| Blackberry Barns Management Limited | Households | 2026 |
| Blackbooks Accountancy Limited | Professional & scientific | 2004 |
| Blackford Properties Ltd | Real estate | 2023 |
| Blacksmith's Muay Thai Academy CIC | Education | 2023 |
| Blackstar Wealth Management a Ltd | Financial services | 2009 |
| Blackstone Inc Limited | Professional & scientific | 2024 |
| Blackstone Vehicle Transport Ltd | Transport & logistics | 2026 |
| Blacktapestudios Limited | Professional & scientific | 2014 |
| Blackthorneboys Limited | Hospitality | 2025 |
| Blackwood Properties (Streetly) Limited | Real estate | 2004 |
| Blade & Faith Limited | Professional & scientific | 2013 |
| Blades WM Ltd | Administrative & support | 2018 |
| Blaisdon Developments Limited | Real estate | 2014 |
| Blake's Residential Services Ltd | Public administration | 2020 |
| Blakenall MM Ltd | Wholesale & retail | 2025 |
| Blank Space Property Solutions Limited | Real estate | 2023 |
| Blast & Prep Limited | Wholesale & retail | 2026 |
| Blast and Ballistics Ltd | Administrative & support | 2011 |
| Blaythorn Gardens Limited | Administrative & support | 2016 |
| Blazin Bonnets Ltd | Wholesale & retail | 2025 |
| Blessed 2 Bless Community Project | Education | 2015 |
| Blessed Alliance Care Services Ltd | Administrative & support | 2025 |
| Blessed With Luxury Ltd | Manufacturing | 2025 |
| Blesshall Limited | Professional & scientific | 1994 |
| Blinds Local Limited | Manufacturing | 2018 |
| Blinds Specialist Ltd | Wholesale & retail | 2021 |
| Blindzu Ltd | Wholesale & retail | 2026 |
| Blinford Graphics Limited | Manufacturing | 1985 |
| Bliss Logistics Limited | Transport & logistics | 2025 |
| Blisworth Marina Ltd | Hospitality | 2020 |
| Bloc International Limited | Arts & recreation | 2023 |
| Bloc-Lite Limited | Transport & logistics | 1963 |
| Blocksil Ltd | Manufacturing | 2012 |
| Blood, Sweat and Tea Productions Ltd | Arts & recreation | 2020 |
| Bloom Beauty Lounge Ltd | Other services | 2022 |
| Bloomsberry Homes Limited | Real estate | 2021 |
| Bloomsbury MD Limited | Health & social care | 2014 |
| Blossom Boutique (Midlands) Ltd | Wholesale & retail | 2024 |
| Blossoms Day Nurseries (Great Barr) Ltd | Health & social care | 2015 |
| Blossoms Day Nursery Cannock Ltd | Health & social care | 2019 |
| Bloxwich 126 Limited | Hospitality | 2025 |
| Bloxwich Convenience Store Ltd | Wholesale & retail | 2020 |
| Bloxwich Fencing Limited | Construction | 2008 |
| Bloxwich Golf Club (1988) Limited | Arts & recreation | 1988 |
| Bloxwich Golf Club Limited(The) | Professional & scientific | 1924 |
| Bloxwich Metal Finishing Co. Limited | Manufacturing | 1981 |
| Bloxwich Mini Market Ltd | Wholesale & retail | 2024 |
| Bloxwich Plumbers Ltd | Construction | 2025 |
| Bloxwich Properties Limited | Real estate | 2014 |
| Bloxwich Resprays Ltd | Wholesale & retail | 2016 |
| Bloxwich Tandoor Limited | Hospitality | 2025 |
| Bloxwich Tyres Limited | Wholesale & retail | 2018 |
| Bloxwich Windows Limited | Construction | 2005 |
| BLP Properties Limited | Real estate | 2016 |
| Blsmodz Ltd | Wholesale & retail | 2024 |
| Blue Brick Construction Ltd | Construction | 2012 |
| Blue Bulldog Ltd | Construction | 2021 |
| Blue Cloud Estates Limited | Real estate | 2022 |
| Blue CLP Ltd | Real estate | 2024 |
| Blue Coat Church of England Academy (Walsall) Trust | Education | 2012 |
| Blue Crab Animals CIC | Education | 2025 |
| Blue Dawn Studios Limited | Arts & recreation | 2018 |
| Blue Dream Investments Limited | Real estate | 2022 |
| Blue Flag Care Limited | Administrative & support | 2025 |
| Blue Flint Civil Engineering Ltd | Construction | 2026 |
| Blue Frame FM Ltd | Construction | 2026 |
| Blue Horse Investment Services Ltd | Real estate | 2022 |
| Blue Horse Retail Limited | Wholesale & retail | 2018 |
| Blue Mango Group Limited | Hospitality | 2019 |
| Blue Panther Holdings Ltd | Financial services | 2026 |
| Blue Property FM Ltd | Real estate | 2026 |
| Blue Sky Services Ltd | Administrative & support | 2025 |
| Blue Summit Limited | Other services | 2017 |
| Blue Wolf Investments Ltd | Financial services | 2026 |
| Blue X Ltd | Construction | 2020 |
| Blueatlan Limited | Transport & logistics | 2022 |
| Bluebell Accountancy Services Ltd | Professional & scientific | 2021 |
| Blueceylon Ltd | Wholesale & retail | 2019 |
| Bluegate Developments Ltd | Real estate | 2026 |
| Bluegates Homes Ltd | Real estate | 2023 |
| Bluelight EAR Ltd | Administrative & support | 2024 |
| Bluelightlifestyle Ltd | Administrative & support | 2022 |
| Blueline Resources Limited | Health & social care | 2022 |
| Blueoaks Consultants Ltd | Information & communication | 2025 |
| Blueoaks Property Ltd | Real estate | 2026 |
| Blueprint Associates Ltd | Professional & scientific | 2013 |
| BLUEPRINT360 Ltd | Professional & scientific | 2025 |
| Bluerelay Solutions Ltd | Information & communication | 2024 |
| Blueridge Capital Limited | Real estate | 2023 |
| Bluerock Civils Limited | Construction | 2019 |
| Blusang-Uk Limited | Construction | 2017 |
| Blush & Bloom Studio Limited | Other services | 2026 |
| Bluuprint CIC | Education | 2023 |
| Bluwood Design & Build Limited | Construction | 2018 |
| Blwhair Ltd | Other services | 2025 |
| BM Care Investment Group Ltd | Real estate | 2025 |
| BM Home Improvements Limited | Construction | 2018 |
| Bmafragrances Ltd | Wholesale & retail | 2023 |
| BMC Apra Transport Limited | Transport & logistics | 2018 |
| Bmfb Limited | Manufacturing | 2022 |