| B2L Property Investments Ltd | Real estate | 2018 |
| B51 Limited | Administrative & support | 2021 |
| B:D Landscape Architects Limited | Professional & scientific | 2008 |
| BA Digital Services Limited | Administrative & support | 2023 |
| Baaz Site Services Ltd | Construction | 2023 |
| Baazmotors Ltd | Wholesale & retail | 2025 |
| Baazsingh Construction Ltd | Construction | 2024 |
| Baba Fateh Singh Concrete MIX Ltd | Construction | 2022 |
| Baban Auto Cars Ltd | Wholesale & retail | 2024 |
| Babany H Ltd | Wholesale & retail | 2021 |
| Baber Maqsood Ltd | Professional & scientific | 2026 |
| Baby Hemp Limited | Wholesale & retail | 2026 |
| Baby Sienna Ltd | Education | 2015 |
| Baby Travel U.K. Ltd | Wholesale & retail | 2016 |
| Babylon Bistro Limited | Hospitality | 2025 |
| Babyprem Limited | Manufacturing | 2010 |
| BAC Urban Living Limited | Real estate | 2018 |
| BAC123 Ltd | Real estate | 2020 |
| Baccatrum Ltd | Administrative & support | 2021 |
| Back on the Rack Clothing Ltd | Wholesale & retail | 2025 |
| Back on Track Chiropractic Clinic Ltd | Administrative & support | 2019 |
| BACK2PRINT Ltd | Manufacturing | 2010 |
| Backlink Huber Ltd | Information & communication | 2023 |
| Backylinks Ltd | Information & communication | 2024 |
| Bacmann Ltd | Construction | 2021 |
| BAD Apple Hair Salons UK Limited | Other services | 2013 |
| BAD Company Basketball Community Ltd | Other services | 2025 |
| BAD Saint Promotions Ltd | Other services | 2023 |
| BAD Seed Vintage Ltd | Wholesale & retail | 2021 |
| Badal Consultancy Ltd | Wholesale & retail | 2025 |
| Badal Properties Ltd | Real estate | 2017 |
| Badar Communication Ltd | Education | 2026 |
| Badarau Property Group Ltd | Real estate | 2025 |
| Badger & FOX Homes Ltd | Real estate | 2026 |
| Badger Property Services Limited | Real estate | 2001 |
| Badh Transport Limited | Transport & logistics | 2019 |
| Baggeridge Four Holdings Limited | Financial services | 2025 |
| Bagley Construction Limited | Real estate | 1968 |
| Bagridge Road Management Company Limited | Households | 2016 |
| Bags R US Nationwide Limited | Wholesale & retail | 2013 |
| Bagsmania Ltd | Wholesale & retail | 2025 |
| BAH Merry Hill Limited | Other services | 2021 |
| Bahadarwala Ltd | Wholesale & retail | 2026 |
| Bahia Corporation Limited | Real estate | 2006 |
| Bahia Holdings Ltd | Real estate | 2017 |
| Bahia Properties Services Ltd | Real estate | 2018 |
| Bahia QS Services Ltd | Professional & scientific | 2012 |
| Bahra Builders & Developers Limited | Construction | 2007 |
| Bahra Builders Limited | Construction | 2017 |
| Bahra Construction Ltd | Extraterritorial | 2025 |
| BAI JI Transport Ltd | Transport & logistics | 2025 |
| Bailey 9 Investment Limited | Real estate | 2025 |
| Bailey TTM Ltd | Transport & logistics | 2026 |
| Bains & Bains Limited | Information & communication | 2011 |
| Bains (GB) Ltd | Real estate | 2014 |
| Bains Digital Ltd | Information & communication | 2025 |
| Bains Financial Services Limited | Financial services | 2018 |
| Bains Foundation | Health & social care | 2009 |
| Bains Group Ltd | Wholesale & retail | 2017 |
| Bains Investments Limited | Real estate | 2011 |
| Bains Supermarket Ltd | Wholesale & retail | 2023 |
| Bains Supersave Ltd | Wholesale & retail | 1994 |
| Bains Trust | Health & social care | 2021 |
| Baiya Ltd | Wholesale & retail | 2021 |
| Bajwa and Syal Ltd | Wholesale & retail | 2023 |
| Bajwa Brothers Transport Ltd | Transport & logistics | 2024 |
| Bajwa Construction Services Ltd | Construction | 2025 |
| Bajwa Electrical Installations Ltd | Construction | 2024 |
| Bajwa Freightways Ltd | Transport & logistics | 2019 |
| Bajwa’S Superstore Ltd | Wholesale & retail | 2024 |
| Baker Flooring Limited | Construction | 1983 |
| Baker Groundworks Ltd | Construction | 2019 |
| Bakers Dozen Ltd | Wholesale & retail | 2026 |
| Bakersbrew Limited | Hospitality | 2025 |
| BAL Brothers & SON Ltd | Wholesale & retail | 2025 |
| BAL Haulier Ltd | Wholesale & retail | 2022 |
| BAL Property Development Ltd | Real estate | 2026 |
| BAL Transport Hub Ltd | Transport & logistics | 2026 |
| BAL Transport Ltd | Transport & logistics | 2026 |
| BAL Transport U.K. Limited | Transport & logistics | 2021 |
| Bal's Fish Bar Ltd | Hospitality | 2021 |
| Bala 612 Property Ltd. | Real estate | 2019 |
| Balaj & Co Ltd | Wholesale & retail | 2025 |
| Balanced Real Estate Limited | Real estate | 2024 |
| Baldev Investments Limited | Real estate | 2021 |
| Baldwin Repair Services Limited | Manufacturing | 2003 |
| Ballistic Productions Ltd | Information & communication | 2024 |
| Bally Interiors Limited | Construction | 2020 |
| Baltic Supermarket (WV) Ltd | Wholesale & retail | 2019 |
| Balticspasandsaunas Ltd | Wholesale & retail | 2026 |
| Balu Sky Limited | Transport & logistics | 2004 |
| Bamboo Hair Limited | Other services | 2007 |
| Bamo Services Ltd | Construction | 2024 |
| Banahan Rogers Smith Limited | Extraterritorial | 2015 |
| Banalex Limited | Other services | 2002 |
| Bancroft Marketing Limited | Professional & scientific | 2011 |
| Banerjee Studio Limited | Professional & scientific | 2019 |
| Banga Properties Ltd | Real estate | 2004 |
| Banga Property Investments Ltd | Real estate | 2026 |
| Banga Stores Ltd | Wholesale & retail | 2025 |