| Auctus Design Consultancy Ltd | Information & communication | 2024 |
| Aumovio Engineering Solutions Limited | Manufacturing | 1995 |
| Aurum Global Solutions Limited | Wholesale & retail | 2026 |
| Austen Prince Limited | Professional & scientific | 2002 |
| Austererun Ltd | Administrative & support | 2020 |
| Authentic Menders Ltd | Professional & scientific | 2023 |
| Auto Finance Specialists Ltd | Wholesale & retail | 2022 |
| Autolease Ltd | Administrative & support | 2020 |
| Automatic Door Suppliers Association Limited | Other services | 1997 |
| Automation Professionals Ltd | Professional & scientific | 2017 |
| Automotech Garage Equipment Ltd | Wholesale & retail | 2023 |
| Automotive Promotions Ltd | Administrative & support | 2013 |
| Autosmart Group Limited | Extraterritorial | 2003 |
| Autosmart Holdings Group Limited | Manufacturing | 2025 |
| Autosmart Holdings Limited | Manufacturing | 2005 |
| Autosmart International Ltd | Manufacturing | 1978 |
| Autotek (Lichfield) Limited | Wholesale & retail | 2006 |
| Avanti Heath Limited | Administrative & support | 2024 |
| Aventus Digital Media Ltd | Professional & scientific | 2025 |
| Aviari Ltd | Other services | 2022 |
| Avoco UK Limited | Information & communication | 2005 |
| Avoir Interiors Limited | Wholesale & retail | 2020 |
| Avoir Online Ltd | Wholesale & retail | 2024 |
| AVR Automotive Ltd | Wholesale & retail | 2023 |
| AVS Entertainment Ltd | Professional & scientific | 2025 |
| AW Group Consulting Engineers Ltd | Professional & scientific | 2021 |
| AW Group Investments Ltd | Real estate | 2023 |
| Awake Awareness CIC | Health & social care | 2025 |
| Axiombridge (Holdings) Ltd | Financial services | 2017 |
| Axis Maps Limited | Information & communication | 2012 |
| Axlgift Ltd | Transport & logistics | 2025 |
| AXP Logistics Ltd | Transport & logistics | 2023 |
| AYU (UK) Ltd | Other services | 2011 |
| B P C Estates Limited | Real estate | 1996 |
| B-Sure Safety and Electrical Solutions Limited | Construction | 2006 |
| B. Tipper Ltd | Construction | 2023 |
| B.A.R Electrical Limited | Construction | 2025 |
| B.B.D. Property and Leisure Limited | Households | 1997 |
| B.I.S. Properties Limited | Real estate | 1996 |
| B.P.K. Developments Limited | Construction | 1999 |
| B.R. Whorton Transport Limited | Real estate | 1974 |
| B16 Studios Ltd | Construction | 2020 |
| B314ZDA Ltd | Transport & logistics | 2018 |
| B6 Building Limited | Real estate | 2014 |
| Backpass Productions Limited | Extraterritorial | 2025 |
| BAD Apple Productions Limited | Information & communication | 2006 |
| BAD Flowers Music Ltd | Arts & recreation | 2018 |
| BAD Monkey Tattoo Ltd | Other services | 2024 |
| Baddeley Property Maintenance Ltd | Construction | 2026 |
| Baddesley Wharf Limited | Professional & scientific | 2014 |
| Bagshaw Developments Limited | Construction | 2024 |
| Bailey Contracting Ltd | Information & communication | 2019 |
| Bakes With Benefits Ltd | Wholesale & retail | 2025 |
| Ballard Business Recovery Limited | Professional & scientific | 2020 |
| Ballard Engineering Limited | Manufacturing | 1999 |
| Ballard Investment Holdings Limited | Financial services | 2021 |
| Balmus Auto Limited | Transport & logistics | 2015 |
| Banner Technologies Ltd | Information & communication | 2012 |
| Barbers Lounge Lichfield Ltd | Other services | 2013 |
| Barcliffe Mews Management Company Limited | Real estate | 2013 |
| Bardell Associates Limited | Professional & scientific | 2016 |
| Bargain Restaurants Wholesalers 786 Ltd | Wholesale & retail | 2022 |
| Bark and Balloon Ltd | Hospitality | 2026 |
| Barklay Holdings Ltd | Extraterritorial | 2018 |
| Barklay Properties Ltd | Real estate | 2007 |
| Barringtons Limited | Professional & scientific | 2001 |
| Barton Imperial Chef Ltd | Hospitality | 2018 |
| BAS Regional Ltd | Professional & scientific | 2022 |
| Base Van Modifications Ltd | Wholesale & retail | 2025 |
| BASE8 Limited | Information & communication | 2012 |
| Bassford Financial Services Limited | Financial services | 2024 |
| Bateman Partners Ltd | Professional & scientific | 2014 |
| Bates Construction Limited | Construction | 2026 |
| Bathroom Barn (Lazz) Limited | Wholesale & retail | 2016 |
| Baumyce Ltd | Transport & logistics | 2019 |
| Bavarian Rebuilds Limited | Wholesale & retail | 2025 |
| Baxters (Properties) Limited | Financial services | 1933 |
| Baxters Developments Limited | Administrative & support | 2006 |
| Baylis House Limited | Hospitality | 2000 |
| Bayliss GAS Services Limited | Construction | 2018 |
| BB Consultancy Ltd | Professional & scientific | 2023 |
| BB Reeds & Music Ltd | Education | 2024 |
| BB Studio London Ltd | Other services | 2021 |
| Bcomp 527 Limited | Professional & scientific | 2018 |
| BCS Midlands Ltd | Construction | 2021 |
| BCS Properties Midlands Ltd | Other services | 2026 |
| BDE Technology Ltd | Administrative & support | 2023 |
| Bdveritas Limited | Professional & scientific | 2016 |
| BE Brave Media Limited | Professional & scientific | 2019 |
| BE Leen Limited | Professional & scientific | 2014 |
| BE YOU Wellbeing Ltd | Other services | 2023 |
| Beacon Business Consultants Ltd | Professional & scientific | 2020 |
| Beacon Court (Lichfield) Management Company Limited | Real estate | 2006 |
| Beacon IT Solutions Limited | Information & communication | 2020 |
| Beacon Learning and Performance Ltd | Other services | 2016 |
| Beacon Metals Limited | Extraterritorial | 1976 |
| Beacon Park Bowling Greens Maintenance Company Ltd | Arts & recreation | 2019 |
| Beacon Quality Limited | Professional & scientific | 2026 |
| Beacon Street Management Company Limited | Households | 2004 |
| Bealglen Limited | Manufacturing | 1988 |