| Bourne Electrical Engineers Limited | Construction | 2002 |
| Bournville Care Homes Ltd | Health & social care | 2024 |
| Bournville Catering Equipment Limited | Wholesale & retail | 2004 |
| Bournville Holdings Limited | Real estate | 2020 |
| Bournville Park Resident Management Company Limited | Households | 2018 |
| Boutique Balloons Solihull Limited | Arts & recreation | 2021 |
| Boutique by Tillys Limited | Other services | 2021 |
| Bovingdon Brickworks Limited | Real estate | 1959 |
| Bowden and Sons Limited | Manufacturing | 1997 |
| Bowers Precision Engineers Limited | Extraterritorial | 2003 |
| Bowyer Engineering (Solutions) Limited | Manufacturing | 2024 |
| Box Trees Admin Limited | Professional & scientific | 2025 |
| Box Trees Flowers 1 Ltd | Other services | 2023 |
| Boxcey Ltd | Professional & scientific | 2023 |
| Boxesandcrates Limited | Manufacturing | 2024 |
| Boxshifters Ltd | Extraterritorial | 2005 |
| Boxtrees Eatery Limited | Hospitality | 2023 |
| Boxx Movers Ltd | Transport & logistics | 2023 |
| Boylesports (UK) Limited | Arts & recreation | 2002 |
| BP Surveying Ltd | Professional & scientific | 2025 |
| BPG Commercial Limited | Real estate | 2023 |
| BPG Construction Management Limited | Construction | 2005 |
| BPG Developments Limited | Construction | 2018 |
| BPG Made Limited | Construction | 2023 |
| BPH Exterior Ltd | Administrative & support | 2022 |
| BPL Engineering Group Limited | Manufacturing | 2004 |
| BPL Engineering Holdings Limited | Administrative & support | 2015 |
| Bplusm Maintenance Ltd | Construction | 2023 |
| Bpswhite Properties Limited | Real estate | 2021 |
| BQC Bristol Limited | Wholesale & retail | 2019 |
| BQC Nottingham Limited | Wholesale & retail | 2019 |
| BR Tech Group Limited | Information & communication | 2026 |
| Bracebridge Holdings Limited | Arts & recreation | 1995 |
| Bradbell RE Limited | Financial services | 2021 |
| Bradbourne Plumbing and Heating Limited | Construction | 2016 |
| Braddons Building Services Ltd | Construction | 2000 |
| Bragg Estates (Holdings) Ltd | Real estate | 2015 |
| Bragg Estates Ltd. | Real estate | 2015 |
| Bragge Limited | Professional & scientific | 2016 |
| Braggfood Ltd | Hospitality | 2024 |
| Brake Stop Ltd | Wholesale & retail | 2020 |
| Bramble Bees Florist Ltd | Wholesale & retail | 2020 |
| Brambly Trails Ltd | Wholesale & retail | 2025 |
| Bramcote International Limited | Professional & scientific | 2017 |
| Bramlex Limited | Information & communication | 1998 |
| Brandan Blake International Beverages Ltd | Wholesale & retail | 2023 |
| Branding Ltd | Real estate | 2023 |
| Brandwood Clinic Ltd | Health & social care | 2015 |
| Brandwood International Limited | Wholesale & retail | 2016 |
| Branhill Investments Ltd | Real estate | 2019 |
| Brass Tacks Media Ltd | Professional & scientific | 2023 |
| Brave Bear Marketing Limited | Professional & scientific | 2019 |
| Bravix Consulting Ltd | Professional & scientific | 2018 |
| Braywhite Asset Management Limited | Financial services | 2018 |
| Braywhite Holdings Limited | Financial services | 2019 |
| Breathe Reformer Pilates Ltd | Arts & recreation | 2025 |
| Breckon & Woodley Estate Agents Ltd | Real estate | 2024 |
| Breedon Close Management Limited | Households | 2023 |
| Breese & Earle Properties Limited | Real estate | 2018 |
| Breeze Trading Limited | Wholesale & retail | 2013 |
| Breizh Rooster Limited | Other services | 2017 |
| Brent Builders Limited | Construction | 1989 |
| Brereton Ltd | Water & waste | 2006 |
| Brewstop Ltd | Hospitality | 2025 |
| BRI7 Ltd | Information & communication | 2020 |
| Brian Dale & Daughter Limited | Transport & logistics | 2020 |
| Brian Hyde Limited | Wholesale & retail | 1955 |
| Brian Jeffs Finance Limited | Financial services | 2000 |
| Brick Craft Limited | Construction | 2012 |
| Bridal and Prom Bar Limited | Wholesale & retail | 2022 |
| Brides of Solihull Limited | Wholesale & retail | 2003 |
| Bridge Financial Solutions Limited | Administrative & support | 2016 |
| Bridge for Tomorrow (BFT) CIC | Education | 2026 |
| Bridge Metals (Birmingham) Limited | Administrative & support | 1982 |
| Bridge Solutions & Services Limited | Information & communication | 1992 |
| Bridge Vista Capital Ltd | Financial services | 2023 |
| Bridgenorth Consultancy Ltd | Professional & scientific | 2025 |
| Bridgepoint Pathways Ltd | Education | 2025 |
| Bridgeport Investments 2 Limited | Financial services | 2024 |
| Bridges Cleaning Services Ltd | Administrative & support | 2023 |
| Bridgestone Housing Ltd | Real estate | 2026 |
| Bridgetown Group Holdings Limited | Financial services | 2025 |
| Bridgetown Holdings Limited | Financial services | 2015 |
| Bridgetown Plant Hire Limited | Administrative & support | 2013 |
| Bridgewater Projects Limited | Construction | 2004 |
| Bridgeway Support Services Ltd | Administrative & support | 2026 |
| Briefclick Services Limited | Administrative & support | 2004 |
| Bright Coffee Roastery Ltd | Manufacturing | 2023 |
| Bright Interiors Ltd | Manufacturing | 2022 |
| Bright Masters Merrill Ltd | Wholesale & retail | 2020 |
| Bright PI Education Consultancy Limited | Education | 2011 |
| Bright Roots Ltd | Health & social care | 2023 |
| Bright Swans Day Nursery (UK) Ltd | Education | 2016 |
| Brighter Lives Care Ltd | Health & social care | 2026 |
| Brightleaf Education Group Ltd | Education | 2024 |
| Brighton Technologies Ltd | Information & communication | 2023 |
| Brightside Cleaning Ltd | Administrative & support | 2025 |
| Brightside Creative Ltd | Professional & scientific | 2021 |
| Brightside Forest School and Tuition CIC | Education | 2024 |
| Brightstar Analytics Limited | Information & communication | 2016 |