| Brandon Court Properties (Southport) Limited | Households | 1971 |
| Brandwall Ltd | Professional & scientific | 2026 |
| Brap Bikes Ltd | Wholesale & retail | 2016 |
| Brave One Barber Limited | Other services | 2022 |
| Bravo Engineers Limited | Manufacturing | 2022 |
| Bravos 1 Company Limited | Hospitality | 2020 |
| Brazilian Events UK Ltd | Other services | 2017 |
| Breaking Down the Walls Ltd | Health & social care | 2021 |
| Breathe ADR Ltd | Professional & scientific | 2024 |
| Breens Solicitors Ltd | Professional & scientific | 2016 |
| Breggia Commercial Ltd | Real estate | 2020 |
| Brenforth Limited | Hospitality | 2001 |
| Brentwood Court (Southport) Limited | Households | 1986 |
| Brew Developments Limited | Professional & scientific | 2025 |
| Briarswood Properties Ltd | Real estate | 2018 |
| Brick Ledger Distribution Ltd | Wholesale & retail | 2026 |
| Bricky's Van Ltd | Transport & logistics | 2025 |
| Bridgemane Investment Group Ltd | Financial services | 2014 |
| Bridgemane Surveyors Ltd | Real estate | 2023 |
| Bridgeway GAS Ltd | Hospitality | 2021 |
| Bridging Property Ltd | Financial services | 2013 |
| Bright Path Property (Holdings) Limited | Financial services | 2025 |
| Brighter Living Partnership | Health & social care | 2000 |
| Brijesh and Meera Investments Ltd | Real estate | 2026 |
| Brijesh and Meera Ltd | Health & social care | 2024 |
| Bristol Ward Limited | Construction | 2017 |
| Britannia IT Services Ltd | Information & communication | 2015 |
| Britannia Telecoms Ltd | Wholesale & retail | 2018 |
| British Destinations Ltd | Administrative & support | 2021 |
| Brix & Mortar Limited | Administrative & support | 2003 |
| Brix and Mortar Property Ltd | Real estate | 2025 |
| Brizo Renewable Support Services Ltd | Professional & scientific | 2025 |
| Brlg Holdings Limited | Professional & scientific | 2023 |
| Brlg Strategies Limited | Professional & scientific | 2023 |
| Broadcast Engineering Services Ltd | Real estate | 2019 |
| Broadley (Holdings) Limited | Real estate | 2014 |
| Broadley Developments Limited | Construction | 2003 |
| Brock Safety Services Ltd | Professional & scientific | 2020 |
| Broil King UK Ltd | Wholesale & retail | 2023 |
| Broker 76 Limited | Professional & scientific | 2006 |
| Bromley Developments (NW) Ltd | Real estate | 2018 |
| Brook View Properties Ltd | Real estate | 2017 |
| Brookash Developments Limited | Construction | 2025 |
| Brookfield Close Southport Limited | Real estate | 2022 |
| Brookland Equity Limited | Real estate | 2026 |
| Brooklawn (Much Hoole) Limited | Households | 2004 |
| Broomco (4178) Limited | Real estate | 2009 |
| Brough Butchers (Ormskirk) Limited | Wholesale & retail | 2002 |
| Brough's Butchers (Ainsdale) Limited | Wholesale & retail | 2005 |
| Brough's Butchers (Birkdale) Limited | Wholesale & retail | 2005 |
| Brough's Butchers (Formby) Limited | Wholesale & retail | 2005 |
| Broughs Butchers (KEW) Limited | Extraterritorial | 2008 |
| Brown OWL Consultancy Ltd | Administrative & support | 2025 |
| Brown Turner Ross Limited | Professional & scientific | 2010 |
| Brown's Home Designs Limited | Construction | 2009 |
| Brownes Master Class Co Ltd | Other services | 2013 |
| Brucal-Borland Ltd | Administrative & support | 2023 |
| Bruffs Farm Ltd | Real estate | 2020 |
| Bruneval Electrical and Automation Ltd | Construction | 2020 |
| Brutal Finesse Forge Ltd | Manufacturing | 2025 |
| Bryden International Limited | Wholesale & retail | 2002 |
| Bryony Supper Ltd | Information & communication | 2016 |
| Bt-Arch Limited | Professional & scientific | 2023 |
| Bubbles and Fizz Ltd. | Wholesale & retail | 2000 |
| Bucharest Store Ltd | Wholesale & retail | 2025 |
| Buck Electrical Limited | Construction | 2023 |
| Builders UK Limited | Construction | 2003 |
| Building Bridges Together Ltd | Health & social care | 2025 |
| Buildrite Ltd | Construction | 2018 |
| Buildwise Group Ltd | Construction | 2020 |
| Bull Bay Management Company Limited | Households | 2024 |
| Bullens Audit Services Ltd | Professional & scientific | 2014 |
| Bump of Churchtown Limited | Health & social care | 2016 |
| Bungalow Farm (Banks) Limited | Agriculture & fishing | 1965 |
| Burgess Cardiovascular Limited | Health & social care | 2019 |
| Buridan Network Ltd | Administrative & support | 2021 |
| Burke Developments Ltd | Construction | 2024 |
| Burlatech Ltd | Professional & scientific | 2025 |
| Burscough Fleet Services Ltd | Wholesale & retail | 2022 |
| Burscough Football Club Limited | Arts & recreation | 2000 |
| Burscough Recreation and Football Club C.I.C. | Arts & recreation | 2018 |
| Business Academy Limited | Professional & scientific | 2022 |
| Business Boost Ltd | Professional & scientific | 2014 |
| Business Measurement Ltd | Information & communication | 2006 |
| Businesswise Systems Ltd | Professional & scientific | 2014 |
| Busybodys Lingerie Limited | Wholesale & retail | 2003 |
| Buttercup Technology Ltd | Extraterritorial | 2012 |
| Butterfly Wings Home Care Ltd | Health & social care | 2024 |
| Butterworths Groundwork’S (NW) Ltd | Administrative & support | 2026 |
| Buttylicious Southport Limited | Hospitality | 2022 |
| Buying Daily Goods Limited | Wholesale & retail | 2023 |
| BY Rebecca Limited | Extraterritorial | 2014 |
| BY Ruben Limited | Wholesale & retail | 2025 |
| BY the Pines LLP | | 2021 |
| Byron Court (Southport) RTM Company Limited | Households | 2014 |
| BYS Accounting Ltd | Professional & scientific | 2013 |
| Bytez Ltd | Hospitality | 2026 |
| Bzaam Ltd | Hospitality | 2026 |
| C & D Housing Limited | Real estate | 2000 |
| C & D Vans Limited | Wholesale & retail | 2007 |