| Barnetts Lane Ltd | Construction | 2022 |
| Barnetts Lane Management Ltd | Households | 2024 |
| Barnfield Associates Limited | Administrative & support | 2024 |
| Barrington-Hill Properties Limited | Real estate | 2021 |
| Barry Hunt Designs Limited | Professional & scientific | 2015 |
| Base Studios 1 Limited | Information & communication | 2006 |
| Base Studios Productions Limited | Information & communication | 2019 |
| Basing Manor UK Limited | Professional & scientific | 2013 |
| Bassi Properties & Management Ltd | Real estate | 2017 |
| Bateman Dentolegal Ltd | Health & social care | 2012 |
| Bateman Property Limited | Construction | 2003 |
| Bath Mews (Stourbridge) Limited | Households | 1980 |
| Bathroom Magic Limited | Professional & scientific | 2005 |
| Bayliss and Co.(Wealth Management) Limited | Financial services | 2011 |
| Baywoo Property Company Limited | Real estate | 2025 |
| BB Wings Streetfood Ltd | Hospitality | 2025 |
| Bbcc Holdings Ltd | Professional & scientific | 2024 |
| Bcgba Ltd | Extraterritorial | 2013 |
| BCGBA2 Ltd | Extraterritorial | 2013 |
| BCH Online Ltd | Professional & scientific | 2011 |
| BCJ Carpentry Ltd | Construction | 2015 |
| BD Profiles Limited | Manufacturing | 1987 |
| BDS Electrical (UK) Ltd | Construction | 2014 |
| BDS Power Limited | Professional & scientific | 2025 |
| BE Literate CIC | Administrative & support | 2023 |
| BE the Phoenix Group Ltd | Other services | 2024 |
| Beacon Barkers Pet Services Ltd | Professional & scientific | 2025 |
| Beacon Roadways Limited | Transport & logistics | 1977 |
| Beacon Vert Ltd | Extraterritorial | 2015 |
| Beacon Xport Limited | Transport & logistics | 2022 |
| Beaconmed Limited | Health & social care | 2022 |
| Beacons Hill Ltd | Manufacturing | 2024 |
| Beamans Properties Limited | Real estate | 2025 |
| Beamans Saddlery Limited | Administrative & support | 2005 |
| Beangrinder Ltd | Manufacturing | 2023 |
| Beanos Consulting Limited | Professional & scientific | 2024 |
| Beau Property Solutions Limited | Real estate | 2024 |
| BEAUMONT25 Limited | Construction | 2025 |
| Beautoxology Holdings Limited | Financial services | 2018 |
| Beautoxology LB Ltd | Health & social care | 2015 |
| Beautoxology Limited | Health & social care | 2008 |
| Beauty Boost Beauty and Hair Saloon Ltd | Other services | 2021 |
| Beck Projects Ltd | Construction | 2022 |
| Bedford Hospitality Limited | Real estate | 2018 |
| BEE Thai Kitchen Ltd | Hospitality | 2025 |
| BEE Well Together CIC | Education | 2022 |
| Beechthorn Ltd | Professional & scientific | 2014 |
| Beehive Brewing Company Limited | Financial services | 2017 |
| Beer Hawk Events Limited | Hospitality | 2023 |
| BEL Avenir Ltd | Other services | 2019 |
| Bela in London Ltd | Wholesale & retail | 2025 |
| Belbroughton CIC | Wholesale & retail | 2017 |
| Belbroughton Developments Ltd | Construction | 2010 |
| Belbroughton Storage Company Limited | Transport & logistics | 2016 |
| Belfry Windows Ltd | Construction | 2019 |
| Bella BOO Clothing Limited | Wholesale & retail | 2019 |
| Bellamy Close Residents Association Limited | Households | 2025 |
| Bellamy Stone Limited | Wholesale & retail | 2023 |
| Bellamy Sun Studio Limited | Other services | 2026 |
| Bellerophon & Pegasus Limited | Professional & scientific | 2022 |
| Bellgrand Limited | Administrative & support | 2010 |
| Bellona (Hagley) Management Company Limited | Households | 2013 |
| Bells Mill Fishery Limited | Arts & recreation | 2015 |
| BEN Davies Projects Ltd | Professional & scientific | 2014 |
| Benco Fire Ltd | Administrative & support | 2025 |
| Benning Property Holding Limited | Real estate | 2019 |
| Benreth Homes Limited | Real estate | 2017 |
| Bentley House Trustees Limited | Financial services | 2006 |
| Bentley Jordan Limited | Professional & scientific | 2015 |
| Benzu Drinks Limited | Wholesale & retail | 2024 |
| Berkley Street Management Company Limited | Households | 1997 |
| Berni Parker Designs Limited | Information & communication | 2010 |
| Berrusdon Investments Limited | Financial services | 2020 |
| Berry Fields Management Company Limited | Households | 1998 |
| Besegra Training & Development Ltd | Education | 2018 |
| Bespoke Barriers Ltd | Manufacturing | 2025 |
| Bespoke Holdings Solution Ltd | Financial services | 2024 |
| Bespoke Patination Ltd | Manufacturing | 2017 |
| Bestech Limited | Manufacturing | 1993 |
| BET Business Services Limited | Information & communication | 2012 |
| BET Centre (Kiosk) Limited | Arts & recreation | 2017 |
| Beth Dunn Voice Limited | Arts & recreation | 2026 |
| Bethel Steelworks Limited | Construction | 2026 |
| Betley Butterfly Ltd | Wholesale & retail | 2023 |
| Betta Accountants Ltd | Professional & scientific | 2019 |
| Betzi Limited | Wholesale & retail | 2024 |
| Bevands Cash Ltd | Financial services | 2019 |
| Bevands Investments Ltd | Real estate | 2019 |
| Beverage Design Solutions Ltd | Administrative & support | 2017 |
| Beverley Holidays Leisure Limited | Hospitality | 2022 |
| Beverley Parks (Paignton) Limited | Hospitality | 2016 |
| Beverley Parks Group Limited | Financial services | 2016 |
| Bevley Commercial Limited | Real estate | 2003 |
| Bevley Investments Ltd | Real estate | 2024 |
| Bewdley & Kidderminster Skip Hire Ltd | Water & waste | 2018 |
| Beyond Aesthetix Ltd | Health & social care | 2024 |
| Beyond Being Normal Ltd | Administrative & support | 2026 |
| BGC Capital Limited | Financial services | 2018 |
| BGH Homes Limited | Real estate | 2026 |
| BHT ENG. Co. Limited | Manufacturing | 2005 |