| Big Top Marquees and Decorations Limited | Arts & recreation | 2015 |
| Big Top Properties Ltd | Real estate | 2020 |
| Big V VW Limited | Wholesale & retail | 2018 |
| Big Zee's Bargains Ltd | Wholesale & retail | 2026 |
| Bigfizz Games Limited | Information & communication | 2007 |
| Bigg Akbar Ltd | Hospitality | 2025 |
| Bigg Music Only Ltd | Information & communication | 2021 |
| Bigg NAD Ltd | Hospitality | 2023 |
| Bigger Picture Property Limited | Wholesale & retail | 2024 |
| Biggs Innovations Ltd. | Wholesale & retail | 2024 |
| Biggy's Auto Techs Ltd | Wholesale & retail | 2023 |
| Bighope UK Limited | Real estate | 2020 |
| Bigmind Sports Limited | Administrative & support | 2018 |
| Bigmommas Ltd | Hospitality | 2024 |
| Bignall (Holdings) Ltd | Financial services | 2020 |
| Bigtime Cleaners Limited | Administrative & support | 2021 |
| Bigtooth Studios Ltd | Information & communication | 2020 |
| Biis Research Limited | Professional & scientific | 2026 |
| Bijaya Anaesthetic Services Ltd | Health & social care | 2004 |
| Bijou Boudoir Ltd | Wholesale & retail | 2016 |
| BIK Kitchen & Bedroom Ltd | Manufacturing | 2022 |
| BIK Transport Ltd | Transport & logistics | 2021 |
| Bikaner Sweet Centre Limited | Wholesale & retail | 2022 |
| Bikaner Sweets Factory Limited | Hospitality | 2025 |
| Bike Pro Racing Limited | Wholesale & retail | 2014 |
| Bikers Clearance World Limited | Wholesale & retail | 1998 |
| Bikers' Best Ltd | Wholesale & retail | 2024 |
| Bikerswear (Bham) Limited | Wholesale & retail | 2016 |
| Bikinikinini Limited | Administrative & support | 2017 |
| BIL Ltd | Transport & logistics | 2015 |
| Bila Law Academy CIC | Education | 2021 |
| Bila Legal Services Ltd | Professional & scientific | 2021 |
| Bilal Builders BHM Ltd | Construction | 2024 |
| Bilal Construction Group Ltd | Construction | 2026 |
| Bilal Farah Ltd | Transport & logistics | 2025 |
| Bilal Food & Drinks Ltd | Administrative & support | 2016 |
| Bilal Halal Ltd | Wholesale & retail | 2025 |
| Bilal Homes Ltd | Real estate | 2026 |
| Bilal Sharif Advocacy & Advice Services Ltd | Administrative & support | 2022 |
| Bilal's Kitchen #Lovefood Ltd | Hospitality | 2019 |
| Bilal’S Kitchen Ltd | Hospitality | 2025 |
| Bilan Ltd | Health & social care | 2022 |
| Bilan Textiles Ltd | Other services | 2026 |
| Bilashenterprises Ltd | Wholesale & retail | 2026 |
| Bilawal Enterprise Ltd | Administrative & support | 2019 |
| Bilberry Education Services Ltd | Education | 2023 |
| Bilberry Resourcing Ltd | Administrative & support | 2019 |
| Bilborough Convenience Store Limited | Wholesale & retail | 2024 |
| Bilborough News Limited | Wholesale & retail | 2025 |
| Bilbro Ltd | Information & communication | 2026 |
| Bilga Enterprise Ltd | Education | 2022 |
| Biliv Care Limited | Other services | 2018 |
| Bill Lions Ltd | Administrative & support | 2020 |
| Bill Parmar Limited | Hospitality | 2016 |
| Bill's Archive Limited | Information & communication | 2026 |
| Bill's Supermarket Ltd | Wholesale & retail | 2010 |
| Bill-Omo Limited | Real estate | 2011 |
| Billa & Aariz Limited | Wholesale & retail | 2024 |
| Billesley ARK Volunteers CIC | Health & social care | 2018 |
| Billesley Housing Limited | Real estate | 2025 |
| Billesley P O Limited | Transport & logistics | 2008 |
| Billesley Pharma Ltd | Wholesale & retail | 2023 |
| Billicann Holdings Limited | Financial services | 2022 |
| Billig Holdings Ltd | Financial services | 2020 |
| Billingham Electrical Limited | Construction | 2023 |
| Billingham Logistics Limited | Transport & logistics | 2017 |
| Billionaires Toy Club Ltd | Wholesale & retail | 2025 |
| Bills Superstores Ltd | Wholesale & retail | 2023 |
| Billsedge Catering Limited | Hospitality | 2017 |
| Billy Barber Ltd | Other services | 2025 |
| Billy Gadd Ltd | Information & communication | 2025 |
| Billy Store Ltd | Wholesale & retail | 2025 |
| Billy's Insulation Ltd | Construction | 2024 |
| Billybargins Ltd | Wholesale & retail | 2023 |
| Billycissy Ltd | Health & social care | 2021 |
| Billz Ltd | Other services | 2025 |
| Billz Travel & Services Limited | Transport & logistics | 2025 |
| Bilnaz Ltd | Health & social care | 2024 |
| Bilril Estates Limited | Construction | 1952 |
| Bilston Food Limited | Hospitality | 2022 |
| Bilston Motors Ltd | Wholesale & retail | 2022 |
| Bilston Rentals Ltd | Hospitality | 2018 |
| Bilston Support Network CIC | Hospitality | 2022 |
| Bilston Town Community Football Club Limited | Arts & recreation | 2013 |
| Bilston Vape Stop Limited | Wholesale & retail | 2023 |
| Bilton Grange Road Management Company Limited | Households | 2006 |
| Bilwani Trading Company Limited | Wholesale & retail | 2023 |
| BIM & Architectural Design Ltd | Professional & scientific | 2021 |
| BIM Applications Limited | Information & communication | 2012 |
| Bimal Retails Ltd | Wholesale & retail | 2024 |
| Bimcad Technology Limited | Other services | 2018 |
| Bimdam Limited | Health & social care | 2021 |
| Bimduct Ltd | Professional & scientific | 2021 |
| Bimim Materials Limited | Manufacturing | 2023 |
| Bimlabexs Ltd | Hospitality | 2026 |
| Bimtek U.K Ltd | Professional & scientific | 2019 |
| Bimy Ltd | Other services | 2022 |
| Bimza Limited | Wholesale & retail | 2014 |
| Bimza Motors Ltd | Wholesale & retail | 2022 |
| BIN Azhar Ltd | Wholesale & retail | 2025 |