| B & G Sears (Holdings) Limited | Construction | 2004 |
| B & G Sears Limited | Construction | 2001 |
| B & W Plant Group Ltd | Administrative & support | 2003 |
| B & W Plant Hire and Sales Limited | Wholesale & retail | 2000 |
| B and M Properties Limited | Real estate | 1972 |
| B B B Printing Limited | Professional & scientific | 2011 |
| B B Barbers (NW) Ltd | Other services | 2024 |
| B Eckersley Limited | Construction | 2008 |
| B M S Critical Care Limited | Wholesale & retail | 1984 |
| B R B Logistics Northwest Limited | Transport & logistics | 2026 |
| B Roberts Plumbing and Heating Limited | Construction | 2020 |
| B&B Trading Group Limited | Manufacturing | 2015 |
| B&C Portfolio Ltd | Real estate | 2025 |
| B&W Plant Sales Limited | Administrative & support | 2022 |
| B'S Burgers & Shakes Ltd | Hospitality | 2021 |
| B'S Hand Car Wash (Blackburn) Ltd | Administrative & support | 2022 |
| B-Spoke Touch Ltd | Manufacturing | 2024 |
| B. & M. Longworth (Edgworth) Limited | Manufacturing | 1976 |
| B. C-N. Auto Refinishing Suppliers Limited | Wholesale & retail | 1980 |
| B.B Painting & Decoration Ltd | Construction | 2020 |
| B109 Ltd | Professional & scientific | 2022 |
| B2B Solutions Hub Ltd | Other services | 2025 |
| B2V2 Limited | Administrative & support | 2025 |
| BA (Blackburn) Constructions Ltd | Construction | 2021 |
| BA Polymer Limited | Manufacturing | 2017 |
| BA Smile Ltd | Health & social care | 2022 |
| Baaz Bargains Ltd | Wholesale & retail | 2025 |
| Baaz Brothers Ltd | Real estate | 2019 |
| Babra’S Beauty Salon Ltd | Other services | 2023 |
| Babylon Holiday Properties Ltd | Real estate | 2025 |
| Back Oak Ltd | Information & communication | 2019 |
| Backed Buy Limited | Wholesale & retail | 2025 |
| Backes CIC | Other services | 2023 |
| Bacup Healthcare Limited | Wholesale & retail | 2023 |
| Bags of Beans Limited | Manufacturing | 2007 |
| Baig Sahab Limited | Wholesale & retail | 2025 |
| Bailey Legal Services Limited | Professional & scientific | 2010 |
| Bakayoko Ltd | Wholesale & retail | 2022 |
| Baker & Coleman Holdings Ltd | Financial services | 2023 |
| Baker & Coleman Solicitors Limited | Professional & scientific | 2014 |
| Balaaj Limited | Wholesale & retail | 2024 |
| Balance Medical Services Limited | Professional & scientific | 2022 |
| Balotech Solutions Ltd | Information & communication | 2025 |
| Bamboo Beauty Limited | Other services | 2009 |
| Bandala Autotraders Ltd | Wholesale & retail | 2020 |
| Bandesha.Brothers Limited | Wholesale & retail | 2024 |
| Bangor Street Cafe Ltd | Hospitality | 2025 |
| Bangor Street Limited | Real estate | 2015 |
| Bank View Solicitors Limited | Professional & scientific | 2017 |
| Banos 1 Ltd | Information & communication | 2021 |
| Bar Fiftynine Ltd | Hospitality | 2022 |
| Bar-Gin-Box Ltd | Hospitality | 2020 |
| Baraka HQS Limited | Real estate | 2024 |
| Baraka Textiles Limited | Extraterritorial | 1999 |
| Barakah Transport Ltd | Transport & logistics | 2022 |
| Barakat Transportation Ltd | Transport & logistics | 2025 |
| Barber 48 Limited | Other services | 2025 |
| Barberolli Limited | Other services | 2003 |
| Barclay Properties NW Limited | Real estate | 2012 |
| Bareskn Ltd | Health & social care | 2026 |
| Barfia Northwest Limited | Wholesale & retail | 2022 |
| Bargain Basket Ltd | Wholesale & retail | 2024 |
| Bargaindriveuk Ltd | Wholesale & retail | 2024 |
| Barika Ltd | Other services | 2017 |
| Barita Limited | Real estate | 2009 |
| Bark & Purr Pet Foods Limited | Manufacturing | 2024 |
| Bark Boss Limited | Other services | 2024 |
| Barkah Trading Ltd | Wholesale & retail | 2026 |
| Barkat Food Store Blackburn Limited | Wholesale & retail | 2013 |
| Barkat International Ltd | Wholesale & retail | 2018 |
| Barkat Properties Ltd | Real estate | 2022 |
| Barkat Services Ltd | Professional & scientific | 2026 |
| Barker Supplies Ltd | Wholesale & retail | 2020 |
| Barley Holdings Limited | Construction | 2015 |
| Barlowfold Investments Holdings Ltd | Financial services | 2019 |
| Barmy Education Limited | Extraterritorial | 2017 |
| Barnes DH Developments Limited | Real estate | 2021 |
| Barnes Mechanical Engineering Ltd | Construction | 2013 |
| Barnold Limited | Other services | 2016 |
| Baron Fleet Technologies Ltd | Professional & scientific | 2017 |
| Baroneco Limited | Wholesale & retail | 2025 |
| Barrow Brook Properties Ltd | Construction | 2018 |
| Barsby Projects Limited | Construction | 2021 |
| Bart-N-Sons Civil Engineering Ltd | Construction | 2024 |
| Bartina Limited | Hospitality | 2007 |
| Bartizan Bar Solutions (UK) Ltd | Other services | 2013 |
| Barton Contractors (NW) Ltd | Construction | 2008 |
| Barton Environmental Ltd | Professional & scientific | 2022 |
| Barton Holmes Property Ltd | Real estate | 2025 |
| Basement Waterproofing Solutions Ltd | Construction | 2018 |
| Bashford Twins Company Ltd | Information & communication | 2009 |
| Basingstoke Buildingworks Ltd | Construction | 2018 |
| Bassa Holdings Ltd | Financial services | 2026 |
| BAT 3 Limited | Extraterritorial | 2017 |
| Bathroom Nation Ltd | Wholesale & retail | 2021 |
| BAU Legal Ltd | Professional & scientific | 2019 |
| BAV Specialist Systems Ltd | Information & communication | 2010 |
| Bavin UK Ltd | Wholesale & retail | 2020 |
| Baxter (Opco) Limited | Hospitality | 2015 |
| Baxton Trading UK Ltd | Wholesale & retail | 2024 |