| Brickhouse Farm Holiday Cottages Ltd | Hospitality | 2013 |
| Brickreach Ltd | Construction | 2015 |
| Bricks N Mortar NW Limited | Construction | 2018 |
| Bride 2 BE Lancashire Limited | Other services | 2015 |
| Bridesmaid by JB Ltd | Wholesale & retail | 2021 |
| Bridge Expert Services Limited | Professional & scientific | 2024 |
| Bridge Homes (North West) Limited | Construction | 2017 |
| Bright Red Digital Limited | Information & communication | 2009 |
| Brightlightz Ltd | Wholesale & retail | 2014 |
| Brindle Bunker Heritage Restoration CIC | Arts & recreation | 2026 |
| Brindle Distillery Limited | Agriculture & fishing | 2017 |
| Brindle Holdings Limited | Financial services | 2017 |
| Brinscall Little Dairy Limited | Manufacturing | 2023 |
| Brinscall Project Services Limited | Professional & scientific | 2017 |
| Brisklink Logistics Ltd | Transport & logistics | 2025 |
| Bristol Active Holdings Limited | Construction | 2008 |
| Bristol Active Limited | Construction | 2007 |
| Bristol Garden Rooms Limited | Construction | 2020 |
| Brit Academy for Training Ltd | Education | 2015 |
| Briteyellow Limited | Information & communication | 2002 |
| British Tractor Pullers Association | Other services | 1987 |
| Brjf Accountants Ltd | Professional & scientific | 2020 |
| Brjr Ltd | Administrative & support | 2021 |
| BRK Enterprises Ltd | Real estate | 2017 |
| BRK Farming and Holding Nursery Ltd | Wholesale & retail | 1995 |
| BRK Nursery Limited | Wholesale & retail | 2026 |
| BRN Engineering Ltd | Manufacturing | 2021 |
| Broadoaks Country House Ltd | Hospitality | 2015 |
| Broadway Church Management Limited | Households | 2023 |
| Broadwood Assets Limited | Professional & scientific | 2013 |
| Brock Consultants Ltd | Wholesale & retail | 2018 |
| Broker Plus Limited | Financial services | 2016 |
| Brolly Associates Ltd. | Professional & scientific | 2009 |
| Bromford Social Club Limited | Arts & recreation | 2018 |
| Brookes Distribution Limited | Transport & logistics | 2021 |
| Brookhill Design & Build Limited | Construction | 2023 |
| Brooklands Motor Company Limited | Wholesale & retail | 2002 |
| Brooks & Green Lettings Limited | Construction | 2008 |
| Brooks Financial Consultancy Ltd | Financial services | 2010 |
| Brookson (5164E) Limited | Administrative & support | 2007 |
| Brosters Ltd | Other services | 2018 |
| Brown Brothers Security Limited | Financial services | 2019 |
| Brown Sugar Chorley Limited | Hospitality | 2025 |
| Browns Butchers Limited | Wholesale & retail | 2017 |
| Browns Fishbar Ltd | Hospitality | 2023 |
| Browns of Grimsargh Ltd. | Wholesale & retail | 1994 |
| BRS Fire & Security Ltd | Other services | 2010 |
| Brunhill Limited | Extraterritorial | 2010 |
| Brysdales Intralogistics Ltd | Manufacturing | 2003 |
| Brysdales Ltd | Manufacturing | 1971 |
| BS Lancaster Limited | Other services | 2016 |
| Bsf-Black Sun Flower Skateboards Ltd | Wholesale & retail | 2021 |
| BSG Bolton Ltd | Hospitality | 2017 |
| BSM Futures Limited | Financial services | 2019 |
| BSP (North West) Limited | Real estate | 2020 |
| Bsqfa Limited | Financial services | 2004 |
| BSW Consulting (Exeter) Limited | Construction | 1996 |
| Btas (UK) Limited | Education | 2002 |
| Btekb Technical Support Services Ltd | Professional & scientific | 2024 |
| Btid Events Ltd | Administrative & support | 2017 |
| BTW Joinery Construction & Landscapes Ltd | Administrative & support | 2017 |
| Bucks Building Contractors Ltd | Construction | 2014 |
| Buckshaw (Chorley) Management Limited | Administrative & support | 2009 |
| Buckshaw Accounting Ltd | Administrative & support | 2025 |
| Buckshaw Fabrications Ltd | Manufacturing | 2017 |
| Buckshaw Financial Services Limited | Financial services | 2008 |
| Buckshaw Joinery Limited | Construction | 2004 |
| Buckshaw Locksmiths Limited | Extraterritorial | 2013 |
| Buckshaw Village Cycles Limited | Extraterritorial | 2017 |
| Buffalo Ranch Grill Ltd | Hospitality | 2025 |
| Bufield Developments Limited | Real estate | 2014 |
| Bugle Inn Motor Company Limited | Wholesale & retail | 1993 |
| Build and Improve Limited | Construction | 2017 |
| Build Assets for Life Ltd | Real estate | 2022 |
| Build Seal Limited | Construction | 2025 |
| Build! Community Ventures CIC | Arts & recreation | 2025 |
| BUILD8 Ltd | Construction | 2025 |
| Builders Northwest Ltd | Construction | 2023 |
| Building Services Engineering Consultancy Ltd | Professional & scientific | 2012 |
| BUILDIT4ME Limited | Construction | 2017 |
| Buildlink Workforce Solutions Ltd | Administrative & support | 2019 |
| Buildspec Ltd | Construction | 2011 |
| Bulgarian Street Food Ltd | Hospitality | 2024 |
| Bumbieris Limited | Information & communication | 2013 |
| Bumble-Bee Creation Corner Ltd | Arts & recreation | 2026 |
| Bunce E-Commerce Limited | Wholesale & retail | 2025 |
| Bunker Digital Limited | Information & communication | 2025 |
| Bunting Associates Limited | Other services | 2017 |
| Burdham Limited | Construction | 2020 |
| Burgerbites Chorley Ltd | Hospitality | 2025 |
| Burgerish N Pizzeria Ltd | Hospitality | 2025 |
| Burgley Limited | Hospitality | 2004 |
| Burlington Motors Limited | Wholesale & retail | 2010 |
| Burnham Logistics Ltd | Transport & logistics | 2026 |
| Burnley Windows Limited | Construction | 2011 |
| Burnt Beech Limited | Wholesale & retail | 2022 |
| Burton Gardens & Gutters Ltd | Administrative & support | 2025 |
| Burton RD Brewing Co Limited | Wholesale & retail | 2015 |
| Bury Stairlifts Limited | Extraterritorial | 2016 |
| Business Attitude Limited | Professional & scientific | 2014 |