| Atruism Gear Ltd | Wholesale & retail | 2026 |
| Atticus Risk Solutions Limited | Financial services | 2021 |
| Atwal Convenience Store Ltd | Wholesale & retail | 2024 |
| Atwal Properties Limited | Real estate | 2014 |
| Audioedge Rentals Limited | Administrative & support | 2025 |
| Audnam Build Ltd | Construction | 2025 |
| Aujla Group Property Limited | Real estate | 2020 |
| Austin Law Associates Limited | Professional & scientific | 2015 |
| Austin Law Ltd | Professional & scientific | 2026 |
| Authentic Thai Spice Ltd | Hospitality | 2025 |
| Authentic Ventures Ltd | Professional & scientific | 2025 |
| Auto Euro UK Ltd | Wholesale & retail | 2015 |
| Autoguard Alarms Limited | Construction | 2009 |
| Automated Control Consultants Limited | Information & communication | 2013 |
| Autonomy Solutions Limited | Professional & scientific | 2025 |
| Avalon Heritage Ltd | Professional & scientific | 2016 |
| Avancez Holdings Limited | Professional & scientific | 2010 |
| Avanthi Consultants Ltd | Professional & scientific | 2019 |
| Avanthi Lettings Ltd | Real estate | 2017 |
| Aveline Holdings Ltd | Financial services | 2026 |
| Aveniq Ltd | Wholesale & retail | 2025 |
| Aventra Solutions Limited | Professional & scientific | 2025 |
| Aves Group Limited | Wholesale & retail | 2020 |
| Aviation Lease Solutions Limited | Professional & scientific | 2018 |
| Avongreen Scientific Limited | Wholesale & retail | 2016 |
| Avromist Limited | Administrative & support | 1983 |
| Avsei Ltd | Hospitality | 2025 |
| AW Silvester and Company Limited | Real estate | 2008 |
| AWD Communications Limited | Information & communication | 2000 |
| AWD Group Events Limited | Administrative & support | 2017 |
| Axes Holdings Limited | Financial services | 2023 |
| Axis (Midlands) Ltd | Real estate | 2026 |
| Axnn Fitness Ltd | Wholesale & retail | 2025 |
| AYB Medical Limited | Health & social care | 2022 |
| Ayse Nalin Ltd | Hospitality | 2025 |
| AYX Ltd | Health & social care | 2026 |
| Azevedo & Silva Limited | Health & social care | 2020 |
| Aziz Midlands Property Management Ltd | Real estate | 2025 |
| Azlaan Services Ltd | Administrative & support | 2017 |
| AZR Optics Ltd | Health & social care | 2021 |
| AZT Developments Ltd | Real estate | 2019 |
| Azteca Roofing+ Limited | Construction | 2025 |
| B & a Renovations Limited | Construction | 2022 |
| B & C Enterprises Ltd | Wholesale & retail | 2021 |
| B & E Carpentry Limited | Manufacturing | 2018 |
| B & G Liquor Limited | Wholesale & retail | 2003 |
| B Curtis Properties Ltd | Real estate | 2021 |
| B H Planning and Development LLP | | 2010 |
| B H Planning Limited | Professional & scientific | 2015 |
| B J P Property Services Ltd | Real estate | 2017 |
| B&H Vehicle Repair Ltd | Wholesale & retail | 2024 |
| B&L Brothers Ltd | Real estate | 2023 |
| B.B. Sign & Graphic Ltd | Administrative & support | 1997 |
| B.G.K (UK) Limited | Health & social care | 2011 |
| B.S. Transport Limited | Transport & logistics | 2004 |
| BA Surveying Services Ltd | Professional & scientific | 2023 |
| BAB Kaizen Limited | Information & communication | 2026 |
| Baby Bumps Scan Studio Ltd | Health & social care | 2024 |
| Bache Brothers Cycles Limited | Wholesale & retail | 2013 |
| Bache Pallets Limited | Manufacturing | 1978 |
| Bache Pallets Repair Limited | Manufacturing | 2016 |
| Badboy Wings Kitchen Ltd | Hospitality | 2026 |
| Bagnett Wood Logs Ltd | Agriculture & fishing | 2022 |
| Bake Stourbridge Ltd | Manufacturing | 2026 |
| Baker Estate Holdings Ltd | Financial services | 2023 |
| Baker Lyons HR Limited | Administrative & support | 2024 |
| Bakers Plasterers Ltd | Construction | 2015 |
| Bakes by Millie Ltd | Manufacturing | 2025 |
| Balds Lane Fish Bar Limited | Wholesale & retail | 2013 |
| Balletcise Ltd | Arts & recreation | 2025 |
| Balsci Ltd | Public administration | 2025 |
| Band of Light Media Ltd | Information & communication | 2008 |
| Bani-Legal Ltd | Professional & scientific | 2023 |
| Bani-Legal Properties Ltd | Real estate | 2026 |
| Bar Cargolift UK Limited | Wholesale & retail | 2018 |
| Bar-One Racing Limited | Arts & recreation | 2004 |
| Barbados Dreams Limited | Professional & scientific | 2008 |
| Barberry Ansty Limited | Construction | 2020 |
| Barberry Bardon Limited | Construction | 2025 |
| Barberry Brightwell Limited | Real estate | 2015 |
| Barberry Bromsgrove Limited | Real estate | 2015 |
| Barberry Coventry Limited | Construction | 2010 |
| Barberry Developments Limited | Construction | 1986 |
| Barberry East Hendred Limited | Real estate | 2017 |
| Barberry Grantham Limited | Real estate | 2017 |
| Barberry Half Key Limited | Real estate | 2021 |
| Barberry Holdings Limited | Financial services | 2021 |
| Barberry Homes Limited | Extraterritorial | 1996 |
| Barberry Hurcott Limited | Real estate | 2013 |
| Barberry Industrial Limited | Real estate | 2017 |
| Barberry Perry Barr Limited | Construction | 2016 |
| Barberry Perton Limited | Real estate | 2015 |
| Barberry Properties Limited | Extraterritorial | 2009 |
| Barberry Real Estates Limited | Administrative & support | 2017 |
| Barberry Securities Limited | Extraterritorial | 1995 |
| Barberry Summerhill Limited | Real estate | 2014 |
| Barberry Swindon Limited | Real estate | 2013 |
| Barberry Swindon Number Two Limited | Real estate | 2022 |
| Barista at Work Limited | Wholesale & retail | 2026 |
| Barnard & Butler (Carpentry Contractors) Limited | Administrative & support | 2001 |