| Bruri GAS Ltd | Construction | 2023 |
| Bruri Ltd | Construction | 2023 |
| Brush and Paint Limited | Arts & recreation | 2025 |
| Brush Closures Limited | Manufacturing | 2021 |
| Brush’N’Play Ltd | Manufacturing | 2026 |
| Brusselsmara Ltd | Information & communication | 2023 |
| Brute Force Records Limited | Extraterritorial | 2009 |
| Brute UK Ltd | Wholesale & retail | 2025 |
| Brux Fencing Limited | Construction | 2007 |
| BRW Trade Ltd | Wholesale & retail | 2023 |
| Brwa Barber Shop Limited | Other services | 2024 |
| Bryan David Nabb Ltd | Transport & logistics | 2016 |
| Bryant Park Estates Ltd | Real estate | 2019 |
| Brydon Managements Limited | Real estate | 2025 |
| Brygate Construction Limited | Construction | 2017 |
| Brymau 3 Saltney Ltd | Real estate | 2020 |
| Bryn Hilton Motor Engineering Ltd | Wholesale & retail | 2011 |
| Bryn Properties Limited | Hospitality | 2020 |
| Brynden Services Limited | Administrative & support | 2017 |
| Brynford Ltd | Administrative & support | 2022 |
| Bryseldphoenix Ltd | Health & social care | 2018 |
| Brysk Wellness and Recovery Ltd | Health & social care | 2023 |
| Bryxers Ltd | Transport & logistics | 2023 |
| BS Building Services Manchester Ltd | Construction | 2019 |
| BS Consultants Ltd | Professional & scientific | 2026 |
| BS Digital Marketing Limited | Professional & scientific | 2025 |
| BS Healthcare Services Ltd | Health & social care | 2025 |
| BS Hire Ltd | Professional & scientific | 2015 |
| BS Manchester Ltd | Education | 2015 |
| BS Prospect Consultancy Limited | Construction | 2017 |
| BS Traders PVT Ltd | Wholesale & retail | 2024 |
| BS Vogue Limited | Wholesale & retail | 2025 |
| BS4C Finance Limited | Financial services | 2022 |
| BSA Dental Limited | Health & social care | 2025 |
| BSA Prop Limited | Administrative & support | 2010 |
| BSA Surveying Limited | Professional & scientific | 2019 |
| Bsafm Carry LLP | | 2017 |
| Bsaj Luxury Hair Ltd | Wholesale & retail | 2024 |
| Bsam Kiesse Ltd | Manufacturing | 2025 |
| Bsamuel Limited | Hospitality | 2025 |
| BSB & Sons Ltd | Other services | 2026 |
| BSB Business Services Ltd | Transport & logistics | 2021 |
| BSB North-West Limited | Professional & scientific | 2018 |
| BSB Progeny Ltd | Manufacturing | 2023 |
| BSB Property Services Ltd | Real estate | 2026 |
| BSB Realisations Limited | Manufacturing | 2023 |
| Bsbb Holdings Ltd | Financial services | 2024 |
| BSC Builders Limited | Construction | 2006 |
| BSD 613 Limited | Professional & scientific | 2021 |
| BSD Civil Limited | Professional & scientific | 2017 |
| BSD Consultancy Ltd | Professional & scientific | 2002 |
| BSD Consultants Limited | Professional & scientific | 2018 |
| BSD Estates Ltd | Real estate | 2016 |
| BSD London Limited | Real estate | 2025 |
| BSD London NO 1 Limited | Real estate | 2026 |
| BSD Management Consultants Limited | Financial services | 2004 |
| BSD Phoenix NO 1 Ltd | Real estate | 2025 |
| BSD Phoenix NO 2 Ltd | Real estate | 2025 |
| BSD Productions Ltd | Information & communication | 2025 |
| BSD UK Investments NO 2 Ltd | Real estate | 2025 |
| BSD UK Investments NO 3 Ltd | Real estate | 2025 |
| Bsdmhbs Ltd | Real estate | 2022 |
| Bsdna Ltd | Extraterritorial | 2012 |
| BSE Locums Ltd | Other services | 2022 |
| Bsem Wear Ltd | Wholesale & retail | 2020 |
| BSG & Sons Ltd | Wholesale & retail | 2026 |
| BSG Interiors Limited | Professional & scientific | 2021 |
| BSG Realty Group Ltd | Real estate | 2026 |
| Bshapes Limited | Health & social care | 2025 |
| Bsht Meetings Limited | Health & social care | 2002 |
| BSI Group Limited | Other services | 1995 |
| Bsissoho Limited | Transport & logistics | 2014 |
| BSK Electric Plumbing GAS Building Services Ltd | Construction | 2025 |
| BSK Properties and Management Ltd | Real estate | 2021 |
| BSL Umbrella Limited | Administrative & support | 2010 |
| Bsmc Consultants Ltd | Professional & scientific | 2022 |
| Bsmh Limited | Professional & scientific | 1990 |
| Bsmsr Limited | Extraterritorial | 1992 |
| Bsoosc Ltd | Education | 2025 |
| BSR Laundry Ltd | Other services | 2023 |
| BSR Private Rental Limited | Real estate | 2023 |
| BSR Property Solutions Limited | Real estate | 2025 |
| BSR Real Estate Ltd | Real estate | 2012 |
| BSR02 Ltd | Wholesale & retail | 2022 |
| Bsrepeat Ltd | Wholesale & retail | 2025 |
| BSS Capital Limited | Real estate | 2024 |
| Bstardigital Ltd | Information & communication | 2025 |
| Bstockes Ltd | Wholesale & retail | 2023 |
| BSU Firepro Ltd | Construction | 2020 |
| Bsvv Ltd | Health & social care | 2019 |
| BT Fleet Cleaning Services Ltd | Administrative & support | 2014 |
| BT FSS Limited | Administrative & support | 2019 |
| BT OFF Licence Ltd | Wholesale & retail | 2026 |
| BT Plumbing & Heating Limited | Construction | 2026 |
| BT Safe and Secure Limited | Wholesale & retail | 2021 |
| BT Software Europe Limited | Information & communication | 2002 |
| BTC Motor Repairs Limited | Wholesale & retail | 2009 |
| BTD Global Ltd | Administrative & support | 2024 |
| BTD Training and Consultancy Ltd | Administrative & support | 2016 |
| Btez Limited | Wholesale & retail | 2025 |