| Axim Ltd | Administrative & support | 2025 |
| Axis Imaging Limited | Professional & scientific | 2022 |
| Axon Rentals Ltd | Transport & logistics | 2025 |
| AYA Solutions Limited | Professional & scientific | 2017 |
| Ayan and Usman Enterprises Ltd | Wholesale & retail | 2025 |
| Aybee Ltd | Real estate | 2016 |
| Ayes Marketing Limited | Professional & scientific | 2025 |
| Ayhub Ventures Ltd | Wholesale & retail | 2022 |
| AYO OLU Ltd | Hospitality | 2024 |
| Ayoayo Clothing Limited | Wholesale & retail | 2025 |
| AYR Estates Ltd | Other services | 2017 |
| AYR Real Estate Limited | Professional & scientific | 2012 |
| AYW Estates Limited | Real estate | 2021 |
| AZE Solutions Ltd | Information & communication | 2018 |
| Azzam Ltd | Wholesale & retail | 2024 |
| B & M Restaurant Ltd | Hospitality | 2020 |
| B Best Traders Ltd | Wholesale & retail | 2025 |
| B Capital Partners Limited | Financial services | 2026 |
| B Goldstein Ltd | Administrative & support | 2019 |
| B Pro Electrical Ltd | Construction | 2018 |
| B&T Limited | Wholesale & retail | 2026 |
| B&Y Cargo and Shipping Services Limited | Transport & logistics | 2022 |
| B. Dansky Ltd | Wholesale & retail | 2003 |
| B.I.P. (Holdings) Limited | Professional & scientific | 2015 |
| B.W.T.T. Limited | Education | 2017 |
| B1 Hot Desk Room Ltd | Real estate | 2023 |
| B1 Office Space Blackpool Tech Limited | Real estate | 2026 |
| B1 Office Space Liverpool Limited | Real estate | 2026 |
| B1 Office Space Ltd | Transport & logistics | 2020 |
| B1 Rochdale Ltd | Real estate | 2022 |
| B1 Tech Boardroom Limited | Real estate | 2026 |
| B1 Your Space Ace Centre Boardroom Ltd | Real estate | 2023 |
| B1 Your Space Blackburn Ltd | Real estate | 2021 |
| B1 Your Space Blackpool Ltd | Real estate | 2022 |
| B1 Your Space Blackpool Tech Limited | Real estate | 2026 |
| B1 Your Space Burnley Ltd | Real estate | 2021 |
| B1 Your Space Group First House Ltd | Real estate | 2021 |
| B1 Your Space Liverpool a Ltd | Real estate | 2021 |
| B1 Your Space Liverpool B Ltd | Real estate | 2021 |
| B1 Your Space Ltd | Real estate | 2020 |
| B1 Your Space Northlight Boardroom Limited | Real estate | 2021 |
| B10 Global Ltd | Information & communication | 2025 |
| B13 Traading Limited | Wholesale & retail | 2026 |
| B4 UHD Ltd | Professional & scientific | 2021 |
| B4UE Limited | Information & communication | 2008 |
| BA Barbers 25 Ltd | Other services | 2025 |
| BAB BBQ Ltd | Hospitality | 2025 |
| BAB Kargo Ltd | Hospitality | 2025 |
| Babaola Limited | Administrative & support | 2018 |
| Babil Dairies Limited | Hospitality | 2025 |
| Babutsa Enterprises Limited | Hospitality | 2019 |
| Bach & Tech Group Limited | Information & communication | 2019 |
| Bacon Legal Consulting Limited | Financial services | 2011 |
| Badan Estates Limited | Real estate | 2015 |
| Badatz UK Ltd | Professional & scientific | 2020 |
| Badger House Films Ltd | Professional & scientific | 2024 |
| BAE Propertys Ltd | Real estate | 2023 |
| BAF Estates Ltd | Real estate | 2022 |
| Bagir Limited | Health & social care | 2025 |
| Bahavella Croft Management Limited | Households | 2022 |
| Bahcann Ltd | Health & social care | 2021 |
| Bahmari Ltd | Health & social care | 2021 |
| Bailey & SON Properties Limited | Real estate | 2018 |
| Bailey Ventures Ltd | Health & social care | 2019 |
| Bais Malka HS Ltd | Education | 2025 |
| Bake ME Later Ltd | Hospitality | 2026 |
| Baker Chase (1) Limited | Administrative & support | 2013 |
| Baker Chase LLP | | 2013 |
| Baker Davidson Limited | Professional & scientific | 2023 |
| Bakir RST Limited | Real estate | 2024 |
| Bakker Capital Limited | Real estate | 2022 |
| Balance Research Labs Limited | Information & communication | 2026 |
| Balancify Limited | Administrative & support | 2025 |
| Balbisi Financial Services Limited | Financial services | 2019 |
| Balbrogie Management Services Limited | Professional & scientific | 2019 |
| Ballater Property Ltd | Extraterritorial | 2025 |
| Ballbrook Court Limited | Households | 1975 |
| Ballet Ventures Ltd | Wholesale & retail | 2018 |
| Balr Holdings Ltd | Real estate | 2015 |
| Balr Management Ltd | Real estate | 2015 |
| Baltic Beer Company Ltd | Manufacturing | 2004 |
| Baltic Solutions Limited | Extraterritorial | 2020 |
| BAM Cars Limited | Transport & logistics | 2025 |
| BAM Enterprise Group Ltd | Financial services | 2025 |
| Bambu Express INT Ltd | Transport & logistics | 2025 |
| Bana Cafe & Restaurant Ltd | Hospitality | 2023 |
| Banana Dolce Ltd | Wholesale & retail | 2025 |
| Banayantree Ltd | Real estate | 2024 |
| Banda Solutions Ltd | Wholesale & retail | 2025 |
| Bandwidth Studios Limited | Extraterritorial | 2019 |
| Bang Tang MCR Limited | Hospitality | 2026 |
| Banging Bargains Limited | Wholesale & retail | 2016 |
| Bango Healthcare Limited | Health & social care | 2021 |
| Bangor Propco Limited | Real estate | 2022 |
| Bangor Securities 2 Limited | Real estate | 2021 |
| Bangor Securities Limited | Real estate | 2021 |
| Banini Plant Limited | Professional & scientific | 2019 |
| Bank Estates Limited | Real estate | 1995 |
| Bankhall Corner Holdings Limited | Real estate | 2012 |
| Bankside Development Partnership Limited | Real estate | 2016 |