| AZ Erin Ltd | Wholesale & retail | 2018 |
| AZ Joinery Ltd | Manufacturing | 2015 |
| AZD Car Wash Company Ltd | Wholesale & retail | 2026 |
| AZD Tyres and Garage Ltd | Wholesale & retail | 2026 |
| Azeem Online Ltd | Wholesale & retail | 2024 |
| Azel Moroccan Rituals Ltd | Wholesale & retail | 2025 |
| Azguard Electrical Services Ltd | Construction | 2022 |
| Aztec Contractors Limited | Other services | 2008 |
| Aztec Security Systems Limited | Manufacturing | 2005 |
| Azurian Capital Limited | Financial services | 2011 |
| B & E Venture (UK) Limited | Construction | 2013 |
| B & W Products Limited | Wholesale & retail | 2002 |
| B Cheema Transport Ltd | Transport & logistics | 2016 |
| B Dhanda Ltd | Transport & logistics | 2023 |
| B E Mechanical Consultancy Ltd | Construction | 2022 |
| B J Vigo Limited | Wholesale & retail | 2008 |
| B Pitt Developments Ltd | Real estate | 2020 |
| B Pitt Services Ltd | Other services | 2016 |
| B&B Integrated Services Limited | Transport & logistics | 2025 |
| B&D Building and Design Ltd | Construction | 2022 |
| B&Rr TEX Ltd | Wholesale & retail | 2026 |
| B-Squared Beer Ltd | Wholesale & retail | 2016 |
| B. & R. Cars Limited | Transport & logistics | 1982 |
| B.C.Optimax Ltd | Construction | 2020 |
| B.S Grocery Limited | Wholesale & retail | 2021 |
| B.Sama Ltd | Construction | 2019 |
| B2B Networking (Gravesham) Limited | Professional & scientific | 2025 |
| B4BEST Services Ltd | Construction | 2022 |
| Baanab Community Collective C.I.C. | Education | 2025 |
| Baaz Contracts Limited | Construction | 2020 |
| Baaz Haulage Group Ltd | Transport & logistics | 2023 |
| Baba KA HUT Limited | Wholesale & retail | 2025 |
| Babson Care Limited | Health & social care | 2014 |
| Back to the Roots Gravesend Ltd | Administrative & support | 2020 |
| Backbone Media Ltd | Professional & scientific | 2025 |
| Badgers Hill Farm Payroll Ltd | Other services | 2012 |
| Badgers Hill Garden Centre Ltd | Wholesale & retail | 2020 |
| Badgers Hill Holdings Ltd | Other services | 2023 |
| Badilatrans Ltd | Transport & logistics | 2018 |
| BAG Shop & Accessories Limited | Wholesale & retail | 2025 |
| Bagh Limited | Hospitality | 2017 |
| BAGI1 Ltd | Hospitality | 2021 |
| Bains Roadways Ltd | Transport & logistics | 2023 |
| Bains Screeding & Construction Ltd | Construction | 2025 |
| Bajii Consulting Ltd | Professional & scientific | 2021 |
| Bajwa Security Solution Limited | Administrative & support | 2022 |
| Bake Bistro Ltd | Hospitality | 2019 |
| Bake Boss Limited | Hospitality | 2015 |
| Baked by JHO Ltd | Manufacturing | 2023 |
| Bakehouse on the Green Limited | Hospitality | 2025 |
| Baker Asset Management UK Ltd | Real estate | 2022 |
| Baker Commercial Property Limited | Real estate | 2022 |
| Baker Scaffolding (UK) Ltd | Construction | 2014 |
| Baklava Box Ltd | Wholesale & retail | 2021 |
| BAL Investment Group Ltd | Real estate | 2025 |
| Balaji Private Ltd | Hospitality | 2025 |
| Balazilq Ltd | Wholesale & retail | 2025 |
| Bale HV & LV Jointing Services Ltd | Construction | 2026 |
| Balkans Construction Ltd | Administrative & support | 2016 |
| Balloon D'Or Limited | Wholesale & retail | 2021 |
| Baloxx Cargo Logistics Ltd | Transport & logistics | 2022 |
| Baltik Shop Ltd | Wholesale & retail | 2022 |
| Baltowski Ltd | Transport & logistics | 2016 |
| Bamilad Technologies Ltd | Information & communication | 2014 |
| Bansil Service Charge Consultants Ltd | Professional & scientific | 2013 |
| Banwait Associates Ltd | Other services | 2016 |
| Bany Ltd | Health & social care | 2026 |
| Bapu Tere Karke Ltd | Real estate | 2025 |
| Barber House 153 Ltd | Other services | 2023 |
| Barbers & Hairdressers Ltd | Other services | 2009 |
| Bards Shellfish LLP | | 2009 |
| Bardys Catering Ltd | Wholesale & retail | 2016 |
| Bare Beauty Studio Ltd | Other services | 2025 |
| Barefoot Conservation Limited | Professional & scientific | 2012 |
| Barika Intelligence Limited | Information & communication | 2025 |
| Barnard Technology Ltd | Information & communication | 2016 |
| Barnes Woodfield Limited | Construction | 2004 |
| Barracks Group Ltd | Construction | 2022 |
| Barracks Homes Ltd | Real estate | 2025 |
| Barrett & Co. Limited | Manufacturing | 1995 |
| Barrett Print for Schools Limited | Manufacturing | 2012 |
| Barricus Ltd | Construction | 2026 |
| Barthandyman Ltd | Construction | 2019 |
| Bartim Fisheries Ltd | Agriculture & fishing | 2020 |
| Bartlett Consultants Ltd | Real estate | 2024 |
| Barty's Group Ltd | Construction | 2024 |
| Baruchi Limited | Wholesale & retail | 2015 |
| Base Sólida Limited | Construction | 2025 |
| Basement Bakehouse Ltd | Manufacturing | 2024 |
| Basha Properties Ltd | Real estate | 2021 |
| Basil’S Botanicals Limited | Manufacturing | 2018 |
| Basra Holdings Ltd | Construction | 2019 |
| Basradechauffeur Ltd | Transport & logistics | 2025 |
| Bassant PM Ltd | Construction | 2026 |
| Bassi Developments Limited | Real estate | 2023 |
| Batcheldor Ltd | Information & communication | 2008 |
| Bath Spa Holiday Lets Ltd | Real estate | 2016 |
| Batkanu Export Ltd | Wholesale & retail | 2025 |
| Bay Tree House Group Ltd | Health & social care | 2020 |
| Bayenx Ltd | Transport & logistics | 2026 |