| Barrowbridge Construction Limited | Construction | 2008 |
| Barrowbridge Developments Ltd | Construction | 2025 |
| Bartletts (Whalley) Ltd | Education | 2025 |
| Bashall Barn Limited | Wholesale & retail | 1999 |
| BC Marlston Limited | Real estate | 2018 |
| BD Whalley Ltd | Manufacturing | 2024 |
| BE Heard Advocacy Ltd | Health & social care | 2024 |
| Beach Daze Holiday Lets Limited | Real estate | 2024 |
| Beaconberg Ltd | Information & communication | 2012 |
| Beauregard Jewellery Ltd | Manufacturing | 2022 |
| BEC & Co Whalley Ltd | Other services | 2024 |
| Beck Developments Limited | Construction | 1996 |
| Bedford Wealth Ltd | Financial services | 2020 |
| Bedshaped Ventures Ltd | Hospitality | 2025 |
| Beez Private Hire Ltd | Transport & logistics | 2025 |
| BEK Enviro Limited | Professional & scientific | 2014 |
| Beks Pets Ltd | Other services | 2013 |
| Bella Pizza Events Ltd | Hospitality | 2024 |
| BEN Scott Contracting Ltd | Administrative & support | 2023 |
| Benjamin Thornber and Sons Ltd | Wholesale & retail | 2014 |
| Bennett Kirkhope Smith Ltd | Professional & scientific | 2015 |
| Bennetts Close Property Management Company Limited | Households | 2016 |
| Bentley Monaco Limited | Arts & recreation | 2025 |
| Bert’S Cardhouse Ltd | Wholesale & retail | 2026 |
| Better Beds Limited | Wholesale & retail | 2012 |
| Beyond the Valley Brewing Co Ltd | Manufacturing | 2024 |
| Big Bear's BBQ Limited | Hospitality | 2019 |
| Big Bear's Pizza Limited | Hospitality | 2025 |
| Big Hits Digital Media Limited | Professional & scientific | 2021 |
| Bigger Solutions Limited | Real estate | 2024 |
| Biosilico Limited | Information & communication | 2012 |
| Birch Accounting Solutions Limited | Extraterritorial | 2022 |
| Birkley Cook Developments Ltd | Real estate | 2023 |
| Bkrs Properties Ltd | Real estate | 2026 |
| BKS SSB Ltd | Financial services | 2022 |
| Blabberfusion Limited | Professional & scientific | 2024 |
| Black Sheep PUB Company Ltd | Hospitality | 2018 |
| Blackburn and Darwen Property Investments Ltd | Real estate | 2025 |
| Blackburn Beef Company Limited | Wholesale & retail | 1991 |
| Blackburn Incorporated Law Association(The) | Other services | 1882 |
| Blades Developments (NW) Limited | Construction | 2014 |
| Blakewedge Limited | Manufacturing | 1981 |
| Blended North Ltd | Other services | 2024 |
| Bloomingtails Ltd | Other services | 2023 |
| Blue Cherry Coffee Company Ltd | Manufacturing | 2023 |
| Blue Ocean Bidco 2 Limited | Health & social care | 2018 |
| Blue Sky 51 Ltd | Professional & scientific | 2025 |
| Blueberries Cafe Limited | Hospitality | 2009 |
| BLUEBUBBLE123 Limited | Manufacturing | 2012 |
| BMR Building Maintenance Repairs Limited | Construction | 2013 |
| Bnpm IT Consultancy Limited | Information & communication | 2013 |
| Boaco Ltd | Construction | 2024 |
| Boardroom Socials Ltd | Information & communication | 2026 |
| Boars Tooth Ltd | Professional & scientific | 2018 |
| Boiler Technical Services Limited | Construction | 2000 |
| Boldsworth (Holdings) Limited | Real estate | 1944 |
| Bolland Estate Management Limited | Professional & scientific | 2025 |
| Bolland UK Group Holdings Limited | Financial services | 2025 |
| Bolton by Bowland Cricket Club | Arts & recreation | 2012 |
| Bolton Hall Sporting Club Limited | Arts & recreation | 2025 |
| Bond & LI Property Ltd | Real estate | 2021 |
| Bonnie Swim Ltd | Wholesale & retail | 2025 |
| Borders Fallen Stock Ltd | Water & waste | 2022 |
| Borough Printing Company,Limited(The) | Wholesale & retail | 1921 |
| Bottcher Airedale Limited | Manufacturing | 1988 |
| Bottcher U.K. Limited | Manufacturing | 1973 |
| Boutique Homes Ltd | Real estate | 2023 |
| Bowbearer's Ltd | Hospitality | 2017 |
| Bowker Haulage Limited | Transport & logistics | 2018 |
| Bowland Bikes C.I.C. | Arts & recreation | 2022 |
| Bowland Cleaning Company Limited | Administrative & support | 2025 |
| Bowland Concierge Services Ltd | Administrative & support | 2025 |
| Bowland Distillery Ltd | Manufacturing | 2017 |
| Bowland Ecology Limited | Professional & scientific | 2005 |
| Bowland Enterprises Limited | Financial services | 2014 |
| Bowland Estate Services Ltd | Administrative & support | 2026 |
| Bowland Fabrications Ltd | Manufacturing | 2014 |
| Bowland Fitness Ltd | Arts & recreation | 2025 |
| Bowland Food Hall Limited | Wholesale & retail | 2017 |
| Bowland Health Ltd | Health & social care | 2018 |
| Bowland Inns & Hotels Limited | Real estate | 1997 |
| Bowland Preschool Limited | Health & social care | 2017 |
| Bowland Retreat Lodges Ltd | Hospitality | 2019 |
| Bowland Speciality Foods Limited | Hospitality | 2016 |
| Bowland Vets Limited | Professional & scientific | 2022 |
| Bradley Court Thornley Limited | Households | 1992 |
| Bradley Park Ltd | Real estate | 2022 |
| Brainstorm Holdings Ltd | Financial services | 2023 |
| Brainstorm Ltd | Wholesale & retail | 1995 |
| Bramble Accounting Solutions Limited | Professional & scientific | 2020 |
| Bramley Meade Coach House Limited | Health & social care | 1994 |
| Branleigh Holdings (Lowergate) Ltd | Financial services | 2023 |
| Branleigh Holdings Ltd | Financial services | 2020 |
| Branleigh Homes (Pendle Waters) Ltd | Construction | 2024 |
| Branleigh Homes (ST Marys) Ltd | Construction | 2021 |
| Branleigh Homes Ltd | Construction | 2018 |
| Branton East Side Limited | Agriculture & fishing | 2023 |
| Bravehearted Limited | Professional & scientific | 2024 |
| Breads & Dough Ltd | Manufacturing | 2026 |
| Breakell Engineering Limited | Professional & scientific | 2014 |