| BAD Apple Engineering Ltd | Manufacturing | 2016 |
| Baden Dental Ltd | Health & social care | 2024 |
| Bagheri & SON Ltd | Health & social care | 2017 |
| Baltic Ellesmere Holding Limited | Real estate | 2024 |
| Baltic Ellesmere Limited | Wholesale & retail | 2021 |
| Baltic Ellesmere Properties Limited | Real estate | 2024 |
| BAN BAN Solution Ltd | Construction | 2025 |
| Banks Engineering Limited | Professional & scientific | 2013 |
| Barbers Bargains Ltd | Wholesale & retail | 2023 |
| Barbridge Residents Association Limited | Real estate | 2000 |
| Barnes Rotating Plant Ltd | Manufacturing | 2025 |
| Barnett Transport Limited | Transport & logistics | 2002 |
| Barnston Homes Limited | Construction | 2017 |
| Bbdu Properties Limited | Real estate | 2014 |
| BCF Pension Trustees Ltd | Professional & scientific | 2006 |
| BD Service Centre Limited | Wholesale & retail | 2025 |
| BDC Engineering Services Ltd | Manufacturing | 2009 |
| BDC PVT Limited | Health & social care | 2026 |
| BDS Bajwa Limited | Health & social care | 2025 |
| BE Positive Taylored Brand Ltd | Wholesale & retail | 2018 |
| Be-Plas Hygienic Walls & Ceilings Ltd | Wholesale & retail | 2008 |
| Beaufort Group Holdings Limited | Manufacturing | 2020 |
| Bebb Elec Ltd | Construction | 2022 |
| Becosmos Ltd | Wholesale & retail | 2025 |
| Bedford Dental Academy Limited | Education | 2017 |
| Bee's Teas Ltd | Hospitality | 2016 |
| Beechway Ltd | Professional & scientific | 2021 |
| Beechwood Arboreal Services Limited | Other services | 2010 |
| Beemarh Enterprise Ltd | Health & social care | 2025 |
| Beemer Mirrors Ltd | Wholesale & retail | 2025 |
| Bees Catering Equipment Ltd | Wholesale & retail | 2025 |
| Belfast Care Ltd | Health & social care | 2021 |
| Belgraves Accountants Ltd | Professional & scientific | 2020 |
| Belgraves Services Ltd | Other services | 2021 |
| Bell Graphics Ltd | Manufacturing | 2006 |
| Bell Rental Properties Limited | Real estate | 2026 |
| Bella Vida Beauty UK Ltd | Other services | 2024 |
| Below Wensted Limited | Financial services | 2022 |
| Benjamin Redhead Ltd | Health & social care | 2022 |
| Berk Plumbing and Welding Ltd | Construction | 2020 |
| Berkeley Medical Ltd | Health & social care | 2024 |
| Bersham Colliery Limited | Energy | 2023 |
| Bespoke Care Cheshire Ltd | Health & social care | 2012 |
| Bespoke Trainers Ltd | Education | 2025 |
| Best Buy Ventures Ltd | Wholesale & retail | 2026 |
| Best C CUT Barbers Limited | Other services | 2020 |
| Bethermole Limited | Wholesale & retail | 1976 |
| Betterware Holidays Ltd | Administrative & support | 2019 |
| Bevie Handcraft UK Limited | Wholesale & retail | 1984 |
| Bevie Partners Limited | Manufacturing | 1992 |
| Beyond BEAUT1FUL Ltd | Other services | 2025 |
| BG7 Driving School Ltd | Education | 2023 |
| Bhandal Cheshire Ltd | Transport & logistics | 2026 |
| Bhavyaa Properties Ltd | Real estate | 2023 |
| Big Style Fashions Limited | Wholesale & retail | 2012 |
| Bikersport.Com Limited | Professional & scientific | 2001 |
| Biohit Healthcare Limited | Administrative & support | 2008 |
| Birch Dental Practice Limited | Health & social care | 2014 |
| Birch Investments Limited | Real estate | 2012 |
| BISTRO351 Limited | Hospitality | 2024 |
| Biting Point Driving School Ltd | Education | 2020 |
| BITR8 Ltd | Information & communication | 2021 |
| Biuk Brands Ltd | Wholesale & retail | 2023 |
| BJE Solutions Ltd | Professional & scientific | 2017 |
| Black Cat Creative Translations Ltd | Professional & scientific | 2023 |
| Black to Green Energy Solutions Limited | Professional & scientific | 2022 |
| Blackbear Financial Group Ltd | Financial services | 2017 |
| Blackwaterfoot Holdings Ltd | Financial services | 2024 |
| Blackwinter Property Investments Ltd | Real estate | 2025 |
| Blades Down CIC | Education | 2025 |
| Blain Boland and Thomas Limited | Professional & scientific | 2008 |
| Blancet Limited | Education | 2022 |
| Blanche Kadjo Ltd | Health & social care | 2023 |
| Bless WJM Limited | Health & social care | 2025 |
| BLF Trading Limited | Wholesale & retail | 2024 |
| BLH Financial Services Ltd | Financial services | 2018 |
| Bloom Care Services Ltd | Health & social care | 2021 |
| Bloom Digital Empire Ltd | Wholesale & retail | 2025 |
| Blossify Events Ltd | Hospitality | 2023 |
| Blot & Binding Ltd | Wholesale & retail | 2026 |
| Blue COW Solutions Ltd | Information & communication | 2016 |
| Blue World Financial Solutions Ltd | Financial services | 2024 |
| Bluebond Investments Limited | Other services | 1999 |
| Bluestar Engineering Services Limited | Professional & scientific | 2023 |
| Blueway One Way Limited | Professional & scientific | 2007 |
| Bmwing Mirrors Ltd | Wholesale & retail | 2022 |
| BNB Wholesale Limited | Wholesale & retail | 2024 |
| Boagwood Ltd | Real estate | 2023 |
| Boat Safety Scheme Limited | Other services | 2024 |
| Bodyology Limited | Health & social care | 2024 |
| Bollington Dental Practice Limited | Health & social care | 2014 |
| Bolton New Care Limited | Health & social care | 2010 |
| Bonanza Pdrl Ltd | Health & social care | 2019 |
| Boughton Barbers Limited | Other services | 1993 |
| Boulder HUT Limited | Arts & recreation | 2016 |
| Bowdlers House Dental Practice Limited | Health & social care | 2023 |
| Boxacre Productions Limited | Other services | 2013 |
| Boztech Building Services and Construction Limited | Construction | 2020 |
| BPS Industrial Flooring Limited | Construction | 2025 |
| Braces With BEN Ltd | Health & social care | 2023 |