| B.A.W Coatings Ltd | Construction | 2014 |
| B.A.W. Coatings Holdings Ltd | Financial services | 2020 |
| B.A.W. Inspection Services Limited | Professional & scientific | 2013 |
| B.D.S. Trailers Limited | Real estate | 1984 |
| B.E Security Ltd | Administrative & support | 2015 |
| B.E.F Prime Clean Limited | Administrative & support | 2026 |
| B.H.A MOT Group Ltd | Wholesale & retail | 2026 |
| B.K. Rigging Services Ltd | Information & communication | 2022 |
| B.M. Coaches and Rental Limited | Transport & logistics | 2006 |
| B.N.J Lewis Real Estate Limited | Real estate | 2024 |
| B.S Vision Locum Ltd | Wholesale & retail | 2025 |
| B.V. Training Ltd | Administrative & support | 2015 |
| B6421 Limited | Real estate | 2022 |
| BA Business Services & Solutions Ltd | Professional & scientific | 2020 |
| BA Construction Services Ltd | Construction | 2025 |
| BA Handyman Service Limited | Construction | 2025 |
| BA Hub Limited | Information & communication | 2022 |
| BA Kazeem Cleaning Limited | Information & communication | 2023 |
| BA Tech Consultant Ltd | Professional & scientific | 2026 |
| BAA Services Limited | Manufacturing | 2006 |
| Baas Publications Ltd | Administrative & support | 2014 |
| Babco Brands Limited | Wholesale & retail | 2013 |
| Babco International Ltd | Wholesale & retail | 2024 |
| Babs Motors Limited | Wholesale & retail | 2026 |
| Baby Bright Eyes Limited | Professional & scientific | 2012 |
| Baby Sensory Chesterfield Ltd | Education | 2018 |
| Baby Sharks Ltd | Other services | 2019 |
| Baby Store Sheffield Ltd | Extraterritorial | 2023 |
| Babyc Ltd | Information & communication | 2016 |
| Babylog 24/7 Ltd | Information & communication | 2010 |
| Babylon Shisha Shop Ltd | Wholesale & retail | 2022 |
| Baccus 6MM Ltd | Manufacturing | 2003 |
| Bacg Ltd | Professional & scientific | 2022 |
| Bach Barbers Limited | Other services | 2016 |
| Back to Spec Ltd | Administrative & support | 2020 |
| Back to Your Best Chiropractic Limited | Health & social care | 2010 |
| Backmoor Court Flats Co. Limited | Households | 1973 |
| Backoops Limited | Information & communication | 2016 |
| Backstory (Sheffield) Ltd | Construction | 2024 |
| Backup 4 Work Limited | Administrative & support | 2019 |
| Backyard Music Publishing Limited | Information & communication | 1997 |
| Bacon Brickwork & Buildingwork Ltd | Construction | 2017 |
| BAD Mother Ltd | Information & communication | 2025 |
| BAD PR Group Limited | Wholesale & retail | 2024 |
| BAD Taste Records Limited | Information & communication | 2009 |
| Badass Audio Ltd | Information & communication | 2022 |
| Badda Bean Coffee Ltd | Wholesale & retail | 2024 |
| Baddie Tattoos Ltd | Arts & recreation | 2023 |
| Badhaadhe Ltd | Transport & logistics | 2019 |
| Badham Projects Limited | Hospitality | 2010 |
| Badicel Logistics Limited | Transport & logistics | 2022 |
| Badori Trading Ltd | Wholesale & retail | 2024 |
| Badr Dent Ltd | Health & social care | 2017 |
| BAF Realestate Ltd | Real estate | 2025 |
| Baffour Ltd | Real estate | 2025 |
| BAG IT Don`T BIN IT Limited | Manufacturing | 2007 |
| BAG of Dreams Entertainment Ltd | Arts & recreation | 2020 |
| Bagco Limited | Manufacturing | 2002 |
| Bagel Bagel & Co Limited | Hospitality | 2026 |
| Bagel Shack Foods Ltd | Hospitality | 2023 |
| Bagel Shack Limited | Wholesale & retail | 2019 |
| Bagels Inc. Ltd | Hospitality | 2020 |
| BAH Wholesale Ltd | Wholesale & retail | 2025 |
| Bahman Properties Ltd | Real estate | 2026 |
| Baiboon Group Ltd | Construction | 2013 |
| Baijiu Evolution Ltd | Wholesale & retail | 2018 |
| Bailey Associates Management Ltd | Professional & scientific | 2010 |
| Bailey-Johns (P.H.L.) Limited | Construction | 1987 |
| Baileygate Carpets Limited | Wholesale & retail | 2005 |
| Baines & Heath Ltd | Professional & scientific | 2020 |
| Bains Property Group Ltd | Real estate | 2016 |
| Baiy Holdings Ltd | Financial services | 2025 |
| Bakarawala Consulting Limited | Wholesale & retail | 2013 |
| Bakayle (Holdings) Limited | Financial services | 2022 |
| Bakayle Properties Ltd | Real estate | 2022 |
| Bake Cafe Limited | Hospitality | 2011 |
| Baked in a BUN Limited | Manufacturing | 2023 |
| Baker Fletcher Limited | Professional & scientific | 2011 |
| Baker Horton Consultancy Limited | Professional & scientific | 2003 |
| Baker International Consultancy Ltd | Professional & scientific | 2019 |
| Baker Landscapes Limited | Administrative & support | 2026 |
| Baker Property Lettings Limited | Real estate | 2019 |
| Bakes Trader Limited | Manufacturing | 2019 |
| Bakhita Limited | Information & communication | 2022 |
| Baking Even Patisserie Ltd | Hospitality | 2025 |
| Bakins Facility Services Ltd | Other services | 2024 |
| Balahallas Limited | Health & social care | 2026 |
| Balajiaryan Ltd | Wholesale & retail | 2026 |
| Balan Evans Filmmaking Limited | Information & communication | 2021 |
| Balance Adventures Ltd | Administrative & support | 2026 |
| Balance High Design Ltd | Wholesale & retail | 2026 |
| Balata Data UK Limited | Information & communication | 2023 |
| Balby Health-Care Ltd | Health & social care | 2009 |
| Balby Metallurgical Limited | Wholesale & retail | 1991 |
| Baldev Skills Resources Limited | Administrative & support | 2007 |
| Baldwin Financials Ltd | Professional & scientific | 2015 |
| Baldys Landscaping and Driveways Ltd | Administrative & support | 2026 |
| Balf & Co Property Development Ltd | Real estate | 2023 |
| Balfour Carpets Ltd | Wholesale & retail | 2013 |
| Balkan Grill Ltd | Hospitality | 2022 |