| A.S.R Garage Ltd | Wholesale & retail | 2025 |
| A.S.R Motor Repair Limited | Wholesale & retail | 2026 |
| A.T.A.S Express Ltd | Wholesale & retail | 2020 |
| A.W.L. Holdings Limited | Extraterritorial | 1999 |
| Aadya Enterprises Ltd | Manufacturing | 2026 |
| Aaref Realty Ltd | Real estate | 2022 |
| Aaron Galbraith Golf Limited | Arts & recreation | 2014 |
| Aasha Properties Ltd | Real estate | 2024 |
| Aashirwad Kent Properties Ltd | Real estate | 2019 |
| Aavaas Group Limited | Real estate | 2024 |
| Aavr Solutions Ltd | Wholesale & retail | 2020 |
| Abbey Print (Faversham) Limited | Professional & scientific | 2020 |
| Abigail Beattie Translations Ltd | Professional & scientific | 2014 |
| Able Clean (South East) Limited | Other services | 2018 |
| Able Fabrications Limited | Manufacturing | 2010 |
| Able Maintain Limited | Other services | 2018 |
| Absolute Building and Design Solutions Ltd | Construction | 2025 |
| Academy FM Thanet | Information & communication | 2009 |
| Accountancy Matters (Kent) Limited | Professional & scientific | 2007 |
| Ace Glow Beauty and Aesthetics Ltd | Other services | 2026 |
| ACJ Optical Locum Services Limited | Professional & scientific | 2026 |
| Acorn Domestic Repairs Limited | Construction | 2007 |
| Acorn Financial Services (South East) Limited | Financial services | 2007 |
| Acorn Homes (Group) Limited | Administrative & support | 2012 |
| Acorn Homes (Kent) Ltd | Other services | 2009 |
| Acorn Homes (UK) Limited | Health & social care | 1997 |
| Action Property Limited | Real estate | 2015 |
| Action Vape Ltd | Wholesale & retail | 2020 |
| Action Wall Ties Ltd. | Construction | 1998 |
| Active Tackle Limited | Manufacturing | 2013 |
| AD Property Projects Ltd | Real estate | 2025 |
| Adam James Securities Limited | Households | 1991 |
| ADAMSPLAYHOUSE2011 Ltd | Hospitality | 2024 |
| Addheat Plumbing & Heating Limited | Construction | 2019 |
| ADH Scaffolding LLP | | 2003 |
| ADI Bespoke Woodwork Ltd | Manufacturing | 2024 |
| Adjust Property Limited | Construction | 2022 |
| Adlam Accountancy Services Limited | Professional & scientific | 2012 |
| Admiral JET Ltd | Transport & logistics | 2020 |
| Admiralty House Property Management Ltd | Households | 2020 |
| Adrem Industrial Maintenance and Cleaning Limited | Administrative & support | 1971 |
| Adrian Smith Associates Limited | Transport & logistics | 2002 |
| Advance Security Limited | Manufacturing | 2024 |
| Advantage Catalyst Ltd | Professional & scientific | 2026 |
| Advantage Group Ltd | Financial services | 2024 |
| Advantage Track Services Ltd | Construction | 2021 |
| Advantage Training Services Ltd | Construction | 2022 |
| Adventurerowing Limited | Transport & logistics | 2011 |
| Aero JET Management Limited | Transport & logistics | 2023 |
| Aerolift Limited | Other services | 2022 |
| Aesthetic Precision Ltd | Health & social care | 2022 |
| AF2024 Limited | Other services | 2003 |
| AG Executive Travel Ltd | Administrative & support | 2023 |
| Agent Assist Ltd | Professional & scientific | 2020 |
| AGM Network Consultancy Ltd | Information & communication | 2016 |
| Agon Martial Arts Ltd | Arts & recreation | 2026 |
| Aiding Independence Ltd | Health & social care | 2006 |
| Aiding Sophie Limited | Financial services | 2024 |
| Air Decorators Limited | Construction | 2023 |
| Air Global Holdings Limited | Transport & logistics | 2016 |
| Airvive Limited | Wholesale & retail | 2019 |
| Aiwa Communications Ltd | Professional & scientific | 2025 |
| AJ Construction & Carpentry Limited | Construction | 2026 |
| AJM Storage and Distribution Limited | Transport & logistics | 2025 |
| Akssk Limited | Other services | 2024 |
| Akte Services Ltd | Construction | 2016 |
| AL Hasani Limited | Health & social care | 2025 |
| Al-Hayat Courier&Cargo Ltd | Transport & logistics | 2017 |
| Alaska Commerce Ltd | Wholesale & retail | 2025 |
| Alaturka Ramsgate Ltd | Hospitality | 2018 |
| Albert & COX Ltd | Hospitality | 2016 |
| Albion Court Management Company Limited | Households | 2001 |
| Albion House Consultancy Limited | Professional & scientific | 2019 |
| Albion Link (Residents) Management Limited | Households | 1986 |
| Alchemy by SW Ltd | Wholesale & retail | 2023 |
| Alchemy Corp Limited | Manufacturing | 2022 |
| Alchemy Signature Ltd | Wholesale & retail | 2023 |
| ALE House in the Middle of the Street Ltd | Hospitality | 2022 |
| Alert Plumbing and Heating Ltd | Construction | 2010 |
| Alert Plumbing Services Ltd | Construction | 2005 |
| Ales & Antiques Ltd | Hospitality | 2021 |
| Alexander Engineering Co Ltd | Wholesale & retail | 2019 |
| Alexander Sharpe Ltd | Professional & scientific | 2019 |
| Alexander Trast Ltd | Real estate | 2020 |
| Algo Thanet Limited | Administrative & support | 2025 |
| Alika Music Ltd | Information & communication | 2024 |
| Alka Engineering & Construction Ltd | Construction | 2022 |
| ALL About Science Ltd | Manufacturing | 2024 |
| ALL About SEN Kent Limited | Education | 2025 |
| ALL Types Construction Limited | Construction | 2021 |
| All-Star Freight Solutions Ltd | Transport & logistics | 2025 |
| ALL4PICKLEBALL CIC | Arts & recreation | 2025 |
| Allan's Property Company Limited | Households | 2009 |
| Allen Group Holdings Ltd | Financial services | 2025 |
| Alley Bar Bar CIC | Hospitality | 2025 |
| Alliance Netserve Limited | Administrative & support | 2006 |
| Allied Trades. Construction and Demolition Services Ltd | Construction | 2024 |
| Alma PIC Ltd | Real estate | 2025 |
| Almersa Limited | Real estate | 2020 |
| Alpcast Limited | Administrative & support | 1997 |