| Bespoke M&A Ltd | Professional & scientific | 2019 |
| Best Funerals Ltd | Other services | 2022 |
| Best of Burton CIC | Administrative & support | 2025 |
| Best Smokey Grill and Fried Chicken Ltd | Hospitality | 2026 |
| Best Thai Ltd | Hospitality | 2024 |
| Beta Jetting Services Ltd | Water & waste | 2008 |
| Bethany ANN Beauty Ltd | Other services | 2025 |
| Beyond Youth Project Limited | Education | 2022 |
| Beyond Youth Project Management Ltd | Education | 2020 |
| BG Burton Ltd | Hospitality | 2025 |
| BG Steak House Ltd | Hospitality | 2021 |
| Bhana Midland Ltd | Hospitality | 2019 |
| Bhatti Trades Ltd | Wholesale & retail | 2022 |
| Bhitc Ltd | Information & communication | 2021 |
| BHP Body Work Ltd | Wholesale & retail | 2025 |
| BHP Heating and Plumbing Ltd | Construction | 2025 |
| Big Burger Co. Ltd | Hospitality | 2025 |
| Big Dave’S Burgers Limited | Hospitality | 2023 |
| Biggs Property Group Ltd | Real estate | 2024 |
| Bike Tours for the Wounded C.I.C. | Administrative & support | 2014 |
| Bildbros Ltd | Real estate | 2021 |
| Billyfd Limited | Hospitality | 2026 |
| Bimcu Limited | Professional & scientific | 2024 |
| Bio-Tees Ltd | Manufacturing | 2026 |
| Biomedical Data Solutions Limited | Information & communication | 1988 |
| Bionet Plus Ltd | Real estate | 2023 |
| Birmingham Physiotherapy Centre Limited | Health & social care | 2007 |
| Birthing Circle Company Limited | Other services | 2025 |
| Bistro Life Ltd | Manufacturing | 2017 |
| Bizen Medical Limited | Professional & scientific | 2019 |
| BJ Automotive Limited | Wholesale & retail | 2024 |
| BJF Trading Ltd | Hospitality | 2025 |
| BJW2107 Ltd | Wholesale & retail | 2026 |
| BK 2 NU Ltd | Professional & scientific | 2014 |
| BK Bloodstock Ltd | Agriculture & fishing | 2024 |
| Black Construction Services Ltd | Construction | 2025 |
| Black MEN Ltd | Transport & logistics | 2017 |
| Blackboard Recruitment Limited | Administrative & support | 2003 |
| Blackroot Limited | Financial services | 2009 |
| Blackstone Solutions Ltd | Professional & scientific | 2025 |
| Blackstone Therapies Ltd | Health & social care | 2025 |
| Blair Davies Limited | Arts & recreation | 2013 |
| Blakenhall Media Limited | Administrative & support | 2010 |
| Blaze Virtual Reality Ltd | Arts & recreation | 2024 |
| BLC Roofing (Midlands) Ltd | Construction | 2018 |
| Blessed Pete Private Limited | Health & social care | 2014 |
| Blissful Getaways Ltd | Administrative & support | 2024 |
| Blithfield Building Services Limited | Construction | 1976 |
| Blocwork Studios Limited | Professional & scientific | 2014 |
| Bloom Skin Studio Ltd | Other services | 2025 |
| Blossom Care Group Limited | Health & social care | 2018 |
| Blossom Fit Care Ltd | Arts & recreation | 2026 |
| Blown Away by Becks Ltd | Arts & recreation | 2025 |
| Blsf Waldron Ltd | Real estate | 2021 |
| Blucka Ltd | Agriculture & fishing | 2025 |
| Blue 7 CS Ltd | Professional & scientific | 2024 |
| Blue Bloom Ltd | Real estate | 2025 |
| Blue Cedars Management Company Limited | Professional & scientific | 2001 |
| Blue Crystal Solutions Ltd | Information & communication | 2008 |
| Blue Cucumber Tours Limited | Administrative & support | 2013 |
| Blue FIG Interiors Ltd | Professional & scientific | 2007 |
| Blue Maritime Navigation Limited | Professional & scientific | 2009 |
| Blue Multimedia Limited | Information & communication | 2008 |
| Blue Ring Digital Services Limited | Information & communication | 2020 |
| Blue Water Care Group Ltd | Health & social care | 2020 |
| Blue Water Group Ltd | Administrative & support | 2019 |
| Blueflame Incineration Technologies Ltd | Wholesale & retail | 2020 |
| Blueline Van Services Limited | Transport & logistics | 2025 |
| Blues Point Ltd | Administrative & support | 2003 |
| Blues Point Recruitment Limited | Administrative & support | 2025 |
| Blum-Novotest Ltd. | Manufacturing | 1999 |
| BM Developers Limited | Construction | 2024 |
| BM Logistics Limited | Transport & logistics | 2006 |
| BM Range Limited | Wholesale & retail | 2018 |
| BME Investments Limited | Financial services | 2020 |
| Bnkr Services Ltd | Construction | 2025 |
| Boat Painting by Edward Limited | Manufacturing | 2022 |
| Body in the Box Ltd | Information & communication | 2019 |
| BOG Delivery Ltd | Transport & logistics | 2024 |
| Boilers N Bathrooms Ltd | Construction | 2025 |
| Bold Cities Ltd | Real estate | 2024 |
| Bold Partners Ltd | Financial services | 2024 |
| Bolsover Electrical and Property Services Ltd | Construction | 2018 |
| Book a Great Band Ltd | Arts & recreation | 2026 |
| Borderless Trading Ltd | Wholesale & retail | 2023 |
| Boria Ltd | Wholesale & retail | 2017 |
| Boring Social Ltd | Professional & scientific | 2023 |
| Bosship Trading Limited | Transport & logistics | 2023 |
| Bough & Co Ltd | Wholesale & retail | 2017 |
| Boultons Arenas & Gallops Ltd | Agriculture & fishing | 2017 |
| Boultons Contractors and Plant Hire Limited | Agriculture & fishing | 1988 |
| Bounce Holdings Ltd | Other services | 2018 |
| Bounteous Origins Limited | Wholesale & retail | 2025 |
| Boxes ETC... Limited | Administrative & support | 2023 |
| Boxist Ltd | Wholesale & retail | 2023 |
| BPE Pension Trustees Limited | Financial services | 1994 |
| Brabley Holdings Limited | Financial services | 2025 |
| Brabley Services Limited | Professional & scientific | 2025 |
| Bradley Creative Ltd | Professional & scientific | 2022 |
| Bradshaw House Ltd | Construction | 2019 |