| Bolton Symphony Orchestra Ltd | Arts & recreation | 2017 |
| Bolton Vans Ltd | Wholesale & retail | 2024 |
| Bonafide Legal Services Ltd | Administrative & support | 2019 |
| Boochtail Ltd | Wholesale & retail | 2020 |
| Booking Online Ltd | Information & communication | 2011 |
| Boombox Dance Fitness Limited | Extraterritorial | 2012 |
| Boomerang (NW) Limited | Health & social care | 2009 |
| Booth and Bear Ltd | Arts & recreation | 2026 |
| Boro Cleaning Ltd | Wholesale & retail | 2022 |
| BOS Link Limited | Administrative & support | 2018 |
| Boss Building Solutions Limited | Construction | 2019 |
| Boston Pizza Elton Limited | Hospitality | 2024 |
| Botherwire Ltd | Wholesale & retail | 2019 |
| Boundary Land Management Company Limited | Households | 1997 |
| BOW Green Farm Limited | Real estate | 2026 |
| Bowden & Bowden Ltd | Professional & scientific | 2014 |
| Bower Property Management Limited | Real estate | 2013 |
| Bowland Forest Wood Company Ltd | Manufacturing | 2025 |
| Bowland Psychological Services Ltd | Health & social care | 2011 |
| Bowman Estates Ltd | Real estate | 2023 |
| Bowman Property and Investment Ltd | Real estate | 2016 |
| Bown+ Consultants Limited | Professional & scientific | 2024 |
| Bowram Investments Ltd. | Real estate | 1998 |
| Boxed OFF Lifestyle Ltd | Hospitality | 2013 |
| Boxrooms Ltd | Health & social care | 2019 |
| Boxtree Recruitment Ltd | Administrative & support | 2015 |
| Boxwood Consulting Ltd | Extraterritorial | 2021 |
| Boyle Installations Limited | Manufacturing | 2016 |
| BP Cafe Group Ltd | Hospitality | 2025 |
| Bracken House Properties LLP | | 2006 |
| Bracken Property Company Limited | Real estate | 2021 |
| Bracken Property Group Limited | Real estate | 2023 |
| Brad Wrall Construction Limited | Construction | 2026 |
| Bradbridge Investments Limited | Extraterritorial | 2021 |
| Bradcroft Limited | Extraterritorial | 2021 |
| Bradleyphysio Bury Limited | Health & social care | 2014 |
| Braeside Interiors Limited | Construction | 2020 |
| Braeside Property Developments Ltd | Construction | 2022 |
| Braketech Automotive Limited | Wholesale & retail | 2023 |
| Brambo Trading Ltd | Wholesale & retail | 2024 |
| Brand Idol Limited | Administrative & support | 2011 |
| Branddr Ltd | Wholesale & retail | 2020 |
| Brandempwr Ltd | Information & communication | 2021 |
| Brandlesholme 99 Ltd | Hospitality | 2025 |
| BRANDS4.GROUP Limited | Professional & scientific | 2023 |
| Braniff Partnership Ltd | Information & communication | 2013 |
| Brave Soul Limited | Wholesale & retail | 2009 |
| Bravest Kids Limited | Other services | 2018 |
| Brazier Business Assistance Ltd | Professional & scientific | 2024 |
| Bread and Butter Penwortham Ltd | Hospitality | 2025 |
| Breaks Wealth Management Limited | Financial services | 2014 |
| Breeze Accounting Limited | Professional & scientific | 2009 |
| Bretherton Barns Limited | Real estate | 2003 |
| Brewbadger Limited | Extraterritorial | 2021 |
| Brewsmith Beer Limited | Manufacturing | 2014 |
| Brexwood Limited | Extraterritorial | 2020 |
| Brian Dodgson Electrical Services Ltd | Construction | 2022 |
| Brian Moores Limited | Transport & logistics | 2011 |
| Brian Pilkington Estate Agents Ltd | Real estate | 1999 |
| Brick City Boxing Limited | Arts & recreation | 2026 |
| Bricks and Motor Insurance Brokers Ltd | Financial services | 2003 |
| Bricks Holdings Limited | Financial services | 2023 |
| Bride in Mind Ltd | Other services | 2026 |
| Bridge Street News Ltd | Wholesale & retail | 2025 |
| Bridged Investments Limited | Extraterritorial | 2021 |
| Bridgeford Investments Limited | Professional & scientific | 2021 |
| Bridgemere Properties LLP | | 2006 |
| Bridgemills Holdings Ltd | Real estate | 2020 |
| Bridgingfinance.Co.Uk Ltd | Extraterritorial | 2006 |
| Briggs Demolition and Build Ltd | Wholesale & retail | 2008 |
| Bright Light Care Ltd | Health & social care | 2023 |
| Bright Light Childcare Ltd | Health & social care | 2021 |
| Bright Mountain Limited | Financial services | 2025 |
| Bright Vale Limited | Extraterritorial | 2020 |
| Brighter Blinds Limited | Wholesale & retail | 2003 |
| Brightlands Group Limited | Financial services | 2018 |
| Brightly Coloured Limited | Professional & scientific | 2023 |
| Brightside Brewing Company Limited | Manufacturing | 2009 |
| Brightview Enterprises Limited | Extraterritorial | 2020 |
| Brightview Homes Limited | Extraterritorial | 2020 |
| Brit Amber Fashion Ltd | Wholesale & retail | 2020 |
| Brit Car Rental Ltd | Administrative & support | 2026 |
| Brit Community Support CIC | Education | 2025 |
| Brit Diamond Limited | Wholesale & retail | 2025 |
| Brit Innovations Limited | Wholesale & retail | 2025 |
| Britcartify Ltd | Wholesale & retail | 2026 |
| British Association for Behavioural and Cognitive Psychotherapies | Other services | 2003 |
| British Balloon and Airship Club Limited(The) | Arts & recreation | 1966 |
| Broadwater Consulting Services Ltd | Professional & scientific | 2019 |
| Bronte Building Contractors Limited | Construction | 2023 |
| Brook Bottom Group Ltd | Hospitality | 2012 |
| Brook Bottom Ltd | Hospitality | 2022 |
| Brook Star Limited | Construction | 2021 |
| Brooke Cars M65 Limited | Wholesale & retail | 2022 |
| Brookfield Residential Care Home Limited | Health & social care | 1999 |
| Brooklands Executive Cars Limited | Transport & logistics | 2025 |
| Brooks Franchise Recruitment Limited | Administrative & support | 2017 |
| Brookwater Building Solutions Limited | Construction | 2020 |
| Brookwater Data Systems Limited | Information & communication | 2013 |
| Broom Lane Dent Limited | Health & social care | 2021 |