| Biakath Healthcare Ltd | Other services | 2021 |
| Biancamia Ltd | Wholesale & retail | 2026 |
| Bibi Investments Limited | Real estate | 2000 |
| Biddles Retail Ltd | Wholesale & retail | 2014 |
| Biedronka Sklep Ltd | Wholesale & retail | 2021 |
| Bierley Community Association Limited | Other services | 2010 |
| Bierley Superstore & PO Ltd | Wholesale & retail | 2025 |
| Bifolddoor Warehouse Limited | Manufacturing | 2019 |
| Big Brother Discount Limited | Wholesale & retail | 2023 |
| Big Dog Fellas Limited | Other services | 2023 |
| Big Dog Land Ltd | Wholesale & retail | 2019 |
| Big Fellas Lilycroft Limited | Hospitality | 2026 |
| Big Fundraising Goals Ltd | Professional & scientific | 2017 |
| Big on Trade Ltd | Wholesale & retail | 2025 |
| Big Shelf Private Limited | Wholesale & retail | 2020 |
| Big Shotter Fireworks Limited | Wholesale & retail | 2017 |
| Big Wind Limited | Energy | 2014 |
| Big-Tv (UK) Limited | Professional & scientific | 2003 |
| Biggest Car Hire Ltd | Administrative & support | 2024 |
| Biggies Services Ltd | Construction | 2025 |
| Bigmansairguns Limited | Manufacturing | 2022 |
| BIH Hindley Limited | Hospitality | 2017 |
| Bijoutiful Ltd | Wholesale & retail | 2019 |
| Bike Buster Motorcycles Ltd | Wholesale & retail | 2012 |
| Bikeshape Subsidiary Ltd | Wholesale & retail | 2022 |
| Bila Mini Market Ltd | Wholesale & retail | 2018 |
| Bilal Autos Ltd | Wholesale & retail | 2025 |
| Bilal Education & Welfare Trust Limited | Administrative & support | 2009 |
| Bilal International Ltd | Wholesale & retail | 2023 |
| Bilal Locums Ltd | Wholesale & retail | 2008 |
| Bilal Optics Ltd | Health & social care | 2022 |
| Bilidaniel Limited | Real estate | 2023 |
| Bill Social Care Ltd | Health & social care | 2015 |
| Billa Rental Ltd | Administrative & support | 2023 |
| Bilpro Limited | Wholesale & retail | 2024 |
| Bilton Auto Accessories Ltd | Manufacturing | 2024 |
| Bilton Pharm Ltd | Wholesale & retail | 2024 |
| Bilton Pharmacy Ltd | Professional & scientific | 2012 |
| Bimtem Global Solutions Limited | Hospitality | 2026 |
| BIN Faheem’S Ltd | Wholesale & retail | 2025 |
| BIN Washers LLP | | 2009 |
| Binawwaf Ltd | Wholesale & retail | 2020 |
| Bingley Estates Limited | Administrative & support | 2018 |
| Bingley Landscapes Limited | Professional & scientific | 2016 |
| Bingley Management Limited | Information & communication | 2018 |
| Bingley Stone Limited | Wholesale & retail | 2002 |
| Binjo Ltd Ltd | Public administration | 2025 |
| Binns Electrical Contractors Limited | Administrative & support | 2017 |
| Binns Plumbing and Drainage Services Limited | Construction | 2019 |
| Biodiesel Depot Limited | Wholesale & retail | 2006 |
| Biomed Services Ltd | Wholesale & retail | 2024 |
| Biophilic Innovations Limited | Construction | 2025 |
| Bioshorts Ltd | Information & communication | 2023 |
| Biosycle Ltd | Professional & scientific | 2026 |
| Biotamins Ltd | Wholesale & retail | 2025 |
| BIP Enterprises Limited | Financial services | 2016 |
| Birch Inns Limited | Hospitality | 2026 |
| Birch Tree Holdings Limited | Real estate | 2020 |
| Birgitte Toft Accountancy Limited | Professional & scientific | 2012 |
| Birkbeck Structures Limited | Manufacturing | 2016 |
| Birkenshaw Optical Ltd | Wholesale & retail | 2023 |
| Birkhill Farm Equestrian Centre Limited | Agriculture & fishing | 2009 |
| Birksland Supplies Ltd | Other services | 2020 |
| Birmingham Bolt & NUT Company Limited | Wholesale & retail | 1982 |
| Biruk Sisay Limited | Transport & logistics | 2025 |
| Biscayne Construction Limited | Construction | 2019 |
| Biscayne Investment Properties Limited | Real estate | 2020 |
| Biscayne Properties Ltd | Real estate | 2009 |
| Biscayne Residential Properties Limited | Real estate | 2019 |
| Biscayne@Ocw (Leeds) Limited | Households | 2021 |
| Biscaynexpress Limited | Wholesale & retail | 2011 |
| Bishop & Co Recruitment Ltd | Administrative & support | 2017 |
| Bishop Mezz Holdco Limited | Financial services | 2026 |
| Bishop Mezzco Limited | Financial services | 2026 |
| Bishop Propco Limited | Financial services | 2026 |
| Bishop Senior Holdco Limited | Financial services | 2026 |
| Bishops Commercial Cleaning Ltd | Administrative & support | 2025 |
| Bismillah Accessories Ltd | Wholesale & retail | 2015 |
| Bismillah Enterprise Ltd | Manufacturing | 2020 |
| Bismillah Gift Centre Ltd | Wholesale & retail | 2020 |
| Bismillah Halal Meat Store Limited | Wholesale & retail | 2018 |
| Bismillah Investments (BFD) Ltd | Real estate | 2021 |
| Bismillah Investments (Bradford) Ltd | Real estate | 2021 |
| Bismillah Roti House (Bradford) Limited | Hospitality | 2022 |
| Bismillah Training Services Ltd | Education | 2025 |
| Bismillah Wholesalers Ltd | Wholesale & retail | 2026 |
| Bison (BFD) Ltd | Hospitality | 2024 |
| Bison Bede Limited | Manufacturing | 1998 |
| Bison Electrical & Management Ltd | Energy | 2026 |
| Bison Smokehouse Ltd | Hospitality | 2026 |
| Bistro 804 Ltd | Hospitality | 2024 |
| Bitcube Ltd | Information & communication | 2021 |
| Bite&Brew Ltd | Hospitality | 2025 |
| Bitmez Leisure Limited | Hospitality | 2021 |
| Bitz Store Limited | Wholesale & retail | 2017 |
| BIZ Branding Ltd | Wholesale & retail | 2021 |
| BIZ DOT Ltd | Wholesale & retail | 2023 |
| Biz-E Music Limited | Information & communication | 2008 |
| Bizwisers Ltd | Professional & scientific | 2025 |
| Bj&Ha Holdings Limited | Real estate | 2025 |