| Bgsrv Limited | Manufacturing | 2025 |
| BHG Computer Services Ltd | Information & communication | 2023 |
| BHN Architects Limited | Professional & scientific | 2021 |
| Bhns Technology Ltd | Information & communication | 2024 |
| Bhpower Ltd | Construction | 2023 |
| Bibby Brickwork Limited | Financial services | 2022 |
| Bick Healthcare Ltd. | Health & social care | 2016 |
| Bidco Equity Group Limited | Wholesale & retail | 2020 |
| Big APE Media International Limited | Information & communication | 2009 |
| Big Bargain Store Ltd | Wholesale & retail | 2024 |
| Big Red Events Ltd | Arts & recreation | 2017 |
| Big RIG Haulage Ltd | Transport & logistics | 2019 |
| Bigland Holdings Ltd | Professional & scientific | 2019 |
| Bike Medic Chorley Ltd | Manufacturing | 2025 |
| Bill Beaumont Textiles Ltd | Wholesale & retail | 1947 |
| Bill Mccann Limited | Agriculture & fishing | 2003 |
| Bills Pizza Ltd | Hospitality | 2024 |
| Billy Online Gifts Limited | Manufacturing | 2022 |
| BIM Monkey Limited | Information & communication | 2020 |
| BIM Trade Ltd | Professional & scientific | 2017 |
| Bim-It Ltd | Professional & scientific | 2017 |
| Binary Audio Ltd | Information & communication | 2013 |
| Bind-A-Tex Holdings Limited | Financial services | 2020 |
| Bind-A-Tex Limited | Manufacturing | 2004 |
| Bingleys of Micklethwaite Ltd | Transport & logistics | 2014 |
| Bini Traders Limited | Wholesale & retail | 2016 |
| BIO Health Hub Limited | Health & social care | 2023 |
| Birchwood Langham Limited | Information & communication | 2017 |
| Bird Box Bonds PLC | Financial services | 2018 |
| Birdbrooke Entertainment Ltd | Arts & recreation | 2019 |
| Birkacre Design Services Limited | Administrative & support | 2022 |
| Birkacre Logistics Limited | Wholesale & retail | 2025 |
| Birmingham Rugs Limited | Wholesale & retail | 2019 |
| Bison Strength Club Ltd | Wholesale & retail | 2025 |
| Biyd Services Ltd | Hospitality | 2023 |
| Bizvision Consulting Limited | Professional & scientific | 2023 |
| Bizzi Growin UP! Ltd | Wholesale & retail | 2018 |
| Bjmg Holdings Ltd | Financial services | 2026 |
| BJS Construction Ltd | Construction | 2023 |
| BK Houst Ltd | Real estate | 2022 |
| BK Houst Properties Ltd | Real estate | 2025 |
| BK Properties Chorley Ltd | Real estate | 2020 |
| Black Box Investments Limited | Administrative & support | 2017 |
| Black Box Security Alarm Systems Ltd | Other services | 1990 |
| Black Capital Ltd | Professional & scientific | 2013 |
| Black Cherry Recruitment Ltd | Administrative & support | 2009 |
| Black Dog BJJ Limited | Education | 2024 |
| Black Estates Limited | Real estate | 2022 |
| Black Seven Leisure Ltd | Wholesale & retail | 2023 |
| Blackburn Motor Bodies Ltd | Administrative & support | 2021 |
| Blackburn the Builder Limited | Construction | 2023 |
| Blackjackcollab Limited | Wholesale & retail | 2024 |
| Blackjak Drinks Ltd | Hospitality | 2025 |
| Blackledge Park Management Company Limited | Real estate | 2017 |
| Blacklidges Limited | Agriculture & fishing | 2022 |
| Blacklight Creative Limited | Professional & scientific | 2012 |
| Blackmores (D) Ltd | Real estate | 2008 |
| Blackpool Fish Factory Ltd | Hospitality | 2012 |
| Blackpool Model Village Limited | Administrative & support | 2012 |
| Blacksmith Freight Services Limited | Transport & logistics | 1998 |
| Blacksmith Logistics Limited | Wholesale & retail | 2006 |
| Blackthorn (Midlands) Limited | Construction | 2004 |
| Blackthorn Property Ltd | Real estate | 2022 |
| Blackwells Fencing & Landscaping Ltd | Administrative & support | 2025 |
| Blainscough Developments Limited | Construction | 2018 |
| Blair Transport Ltd | Transport & logistics | 2023 |
| Blake Car Care Ltd | Administrative & support | 2018 |
| Blake Close Management Ltd | Arts & recreation | 2019 |
| Blank Space Consultancy Ltd | Professional & scientific | 2025 |
| Bleasdale Garage Conversions Limited | Construction | 2020 |
| Bleasdale Renovations Limited | Construction | 2018 |
| Bleathwood Estates Ltd | Real estate | 2025 |
| Blenheim Drive Ltd | Real estate | 2026 |
| Bleubelle Beauty Limited | Other services | 2003 |
| Blind Tiger Gaming Limited | Arts & recreation | 2016 |
| Blind Tiger Inns Limited | Hospitality | 2016 |
| Blinds Direct Worcestershire Ltd | Manufacturing | 2022 |
| Blinkky Ltd | Professional & scientific | 2014 |
| BLM Partnership Limited | Administrative & support | 1998 |
| Block 21 Ledgard RTM Company Limited | Households | 2025 |
| Blockworx Maintenance Ltd | Real estate | 2024 |
| Bloke Barbers Chorley Ltd | Other services | 2025 |
| Bloom Hair Salon Chorley Ltd | Other services | 2023 |
| Bloompath Ltd | Professional & scientific | 2023 |
| Blossom Trading International Limited | Wholesale & retail | 2017 |
| Blue Bear Professional Engineering Services Ltd | Professional & scientific | 2026 |
| Blue Circle Consultancy Limited | Administrative & support | 2026 |
| Blue Forge Labs Ltd | Information & communication | 2025 |
| Blue Mountain Exploration Services Limited | Professional & scientific | 2024 |
| Blue Oak Recruitment Limited | Administrative & support | 2007 |
| Blue Orange Digital Ltd | Professional & scientific | 2026 |
| Blue Orange IT Ltd | Administrative & support | 2007 |
| Blue Orange Services Limited | Information & communication | 2015 |
| Blue Oval Spares Ltd | Wholesale & retail | 2022 |
| Blue Skies E V Group Ltd | Wholesale & retail | 1991 |
| Blue Sky Learning Ltd | Education | 2019 |
| Blue Sky Sealants Limited | Construction | 2017 |
| Blue Studio Interiors Limited | Professional & scientific | 2015 |
| Blue Trousers Property Limited | Real estate | 2017 |
| Bluedoor Courier Limited | Transport & logistics | 2019 |