| Barnfather Holdings Limited | Manufacturing | 2001 |
| Barnfather Wire (Midlands) Limited | Manufacturing | 2007 |
| Barnfather Wire Limited | Manufacturing | 2009 |
| Baron&Co Cleaning Services Ltd | Administrative & support | 2025 |
| Barrett & Associates Ltd | Other services | 2017 |
| Bassan Investments Limited | Real estate | 2025 |
| Batory Services Ltd | Transport & logistics | 2023 |
| Bawa Transport Ltd | Transport & logistics | 2023 |
| Bayard Bikes Limited | Wholesale & retail | 2025 |
| Bayliss Roofing & Cladding Ltd | Construction | 2024 |
| BDS Midlands Ltd | Wholesale & retail | 2021 |
| Bdsj Transport Ltd | Transport & logistics | 2019 |
| Bearmore Ltd | Wholesale & retail | 2016 |
| Bearwood Foot Surgery Limited | Health & social care | 2017 |
| Beauty Box Boutique Ltd | Wholesale & retail | 2020 |
| Beauty by Jules Ltd | Wholesale & retail | 2025 |
| Beckett West Ltd | Wholesale & retail | 2016 |
| Beckon Creative Transformation Solutions Ltd | Professional & scientific | 2022 |
| BED4U Limited | Wholesale & retail | 2023 |
| Beechwood Car Sales Limited | Wholesale & retail | 2006 |
| Beemer Werks Limited | Wholesale & retail | 2026 |
| Beer DOC & Fridgemon Ltd | Other services | 2019 |
| Bell Ultimate Services Ltd | Administrative & support | 2016 |
| Belmonte Estates Ltd | Real estate | 2022 |
| BEN Clarke Garden Maintenance Ltd | Administrative & support | 2026 |
| BEN Wilkes Limited | Construction | 2023 |
| Bengal Engineering Ltd | Wholesale & retail | 2021 |
| Bengal Foods Walsall Ltd | Hospitality | 2025 |
| Bengal Welding Limited | Manufacturing | 2024 |
| Benson Group Ltd | Financial services | 2026 |
| Bespoke Kitchens and Bedrooms by Butlers Direct Ltd | Manufacturing | 2020 |
| Best Hire Ltd | Transport & logistics | 2024 |
| Best Hired Limited | Transport & logistics | 2026 |
| Best of Rover Spares Limited | Wholesale & retail | 2009 |
| BET Driving Services Ltd | Transport & logistics | 2024 |
| Better Range Physiotherapy Ltd | Other services | 2024 |
| Bezzanique Designs Limited | Wholesale & retail | 2011 |
| BG84 Limited | Real estate | 2019 |
| BGN Midland Ltd | Manufacturing | 2025 |
| BGR Catering Ltd | Hospitality | 2023 |
| Bifolddoorcompanyuk.Co.Uk Limited | Manufacturing | 2017 |
| Big Future Limited | Professional & scientific | 2003 |
| Big MO Bodywork & Repairs Ltd | Wholesale & retail | 2021 |
| Biggs Clutch Repair Centre and Service Limited | Wholesale & retail | 2020 |
| Bigren Vitage Ltd | Wholesale & retail | 2025 |
| BIJ Global Ltd | Wholesale & retail | 2026 |
| Bills Housing Limited | Real estate | 2025 |
| Bilporttd Ltd | Real estate | 2025 |
| Bilston Properties Limited | Administrative & support | 1984 |
| Bimmerunlocked Ltd | Wholesale & retail | 2026 |
| Birch Holdings Limited | Professional & scientific | 2016 |
| Birch Street Construction Limited | Construction | 2016 |
| Birmingham Coldform & Special Fasteners Limited | Manufacturing | 1988 |
| Birmingham Electricians Ltd | Construction | 2018 |
| Birmingham Parking Services Limited | Other services | 2019 |
| Birmingham Patient Transfers Ltd | Transport & logistics | 2026 |
| Birminghambnbs Ltd | Real estate | 2019 |
| Bisbell Magnetic Products Limited | Manufacturing | 1971 |
| Bison Consult Ltd | Professional & scientific | 2023 |
| Bittaye Ltd | Wholesale & retail | 2024 |
| Bizzy BEE Transport Ltd | Transport & logistics | 2021 |
| BJS Allmyit Limited | Administrative & support | 2023 |
| BJS Boxworks.It Ltd | Information & communication | 2022 |
| BJS Construct IT Haulage Limited | Transport & logistics | 2020 |
| BJS Couriers Ltd | Transport & logistics | 2021 |
| BJS Distribution Property Ltd | Real estate | 2022 |
| BJS Distribution Storage and Couriers Limited | Transport & logistics | 2009 |
| BJS Haulage Limited | Transport & logistics | 2020 |
| BJS Heritage and Education Trust Limited | Education | 2025 |
| BJS Home Deliveries Limited | Transport & logistics | 2015 |
| BJS Home Delivery Ltd | Transport & logistics | 2017 |
| BJS Manufacturing UK Limited | Manufacturing | 2024 |
| BJS Storage Ltd | Transport & logistics | 2021 |
| BJS Vehicle Rental Limited | Administrative & support | 2016 |
| Bjs-Extra Ltd | Transport & logistics | 2020 |
| Black Country Barbershop Ltd | Other services | 2011 |
| Black Country Boxing Academy C.I.C. | Arts & recreation | 2020 |
| Black Country Campers Ltd | Wholesale & retail | 2026 |
| Black Country Cladding Ltd | Construction | 2019 |
| Black Country Electrical Supplies Ltd | Manufacturing | 2021 |
| Black Country Home Improvements Ltd | Construction | 2019 |
| Black Country Property Maintenance Ltd | Administrative & support | 2017 |
| Black Country RAW Limited | Manufacturing | 2023 |
| Black Country Resin Ltd | Construction | 2025 |
| Black Country Steel Erection Ltd | Construction | 2019 |
| Black Lake Kitchens Limited | Manufacturing | 2014 |
| Black Pounds Matter Ltd | Extraterritorial | 2020 |
| Black Vouchers Ltd | Wholesale & retail | 2020 |
| Blackburns Metals Limited | Wholesale & retail | 2003 |
| Blacks Elite Construction Ltd | Construction | 2025 |
| Blackstone Commercial Consultants Ltd | Professional & scientific | 2022 |
| Blackthorne Plumbing Ltd | Construction | 2024 |
| BLK Services Ltd | Professional & scientific | 2024 |
| Blondies [WM] Ltd | Other services | 2022 |
| Blossom Social Care Limited | Hospitality | 2022 |
| Blue Card NVQ Ltd | Education | 2022 |
| Blue Monsoon Limited | Construction | 2025 |
| Blue Mountain Business Services Ltd | Hospitality | 2019 |
| Blue Skies Healthcare Limited | Administrative & support | 2021 |
| Bluebell Parking Ltd | Transport & logistics | 2023 |