| Avengers Help and Advice CIC | Real estate | 2025 |
| Avery Knights Solicitors Limited | Professional & scientific | 2004 |
| AVL Logistics Ltd | Transport & logistics | 2020 |
| Award Motors Limited | Wholesale & retail | 2013 |
| Axiomatic Ltd | Information & communication | 2024 |
| Axxtan Foods Ltd | Wholesale & retail | 2025 |
| Aylah Limited | Professional & scientific | 2021 |
| Aztec Construction Midlands Ltd | Construction | 2019 |
| Azzure Apps Limited | Information & communication | 2014 |
| B Love Events Creation Ltd | Hospitality | 2025 |
| B M S Toor Ltd | Transport & logistics | 2023 |
| B RAJ & Sons Wholesale Meat Ltd | Wholesale & retail | 2013 |
| B RAJ Group Ltd | Financial services | 2026 |
| B RAJ Properties Ltd | Real estate | 2024 |
| B.& G.Lock & Tool Co.Limited | Manufacturing | 1952 |
| B.B. Repairs Limited | | 1981 |
| B.I.G Finance Limited | Financial services | 2015 |
| B.J. Engineering (Services) Limited | Manufacturing | 1979 |
| Baaz Buildings and Construction Ltd | Construction | 2026 |
| Baba Attal RAI Transport Ltd | Construction | 2016 |
| Babber Investments Limited | Real estate | 2017 |
| Babsibraheem Ventures Limited | Wholesale & retail | 2016 |
| Baby City Ltd | Wholesale & retail | 2023 |
| Baddies and Zaddies Ltd | Hospitality | 2024 |
| BAL Locums Limited | Health & social care | 2004 |
| Balde Care Limited | Administrative & support | 2026 |
| Baljeet Services Ltd | Construction | 2025 |
| Balloons Direct Ltd | Wholesale & retail | 2020 |
| Balls Properties Limited | Real estate | 2018 |
| Bambi's Group Ltd | Wholesale & retail | 2024 |
| Bankplus Recruitment and Training Ltd | Administrative & support | 2016 |
| Barber Trim Ltd | Other services | 2026 |
| Bardashan Car Wash Ltd | Administrative & support | 2026 |
| Barney's Sarnies UK Ltd | Manufacturing | 2025 |
| Barote DAB Limited | Transport & logistics | 2025 |
| Barring Ltd | Wholesale & retail | 2019 |
| Bashir & Sons Holdings Ltd | Wholesale & retail | 2019 |
| Basic House Ltd. | Wholesale & retail | 2013 |
| Basra Construction Ltd | Construction | 2014 |
| Bath Transport Limited | Transport & logistics | 2018 |
| Bathroom-Decor Ltd | Construction | 2019 |
| Bawa Shop Front Shutters Limited | Manufacturing | 2014 |
| BB Acconsult Limited | Professional & scientific | 2026 |
| Bdls Services Ltd | Professional & scientific | 2018 |
| Bdshj Transport Ltd | Transport & logistics | 2026 |
| BE Wise Storage Ltd | Transport & logistics | 2020 |
| BE YOU Hair Ltd | Other services | 2018 |
| Beauty Diamonds Ltd | Other services | 2024 |
| Bee's Treatz Limited | Manufacturing | 2025 |
| Begat Ltd | Education | 2020 |
| Behind HER Ltd | Manufacturing | 2026 |
| Believe and Sons Ltd | Hospitality | 2024 |
| Bella Allure Ltd | Other services | 2024 |
| Bella Car Wash Ltd | Wholesale & retail | 2025 |
| Bellajade Group Limited | Other services | 2023 |
| Bellden Mayshaw Holiday Lets Ltd | Hospitality | 2026 |
| Bellsway Healthcare Solutions Ltd | Health & social care | 2024 |
| Benjamin Property Investment Ltd | Real estate | 2015 |
| Benson Williams Wills, Probate and Trusts Limited | Professional & scientific | 2003 |
| Bentley Haulage Limited | Transport & logistics | 2008 |
| Beri Nyuy Group Limited | Wholesale & retail | 2025 |
| Berts High View Ltd | Professional & scientific | 2025 |
| Best Buy Orien UK Ltd | Wholesale & retail | 2019 |
| Bestway Motors Ltd | Wholesale & retail | 2023 |
| Betapay Limited | Wholesale & retail | 2018 |
| Betarisk Limited | Information & communication | 2014 |
| Bhang-Rah Ltd | Wholesale & retail | 2025 |
| Bharaj Midland Group Limited | Professional & scientific | 2023 |
| Bharaj Sales & Lettings Limited | Real estate | 2025 |
| Bhatti Haulage Ltd | Transport & logistics | 2021 |
| Bhau Driveways Ltd | Construction | 2025 |
| BHB Services Ltd | Wholesale & retail | 2018 |
| BHS Delivery Services Ltd | Transport & logistics | 2025 |
| Bhullar Freightways Ltd | Transport & logistics | 2023 |
| Bhullar Transport U.K. Ltd | Transport & logistics | 2024 |
| Biasi UK Limited | Wholesale & retail | 1989 |
| Big Abacus Ltd | Real estate | 2016 |
| Big Challow Ltd | Real estate | 2017 |
| Big Cheltenham Ltd | Real estate | 2017 |
| Big Chigwell (198) Ltd. | Real estate | 2017 |
| Big Chigwell (202) Ltd. | Real estate | 2017 |
| Big Chigwell Ltd | Real estate | 2016 |
| Big Day Chinese Ltd | Hospitality | 2008 |
| Big Development Finance Ltd | Real estate | 2016 |
| Big Finance Holdings Ltd | Financial services | 2016 |
| Big Gloucester Ltd | Real estate | 2017 |
| Big Gold Crown Limited | Financial services | 2023 |
| Big Investment One Limited | Financial services | 2017 |
| Big Jacko Bear Limited | Real estate | 2017 |
| Big Point Limited | Manufacturing | 2020 |
| Big Restaurant Group Limited | Hospitality | 2020 |
| Big Spring Street Apartments Ltd | Real estate | 2018 |
| Big Spring Street Limited | Real estate | 2014 |
| Big Sutton Coldfield Limited | Real estate | 2017 |
| Big Symington Studio Ltd | Real estate | 2017 |
| Biggy’S Grill Ltd | Hospitality | 2024 |
| Bilston 1955 Limited | Extraterritorial | 2014 |
| Bimmies Foods Limited | Wholesale & retail | 2020 |
| Birmingham Brake Specialists Ltd | Wholesale & retail | 2008 |
| Birsdulai Limited | Transport & logistics | 2024 |