| Bentley Bees Ltd | Hospitality | 2025 |
| Bentley's Yorkshire Breweries (1828) Limited | Manufacturing | 2014 |
| Berenguer Locksmith & Security Ltd | Administrative & support | 2025 |
| Berkley Club Limited | Hospitality | 2019 |
| Berry & Gail Ltd | Wholesale & retail | 2011 |
| Bert Leach Transport Limited | Transport & logistics | 1964 |
| Best Destinations Ltd | Administrative & support | 2017 |
| Best Hand Car NW Wash Ltd | Administrative & support | 2025 |
| Best Hand Car Wash (Blackburn) Limited | | 2015 |
| Beta Takeaway Ltd | Hospitality | 2025 |
| Bezzo Technology Limited | Wholesale & retail | 2024 |
| BFH Services Ltd | Construction | 2025 |
| BG Pubs & Events Limited | Hospitality | 2022 |
| Bhatti Brothers (NW) Ltd | Wholesale & retail | 2024 |
| Big Wave Homes Limited | Real estate | 2020 |
| Bigpapas Ltd | Hospitality | 2018 |
| Bila N Tela Limited | Information & communication | 2025 |
| Billingtons Catering Ltd | Hospitality | 2024 |
| Biopets Ltd | Manufacturing | 2017 |
| Birkenhead Eats Ltd | Hospitality | 2023 |
| Birr Care Limited | Health & social care | 2026 |
| Birtwell & Co.Limited | Manufacturing | 1960 |
| BKS Management Limited | Professional & scientific | 2025 |
| Black Dial.Co Ltd | Other services | 2026 |
| Black Dog Boxing Ltd | Administrative & support | 2019 |
| Black Dog Golf Ltd | Administrative & support | 2019 |
| Black Dog MC Ltd | Health & social care | 2024 |
| Black Dog MC Support CIC | Health & social care | 2025 |
| Black Dog Mind Club Ltd | Health & social care | 2023 |
| Black Dog MMA Ltd | Administrative & support | 2019 |
| Black Dog Oswaldtwistle Ltd | Hospitality | 2022 |
| Black Dog Sports Ltd | Administrative & support | 2019 |
| Blackburn Road Learning Centre Ltd | Education | 2018 |
| Blackburn Road PO Ltd | Wholesale & retail | 2024 |
| Blacksheep Leisure Group Ltd | Hospitality | 2018 |
| Blades Building Maintenance Ltd | Construction | 2014 |
| Bladesrentals Ltd | Construction | 2025 |
| Blakes Hearing Care Ltd | Wholesale & retail | 2021 |
| Blenkinsopp Estate Limited | Real estate | 2024 |
| Bloom Bar & Lounge Limited | Hospitality | 2025 |
| Blue Baron Limited | Information & communication | 2012 |
| Blue World Ltd | Transport & logistics | 2025 |
| Blueoceanassoc. Ltd | Information & communication | 2019 |
| Bluestone Credit Hire Ltd | Administrative & support | 2025 |
| Bluestone Vehicle Hire Ltd | Wholesale & retail | 2014 |
| BMP Europe Limited | Manufacturing | 1984 |
| BN Building Services Ltd | Construction | 2025 |
| BOG Construct Ltd | Wholesale & retail | 2021 |
| Bold Moves Coaching Ltd | Administrative & support | 2021 |
| Bolton Property Ventures Ltd | Real estate | 2024 |
| Boomerang Travel Limited | Transport & logistics | 2009 |
| Boost ME Therapy Ltd | Health & social care | 2024 |
| Boost UR Business Ltd | Professional & scientific | 2025 |
| Boss Movers Ltd | Transport & logistics | 2025 |
| Bossmanz Ltd | Wholesale & retail | 2025 |
| BOT Digital Solutions Ltd | Information & communication | 2026 |
| BP Consult Ltd | Professional & scientific | 2026 |
| BP Drylining Ltd | Construction | 2022 |
| BPS Buildings Ltd | Construction | 2025 |
| BPS Fluid Power & Automation Ltd | Wholesale & retail | 1987 |
| Bptroofing Ltd | Construction | 2022 |
| Bradley Constructions (NW) Ltd | Construction | 2022 |
| Braeside Home for the Elderly Limited | Health & social care | 2002 |
| Brainyspinach Math Ltd | Education | 2022 |
| Bramsy Ltd | Wholesale & retail | 2021 |
| Branded Buys Limited | Wholesale & retail | 2026 |
| Brands Inside OUT Limited | Professional & scientific | 2016 |
| BRANDS22 Limited | Wholesale & retail | 2019 |
| Brandwood Farm Meats Limited | Wholesale & retail | 2013 |
| Branvia Ltd | Information & communication | 2023 |
| Brava Containers Ltd | Water & waste | 2025 |
| Bravepath Limited | Wholesale & retail | 2020 |
| Bravo Tango 76 Ltd | Administrative & support | 2019 |
| Brdo Joinery Ltd | Construction | 2019 |
| Brick and Bloom Properties Ltd | Real estate | 2025 |
| Bridge Centre North West Ltd | Health & social care | 2014 |
| Bridge Centre Properties Ltd | Households | 2025 |
| Briggs Engineering Consultants Ltd | Professional & scientific | 2018 |
| Brightpath Study Group Ltd | Education | 2017 |
| Brightway Cleaning Limited | Administrative & support | 2013 |
| Brightway Exterior Services Ltd | Administrative & support | 2026 |
| Brilie Investments Limited | Professional & scientific | 2009 |
| Brilie Properties Limited | Real estate | 2005 |
| Brit Great Mart Ltd | Wholesale & retail | 2024 |
| Brittania Trade Goods Ltd | Wholesale & retail | 2025 |
| BROADBAND9 Ltd | Information & communication | 2017 |
| Broadfield Motor Company Limited | Wholesale & retail | 2016 |
| Broderick Security Ltd | Construction | 2024 |
| Bromley Hesketh Ltd | Education | 2023 |
| Bronzelle Ltd | Wholesale & retail | 2025 |
| Brookfields Investments Limited | Real estate | 2024 |
| Brookside Mill Ltd | Real estate | 2025 |
| Brothers Courier Service Ltd | Transport & logistics | 2025 |
| Browfield Farm Holdings Ltd | Financial services | 2021 |
| Brown and Hope Limited | Real estate | 2003 |
| Brown COW Ltd | Hospitality | 2026 |
| Brownholme Ltd | Real estate | 2020 |
| Bruntons Asiku Farming Ltd | Administrative & support | 2022 |
| BSB Electronic Systems Ltd | Administrative & support | 2000 |
| BSK Retail Ltd | Wholesale & retail | 2026 |