| Beyondmyscarf (BMS) Ltd | Health & social care | 2022 |
| BF Innovation Ltd | Manufacturing | 2011 |
| Bf-Group Ltd | Extraterritorial | 2022 |
| BGP Holdings Limited | Financial services | 2018 |
| BH & BC Management Company Limited | Households | 2023 |
| Bhoy Logistics Ltd | Transport & logistics | 2025 |
| Biddle Sport Limited | Construction | 1991 |
| Bidwell Capital Ltd. | Professional & scientific | 2009 |
| BIF International Limited | Wholesale & retail | 2017 |
| Big Bear Holdings Ltd | Real estate | 2018 |
| Big Boys Fireworks Limited | Wholesale & retail | 2017 |
| Big City Radio CIC | Information & communication | 2010 |
| Big Day in a Box Limited | Professional & scientific | 2003 |
| Big Poppa’S Fried Chicken Ltd | Hospitality | 2025 |
| Big ROO Limited | Professional & scientific | 2024 |
| BIG5 Healthcare Ltd | Health & social care | 2025 |
| Bigg Red Ltd | Manufacturing | 2003 |
| Bighead Broadcast Limited | Information & communication | 2021 |
| Biju Joseph Limited | Transport & logistics | 2015 |
| Bilad AL Sham Ltd | Wholesale & retail | 2020 |
| Bilford PUB Co Ltd. | Professional & scientific | 2014 |
| Billiards Bar Ltd | Hospitality | 2023 |
| Bills Coffees Limited | Hospitality | 2018 |
| Billz Grillz Limited | Hospitality | 2026 |
| Bing International Limited | Professional & scientific | 2024 |
| Binit Group Limited | Water & waste | 2016 |
| BIO - Diagnostics Limited | Professional & scientific | 1979 |
| BIO Crafted Labs Ltd | Wholesale & retail | 2022 |
| Biocard Ltd | Professional & scientific | 2024 |
| Biodiversity Plus | Extraterritorial | 2010 |
| Biogrow Limited | Agriculture & fishing | 2019 |
| Biomedx Limited | Financial services | 2013 |
| Biopak (UK) Ltd | Wholesale & retail | 2000 |
| Bioresen Ltd. | Other services | 2011 |
| Biostella Ltd | Professional & scientific | 2021 |
| Birch Green Services Ltd | Other services | 2020 |
| Birch Meadow (Worcester) Management Company Limited | Households | 2018 |
| Birchwood Education Group Ltd | Education | 2025 |
| Birchwood Rentals Limited | Real estate | 2023 |
| Birmingham and Solihull Lift (Fundco 1) Limited | Construction | 2003 |
| Birmingham and Solihull Lift (Fundco 3) Limited | Construction | 2010 |
| Birmingham and Solihull Lift (Fundco 4) Limited | Real estate | 2012 |
| Birmingham and Solihull Local Improvement Finance Trust Limited | Real estate | 2003 |
| Birmingham Barbed Tape Limited | Extraterritorial | 2013 |
| Birmingham Electrics Limited | Construction | 2010 |
| Birmingham Film & TV Market Limited | Administrative & support | 2022 |
| Birtsmorton Court Events Limited | Arts & recreation | 2020 |
| Birtsmorton Court Limited | Arts & recreation | 2000 |
| Bishbashbosh Cards, Toys & Collectables Ltd | Wholesale & retail | 2023 |
| Bishnu Laxmi Ltd | Hospitality | 2025 |
| Bishop Perowne Church of England College | Education | 2012 |
| Bishop's Accountancy Limited | Professional & scientific | 2011 |
| Bishops Cleeve Construction Limited | Real estate | 2016 |
| Bison Management Corporation Ltd | Administrative & support | 2023 |
| BIT of Banter Ltd | Health & social care | 2023 |
| Biterra Ltd | Information & communication | 2025 |
| Bits 'N' Pc's Worcester Limited | Wholesale & retail | 2019 |
| Bits 'N' Pc'Suk Limited | Manufacturing | 2012 |
| Bits N Bytes Ltd | Information & communication | 2016 |
| Bizztrak Limited | Extraterritorial | 2009 |
| BJ Taylor Ltd | Construction | 2021 |
| BJM Fleet and Repair Services Ltd | Wholesale & retail | 2026 |
| BJM Property Care Ltd | Construction | 2025 |
| Bjōrk House Chesterfield Gardens Limited | Hospitality | 2025 |
| Bjōrk House Noble Street Limited | Hospitality | 2025 |
| BKG Motor Vehicles Ltd | Wholesale & retail | 2003 |
| Black & WHIT3 Ltd | Wholesale & retail | 2017 |
| Black Agatha Limited | Real estate | 2022 |
| Black and White Associates Ltd | Administrative & support | 2025 |
| Black Belt Ltd | Extraterritorial | 2015 |
| Black Dog Adventures CIC | Professional & scientific | 2019 |
| Black Dog Developments Limited | Construction | 2000 |
| Black Dog Technical Writing Limited | Information & communication | 2005 |
| Black Duck Media Limited | Information & communication | 2011 |
| Black Flag Ltd | Education | 2025 |
| Black Horse Walk (Worcester) RTM Company Limited | Households | 2009 |
| Black Oak Land and Property Ltd | Professional & scientific | 2018 |
| Black Pear Advisory Ltd | Professional & scientific | 2025 |
| Black Pear Apparel Ltd | Wholesale & retail | 2022 |
| Black Pear Bespoke Ltd | Manufacturing | 2023 |
| Black Pear Data Solutions Limited | Information & communication | 2021 |
| Black Pear Financial Services Ltd. | Professional & scientific | 2017 |
| Black Pear Games Limited | Extraterritorial | 2021 |
| Black Pear Group Ltd | Real estate | 2025 |
| Black Pear Holdings Limited | Professional & scientific | 2025 |
| Black Pear Software Limited | Information & communication | 2009 |
| Black Sky Aviation Ltd | Transport & logistics | 2025 |
| Black Swan Windows Ltd | Construction | 2016 |
| Black Tapestry Tattoo Ltd | Other services | 2021 |
| Black Tapestry Workshops Ltd | Other services | 2024 |
| Black Tiger Commercial Limited | Real estate | 2018 |
| Blackmore Park Estates Limited | Real estate | 2022 |
| Blackmore Park Group Limited | Professional & scientific | 1977 |
| Blackmore Park Holdings Limited | Financial services | 1992 |
| Blackoak Finance Ltd | Wholesale & retail | 2012 |
| Blackpear Fencing Ltd | Education | 2025 |
| Blackpearlettings Limited | Real estate | 2011 |
| Blackpole Metals Limited | Water & waste | 2013 |
| Blackpole Powder Coating Ltd | Manufacturing | 2004 |
| Blackpole Steam Cleaning Company Limited | Wholesale & retail | 1999 |