| Brabourne WBP Limited | Construction | 2025 |
| Bradley M Limited | Wholesale & retail | 2024 |
| Brahma Finance Limited | Financial services | 2011 |
| Braich Construction Ltd | Construction | 2024 |
| Bral Trustees Limited | Extraterritorial | 1999 |
| Bram Health Care Group Limited | Public administration | 2022 |
| Brampton Cross Limited | Construction | 2020 |
| Brampton Cross Properties Limited | Construction | 2024 |
| Brampton Hub Limited | Construction | 2020 |
| Brant Andrew Limited | Wholesale & retail | 2016 |
| Brar Courier Transport Ltd | Transport & logistics | 2026 |
| Brar Logistics Limited | Transport & logistics | 2024 |
| Brazilian Aesthetic Medicine Ltd | Other services | 2025 |
| Breadbutter Midlands Limited | Hospitality | 2023 |
| Breedon G Limited | Wholesale & retail | 2023 |
| Breeze Online Store Ltd | Wholesale & retail | 2025 |
| Brenan Weston Limited | Professional & scientific | 2023 |
| Brewers Property Management Ltd | Real estate | 2026 |
| Brewood Limited | Construction | 2012 |
| Brick-E-Mart Limited | Wholesale & retail | 2023 |
| BRICKSANDMORTAR13 Ltd | Construction | 2022 |
| Bridge M Holdings Limited | Financial services | 2025 |
| Bridgewell Property Group Ltd | Hospitality | 2025 |
| Brierley Guns Limited | Wholesale & retail | 2003 |
| Briggs R Limited | Wholesale & retail | 2025 |
| Bright Shop Ltd | Wholesale & retail | 2025 |
| Brighter Universe Ltd | Construction | 2020 |
| Brilliants Barber Limited | Other services | 2025 |
| Brimstone Estates Ltd | Real estate | 2019 |
| Brisk Bike Ltd | Wholesale & retail | 2016 |
| Brit Adhesives Ltd | Manufacturing | 2013 |
| Britannia Law Centre Limited | Administrative & support | 2018 |
| Britannia Park Estates Ltd | Real estate | 2019 |
| Broad Constructions Group Ltd | Construction | 2024 |
| Broadside Construction Ltd | Construction | 2023 |
| Broadwell Developments Ltd | Construction | 2014 |
| Brock a SOT Limited | Wholesale & retail | 1999 |
| Brodie Consulting Services Limited | Information & communication | 2024 |
| Bromsfield Limited | Households | 2016 |
| Brook Pharmacare Limited | Health & social care | 2019 |
| Brookes Residential Ltd | Real estate | 2025 |
| Brookfleet Logistics Ltd | Transport & logistics | 2022 |
| Brookin & Nash Facilities Services Ltd | Administrative & support | 2025 |
| Brough Simon Limited | Wholesale & retail | 2014 |
| Brown J Limited | Wholesale & retail | 2024 |
| Brrgrr Co Ltd | Hospitality | 2020 |
| Brunchies Cafe Ltd | Hospitality | 2025 |
| Brushhire Ltd | Extraterritorial | 2017 |
| Brymill Limited | Extraterritorial | 1920 |
| BS Sandhu Builders Ltd | Construction | 2022 |
| BSJ Pharma Ltd | Administrative & support | 2017 |
| Bsjfoods Ltd | Wholesale & retail | 2019 |
| BSN Associates Holdings Limited | Professional & scientific | 2010 |
| BSN Associates Limited | Financial services | 2016 |
| BSN Financial Services Limited | Professional & scientific | 2024 |
| BTS Transit Ltd | Transport & logistics | 2026 |
| Btunes Sparkle Services Ltd | Administrative & support | 2026 |
| Buckley Training Services Ltd | Education | 2018 |
| Buczacza Limited | Transport & logistics | 2020 |
| Budgad Construction Limited | Extraterritorial | 2019 |
| Build-Minds Ltd | Construction | 2025 |
| Builder Bean Limited | Construction | 2025 |
| Bull Autos Solutions Ltd | Wholesale & retail | 2022 |
| Bulls Head PUB Ltd | Hospitality | 2025 |
| Burrluck R Limited | Wholesale & retail | 2022 |
| Business Solutions Technology and Management Consulting Ltd | Information & communication | 2011 |
| Butler a Limited | Wholesale & retail | 2014 |
| Butterfly Apparel Limited | Wholesale & retail | 2016 |
| Butterfly Embroidery Limited | Manufacturing | 2003 |
| BVS Construction Group Ltd | Construction | 2025 |
| BY Your Side Care Limited | Health & social care | 2026 |
| Byteomic Ltd | Information & communication | 2025 |
| C & D Goods Transport Ltd | Transport & logistics | 2023 |
| C J Records Ltd | Information & communication | 2019 |
| C J Shopfitting Limited | Construction | 2018 |
| C Mann Construction Limited | Construction | 2014 |
| C P N Systems Limited | Information & communication | 1998 |
| C R Storage Limited | Transport & logistics | 2022 |
| C S Occupational Therapy Services (Csot) Ltd | Other services | 2022 |
| Cable Management Centre Birmingham Limited | Wholesale & retail | 2006 |
| Cades Accommodation Ltd | Transport & logistics | 2013 |
| Cafelicious Limited | Hospitality | 2026 |
| Cairns G Limited | Wholesale & retail | 2020 |
| Cake Break Ltd | Wholesale & retail | 2024 |
| Cake Shop Franchise Ltd | Manufacturing | 2016 |
| Cakeland Limited | Wholesale & retail | 2013 |
| Calegate Ltd | Administrative & support | 2011 |
| Calidus Care Consultancy Limited | Professional & scientific | 2025 |
| Callcut SOT Limited | Wholesale & retail | 1996 |
| Camstar Business Solutions Ltd | Wholesale & retail | 2024 |
| Canbury Land Limited | Real estate | 2022 |
| Cannon Sports Limited | Wholesale & retail | 2010 |
| Canton Valley Limited | Hospitality | 2025 |
| Capital Star Development Ltd | Construction | 2026 |
| Capricorn Interiors Limited | Wholesale & retail | 2014 |
| Captain Maxx Ltd | Transport & logistics | 2020 |
| Captiva Property Services Limited | Financial services | 2022 |
| Car Plus Car Motor Management Ltd | Wholesale & retail | 2024 |
| Carbon Zorro Ltd | Wholesale & retail | 2013 |
| Cardonhill Limited | Professional & scientific | 1955 |