| Board and Sword Ltd | Wholesale & retail | 2024 |
| Boconsult Ltd | Professional & scientific | 2013 |
| Bohemian Artistry Limited | Other services | 2011 |
| Boiler Link Limited | Information & communication | 2024 |
| Boing Limited | Arts & recreation | 2003 |
| Bold Stores and Events CIC | Hospitality | 2024 |
| Bombay Curry House Limited | Hospitality | 2019 |
| Bombay LA1 Ltd | Hospitality | 2025 |
| Bonecare Ltd | Health & social care | 2025 |
| Bonnick Flooring Ltd | Construction | 2021 |
| Boogie Pumps (Fleet) Ltd | Education | 2019 |
| Boogie Pumps (South East London) Ltd | Arts & recreation | 2020 |
| Boogie Pumps (Woking) Limited | Arts & recreation | 2022 |
| Boom (Management) Limited | Real estate | 2023 |
| Boothfield House Caravan Park Limited | Hospitality | 2011 |
| Boots Homes and Cottages Ltd | Real estate | 2025 |
| Borders School of Dance Limited | Arts & recreation | 2024 |
| Born 2 Dance Limited | Arts & recreation | 2023 |
| Borrowdale Limited | Real estate | 2013 |
| Bouncing Cows Ice Cream Ltd | Hospitality | 2019 |
| Bowerham Kids Club | Health & social care | 2010 |
| Bowland Autotech Ltd | Wholesale & retail | 2025 |
| Bowland Equine Therapy Limited | Agriculture & fishing | 2023 |
| Bowland Hot Foods Limited | Hospitality | 2009 |
| Bowland Lakes Leisure Village Limited | Hospitality | 2018 |
| Bowland Logs Limited | Wholesale & retail | 2023 |
| Bowland Pork, Beef and Lamb Limited | Wholesale & retail | 2009 |
| Bowland Technology Limited | Professional & scientific | 2017 |
| Bowlander Holdings Ltd | Financial services | 2014 |
| Bowlander Ingredients Ltd | Wholesale & retail | 2006 |
| Bowlander Limited | Wholesale & retail | 1990 |
| Bowline Marine Engineering Ltd | Professional & scientific | 2018 |
| Bowlinggreen Padel Limited | Arts & recreation | 2025 |
| Bowo Global Foodstuffs Limited | Hospitality | 2025 |
| BPLF1 Limited | Financial services | 2014 |
| Brackens of Bowness Limited | Wholesale & retail | 2013 |
| Brad Atkinson Plumbing and Heating Limited | Construction | 2021 |
| Brad Atkinson Property Maintenance Limited | Real estate | 2021 |
| Brades Earthwise Solutions Limited | Agriculture & fishing | 2023 |
| Brades Farm Dairy Limited | Wholesale & retail | 2010 |
| Bradsha Limited | Wholesale & retail | 2025 |
| Bradshaw Holdings (NW) Ltd | Real estate | 2026 |
| Bradshaw Leasehold Ltd | Real estate | 2026 |
| Brambling Roost Limited | Hospitality | 2021 |
| Brand Connection Trading Ltd | Wholesale & retail | 2026 |
| Brand Highlighters Ltd | Information & communication | 2022 |
| Brandwoods Ltd | Wholesale & retail | 2023 |
| Brant Howe Limited | Health & social care | 2011 |
| Breck Caravan Park Ltd | Hospitality | 2018 |
| Bretherton Properties Limited | Real estate | 2017 |
| Brian Armistead Limited | Construction | 2000 |
| Brian Price and SON Ltd | Other services | 2014 |
| Brian Roberts and Associates Limited | Professional & scientific | 2023 |
| Brian Thomas Properties Ltd | Construction | 2022 |
| Bridge House (LOW Bentham) Management Company Limited | Households | 2005 |
| Bridge Square Management Company Limited | Real estate | 2023 |
| Bridges and Co Financial Advisers (Lancaster) Ltd | Financial services | 2024 |
| Bridget Street Warehouse Residents Company Limited | Households | 2006 |
| Bright and Beautiful Things Ltd | Wholesale & retail | 2022 |
| Brilliance and Fire Jewellery Ltd | Wholesale & retail | 2025 |
| Bring IT Ltd | Transport & logistics | 2018 |
| Brittany Hogarth Events Ltd | Hospitality | 2024 |
| Broadgate Caravan Park Limited | Real estate | 2025 |
| Brock Developments Limited | Construction | 2019 |
| Brock Street Barber Ltd | Other services | 2026 |
| Brock Street Bars Limited | Hospitality | 2025 |
| Brock Street Dental Practice Limited | Health & social care | 2010 |
| Brodison Consulting Limited | Health & social care | 2019 |
| Brookholme Retail Limited | Wholesale & retail | 2001 |
| Brooks' Barbers (Lancaster) Ltd | Other services | 2022 |
| Brooksy’S Barbershop Ltd | Other services | 2025 |
| Broughton House Limited | Hospitality | 2017 |
| BRS Energy Assessors Limited | Construction | 2023 |
| Brunton House Management Ltd | Households | 2012 |
| Brunton Road Residents Association (Lancaster) Limited | Administrative & support | 2004 |
| Bryan Hoggarth Limited | Manufacturing | 1999 |
| Bryce Systems Limited | Information & communication | 2026 |
| BS1 Fastfood Ltd | Hospitality | 2026 |
| Bspuffin Ltd | Wholesale & retail | 2025 |
| BTD Property Ltd | Real estate | 2024 |
| Build a Better Life Ltd | Professional & scientific | 2023 |
| Built Heritage Ltd | Professional & scientific | 2024 |
| Bumperzone Limited | Households | 1986 |
| Buoymasters (Lancaster) Limited | Households | 1987 |
| Burgshake Restaurants Ltd | Hospitality | 2020 |
| Burlon Properties Limited | Real estate | 2013 |
| Burnley Local Eats Limited | Hospitality | 2023 |
| Burrow Heights Management Limited | Households | 2008 |
| Burrow Homes Ltd | Real estate | 2018 |
| Business Directories Limited | Information & communication | 2015 |
| Business Service & Supplies (Lancaster) Limited | Administrative & support | 1962 |
| Bwplumbing Ltd | Construction | 2022 |
| Byteworld Computers Ltd | Wholesale & retail | 2025 |
| C & K Dairies Ltd | Wholesale & retail | 2023 |
| C Ferguson Decorating Ltd | Construction | 2016 |
| C J Slater Haulage Limited | Transport & logistics | 2025 |
| C Jackson Services Ltd | Financial services | 2025 |
| C P Services (Lunesdale) Limited | Construction | 2003 |
| C Swatten TM Ltd | Transport & logistics | 2024 |
| C&M Renovations Limited | Construction | 2014 |