| Bandesha Property Services Ltd | Real estate | 2022 |
| Bandook Ltd | Wholesale & retail | 2017 |
| Bangla Cloud Ltd | Professional & scientific | 2024 |
| Banjo Tech Ltd | Information & communication | 2016 |
| Bann Mata Ltd | Transport & logistics | 2019 |
| Banning Academy Ltd | Education | 2019 |
| Banning Corporation Ltd | Financial services | 2024 |
| Banning Dental Group Ltd | Health & social care | 2018 |
| Banning Dental LAB Ltd | Health & social care | 2021 |
| Banning Enterprise Limited | Financial services | 2024 |
| Banning Estates Ltd | Real estate | 2023 |
| Banning Group Properties Ltd | Real estate | 2019 |
| Banning Holdings Ltd | Financial services | 2021 |
| Banning Manor Limited | Financial services | 2026 |
| Banning Partnership Ltd | Financial services | 2023 |
| Banning Skin Ltd | Health & social care | 2021 |
| Bansal UK Trading Ltd | Transport & logistics | 2024 |
| Bantoro Ltd | Wholesale & retail | 2022 |
| Banyard Market Research Ltd | Professional & scientific | 2025 |
| Bar Auto Logistics Ltd | Wholesale & retail | 2024 |
| Bara Properties Ltd | Real estate | 2021 |
| Baraka Fresh Limited | Wholesale & retail | 2025 |
| Baraka Rahma Company Ltd | Real estate | 2021 |
| Barakah Investment Holdings Limited | Financial services | 2025 |
| Baraz Limited | Real estate | 2022 |
| Barber Shop (Hadi) Limited | Other services | 2015 |
| Barber ZH Ltd | Other services | 2026 |
| Barcelona Hair & Beauty Ltd | Other services | 2025 |
| Barclay Wood Properties Limited | Real estate | 2018 |
| Bargain Accessories UK Ltd | Wholesale & retail | 2018 |
| Bargain Deals Hub Ltd | Wholesale & retail | 2023 |
| Bargain Rental Limited | Administrative & support | 2022 |
| Barklife Limited | Extraterritorial | 2015 |
| Barley Close Developments Limited | Construction | 2016 |
| Barna International Limited | Manufacturing | 2024 |
| Barney Bees Day Nursery Limited | Health & social care | 2002 |
| Barnfield Healthcare Ltd | Health & social care | 2021 |
| Barnzie Ltd | Administrative & support | 2024 |
| Baroid Property Management Ltd | Real estate | 2025 |
| Baroush Holdings Ltd | Professional & scientific | 2024 |
| Barqon Ltd | Wholesale & retail | 2025 |
| BARSANFLORIN82 Ltd | Transport & logistics | 2025 |
| Barton Car Care Ltd | Wholesale & retail | 2026 |
| Barton House Care Limited | Health & social care | 2021 |
| Barty House Nursing Home Limited | Health & social care | 2000 |
| Baryon Holdings Limited | Financial services | 2021 |
| Base Academy Ltd | Education | 2026 |
| Base Impact Ltd | Professional & scientific | 2019 |
| BASE2ROOF Builders Ltd | Construction | 2026 |
| Basedin Amber Ltd | Transport & logistics | 2026 |
| Bash Collection Ltd | Wholesale & retail | 2021 |
| Basharat Tharwa Realty Limited | Real estate | 2025 |
| Bashir N Sons Limited | Wholesale & retail | 2026 |
| Basil & Fitch Ltd | Wholesale & retail | 2023 |
| Basil Technologies Limited | Information & communication | 2010 |
| Basit Chauffeur Limited | Transport & logistics | 2023 |
| Basket 365 UK Limited | Wholesale & retail | 2019 |
| Bassi Consultancy Ltd | Health & social care | 2020 |
| Bassil Limited | Wholesale & retail | 2004 |
| Basstree Holdings Limited | Real estate | 2017 |
| Batelle Solutions Ltd | Construction | 2025 |
| Bath Road Mots Ltd | Wholesale & retail | 2025 |
| Bath Road Tyres Ltd | Wholesale & retail | 2024 |
| Batita Ltd | Transport & logistics | 2024 |
| Batra Constructionswb Limited | Administrative & support | 2025 |
| Batree UK Ltd | Professional & scientific | 2018 |
| Batth Construction Limited | Construction | 2016 |
| Batth Estates Ltd | Real estate | 2025 |
| Batth Ltd | Transport & logistics | 2025 |
| Batth Prime Transport Limited | Transport & logistics | 2025 |
| Battula Properties Limited | Real estate | 2023 |
| BAU Commercial Ltd | Professional & scientific | 2019 |
| Bauer Events Limited | Arts & recreation | 2005 |
| Bauer Residential Ltd | Construction | 2013 |
| Bawa International Ltd | Wholesale & retail | 2017 |
| Bawan Xarebi Ltd | Wholesale & retail | 2025 |
| Baxi Limited | Real estate | 2019 |
| Baxters Homecare Ltd | Health & social care | 2013 |
| Baylis Convenience Store Ltd | Wholesale & retail | 2022 |
| Baylis Events Limited | Hospitality | 2022 |
| Baylis Green Limited | Wholesale & retail | 2023 |
| Baylis Park Hotel Ltd | Hospitality | 2024 |
| Baylis Traffic Management Ltd | Other services | 2024 |
| Baym Ltd | Professional & scientific | 2020 |
| Bayt & Bond Limited | Construction | 2025 |
| BAZ Construction Ltd | Construction | 2018 |
| Bazwa Enterprises Ltd | Transport & logistics | 2026 |
| BB Builders Ltd | Construction | 2024 |
| BB Logistics (London) Limited | Extraterritorial | 2005 |
| Bbf/Gb Limited | Arts & recreation | 2026 |
| BBG Electrical Ltd | Construction | 2011 |
| BBI Tech Solutions Ltd | Information & communication | 2025 |
| BBL Infotech Ltd | Information & communication | 2012 |
| Bbliss Ltd | Hospitality | 2025 |
| Bbsj Limited | Transport & logistics | 2025 |
| BC Management Services 247 Ltd | Other services | 2025 |
| BCA Landscapes & Gates Ltd | Administrative & support | 2019 |
| BCB 3 Ltd | Construction | 2025 |
| Bcent Limited | Real estate | 2021 |
| BCS Global Networks Limited | Information & communication | 2004 |