| BAG IT UP Limited | Water & waste | 2007 |
| Bailey and Blake Property Solutions Limited | Households | 2025 |
| Bains Couriers Ltd | Transport & logistics | 2025 |
| Balbir Singh Madahar Ltd | Extraterritorial | 2024 |
| Bangaroute Ltd | Transport & logistics | 2025 |
| Bangworks Limited | Transport & logistics | 2019 |
| Bantu Haven Community Interest Company | Health & social care | 2021 |
| Barton Group Holding Ltd | Financial services | 2021 |
| Barton Storage Systems Limited | Professional & scientific | 2003 |
| Bathroom Boutique Scotland Ltd | Wholesale & retail | 2017 |
| Batth Holdings Limited | Real estate | 2023 |
| Bavelle Holdings PTY Ltd | Construction | 2025 |
| Bayt Al-Tawakkul Ltd | Wholesale & retail | 2026 |
| Baywater International Ltd | Wholesale & retail | 2023 |
| Bcbi Holdings Limited | Professional & scientific | 2022 |
| BCU UK Trust Ltd. | Education | 2011 |
| BD Cleaning Services Ltd | Administrative & support | 2019 |
| BDI Trans Ltd | Transport & logistics | 2016 |
| Beauty and the Button Limited | Wholesale & retail | 2020 |
| Beauty DOT Distribution Ltd | Wholesale & retail | 2025 |
| Beauty DOT Ltd | Wholesale & retail | 2025 |
| Becker Bidco Limited | Financial services | 2021 |
| BECKS247 Cleaning Services Limited | Administrative & support | 2017 |
| Becky's Airbrushing Limited | Construction | 2022 |
| Beegold Jewellery Ltd | Wholesale & retail | 2023 |
| Behind Small Eyes Ltd | Wholesale & retail | 2025 |
| Believe Construction Limited | Construction | 2023 |
| Bellingham and Sons Limited | Administrative & support | 2013 |
| Bency Limited | Health & social care | 2012 |
| Bency Property Limited | Real estate | 2019 |
| Bengitsprkz Ltd | Transport & logistics | 2025 |
| Bennett's Cafe Ltd | Hospitality | 2024 |
| Bens Traders Limited | Transport & logistics | 2011 |
| Bess Care Ltd | Health & social care | 2009 |
| Best Feet Forward Ltd | Health & social care | 2024 |
| Best LAY Flooring Ltd | Construction | 2024 |
| Bestshop Limited | Wholesale & retail | 2025 |
| Beth Care Limited | Health & social care | 2024 |
| Better Choice Better Life Ltd | Education | 2025 |
| Bhandal OFF Licence Ltd | Wholesale & retail | 2022 |
| Bhangu Logistics UK Ltd | Transport & logistics | 2020 |
| Bhangu Real Estate Ltd | Real estate | 2024 |
| Bhangu Transport Ltd | Transport & logistics | 2013 |
| Bhavish Ltd | Wholesale & retail | 2018 |
| Bhella Consultancy Limited | Construction | 2018 |
| Bhella Limited | Transport & logistics | 2025 |
| Bikaner Sweet & Restaurant Ltd | Wholesale & retail | 2024 |
| Bilston Balti (WM) Ltd | Hospitality | 2023 |
| Bilston Bathrooms Ltd | Construction | 2022 |
| Bilston BID Ltd | Administrative & support | 2015 |
| Bilston Built-Up Roofing Limited | Professional & scientific | 1980 |
| Bilston Car Sales Limited | Wholesale & retail | 2025 |
| Bilston Creative Services Ltd | Professional & scientific | 2014 |
| Bilston Fish Bar Limited | Hospitality | 2016 |
| Bilston House Ltd | Hospitality | 2025 |
| Bilston Neighbourhood Church | Other services | 1999 |
| Bilston News (UK) Ltd | Wholesale & retail | 2011 |
| Bilston Plumbing & Timber Ltd | Wholesale & retail | 2023 |
| Bilston Quick Stop Ltd | Wholesale & retail | 2025 |
| Bilston Resource Centre | Education | 1999 |
| Bilston Skip Hire Limited | Professional & scientific | 1953 |
| Bilston Urban Recycling Ltd | Real estate | 2023 |
| BIR Clothing Limited | Wholesale & retail | 2025 |
| Birmingham Cleaning Specialists Ltd | Administrative & support | 2022 |
| BIS Auto Bodyworks Ltd | Wholesale & retail | 2026 |
| BJM Property Enterprises Limited | Real estate | 2023 |
| Bkathycorp Ltd | Administrative & support | 2021 |
| Black Country Academy Limited | Education | 2020 |
| Black Country Auctions Ltd | Administrative & support | 2023 |
| Black Country FOG Ltd | Wholesale & retail | 2020 |
| Black Country Grab Limited | Water & waste | 2019 |
| Black Country Pins Limited | Manufacturing | 1993 |
| Black Country Property Services Ltd | Construction | 2025 |
| Black Country Tank Installers Ltd | Construction | 2026 |
| Black Heritage Solutions Ltd | Professional & scientific | 2024 |
| BLC Travel Ltd | Transport & logistics | 2026 |
| Blessi Accounting Ltd | Professional & scientific | 2024 |
| Blue Moon Car Hire & Services Ltd | Manufacturing | 2014 |
| Bmarkcorp Ltd | Administrative & support | 2021 |
| Bmot NIG Limited | Wholesale & retail | 2025 |
| Bohutskyi Logistics Ltd | Transport & logistics | 2026 |
| Bostin Tackle Ltd | Wholesale & retail | 2022 |
| Bowers & Jones Limited | Manufacturing | 1955 |
| BR Entertainmentz Ltd | Wholesale & retail | 2025 |
| Bradley Windows and Doors Limited | Construction | 2013 |
| Bradleys NO 1 Ltd | Hospitality | 2023 |
| Bradmoriarty Ltd | Other services | 2025 |
| Brandserve Ltd | Administrative & support | 2020 |
| Brar One Limited | Transport & logistics | 2023 |
| Brar Ventures Ltd | Wholesale & retail | 2018 |
| Brasso Deliveries Limited | Transport & logistics | 2025 |
| Brave Fitness Ltd | Education | 2022 |
| Breathing Space Therapeutic Services CIC | Education | 2020 |
| Brewdini Coffee Ltd | Manufacturing | 2025 |
| BRH Kitchens & Bedrooms Ltd | Construction | 2021 |
| Brick & Barbell Ltd | Arts & recreation | 2025 |
| Bright Bargains Ltd | Wholesale & retail | 2021 |
| Brindley Asphalt Group Limited | Financial services | 2011 |
| Brindley Asphalt Limited | Construction | 1978 |
| Brindley Asphalt Roofing Limited | Construction | 2010 |