| Bishop's Court (Aigburth) Management Limited | Households | 2002 |
| Bishopgate Limited | Financial services | 2003 |
| Bishops House Management Limited | Households | 2003 |
| Bismil UK Limited | Hospitality | 2018 |
| Bismillah Liverpool Limited | Hospitality | 2023 |
| Bispham Consultants Ltd | Administrative & support | 2025 |
| Bispham H Limited | Real estate | 2025 |
| Bisque Salon Limited | Other services | 2026 |
| Bistro 64 Limited | Hospitality | 2019 |
| Bistro Liverpool Ltd | Hospitality | 2019 |
| Bistro Noir 2020 Limited | Hospitality | 2020 |
| Bistro Popa Ltd | Hospitality | 2025 |
| Bistrotecalpl Ltd | Hospitality | 2025 |
| Bite Nutrition Ltd | Manufacturing | 2025 |
| Bitetechuk Ltd | Professional & scientific | 2025 |
| Bitfoundry Studios Ltd | Information & communication | 2024 |
| Bits Bespoke Joinery & Carpentry Specialist Ltd | Manufacturing | 2018 |
| Bitwise Web & Mobile Solutions Ltd | Information & communication | 2024 |
| Bitz Hairz Ltd | Other services | 2026 |
| Biug Consulting Ltd | Professional & scientific | 2015 |
| BIZ E-Formations Inc Ltd | Professional & scientific | 2025 |
| BIZ Loans 4U Limited | Financial services | 2016 |
| Biznaga Limited | Professional & scientific | 2017 |
| BJ (201) Limited | Other services | 2000 |
| BJ (202) Limited | Other services | 2000 |
| BJB Access Solutions Ltd | Professional & scientific | 2018 |
| BJC Wind Solutions Ltd | Manufacturing | 2021 |
| BJG Limited | Arts & recreation | 2015 |
| BJH Management Services Limited | Professional & scientific | 2012 |
| BJK Consultants Ltd | Construction | 2017 |
| BJM Electrical Ltd | Construction | 2019 |
| BJM Lettings Ltd | Real estate | 2023 |
| BJM Logistical Services Ltd | Transport & logistics | 2025 |
| BJT Motorsales Ltd | Wholesale & retail | 2025 |
| BK Accountancy Services Ltd | Professional & scientific | 2025 |
| BK Vision Ltd | Professional & scientific | 2025 |
| BK Wind Services Ltd | Professional & scientific | 2018 |
| BKA Consultants UK Limited | Professional & scientific | 2020 |
| BKJ Associates Ltd | Professional & scientific | 2025 |
| BKM Investments Ltd | Real estate | 2021 |
| Bkmm Ltd | Real estate | 2025 |
| BKN Technical Services Limited | Manufacturing | 2019 |
| BL Construction and Building Ltd | Construction | 2025 |
| Bla.C Music Group Ltd | Information & communication | 2023 |
| Black & Howard Ltd | Real estate | 2021 |
| Black Bullet Logistics Limited | Transport & logistics | 2026 |
| Black Business Founders CIC | Financial services | 2025 |
| Black CAB Taxis Liverpool Ltd | Transport & logistics | 2022 |
| Black Capital Group Ltd | Financial services | 2024 |
| Black Capital Invest Limited | Real estate | 2022 |
| Black Cats GK Ltd | Education | 2021 |
| Black Caviar Investments Limited | Real estate | 2017 |
| Black Circle NW Ltd | Professional & scientific | 2026 |
| Black Commercial Management Limited | Professional & scientific | 2016 |
| Black Consultants Ltd | Extraterritorial | 2015 |
| Black Diamond Clothing Ltd | Wholesale & retail | 2020 |
| Black Eagle Food Ltd | Hospitality | 2025 |
| Black Ember Workshop Ltd | Wholesale & retail | 2026 |
| Black Goose Interiors Ltd | Professional & scientific | 2017 |
| Black Lotus Tattoo Studio Ltd | Wholesale & retail | 2009 |
| Black Macadam Limited | Construction | 2007 |
| Black Macadam Properties Limited | Administrative & support | 2014 |
| Black Maple Coffee Limited | Hospitality | 2025 |
| Black Maple Group Ltd | Hospitality | 2025 |
| Black Maple Property Management Limited | Construction | 2025 |
| Black Market Coffee Ltd | Hospitality | 2025 |
| Black Market Pictures Ltd | Information & communication | 2022 |
| Black Media Group Limited | Professional & scientific | 2019 |
| Black Norman Solicitors Limited | Professional & scientific | 2009 |
| Black Nose Holdings Ltd | Financial services | 2026 |
| Black Panther ENT Ltd | Professional & scientific | 2024 |
| Black Panther Styling Limited | Wholesale & retail | 2024 |
| Black Rock Publishing Limited | Information & communication | 2013 |
| Black Sea 85 Ltd | Transport & logistics | 2022 |
| Black Shield Intelligence & Security Ltd | Administrative & support | 2022 |
| Black Smoke Gang Limited | Hospitality | 2024 |
| Black Spinel Limited | Wholesale & retail | 2024 |
| Black Stage Pass Limited | Information & communication | 2025 |
| Black Swan Tax Advisers Limited | Professional & scientific | 2023 |
| Black Swan Tax Limited | Financial services | 2025 |
| Black Water Marine Ltd | Construction | 2012 |
| Black Widow Design & Productions Limited | Professional & scientific | 2016 |
| Black's Estates Ltd | Real estate | 2024 |
| Blackbank Airsoft Tactical Ltd | Extraterritorial | 2013 |
| Blackberry Property Developments (NW) Ltd | Real estate | 2021 |
| Blackburn Place Equity Ltd | Construction | 2023 |
| Blackburne House | Education | 1991 |
| Blackbush Associates Ltd | Hospitality | 2018 |
| Blackbutta Limited | Real estate | 2025 |
| Blackcabsales.Com Ltd | Wholesale & retail | 2010 |
| Blackfest Ltd | Arts & recreation | 2020 |
| Blackfox Strategic Group Ltd | Wholesale & retail | 2025 |
| Blackfriars Leasing Ltd. | Extraterritorial | 1983 |
| Blackhall Tower Limited | Other services | 2019 |
| Blackhurst and Co. Ltd | Manufacturing | 2023 |
| Blackit Consulting Ltd | Information & communication | 2025 |
| Blackmore Vale Publishing Company Limited | Extraterritorial | 1987 |
| Blackout Group Limited | Administrative & support | 2018 |
| Blackout Sports Limited | Wholesale & retail | 2025 |
| Blackpearl Liverpool Ltd | Construction | 2021 |