| Avondale Environmental Services Limited | Agriculture & fishing | 1994 |
| Avora Group Limited | Wholesale & retail | 2025 |
| AVR Law Limited | Professional & scientific | 2026 |
| Avro Court RTM Company Ltd | Households | 2025 |
| Avva Capital Ltd | Real estate | 2026 |
| AWE Estates Ltd | Real estate | 2025 |
| Aweconcepts Ltd | Hospitality | 2020 |
| Awooze Technology Group Limited | Other services | 2016 |
| Axia Consulting Limited | Information & communication | 1994 |
| Axion Infra Ltd | Construction | 2025 |
| Axis Collective Ltd | Wholesale & retail | 2014 |
| AXJ Fitness Limited | Other services | 2024 |
| Aybeproperties Limited | Real estate | 2024 |
| Aydin Properties and Investments Ltd | Real estate | 2024 |
| Aylesford Fire and Security Ltd | Construction | 2018 |
| Azatek Corporation Ltd | Wholesale & retail | 2025 |
| Azimi Holding Limited | Financial services | 2026 |
| Azimuth Logistics Ltd | Transport & logistics | 2025 |
| Azimuth Solution Ltd | Information & communication | 2025 |
| Azure Care Ltd | Health & social care | 2019 |
| Azure Group Consulting Limited | Professional & scientific | 2019 |
| Azure Property Services Ltd | Real estate | 2022 |
| Azymus Consulting Ltd | Information & communication | 2019 |
| Azymus Estates Ltd | Real estate | 2021 |
| B & D Parker Limited | Construction | 2014 |
| B & M Cook Transport Limited | Transport & logistics | 2001 |
| B & M Specialists Ltd | Wholesale & retail | 2021 |
| B a K Consult Limited | Construction | 2012 |
| B and H Automotive Ltd | Wholesale & retail | 2025 |
| B and P Services Limited | Construction | 2019 |
| B Bespoke Wardrobes Limited | Manufacturing | 2025 |
| B C Property Kent Ltd | Real estate | 2025 |
| B C Vehicle & Plant Hire Limited | Administrative & support | 2014 |
| B E Martin & Sons Limited | Construction | 2002 |
| B Hughes Consulting Limited | Professional & scientific | 2015 |
| B L Phillips Electrical (Surrey) Ltd | Construction | 2021 |
| B R Pusser & Co Estates Ltd | Real estate | 2021 |
| B Rixson Plumbing Services Limited | Construction | 2001 |
| B Sinha Limited | Health & social care | 2014 |
| B Sleepy Ltd | Wholesale & retail | 2023 |
| B&J Real Estate Ltd | Real estate | 2025 |
| B&Telectrical&Builders Ltd | Construction | 2025 |
| B&W Diamond CUT Limited | Other services | 2016 |
| B.A. Hot Wire Ltd | Construction | 2016 |
| B.Rowlinson Ltd | Construction | 2025 |
| B.S.B. (GB) Limited | Administrative & support | 2003 |
| B.V.M Logistics Ltd | Transport & logistics | 2013 |
| B2B Online Ltd | Information & communication | 2020 |
| BA Aesthetic Kent Ltd | Health & social care | 2023 |
| Baabaa BSC Limited | Real estate | 2023 |
| Baae Manufacturing Skills Hub Ltd | Professional & scientific | 2018 |
| Baanik Ltd | Wholesale & retail | 2021 |
| Baas Global Ltd | Information & communication | 2012 |
| Baba and SON Property Ltd | Real estate | 2024 |
| Babs RMN Limited | Health & social care | 2023 |
| Baby Attire Ltd | Wholesale & retail | 2026 |
| Babyb Recordings Ltd | Education | 2026 |
| Back to Nature Burials Ltd | Other services | 2022 |
| Back to Nature Events Limited | Hospitality | 2022 |
| Backstage Warehouse Limited | Construction | 2010 |
| BAD Bucket Limited | Information & communication | 2026 |
| Badger Building Services Limited | Construction | 2019 |
| Badii Catalin Ltd | Transport & logistics | 2015 |
| Bagel and Pastries Ltd | Manufacturing | 2024 |
| Bailey & Bailey Limited | Professional & scientific | 2026 |
| Baines Care Limited | Health & social care | 2018 |
| Baja Beats UK Ltd | Arts & recreation | 2020 |
| Bajolmedicals Ltd | Health & social care | 2023 |
| BAK Private Sourcing Ltd | Real estate | 2026 |
| Bakers Employment Law Limited | Professional & scientific | 2026 |
| Bakerwood Holdings Ltd | Financial services | 2025 |
| Baktec (UK) Limited | Wholesale & retail | 1992 |
| Balance & Bloom Accounting Ltd | Professional & scientific | 2025 |
| Balance Wellness Care Ltd | Health & social care | 2026 |
| Balanced Books (Kent) Ltd | Professional & scientific | 2024 |
| Balfour Convenience Store Ltd | Wholesale & retail | 2024 |
| Ball Nation Ltd | Education | 2020 |
| Ballpoint Digital Marketing Agency Ltd | Professional & scientific | 2025 |
| Balocorp Holdings Ltd | Administrative & support | 2025 |
| Balson Hvac Services Ltd | Construction | 2021 |
| Baltic Procurement Solutions Ltd | Professional & scientific | 2022 |
| Bamber Garage Limited | Administrative & support | 2008 |
| Bana Fresh Market Ltd | Wholesale & retail | 2020 |
| Bangar Property Developers Ltd | Construction | 2011 |
| Bangcollective Ltd | Information & communication | 2025 |
| Banmot Limited | Wholesale & retail | 2025 |
| Barakah Khair Holdings Ltd | Financial services | 2025 |
| Barakah Oral Care Ltd | Health & social care | 2025 |
| Bargain Road UK Ltd | Wholesale & retail | 2017 |
| Barham & District Motorcycle Club | Arts & recreation | 2010 |
| Bark and Whiskers Pet Grooming Ltd | Administrative & support | 2017 |
| Barker & Co Holdings Ltd | Construction | 2026 |
| Barker Homes & Property Developments Limited | Real estate | 2021 |
| Barming Blitzing Cleaning Company Ltd | Administrative & support | 2026 |
| Barnett Property Management Ltd | Real estate | 2024 |
| Barode Services Limited | Professional & scientific | 2021 |
| Baron's Estates Limited | Real estate | 2020 |
| Barrett Controls Engineering Ltd | Construction | 2006 |
| Barry Hills Consulting Ltd | Professional & scientific | 2012 |
| Barrymug Limited | Administrative & support | 2018 |