| Balliol Medical Services Ltd | Health & social care | 2012 |
| Ballistic Coaching Academy Ltd | Education | 2025 |
| Ballistic Performance Limited | Arts & recreation | 2020 |
| Ballistic Performance Quays Limited | Arts & recreation | 2025 |
| Ballito BRU Ltd | Hospitality | 2022 |
| Balloon Bloom Ltd | Wholesale & retail | 2023 |
| Balloon Magic Party Decor Ltd | Arts & recreation | 2022 |
| Balloons by Bryna Ltd | Other services | 2020 |
| Balloons Plus Limited | Other services | 2017 |
| Ballwinner Limited | Information & communication | 2005 |
| Balm Diagnostics Ltd | Health & social care | 2024 |
| Balmer & Co Lettings Limited | Real estate | 2019 |
| Balmer & Co Sales Limited | Real estate | 2023 |
| Balmira PVT Ltd | Wholesale & retail | 2025 |
| Balmoral Business Services (M/C) Limited | Professional & scientific | 2016 |
| Balmoral Events Ltd | Administrative & support | 2023 |
| Balmoral Finance Limited | | 1986 |
| Baloch Group of Companies Limited | Wholesale & retail | 2025 |
| Baloch Pizza and Kebabs Ltd | Hospitality | 2025 |
| Balochmotorfactors Ltd | Wholesale & retail | 2026 |
| Balouchi Bros Limited | Wholesale & retail | 2019 |
| Balozwi Treasure Limited | Health & social care | 2014 |
| Balqees Propertys Limited | Real estate | 2025 |
| Balrs Anonymous Ltd | Wholesale & retail | 2019 |
| Balsa Commercial Finance Limited | Financial services | 2022 |
| Balsamic Food Trading Ltd | Wholesale & retail | 2026 |
| Balti Brasserie Limited | Hospitality | 2017 |
| Balti Macclesfield Ltd | Hospitality | 2022 |
| Balti Madras Limited | Hospitality | 2022 |
| Balti Spice Ltd | Hospitality | 2022 |
| Baltic Bakehouse Limited | Administrative & support | 2012 |
| Baltic Commercial Ltd | Real estate | 2015 |
| Baltic Trade for General Trading Ltd | Wholesale & retail | 2026 |
| Baltic Triangle Management Company Limited | Households | 2003 |
| Baltyk Holdings Ltd | Other services | 2024 |
| Baltyk Store Limited | Wholesale & retail | 2024 |
| Baluwa Services Ltd | Construction | 2020 |
| Balwin Limited | Transport & logistics | 2025 |
| BAM Group Holdings Ltd | Financial services | 2018 |
| BAM Housing Group Ltd | Real estate | 2023 |
| BAM Imports Ltd | Wholesale & retail | 2026 |
| BAM Logistics Ltd | Transport & logistics | 2023 |
| BAM Music Limited | Administrative & support | 2017 |
| BAM Print Ltd | Administrative & support | 2018 |
| BAM Property Ltd | Real estate | 2025 |
| Bamade Grace Care Limited | Professional & scientific | 2026 |
| BAMB1 Limited | Extraterritorial | 2020 |
| Bamberger Childcare Ltd | Health & social care | 2021 |
| Bambers Inclusive C.I.C. | Health & social care | 2023 |
| Bambi Fitness Ltd | Arts & recreation | 2025 |
| Bambi Lessons Ltd | Education | 2022 |
| Bambi Ltd | Hospitality | 2023 |
| Bambino Day Nursery (Wycombe) Limited | Education | 2018 |
| Bambino Hannah House Nursery Limited | Education | 1999 |
| Bambinu Limited | Wholesale & retail | 2023 |
| Bambis Driving School Limited | Education | 2026 |
| Bamboo & Mischief Limited | Wholesale & retail | 2016 |
| Bamboo Bakes Ltd | Manufacturing | 2020 |
| Bamboo Brain Ltd | Wholesale & retail | 2026 |
| Bamboo Childcare Limited | Administrative & support | 2009 |
| Bamboo Crest Advisory Team Ltd | Extraterritorial | 2026 |
| Bamboo Express Ltd | Hospitality | 2019 |
| Bamboo Garden Manchester Ltd | Hospitality | 2026 |
| Bamboo Manchester SEO Limited | Information & communication | 2023 |
| Bamboo Marketing Northwest Limited | Financial services | 2020 |
| Bamboo Mobile Limited | Information & communication | 2014 |
| Bamboo Recruitment Limited | Administrative & support | 2009 |
| Bamboo Soft Limited | Wholesale & retail | 2024 |
| Bamboo Tree Restaurant Company Limited | Hospitality | 2020 |
| Bambs Property Ltd | Real estate | 2021 |
| Bamburgh Capital Investments LLP | | 2020 |
| Bamburgh Capital Limited | Financial services | 2010 |
| Bamburgh Group Limited | Professional & scientific | 2023 |
| Bamburi Group Limited | Real estate | 2021 |
| Bamburi Holdings Limited | Financial services | 2021 |
| Bamburi Limited | Hospitality | 2021 |
| Bambus Ventures Ltd | Real estate | 2024 |
| Bamby Ltd | Real estate | 2016 |
| Bamcc Ltd | Real estate | 2021 |
| Bamemra Ltd | Real estate | 2024 |
| Bamer Solutions Limited | Transport & logistics | 2019 |
| Bamford & Bamford Limited | Real estate | 2012 |
| Bamford Book Keeping Services Ltd | Professional & scientific | 2022 |
| Bamford Court Management Limited | Households | 1981 |
| Bamford Estates Limited | Construction | 2014 |
| Bamford Management Consultancy Ltd | Professional & scientific | 2026 |
| Bamford Mews Management Company Limited | Households | 1999 |
| Bami Trading Ltd | Wholesale & retail | 2025 |
| Bamidele Enterprise Limited | Health & social care | 2023 |
| Bamsa Limited | Wholesale & retail | 2021 |
| Bamsi Dogan Ltd | Health & social care | 2020 |
| Bamyan Property Group Ltd | Construction | 2024 |
| BAN JIN Holdings Limited | Real estate | 2023 |
| BAN JIN Limited | Hospitality | 2016 |
| BAN Phai Thong Ltd | Hospitality | 2018 |
| Ban-Cole Accountants Ltd | Professional & scientific | 2024 |
| Bana Car Wash Ltd | Wholesale & retail | 2025 |
| Bana's Housing Ltd | Real estate | 2025 |
| Banak Services Ltd | Health & social care | 2018 |
| Banana Enterprise Ltd | Professional & scientific | 2016 |