| Astley Financial Solutions Ltd | Professional & scientific | 2011 |
| Astrosecial Ltd | Wholesale & retail | 2018 |
| Atco Build Ltd | Construction | 2023 |
| Atsoccercamps Limited | Arts & recreation | 2015 |
| Attewood Developments Limited | Real estate | 2022 |
| Auctus Finance Ltd | Financial services | 2016 |
| Auraphone Ltd | Wholesale & retail | 2018 |
| Autoprep Automotive Solutions Ltd | Wholesale & retail | 2011 |
| Autumn Falls Contractors Ltd | Administrative & support | 2025 |
| Autumnriddle Ltd | Administrative & support | 2019 |
| Avensys UK Group Limited | Administrative & support | 2015 |
| Avensys UK Ltd | Health & social care | 2004 |
| Avia Systems Limited | Information & communication | 2011 |
| Aviationnextgen Ltd | Transport & logistics | 2010 |
| Avista OIL Services (UK) Ltd | Water & waste | 2010 |
| AVR Innovations Ltd | Real estate | 2026 |
| Award Storage Installation Limited | Construction | 2009 |
| AZH Consulting Services Ltd | Professional & scientific | 2026 |
| Aziz Building Services Ltd | Construction | 2024 |
| B S Inc Ltd | Construction | 2019 |
| B.A.J. System Design Ltd. | Manufacturing | 1997 |
| B.J.S Plumbing & GAS Ltd | Administrative & support | 2017 |
| B1K3 Ltd | Financial services | 2023 |
| BA Nguyen Investment 123 Ltd | Real estate | 2026 |
| Baay Ltd | Wholesale & retail | 2021 |
| Baculus Limited | Real estate | 2016 |
| BAD Panda Clothing Ltd | Wholesale & retail | 2024 |
| Bagleys Sales and Property Management Limited | Financial services | 2007 |
| Baldwin Leisure Ltd | Hospitality | 2022 |
| Ball Point Copy Limited | Administrative & support | 2022 |
| Ballantyne's Hair & Beauty Ltd | Other services | 2018 |
| Bar 45 Worcester Ltd | Hospitality | 2019 |
| Barksbydave Limited | Professional & scientific | 2021 |
| Barracks Storage Ltd | Transport & logistics | 2024 |
| BASE81 Properties Limited | Real estate | 2025 |
| Baskerville Accounting & Tax Services Limited | Professional & scientific | 2025 |
| Baxter&Rogue Ltd | Wholesale & retail | 2025 |
| Bay Horse PUB Co Limited | Hospitality | 2019 |
| Bay Tree Veterinary Centre Limited | Professional & scientific | 2009 |
| Baytmilk Limited | Households | 2025 |
| Baytmilk Pro Limited | Real estate | 2025 |
| Bayton Building Company Limited | Construction | 2010 |
| BBC Inflatables Ltd | Arts & recreation | 2011 |
| BE Inspired Limited | Wholesale & retail | 2013 |
| Behind Barz Ltd | Administrative & support | 2015 |
| Behind Barz Property Limited | Real estate | 2025 |
| Bentleys Stourport Limited | Wholesale & retail | 2020 |
| Bepcon Properties Limited | Real estate | 2022 |
| Beth Cordrey Occupational Therapy Ltd | Health & social care | 2023 |
| Bewdley Beauty Clinic Limited | Other services | 2018 |
| Bewdley Construction Ltd | Construction | 2024 |
| BF Security Solutions Ltd | Administrative & support | 2024 |
| BID Gurus Group Limited | Professional & scientific | 2024 |
| Bidgood Consulting Group Ltd | Professional & scientific | 2020 |
| Bidgood Ellison Gyms Ltd | Arts & recreation | 2021 |
| Bidgood Property Holdings Ltd | Real estate | 2025 |
| Big Chair Solutions Limited | Financial services | 2023 |
| Big.Small.Space Ltd | Professional & scientific | 2023 |
| Bigpawz Limited | Information & communication | 2023 |
| Bina Medical Limited | Health & social care | 2024 |
| Biologic Design Limited | Agriculture & fishing | 1999 |
| Birchall Estates Limited | Real estate | 2017 |
| Birchall Services Limited | Other services | 2022 |
| Birchwood Tree & Landscapes Ltd | Administrative & support | 2026 |
| Birmingham 2021 (Union CUP) Limited | Arts & recreation | 2019 |
| Bjwh Landscaping Services Ltd | Administrative & support | 2026 |
| Black Country Bulldogs Ltd | Wholesale & retail | 2017 |
| Blakmarlin Ltd | Manufacturing | 2022 |
| Blindlake Ltd | Administrative & support | 2019 |
| Blitz Body Boot Camps Ltd | Other services | 2015 |
| Blue Cube Innovation Limited | Administrative & support | 2007 |
| Blue Vibe Ltd | Administrative & support | 2015 |
| Blumac Digital Ltd | Information & communication | 2021 |
| Blush Bunnies Limited | Other services | 2012 |
| BOA Brewing Company Ltd | Manufacturing | 2023 |
| Boardmatter Enterprises Limited | Financial services | 1993 |
| Bootskins Ltd | Wholesale & retail | 2023 |
| Boozy Geezers Limited | Hospitality | 2025 |
| BR Bates Carpentry UK Ltd | Manufacturing | 2022 |
| Bramlow Limited | Professional & scientific | 2010 |
| Branches Day Opportunities Ltd | Public administration | 2019 |
| Breadedcaster Ltd | Wholesale & retail | 2019 |
| Breese Property Limited | Real estate | 2025 |
| Breunung-Joshi Limited | Health & social care | 2019 |
| Brick 'N' Mortar Limited | Construction | 2009 |
| Bridge Bearings Limited | Manufacturing | 1958 |
| Bridge Boat Yard Ltd | Real estate | 2018 |
| Brightstone Developments Ltd | Construction | 2021 |
| Brindley Street Freehold Ltd | Extraterritorial | 2016 |
| British Society of Paediatric Radiologists CIC | Health & social care | 2026 |
| Brits Corporate Services Limited | Professional & scientific | 2009 |
| Broadwater Garage Ltd | Wholesale & retail | 2022 |
| Bronzelock Ltd | Wholesale & retail | 2019 |
| Broome Farm (West Midlands) Limited | Agriculture & fishing | 2021 |
| Broome Farm Holdings Limited | Financial services | 2021 |
| Brothers Property Holdings Ltd | Real estate | 2025 |
| Buildings UK (Midlands) Ltd | Manufacturing | 2023 |
| Bumble and Bean Ltd | Wholesale & retail | 2024 |
| BY Leah Ltd | Wholesale & retail | 2025 |
| BYH Express Couriers Ltd | Transport & logistics | 2025 |