| Basecamp Adventures Ltd | Administrative & support | 2021 |
| Baxter & Cash Properties Limited | Real estate | 2020 |
| Bay Legal UK Ltd | Professional & scientific | 2023 |
| Bay Motorhomes Limited | Wholesale & retail | 2010 |
| Bayside Construction Limited | Construction | 2019 |
| Bayside Homes and Developments Ltd | Real estate | 2025 |
| BB Retreats Ltd | Real estate | 2025 |
| BCA Property Investments Limited | Real estate | 2025 |
| Bckm Developments Ltd | Real estate | 2025 |
| BD Roofing Services NE Ltd | Construction | 2023 |
| BDF Fresh Produce Limited | Wholesale & retail | 2018 |
| BDH Investments NE Ltd | Real estate | 2023 |
| BDS Motorcycles Limited | Wholesale & retail | 2009 |
| BE Divine Beauty Limited | Other services | 2022 |
| BE Everywhere Limited | Information & communication | 2026 |
| Beaches & Cream Limited | Hospitality | 2011 |
| Beale Services Ltd | Professional & scientific | 2025 |
| Beam XR Limited | Information & communication | 2023 |
| Bear & Co Consultancy Ltd | Professional & scientific | 2022 |
| Beau Properties (NE) Ltd | Hospitality | 2023 |
| Beaumont (Putney) Limited | Extraterritorial | 1994 |
| Beauty @ Blagdon Limited | Other services | 2019 |
| Beauty Glow Aesthetics Ltd | Other services | 2023 |
| Beauty Training by BE Ltd | Other services | 2024 |
| Beautysauce Ltd. | Other services | 2013 |
| BEC Hire Ltd | Manufacturing | 2016 |
| Beemcar Group Limited | Transport & logistics | 2019 |
| Bees Bounty UK Ltd | Agriculture & fishing | 2026 |
| Beezee Savers Limited | Professional & scientific | 2024 |
| Beiwei 55 Degrees Travel Limited | Administrative & support | 2014 |
| Bell & Bucket Ltd | Construction | 2022 |
| Bell Tindle Williamson LLP | | 2005 |
| Bellister Properties Ltd | Real estate | 2021 |
| BEN Walker Catering Services Ltd | Hospitality | 2024 |
| Bennison Ceramic Tiling Contractors Limited | Construction | 1992 |
| Bespoke Building and Maintenance NE Ltd | Construction | 2024 |
| Bespoke Developments NE Limited | Construction | 2017 |
| Bespoke Electrical Solutions Limited | Construction | 2019 |
| Bespoke Lane Limited | Wholesale & retail | 2021 |
| Beverley House (North Shields) Management Company Ltd | Households | 2011 |
| Beverley House Management Company (Cullercoats) Limited | Extraterritorial | 2012 |
| Bevs Litebite Ltd | Hospitality | 2024 |
| Beyond Latitude Travel Ltd | Administrative & support | 2026 |
| Bezs Place Ltd | Wholesale & retail | 2023 |
| BH Scaffolding Ltd | Construction | 2024 |
| BHP Import Services LLP | | 2016 |
| Bilash Cullercoats Ltd | Hospitality | 2025 |
| Bingo Rental Ltd | Wholesale & retail | 2024 |
| Bird and FOX Limited | Wholesale & retail | 2023 |
| Birdsong NE Ltd | Information & communication | 2024 |
| Birkett Independent Ltd | Construction | 2025 |
| Bishopgate Developments Limited | Real estate | 2025 |
| Bishops Recycling Limited | Transport & logistics | 2015 |
| Black and White Services Ltd | Extraterritorial | 2024 |
| Black Belt Homes Ltd | Real estate | 2023 |
| Black Belt Motor Club Ltd | Wholesale & retail | 2024 |
| Black Storm PUB Company Limited | Hospitality | 2019 |
| Blade Runner Digital Limited | Information & communication | 2020 |
| Blade Runner Property Investment Limited | Real estate | 2026 |
| Blake Hopkinson Architecture + Design Limited | Professional & scientific | 2015 |
| Blanket Solutions Limited | Information & communication | 2024 |
| Blend NE Limited | Other services | 2024 |
| Blind Tiger Tattoo Limited | Arts & recreation | 2015 |
| Block PPM Consultancy Limited | Professional & scientific | 2015 |
| Blondey Mccoy Limited | Wholesale & retail | 2017 |
| Blooming Nails Spa Ltd | Other services | 2023 |
| BLU Sire Ventures Ltd | Professional & scientific | 2022 |
| BLU Sky Tax Limited | Professional & scientific | 2006 |
| Blue Box (North East) Limited | Construction | 2002 |
| Blue Box Property Investments Limited | Real estate | 2004 |
| Blue Lotus Energy Limited | Professional & scientific | 2026 |
| Blue Mental Health Education & Training Ltd. | Health & social care | 2020 |
| Blue Pigeon Ltd | Real estate | 2017 |
| Blue Sign Global Capital Limited | Administrative & support | 2019 |
| Blue Sign PR Ltd | Professional & scientific | 2017 |
| Blue Therapy Clinic Ltd | Health & social care | 2015 |
| Blyth Music & Theatre Company Limited | Arts & recreation | 2003 |
| Blyth Thai Massage Ltd | Health & social care | 2024 |
| BMR Garage Services Ltd | Wholesale & retail | 2007 |
| BOB Little & Co Limited | Financial services | 2004 |
| BOB Oliver Limited | Information & communication | 2017 |
| Bodhi Move Ltd | Arts & recreation | 2024 |
| Bodhi Retreat Ltd | Education | 2026 |
| Bodhi Sweat Ltd | Arts & recreation | 2024 |
| Body 360 North East Limited | Arts & recreation | 2017 |
| Body LAB Health & Fitness Ltd. | Arts & recreation | 2022 |
| Bohemian Leisure Limited | Wholesale & retail | 2015 |
| Boiler BEE Limited | Manufacturing | 2015 |
| Boilertech N.E Ltd | Construction | 2024 |
| Bolus Revision Limited | Education | 2026 |
| Bookworm Developments Limited | Construction | 2025 |
| Boots & Hoose Limited | Real estate | 2025 |
| Borland Hideaway Ltd | Hospitality | 2022 |
| Borthwick Productions Ltd | Information & communication | 2020 |
| Boss Boxing Promotions Ltd | Information & communication | 2024 |
| Bowers Family Properties Ltd | Real estate | 2019 |
| Bowmaker Ltd | Hospitality | 2025 |
| Bowman Restaurant Group Ltd | Hospitality | 2025 |
| BPM (North East) Limited | Households | 2019 |
| Bradmed Ltd | Health & social care | 2014 |