| Bristol Owners Parts Supply Ltd | Professional & scientific | 2020 |
| Britalia (Preston) Limited | Hospitality | 2025 |
| Britec Engineering Ltd | Administrative & support | 2018 |
| Britform Distributions Limited | Wholesale & retail | 2026 |
| British Beef Company Limited | Manufacturing | 1995 |
| British Commercial Vehicle Museum Trust | Education | 1990 |
| British Institute of Professional Photography | Other services | 1921 |
| Britwell Innovations Ltd | Wholesale & retail | 2026 |
| Broad Cove Limited | Other services | 2013 |
| Broadcast Sound Systems Holding Limited | Professional & scientific | 2012 |
| Broadcast Sound Systems Ltd. | Construction | 1995 |
| Broadway General Limited | Wholesale & retail | 2009 |
| Brock River Ltd | Professional & scientific | 2019 |
| Brockhall Holdings Limited | Financial services | 2021 |
| Brockhall Village Limited | Real estate | 1960 |
| Brockholes Arms Auction Mart,Limited | Wholesale & retail | 1927 |
| Brockholes Homes Limited | Real estate | 2012 |
| Brockliss Limited | Health & social care | 2022 |
| Brockside Inns Limited | Hospitality | 2025 |
| Broker Consulting Limited | Financial services | 2015 |
| Brolly Caddy Ltd | Manufacturing | 2026 |
| Bronz Ninja Holdings Ltd | Financial services | 2025 |
| Bronz Properties Ltd | Financial services | 2023 |
| Brook Denture Clinic Limited | Extraterritorial | 2013 |
| Brook Jackson Consulting Ltd | Information & communication | 2025 |
| Brook View Developments Limited | Construction | 2016 |
| Brookdale Close Management Company Limited | Households | 2025 |
| Brookfield Cuts Ltd | Other services | 2026 |
| Brookfield Equestrian Centre Limited | Agriculture & fishing | 2012 |
| Brookfield Retrofit Limited | Construction | 2023 |
| Brookland Shoes Ltd | Wholesale & retail | 2013 |
| Brooks Gardencare and Services Limited | Administrative & support | 2006 |
| Broomes Holdings Limited | Financial services | 2022 |
| Broomfields Farm Road Ltd | Households | 2018 |
| Brotay Developments Limited | Construction | 2020 |
| Brotay Estates Limited | Real estate | 2024 |
| Brother Consulting Ltd | Information & communication | 2026 |
| Brother Machine Tools Sales Ltd | Wholesale & retail | 2026 |
| Brotherhood Club Ltd | Wholesale & retail | 2025 |
| Brothers Machine Tools Limited | Manufacturing | 2020 |
| Brough Construction Limited | Wholesale & retail | 1997 |
| Broughdale Investments Ltd | Real estate | 2026 |
| Broughton Brickwork Limited | Professional & scientific | 2012 |
| Broughton Building Company Ltd | Construction | 2024 |
| Broughton Consultants Limited | Professional & scientific | 2022 |
| Broughton Logic Limited | Information & communication | 2011 |
| Broughton Padel (Preston) Limited | Arts & recreation | 2025 |
| Broughton Pre-School (Preston) | Education | 2003 |
| Broughton Roofing Ltd | Construction | 2023 |
| Broughton Security Alarms Ltd | Administrative & support | 2004 |
| Broughton Services Limited | Construction | 2026 |
| Broughton Trading Limited | Real estate | 2009 |
| Browett Roofing Co. Ltd | Construction | 2025 |
| Brown Eagle Building Limited | Construction | 2021 |
| Brown Glass Ltd | Health & social care | 2020 |
| Brown Sugar Preston Limited | Hospitality | 2023 |
| Brownhat Limited | Professional & scientific | 2020 |
| Browns Auto Electrical Limited | Wholesale & retail | 2012 |
| Browns Autocare Ltd | Wholesale & retail | 2020 |
| Browrigg (2021) Ltd. | Wholesale & retail | 2020 |
| Browrigg Limited | Real estate | 2018 |
| Browse Box Ltd | Wholesale & retail | 2023 |
| Brtsh E Store Limited | Wholesale & retail | 2022 |
| Bruccianis Limited | Hospitality | 2023 |
| Bruce ENT Limited | Health & social care | 2017 |
| Bruna Hill Management Company Ltd | Households | 2024 |
| Brunchify Ltd | Hospitality | 2024 |
| Brunchin Ltd | Hospitality | 2025 |
| Bruton Street (Management) Ltd | Real estate | 2008 |
| BRW Access Ltd | Construction | 2021 |
| Brwla Limited | Wholesale & retail | 2025 |
| Bryan's Salads Ltd. | Agriculture & fishing | 2000 |
| Bryn Bedd Limited | Agriculture & fishing | 2018 |
| Brytec Limited | Professional & scientific | 1994 |
| BS & LD Enterprise Ltd | Education | 2020 |
| BS Technovations Ltd | Information & communication | 2024 |
| BSJ Community Hall Ltd | Real estate | 2025 |
| BSL INT Ltd | Wholesale & retail | 2025 |
| Bslh Company Limited | Wholesale & retail | 2025 |
| BSM Assessors Ltd | Professional & scientific | 2023 |
| Bspw (Holdings) Limited | Financial services | 2019 |
| Bspw (Holdngs) Limited | Financial services | 2019 |
| Bspw Limited | Professional & scientific | 2003 |
| Bstainless Ltd | Wholesale & retail | 2023 |
| BT Capital Partners Limited | Information & communication | 2025 |
| BTC 4 U Ltd | Information & communication | 2021 |
| BTC Broker Limited | Information & communication | 2021 |
| BTC for YOU Limited | Information & communication | 2021 |
| BTC Networking Ltd | Information & communication | 2021 |
| BTD Studios Ltd | Professional & scientific | 2024 |
| BTM Consulting Limited | Professional & scientific | 2023 |
| Bubbles and Boba Preston Ltd | Hospitality | 2023 |
| Buca Enterprise Ltd | Construction | 2022 |
| Buck's Army Limited | Arts & recreation | 2018 |
| Bucket and Spade Media Limited | Professional & scientific | 2018 |
| Buckford LLP | | 2011 |
| Buckingham Entity Limited | Real estate | 2018 |
| Buckingham House Management Limited | Households | 2021 |
| Bucks & Co INT. Limited | Manufacturing | 2016 |
| Buckshaw Court Management Company Limited | Real estate | 2003 |