| Backup-Doctor Limited | Information & communication | 2006 |
| BAD BOY Vintage Ltd | Wholesale & retail | 2025 |
| Badda Group Ltd | Other services | 2024 |
| Badgeman Limited | Administrative & support | 2004 |
| Badgu Care Ltd | Health & social care | 2020 |
| Badpayers.Co.Uk Ltd | Wholesale & retail | 2023 |
| Bagdi Properties Limited | Real estate | 2010 |
| Baggott & Baggott Ltd | Extraterritorial | 2015 |
| Bagi Convenience Stores Limited | Wholesale & retail | 2023 |
| Bagi Convenience UK Limited | Wholesale & retail | 2023 |
| Bagri Wines Limited | Wholesale & retail | 2016 |
| Bagsd Trading Limited | Other services | 2012 |
| BAH Transporters Limited | Transport & logistics | 2022 |
| Bahia Estates UK Ltd | Real estate | 2012 |
| Bahia Property Group Limited | Real estate | 2024 |
| Bahia Superstores Limited | Wholesale & retail | 2003 |
| Bainbridge BIO Ltd | Manufacturing | 2023 |
| Baines Holdings Limited | Professional & scientific | 2015 |
| Baines Wealth Ltd | Financial services | 2015 |
| Bains & Sons Construction Ltd | Construction | 2020 |
| Bains Eyecare Limited | Real estate | 2012 |
| Bains EYECARE2 Limited | Real estate | 2025 |
| Bains Property Investments Ltd | Real estate | 2017 |
| Bajwa & SON Construction Limited | Construction | 2017 |
| Bajwa Properties Limited | Real estate | 2007 |
| Bakeaway Catering Limited | Manufacturing | 2016 |
| Baked by Jayne Limited | Manufacturing | 2025 |
| Baked in Brick Ltd | Hospitality | 2015 |
| Baker-Buick Limited | Professional & scientific | 2008 |
| Bakers Sandwich Bar (Walsall) Ltd | Hospitality | 2024 |
| Bakery One & Co. Ltd | Hospitality | 2020 |
| Bakewell Associates Ltd | Professional & scientific | 2024 |
| Bakshi and SON Ltd | Professional & scientific | 2010 |
| BAL & BAL Properties Limited | Real estate | 2024 |
| Bala Brothers Realty Ltd | Real estate | 2025 |
| Balaji Express Limited | Transport & logistics | 2024 |
| Balancepro Accountancy Services Limited | Professional & scientific | 2017 |
| Balazs Courier Services Limited | Transport & logistics | 2019 |
| Baldwin Knight Holdings Limited | Real estate | 2022 |
| Baldwins Property Holdings Limited | Real estate | 2015 |
| Balkan Cured Ltd | Manufacturing | 2026 |
| Balkar Transport Limited | Transport & logistics | 2025 |
| Ball Electrical Services Limited | Construction | 2023 |
| Ball Plastering and Partitioning Ltd | Construction | 2025 |
| Balmoral Trading Co Ltd | Hospitality | 2026 |
| Balquisbakes Ltd | Manufacturing | 2025 |
| Baltic Mini Market Walsall Ltd | Wholesale & retail | 2023 |
| BAM - AB Ltd | Other services | 2020 |
| BAM Foods Ltd | Hospitality | 2025 |
| Bam-Bb Ltd | Other services | 2023 |
| Bamat Global Resources Ltd | Administrative & support | 2011 |
| Bambino Nanny Services Limited | Health & social care | 2025 |
| Bambury Store UK Limited | Wholesale & retail | 2008 |
| Bamf Ltd | Real estate | 2023 |
| Bamo-Ja Ltd | Wholesale & retail | 2025 |
| Bamot Services Ltd | Administrative & support | 2020 |
| Banaras Holding Co Limited | Real estate | 2017 |
| Banbl Limited | Professional & scientific | 2021 |
| Banex Logistics Limited | Transport & logistics | 2021 |
| Banfates Fleet Management Limited | Professional & scientific | 2024 |
| Banfora Trading Ltd | Construction | 2025 |
| Bann (Holdings) Limited | Wholesale & retail | 2016 |
| Bann Investments Limited | Real estate | 2021 |
| BAO GAS and Heating Limited Limited | Construction | 2021 |
| BAO Living Healthcare Limited | Health & social care | 2017 |
| Baoshii Ltd | Wholesale & retail | 2023 |
| Bapex Limited | Professional & scientific | 2022 |
| Barakah VENTURES2 Ltd | Wholesale & retail | 2026 |
| Barakahprints Ltd | Wholesale & retail | 2024 |
| Barbeku Limited | Hospitality | 2019 |
| Barber's Choice Limited | Other services | 2023 |
| Barberhost Ltd | Information & communication | 2025 |
| Barda IT Services Ltd | Information & communication | 2022 |
| Barecode Limited | Information & communication | 2018 |
| Bargain Empire Limited | Wholesale & retail | 2018 |
| Bargain World Walsall Ltd | Wholesale & retail | 2025 |
| Bargotta Holdings Limited | Real estate | 2025 |
| Barhale Construction Services Limited | Construction | 1984 |
| Barhale Holdings PLC | Construction | 2017 |
| Barhale Limited | Construction | 1976 |
| Barhale Overseas Limited | Construction | 2007 |
| Barhale Properties Limited | Construction | 1987 |
| Barhale Rail Limited | Construction | 1982 |
| Barhale Resource Solutions Limited | Administrative & support | 2011 |
| Barhale Response Ltd. | Construction | 1984 |
| Barhale Telecoms Limited | Construction | 1989 |
| Barka Stores Ltd | Wholesale & retail | 2023 |
| Barkat Barkat Ltd | Construction | 2017 |
| Barker Bins Ltd | Water & waste | 2026 |
| Barker Group Birmingham Limited | Water & waste | 2025 |
| Barnett Bodyshop Supplies Limited | Wholesale & retail | 2013 |
| Barney Transport Ltd | Transport & logistics | 2026 |
| Barneybee Ltd | Wholesale & retail | 2024 |
| Barr Common Trading Co Limited(The) | Real estate | 1960 |
| Barrett Childrens Social Care Solutions Limited | Health & social care | 2015 |
| Barrett Steam Models Limited | Professional & scientific | 2013 |
| Barrett's Fruiterers Limited | Wholesale & retail | 2018 |
| Barretts Contractors Ltd. | Construction | 2002 |
| Barrier Concepts Limited | Extraterritorial | 2011 |
| Barrington Smith Financial Ltd | Financial services | 2011 |