| 13A Station Road Management Company Limited | Households | 2024 |
| 20-26 Lambs Conduit Street (Management) Limited | Real estate | 2007 |
| A J Vehicle Engineers Limited | Administrative & support | 2009 |
| Abbott Design Studio Ltd | Professional & scientific | 2018 |
| Abbotts Holdings Limited | Real estate | 2009 |
| Abel Crescent Estates Limited | Construction | 1986 |
| Abel Holdings Limited | Financial services | 1982 |
| Abel Property Development Limited | Real estate | 1996 |
| Abel Property Group Limited | Financial services | 2005 |
| Acacia Distributors Limited | Wholesale & retail | 1991 |
| ACCESS2ADVENTURE CIC | Education | 2022 |
| Accipitrine Consulting Limited | Professional & scientific | 2009 |
| ACP Electrical and Testing Limited | Construction | 2025 |
| Adair Aviation Support Limited | Professional & scientific | 2015 |
| ADN Roofing Ltd | Other services | 2017 |
| Advanced Nutrition Limited | Manufacturing | 1988 |
| Adventures With Agile Limited | Professional & scientific | 2015 |
| Agile Landscapes Limited | Administrative & support | 2021 |
| Air Engineering Group Ltd | Manufacturing | 2000 |
| Air Engineering Systems Limited | Construction | 1991 |
| Aithena Limited | Information & communication | 2024 |
| AJO IL Corner Italiano Limited | Hospitality | 2022 |
| Alexis Salvesen Ltd. | Manufacturing | 2013 |
| ALL Gardens Great & Small Ltd | Professional & scientific | 2022 |
| ALL Things Bookkeeping Limited | Professional & scientific | 2023 |
| Almit Limited | Other services | 2007 |
| Amadeus Advisory Limited | Administrative & support | 2022 |
| Amber Scott Yoga Ltd | Other services | 2023 |
| Amizah Estate Limited | Real estate | 2020 |
| AN Engineering Ltd | Professional & scientific | 2014 |
| Andrew Parr Products Ltd | Information & communication | 2018 |
| Andrew Parr Training Ltd | Education | 2013 |
| Anika Spice Limited | Hospitality | 2018 |
| ANP Education Ltd | Education | 2022 |
| Anstey Thomas Limited | Administrative & support | 2018 |
| AP Sports Retail Limited | Wholesale & retail | 2025 |
| Applied Equine Behaviour Ltd | Extraterritorial | 2015 |
| Arding Marketing Limited | Wholesale & retail | 1951 |
| Argon Services UHV Limited | Manufacturing | 2017 |
| ARK Psychotherapy Services Ltd | Health & social care | 2021 |
| Art Barbers/ Forest ROW Limited | Other services | 2026 |
| Arwyn Phoenix Limited | Hospitality | 2024 |
| Asa's Synergy Services Limited | Agriculture & fishing | 2025 |
| Ashbourne Place Management Company Limited | Households | 2004 |
| Ashdown Academy Ltd | Education | 2012 |
| Ashdown Lettings & Property Management Limited | Administrative & support | 2010 |
| Ashdown Medical Services Limited | Health & social care | 2013 |
| Ashdown Mews Management Company Limited | Real estate | 2013 |
| Ashdown Park (Sussex) Limited | Hospitality | 1992 |
| Ashdown Place Drive Limited | Households | 2015 |
| Ashdown Projects Limited | Information & communication | 2007 |
| Ashdown Properties Limited | Real estate | 2021 |
| Ashen Page Ltd | Information & communication | 2024 |
| Aspiring Training Limited | Administrative & support | 2012 |
| Association of Naturopathic Practitioners | Health & social care | 2001 |
| Atlascedar LLP | | 2019 |
| Atomd'Or Ltd | Households | 2021 |
| Auxera Solutions Limited | Administrative & support | 2026 |
| AVC Consulting Limited | Administrative & support | 2023 |
| AVG Property Limited | Real estate | 2017 |
| B J Babb (Speldhurst) Limited | Construction | 2020 |
| B J Babb (Tanyard) Limited | Construction | 2022 |
| B-Pak Automation Limited | Manufacturing | 2016 |
| B.J. Babb Limited | Construction | 1998 |
| B.Yond Group Limited | Construction | 2022 |
| B.Yond Homes Limited | Construction | 2003 |
| B.Yond Strategic Limited | Construction | 2022 |
| Bando Studios Ltd | Information & communication | 2022 |
| Bathshield (U.K.) Limited | Wholesale & retail | 1991 |
| Baxter Ironwork Limited | Construction | 2000 |
| Bazaar Traders Limited | Administrative & support | 2019 |
| Beacon Plant Hire (Southern) Limited | Administrative & support | 2007 |
| Beacon Worldwide Ltd | Information & communication | 2014 |
| Bennix Plumbing and Heating Ltd | Other services | 2016 |
| Bens Gutters Commercial Ltd | Administrative & support | 2020 |
| Bens Gutters Holdings Ltd | Real estate | 2020 |
| Bens Gutters Limited | Administrative & support | 2010 |
| Best Care Products Ltd. | Health & social care | 1997 |
| Better Edspace Limited | Education | 2024 |
| Beyondtropics Ltd | Agriculture & fishing | 2024 |
| Big Fish Bay Ltd | Information & communication | 2025 |
| Biowoods Ltd | Administrative & support | 2009 |
| Birchwood Limited | Construction | 2024 |
| Bisley Contracting Ltd | Construction | 2007 |
| Blades Biological Limited | Administrative & support | 2002 |
| Blake & Gates Limited | Construction | 2022 |
| Blue Kairos Limited | Professional & scientific | 2006 |
| Blush and Beautyful Ltd | Other services | 2022 |
| BOB Sumpter Transport Limited | Transport & logistics | 2017 |
| Bokell Associates Limited | Professional & scientific | 2013 |
| Bolshov Group Ltd | Construction | 2023 |
| Bombay Boho Limited | Extraterritorial | 2015 |
| Booth Design & Build Ltd | Construction | 2023 |
| Bower Lane Limited | Construction | 2021 |
| Bowker Consulting Limited | Education | 1997 |
| BPP Consulting LLP | | 2012 |
| Brambletye Fruit Farm Ltd | Agriculture & fishing | 2005 |
| Brambletye Landscapes Ltd | Administrative & support | 2014 |
| Brly Limited | Financial services | 2022 |
| Brodski Ltd | Real estate | 2023 |