ltd | Hospitality | 2019 |
| Baseware Solutions Ltd. | Wholesale & retail | 2018 |
| Bash Academy NE Ltd | Education | 2020 |
| Bashar Funeral Services Ltd | Health & social care | 2015 |
| BASKETMEDIA365 Limited | Information & communication | 2012 |
| Baskeys Ltd | Real estate | 2018 |
| Baskeys NE Ltd | Real estate | 2002 |
| Bassi OFF Licence Ltd | Wholesale & retail | 2020 |
| Bassi's Property Solutions Ltd | Real estate | 2021 |
| Bastion Medical Ltd | Health & social care | 2015 |
| Basu Marketing Consultancy Limited | Administrative & support | 2021 |
| Basu Retails Ltd | Wholesale & retail | 2022 |
| Batch Jesmond Ltd | Hospitality | 2020 |
| Batch Logistics Ltd | Education | 2025 |
| Bates Estates (NE) Limited | Real estate | 2023 |
| Batey Metallic Packing Company Limited | Manufacturing | 1920 |
| Bath & Tile Co (Ashington) Limited | Construction | 2011 |
| Bathrooms by Design (NE) Ltd | Wholesale & retail | 2017 |
| Bathrooms@Kingstonpark Ltd | Wholesale & retail | 2025 |
| Batley & Davies Ltd | Information & communication | 2021 |
| Baumahn Group Ltd | Professional & scientific | 2017 |
| Bautista Ltd | Health & social care | 2017 |
| Bavaria Motors Ltd | Wholesale & retail | 2023 |
| Bavent Road Freehold Company Limited | Households | 2019 |
| Bavent Road Management Company Limited | Real estate | 2016 |
| Bawona Global Ltd | Professional & scientific | 2026 |
| Baxter Games Newcastle Ltd | Information & communication | 2015 |
| Bay Court (Sunderland) Management Company Limited | Real estate | 2003 |
| Bay Recruitment Group Ltd | Administrative & support | 2020 |
| Bayleaf Education Ltd | Education | 2025 |
| Bayridge Investments Ltd | Financial services | 2024 |
| Baytun Investment Group Ltd | Real estate | 2025 |
| BAZ Northeast Properties Limited | Real estate | 2018 |
| BB Kitchens & Bedrooms Ltd | Manufacturing | 2025 |
| BB Marine Ltd | Construction | 2021 |