| Bathams (Delph) Limited | Manufacturing | 1980 |
| Bauplantec Limited | Administrative & support | 2004 |
| Baydonian Limited | Wholesale & retail | 1974 |
| Baynell Limited | Wholesale & retail | 1939 |
| BBC Panel Birmingham Limited | Construction | 2023 |
| Bcti Holdings Limited | Hospitality | 2002 |
| BD Pyro Limited | Extraterritorial | 2007 |
| BE at One Trading Limited | Hospitality | 2025 |
| BE Inspired by Nicky-Luxury Travel Ltd | Administrative & support | 2025 |
| BEA Landscape Design Limited | Administrative & support | 2003 |
| Beaco Construction Limited | Construction | 1988 |
| Beacon Centre for the Blind | Health & social care | 1961 |
| Beacon Manufacturing Co. (1982) Limited | | 1983 |
| Beacon Milking Systems Limited | | 1983 |
| Beacon Pipework & Welding Services (South West) Limited | | 1983 |
| Beaconsfield Management Company (Malvern) Limited | Households | 2006 |
| Beadcourt Limited | Real estate | 1987 |
| Beamsafe Limited | Real estate | 1989 |
| Bearing MAN Limited | Wholesale & retail | 1989 |
| Beartennis Ventures Limited | Financial services | 2023 |
| Beaumont Grove Management Co. (Solihull) Limited | Extraterritorial | 1998 |
| Beauty First (Dosanjh) Limited | Other services | 2005 |
| Beautyrx Co., Ltd | Wholesale & retail | 2023 |
| Becks Exhibitions Limited | Administrative & support | 2001 |
| Beddard Engineering Services Limited | Professional & scientific | 2002 |
| Bede Holding Company Limited | Professional & scientific | 2001 |
| BEE Hand Carwash Ltd | Wholesale & retail | 2026 |
| Beeches Mews Management Limited | Households | 2000 |
| Beili Co., Ltd | Wholesale & retail | 2023 |
| Belfor UK Limited | Administrative & support | 1978 |
| Belken Limited | Construction | 1999 |
| Bella Property Developments Limited | Real estate | 2004 |
| Bench Design and Build Limited | Construction | 2007 |
| Bennett Landscapes & Maintenance Ltd | Administrative & support | 2003 |
| Bennett Williams Partnership (Midlands) Limited | Professional & scientific | 1991 |
| Bens Fish Bar Limited | Hospitality | 2004 |
| Bentensh Co., Ltd | Wholesale & retail | 2023 |
| Berachah-Faith Ministries | Arts & recreation | 2005 |
| Berkeley House Management Company Limited | Real estate | 1987 |
| Berkeley Stephens Limited | Professional & scientific | 2006 |
| Beronhurst Limited | | 1985 |
| Bestway Furnishing Co., Ltd | Manufacturing | 2023 |
| Beswicks Stafford (2) Limited | Professional & scientific | 2002 |
| Beta Heat Treatment Limited | Manufacturing | 1987 |
| BFA Finance and Accountancy Ltd | Administrative & support | 2004 |
| BFB (Caterers) Limited | Hospitality | 2004 |
| BG Dental Care Ltd | Health & social care | 2026 |
| Bharat Investments Limited | Real estate | 1999 |
| Bhatia & Co Ltd | Professional & scientific | 2002 |
| Bhogal & Co Limited | Wholesale & retail | 2006 |
| Bickford Building Services (Solihull) Limited | Construction | 1997 |
| BID Services | Health & social care | 1995 |
| Big Heat Treatment Limited | Professional & scientific | 2003 |
| Biokil Crown Guarantees Limited | Professional & scientific | 2003 |
| Biokil Crown Limited | Construction | 2000 |
| Birmal Components Limited | Professional & scientific | 1903 |
| Birmingham Autobreak Recycling Limited | Wholesale & retail | 2008 |
| Birmingham CAB Company Limited | Wholesale & retail | 2000 |
| Birmingham Conference Centre Limited | Professional & scientific | 2007 |
| Birmingham GUN Barrel Company, Limited(The) | Manufacturing | 1953 |
| Bishop Engineering Limited | Manufacturing | 2000 |
| Bissell & Brown Ltd | Professional & scientific | 2000 |
| Bissell & Brown Midlands Ltd | Professional & scientific | 2010 |
| Bitech Training Limited | Administrative & support | 1997 |
| Bitstar Invest Limited | Information & communication | 2024 |
| Biydirect.Com Limited | Extraterritorial | 2000 |
| BK Ingenieurbuero Fuer Kraftfahrzeuge Limited | Administrative & support | 2005 |
| BK Birmingham Ltd | Wholesale & retail | 2021 |
| Black and White Discount Stationers (Midlands) Limited | Transport & logistics | 1992 |
| Black Chip Limited | Professional & scientific | 2004 |
| Black Country Binding Ltd | Manufacturing | 2007 |
| Black Country Brewery Limited | Manufacturing | 2003 |
| Black Country Care Services Limited | Health & social care | 2003 |
| Black Country Glazing Limited | Construction | 1996 |
| Black Country Living Museum Enterprises Limited | Wholesale & retail | 1995 |
| Black Country Pets Limited | Professional & scientific | 2023 |
| Black Country Self Storage Ltd | Transport & logistics | 2006 |
| Black Country Skip Hire Limited | Water & waste | 2003 |
| Black Rabbit Park Limited | Manufacturing | 2023 |
| Blackheath (Midlands) Trading Limited | Real estate | 1978 |
| Blackheath Group Limited | Financial services | 1933 |
| Blackheath Products Limited | Wholesale & retail | 1958 |
| Blackridge Consultants Limited | Information & communication | 1996 |
| Blade Hair & Beauty Limited | Other services | 2006 |
| Blakemore Design & Shopfitting Ltd | Construction | 1989 |
| Blakemore Food Service Limited | Professional & scientific | 1986 |
| Blakes Sheds & Fencing Limited | Manufacturing | 2001 |
| Blaze (UK) Thermal Technology Co., Ltd | Manufacturing | 2023 |
| Blue Car Consultancy Limited | Professional & scientific | 2000 |
| Blue Door Property Lettings Limited | Real estate | 2002 |
| Blue Lake Consulting Limited | Information & communication | 2006 |
| Blue Ocean Beauty UK Group Limited | Wholesale & retail | 2023 |
| Blue Water Fishing Limited | Agriculture & fishing | 1997 |
| Bluestripe Remanufacturing Limited | Wholesale & retail | 1993 |
| BM Bedwell Properties Ltd | Real estate | 2022 |
| BOB Hunter Optometry Limited | Health & social care | 2007 |
| Boden Gardens Property Management Limited | Households | 2007 |
| Bodybag International Ltd | Other services | 2001 |
| Boldmere Designs Limited | Professional & scientific | 1997 |
| BON BON (Birmingham) Limited | Wholesale & retail | 2007 |