| Banner Investments Limited | London | 2024 |
| Bannerman Consulting Group Limited | Fareham | 2026 |
| Bannerman Decorators EOT Trustee Limited | Perth | 2026 |
| Bannerman Holdings Limited | Perth | 2025 |
| Bannerman Johnstone Maclay Holdings Limited | Glasgow | 2018 |
| Bannerman Rendell Limited | London | 1958 |
| Banners Gate Holdings Limited | Halesowen | 2025 |
| Banners Investment Limited | Hull | 2025 |
| Bannerstar Limited | London | 1992 |
| Bannif Ltd | Bury | 2022 |
| Banning Corporation Ltd | Slough | 2024 |
| Banning Enterprise Limited | Slough | 2024 |
| Banning Holdings Ltd | Slough | 2021 |
| Banning Manor Limited | Slough | 2026 |
| Banning Partnership Ltd | Slough | 2023 |
| Bannister Holdings Limited | London | 2022 |
| Bannon and Bannon Property (Commercial) 4 Limited | Belfast | 2025 |
| Bannon and Bannon Property (Commercial) 5 Ltd | Belfast | 2025 |
| Bannon and Bannon Property (Commercial) 6 Ltd | Belfast | 2026 |
| Bannon and Bannon Property (Commercial) 7 Ltd | Belfast | 2026 |
| Bannon and Bannon Property (Commercial) Three Limited | Belfast | 2024 |
| Bannon and Bannon Property (Commercial) Two Limited | Belfast | 2024 |
| Bannr Limited | Cowbridge | 2026 |
| Bannsiders Holdings Limited | Belfast | 2023 |
| Banoze Holdings Ltd | London | 2026 |
| Banpay (UK) Limited | London | 2020 |
| Banq Global Ltd | London | 2023 |
| Banque Capital Suisse Ltd | London | 2012 |
| Banque DE Paris Ltd | Bradford | 2019 |
| Banque Espana SA Ltd | Bradford | 2019 |
| Banque Internationale DE Credit ET DE Gestion Limited | London | 2006 |
| Banquerex Financial Corp. Limited | Sittingbourne | 2022 |
| Banquets Investments Holdings Limited | London | 2017 |
| Banquets New Holdings Limited | London | 2017 |
| Banqum Ltd | London | 2023 |
| Banquva Ltd | Gerrards Cross | 2017 |
| Bans Financial Services Ltd | West Bromwich | 2021 |
| Bansal Brothers Limited | Dunstable | 2017 |
| Bansal Investments Ltd | Derby | 2021 |
| Bansal Private Office Limited | Wolverhampton | 2025 |
| Banstead Meisuria Limited | London | 2026 |
| Bantam Newco Limited | Loughborough | 2025 |
| Bantham Capital Limited | Birmingham | 2024 |
| Banton Dare Investments Limited | Bolton | 2025 |
| Bantry Finance Ltd | London | 2023 |
| Bantu Finance Ltd | London | 2019 |
| Bantu Investments Ltd | Watford | 2006 |
| Banwait Capital Limited | Wakefield | 2021 |
| Banwait Group Holdings Limited | Wakefield | 2018 |
| Banxlocal.Uk Limited | Littlehampton | 2023 |
| Banyan Capital Advisory Limited | London | 2026 |
| Banyan Care Holdings Limited | Bristol | 2022 |
| Banyan Financial Solutions Ltd | Uxbridge | 2025 |
| Banyan Risk UK Ltd | Ruislip, | 2025 |
| Banyan Tree Capital Ltd | Bushey | 2025 |
| Banyard Construction Holdings Ltd | Poole | 2024 |
| Banyard Independent Advice Services Ltd | Saundersfoot | 2016 |
| Banyo Holdings Limited | Leicester | 2026 |
| Banzai Pipeline Limited | London | 2023 |
| BAO Bite Holdings Ltd | Stockport | 2025 |
| BAO BUN (Asia) Ltd | Alton | 2022 |
| BAO Holdings Limited | Bromyard | 2025 |
| Baobab Capital Management Ltd | London | 2024 |
| Baobab Financial Solutions Limited | Camberley | 2026 |
| Baobab Holdings Limited | London | 2016 |
| Baobab Immobilier Corporation Ltd. | London | 2023 |
| Baobab Investment Managers Holdings Limited | London | 2023 |
| Baobab Investment Managers Ltd | London | 2010 |
| Baobab Pledge Ltd | London | 2023 |
| Baobab Securities Limited | London | 2014 |
| Baobab Special Opportunities Ltd | London | 2023 |
| Baobab Ventures Limited | London | 2023 |
| Baobit Ltd | Cardiff | 2021 |
| Baoding Zhengyan Clothing Sales Co., Ltd. | Kenilworth | 2023 |
| Baoyu Family Limited | Glasgow | 2023 |
| BAP Holdings Limited | Spitalfields | 2023 |
| BAP Pharma Holdings Limited | Marlow | 2022 |
| Bapchild Propco 1 Limited | Gillingham | 2024 |
| Bapell Group Limited | Prenton | 2024 |
| Baptist Insurance Company PLC the | Gloucester | 1905 |
| Baptist Missionary Society Pension Trust Limited | Didcot | 1997 |
| Baptist Pension Trust Limited | Didcot | 1997 |
| Bapty House Investments Limited | Newcastle Upon Tyne | 2021 |
| Bapty Investments Limited | Southall | 2018 |
| Baqueira Capital Limited | London | 2022 |
| Bar APG Scheme Corporate Trustee Limited | Watford | 2017 |
| Bar Bidco Limited | Taunton | 2023 |
| Bar Financial Services Ltd | Newcastle Upon Tyne | 2018 |
| Bar Investments Limited | London | 2021 |
| Bar Mutual Indemnity Fund Limited | London | 1987 |
| Bara Beru Byth Limited | Pwllheli | 2024 |
| Bara Group Ltd | Farnborough | 2025 |
| Baradaran Ltd | Batley | 2025 |
| Barak Holdings Limited | St. Ives | 2025 |
| Baraka Atlantic Ltd | London | 2025 |
| Baraka Valley Holdings Ltd | London | 2026 |
| Baraka Ventures Limited | London | 2025 |
| Barakah and Nama Capital Ltd | Anlaby | 2025 |
| Barakah Asset Holdings Limited | Northampton | 2025 |
| Barakah Invest Ltd | Shropshire, Shifnal | 2020 |