| BDOX15 Limited | Health & social care | 2015 |
| BDR Brickwork Limited | Construction | 2021 |
| BDV Clean Limited | Administrative & support | 2023 |
| BE Ahead Ltd | Professional & scientific | 2016 |
| Beacon Painting and Decorating Company Limited | Construction | 1979 |
| Beacon Reach (Hope Cove) Limited | Households | 1991 |
| Bealaw (MAN) 24 Limited | Financial services | 2006 |
| Beautique 2017 Limited | Other services | 2018 |
| Beauty and Beauty Services Limited | Administrative & support | 2026 |
| Beauty Birdies Ltd | Health & social care | 2022 |
| Beauty Boutique Lounge Limited | Other services | 2024 |
| Beauty Care Supplies Limited | Wholesale & retail | 1988 |
| Beauty Concept UK Ltd | Other services | 2023 |
| Beautybirdies Homes Ltd | Real estate | 2024 |
| Beautyfields Limited | Other services | 2013 |
| Beauté Bohème Ltd | Other services | 2025 |
| Beck Plumbing and Heating Limited | Construction | 2019 |
| Beckford Social Work Ltd | Health & social care | 2016 |
| Bedbay Properties Limited | Real estate | 2025 |
| Beech's Car and Commercial Ltd | Wholesale & retail | 2020 |
| Beer on the Move Limited | Hospitality | 2018 |
| BEI (UK) Group Ltd | Construction | 2015 |
| Belka Properties Limited | Real estate | 2025 |
| Belle Beauty - Dudley Ltd | Other services | 2025 |
| Belles Jewellery Box Ltd | Wholesale & retail | 2018 |
| Belleview (UK) Limited | Construction | 2007 |
| Beltviews Ltd | Wholesale & retail | 2019 |
| Belvedere Residence Limited | Households | 2018 |
| BEN Carless Limited | Professional & scientific | 2019 |
| BEN Smallman PR Limited | Professional & scientific | 2021 |
| Bengal Flame Gornal Limited | Hospitality | 2025 |
| Beniamins Ltd | Construction | 2018 |
| Bennettfit Reform Ltd | Arts & recreation | 2025 |
| Benshee Property Ltd | Professional & scientific | 2024 |
| Berrow Property Limited | Extraterritorial | 2015 |
| Bespoke Corp Ltd | Wholesale & retail | 2024 |
| Bespoke Crafted Kitchens Ltd | Construction | 2024 |
| Bespoke Interiors Sedgley Ltd | Wholesale & retail | 2024 |
| Besso Properties Ltd | Real estate | 2022 |
| Best Auto Market Ltd | Wholesale & retail | 2020 |
| Best Logistic Ltd | Transport & logistics | 2017 |
| Best Price Mini Supermarket Ltd | Wholesale & retail | 2024 |
| Best Roofing Holdings and Investments Ltd | Financial services | 2026 |
| Best Roofing Services Limited | Construction | 2014 |
| Bestcare Plus Services Ltd | Health & social care | 2025 |
| Beste Bureau Ltd | Wholesale & retail | 2025 |
| Bestkooling Refrigeration Ltd | Manufacturing | 2020 |
| Beta Ballvalves Limited | Extraterritorial | 1985 |
| Bethel Medic Ltd | Health & social care | 2020 |
| Betholm 316 Ltd | Wholesale & retail | 2025 |
| Betta Profiles (Dudley) Limited | Manufacturing | 2010 |
| BETTERM2M Ltd | Information & communication | 2019 |
| Bewdley Grab Hire Limited | Administrative & support | 2017 |
| Bewdley Plant and Grab Hire Limited | Administrative & support | 2017 |
| Bexs Home Care Ltd | Other services | 2022 |
| Beyond Labels Ltd | Information & communication | 2025 |
| Bgkilmurray Ltd | Wholesale & retail | 2024 |
| Bhella Properties LLP | | 2025 |
| BHK Glasshouse Systems Ltd | Construction | 2023 |
| Bhussain Ltd | Wholesale & retail | 2024 |
| Bibsvapes Ltd | Wholesale & retail | 2023 |
| Bidie Medics Ltd | Health & social care | 2025 |
| Bifold Door Systems Ltd | Manufacturing | 2024 |
| Big Baba Limited | Wholesale & retail | 2023 |
| Bigg Corporation Ltd | Real estate | 2022 |
| Bigg Property Solutions Ltd | Construction | 2022 |
| Bigman Desserts Ltd | Hospitality | 2025 |
| Bigteam Security Ltd | Administrative & support | 2024 |
| Bihizi Ltd | Information & communication | 2025 |
| Bill General Store Ltd | Wholesale & retail | 2015 |
| Bill Quay Productions Ltd | Manufacturing | 2025 |
| Billy Bunter's Bakehouse Limited | Wholesale & retail | 2008 |
| BIN TAJ Ltd | Wholesale & retail | 2025 |
| Biohazard Clean 365 Days Ltd | Administrative & support | 2025 |
| Birch Hollow Properties Ltd | Real estate | 2018 |
| Birchfield Engineering Limited | Professional & scientific | 1996 |
| Birchfield Housing Ltd | Real estate | 2025 |
| Birchfields (Tipton) Management Company Limited | Households | 2005 |
| Birmingham Ambulance & Mobility Transport Ltd | Transport & logistics | 1990 |
| Birmingham Roofing Supplies Limited | Construction | 2007 |
| Bishopstone Ltd | Real estate | 2010 |
| Bison Screeds Ltd | Construction | 2025 |
| Bitapharma Limited | Wholesale & retail | 2026 |
| Bizbaybazar Ltd | Wholesale & retail | 2023 |
| BJ Properties Limited | Construction | 2002 |
| BJL Designs Limited | Professional & scientific | 2013 |
| BJM Promotions Ltd | Arts & recreation | 2021 |
| BK Freight Services Ltd | Transport & logistics | 2025 |
| BKM Developments Ltd | Construction | 2025 |
| BKM Holdings & Investments Ltd | Financial services | 2025 |
| BKM Land & Acquisitions Ltd | Construction | 2025 |
| Black ADA Limited | Agriculture & fishing | 2002 |
| Black Country and Shropshire Builders Ltd | Construction | 2026 |
| Black Country Audio Limited | Administrative & support | 2010 |
| Black Country Auto Centre Ltd | Wholesale & retail | 2025 |
| Black Country Business Ltd | Administrative & support | 2012 |
| Black Country Carpentry Limited | Construction | 2007 |
| Black Country Construction Services Ltd | Construction | 2020 |
| Black Country Crafts Ltd | Wholesale & retail | 2020 |
| Black Country Driving Academy Limited | Education | 2022 |