| Avoca Systems Ltd. | Extraterritorial | 1995 |
| Avon Estates (Stratford) LLP | | 2009 |
| Avon Freight Group Limited | Transport & logistics | 1982 |
| Avon Tyre Services Ltd | Wholesale & retail | 2025 |
| Avonbridge Conservatories & Windows Ltd | Construction | 2001 |
| Avoncroft Joinery Limited | Manufacturing | 2002 |
| Avonside Developments Limited | Construction | 2022 |
| Avonside Homes Limited | Construction | 2021 |
| Avonside Safety Management Limited | Professional & scientific | 1999 |
| AW Marketplace Ltd | Wholesale & retail | 2026 |
| AW Read Limited | Wholesale & retail | 2003 |
| Award Property Services Ltd | Construction | 2025 |
| Axelrod Property Ltd | Real estate | 2022 |
| Axford Vehicle Sourcing Ltd | Wholesale & retail | 2026 |
| Axiom Breach Ltd | Administrative & support | 2024 |
| Axion Trans Ltd | Transport & logistics | 2025 |
| Axium Global Limited | Professional & scientific | 2025 |
| Axle Group Limited | Wholesale & retail | 2001 |
| Aybl Group Limited | Financial services | 2021 |
| B & N Construction Limited | Construction | 2023 |
| B C Jeavons Ltd | Construction | 2018 |
| B G 2014 Limited | Administrative & support | 2014 |
| B M Perrins Livestock Limited | Agriculture & fishing | 2012 |
| B P Tiling Limited | Construction | 2003 |
| B Warm E/S Ltd | Construction | 2014 |
| B&H Interior Contracts Limited | Construction | 2022 |
| B-Group Holdings Limited | Financial services | 2024 |
| B-Minor Ltd | Information & communication | 2018 |
| B-Smart Living Ltd | Real estate | 2024 |
| B-Trans Midlands Ltd | Transport & logistics | 2021 |
| B. Eco Maternity Services Limited | Health & social care | 2024 |
| B. Evans & SON Limited | Construction | 1996 |
| B. Hepworth and Company Holdings Limited | Financial services | 2025 |
| B. Hepworth and Company Limited | Manufacturing | 1981 |
| B.G. Elvins Limited | Construction | 1995 |
| B.M.S. Holdings Limited | Real estate | 2006 |
| B.Thomas Flowers Limited | Wholesale & retail | 2023 |
| B14 Minis Ltd | Wholesale & retail | 2020 |
| BA Andreou & Co Ltd | Health & social care | 2018 |
| Bach Properties Ltd | Real estate | 2025 |
| Bagworld Bespoke Bags Ltd | Manufacturing | 2017 |
| Bailey Electrical Services Ltd | Construction | 2025 |
| Bailey Stainless Pipework Limited | Construction | 2017 |
| Bainbridge Optometrists Limited | Wholesale & retail | 2019 |
| Bains Lagah 28 Ltd | Real estate | 2024 |
| Bake My Day (Midlands) Ltd | Hospitality | 2022 |
| Baker & Co Commercial Ltd | Hospitality | 2018 |
| Baker & Co. Birmingham Limited | Hospitality | 2018 |
| Baker & Co. Depot Ltd | Hospitality | 2021 |
| Baker & Co. Holdings Limited | Financial services | 2018 |
| Baker & Co. Oxford Limited | Hospitality | 2023 |
| Baker & Co. Retail Ltd | Hospitality | 2015 |
| BAL (Aluminium) Limited | Manufacturing | 2014 |
| BAL (Automotive) Limited | Professional & scientific | 2014 |
| Balaj Red Ltd | Wholesale & retail | 2023 |
| Balanced Audio Ltd | Manufacturing | 2025 |
| Balfourt Ltd | Professional & scientific | 2024 |
| Bamaluz Consulting Limited | Information & communication | 2013 |
| Bank Bar and Cafe Limited | Hospitality | 2022 |
| Bank Motor Cycles Ltd | Wholesale & retail | 2019 |
| Bank Solicitors Limited | Professional & scientific | 2013 |
| Banyard Holdings Limited | Information & communication | 2021 |
| Bar Code Express Limited | Information & communication | 2004 |
| Barber Q Limited | Professional & scientific | 2003 |
| Bare Beauty and Aesthetics Clinic Ltd | Other services | 2024 |
| Barford Executive Cars Ltd | Wholesale & retail | 2023 |
| Bargainz Ltd | Wholesale & retail | 2024 |
| Barlodge Limited | Manufacturing | 1976 |
| Barnes Recruitment Ltd | Administrative & support | 2021 |
| Barsas Ltd | Transport & logistics | 2011 |
| Bartleet Estate Management Limited | Real estate | 2007 |
| Bartles Wood Management Ltd | Households | 2018 |
| Barton Bodyworks Limited | Wholesale & retail | 2013 |
| BASE24 Property Ltd | Construction | 2024 |
| Bassmere Limited | Real estate | 2022 |
| Batchley Spice Ltd | Hospitality | 2014 |
| Batchley Support Group - Redditch Communities | Health & social care | 2003 |
| Batchleytopshop Ltd | Wholesale & retail | 2023 |
| Batchwood Group Ltd | Real estate | 2026 |
| Bates Property Ltd | Real estate | 2025 |
| Bath Voyage Prive Limited | Wholesale & retail | 2025 |
| Bauer Life Sciences Limited | Professional & scientific | 2010 |
| Bayleys Bathrooms Ltd | Construction | 2023 |
| Bayleys Plumbing & Heating Services Ltd | Manufacturing | 2001 |
| Baylis & Harding Public Limited Company | Manufacturing | 1978 |
| Baylis Engineering Ltd | Professional & scientific | 2026 |
| Bayside Hospitality Services Limited | Hospitality | 2004 |
| Bayswater Investments Ltd | Real estate | 2016 |
| BB Visioncare Ltd | Wholesale & retail | 2007 |
| Bbtv Limited | Information & communication | 1995 |
| Bc&S Services Ltd | Construction | 2022 |
| Bcgh Limited | Information & communication | 2025 |
| BCM Brewing Company Ltd | Manufacturing | 2019 |
| BDA Management Ltd | Other services | 2022 |
| BDC Bidco 71 Limited | Financial services | 2016 |
| BDC KW Bifolds Limited | Construction | 2018 |
| BDC Midco 71 Limited | Financial services | 2016 |
| BDC Topco 71 Limited | Financial services | 2016 |
| Bdgames Ltd | Education | 2009 |
| BE Appy Limited | Information & communication | 2013 |