| 9 Carlton AVE (Freehold) Ltd | Real estate | 2018 |
| 9 Carlton Avenue RTM Company Limited | Households | 2006 |
| 9-12 Lion Yard Management (Faversham) RTM Company Limited | Real estate | 2024 |
| A & M Bro’S Ltd | Wholesale & retail | 2024 |
| A & N Investment Kent Ltd | Financial services | 2024 |
| A B C Consultancy Ltd | Administrative & support | 2009 |
| A B C Health & Safety Limited | Professional & scientific | 2003 |
| A Bajwa Traders Ltd | Wholesale & retail | 2025 |
| A Bare C Ltd | Manufacturing | 2025 |
| A C Hulme and Sons | Agriculture & fishing | 1964 |
| A C Hulme and Sons Farming Limited | Financial services | 2019 |
| A C Lettings Limited | Real estate | 2017 |
| A Clubb Rail Limited | Manufacturing | 2016 |
| A D V Canterbury Limited | Health & social care | 2008 |
| A G & H T Miles Limited | Agriculture & fishing | 2011 |
| A G of C Limited | Professional & scientific | 2019 |
| A Goddard & SON LLP | | 2026 |
| A H Mortley Opticians Limited | Wholesale & retail | 2012 |
| A Horizon Homes Limited | Real estate | 2025 |
| A Plus Air-Conditioning Ltd | Construction | 2025 |
| A Robson Ltd | Other services | 2022 |
| A Silver Lining Ltd | Education | 2014 |
| A Thirsty Habit Ltd | Manufacturing | 2020 |
| A Vine Flowers & Greens Ltd | Wholesale & retail | 2022 |
| A Y E-Commerce Ltd | Wholesale & retail | 2025 |
| A&C Online Shop Ltd | Wholesale & retail | 2023 |
| A&D Cleaning Solutions Ltd | Administrative & support | 2020 |
| A&K Retailer Ltd | Wholesale & retail | 2024 |
| A&K Store Limited | Wholesale & retail | 2024 |
| A-Plus Courier Services Ltd | Transport & logistics | 2022 |
| A-R-K-H-I-V-E X Ltd | Arts & recreation | 2022 |
| A.B. Crush (Panelcraft) Limited | Wholesale & retail | 1991 |
| A.B.V Bars Limited | Hospitality | 2004 |
| A.D.M.I Doors Limited | Construction | 2011 |
| A.E. (Estate Developers) Limited | Other services | 1936 |
| A.Mcmanus(Deal) | Real estate | 1965 |
| A.T.S. Auto's Ltd | Wholesale & retail | 2001 |
| A2 Truck Service Ltd | Wholesale & retail | 2024 |
| A28 Car Wash Kent Ltd | Other services | 2026 |
| A28 Car Wash Ltd | Wholesale & retail | 2026 |
| AA N JJ Ltd | Administrative & support | 2024 |
| AA Service Station Ltd | Wholesale & retail | 2021 |
| AAH Canterbury Ltd | Hospitality | 2019 |
| AAJ Retail Trading Limited | Wholesale & retail | 2023 |
| Aalok Lighting Ltd | Manufacturing | 2018 |
| AAM Kent Ltd | Hospitality | 2025 |
| Aavantee UK Ltd. | Wholesale & retail | 2019 |
| AB Clinical Services Ltd | Health & social care | 2024 |
| AB Property & Construction Ltd | Construction | 2026 |
| Abap Developments Limited | Information & communication | 2009 |
| Abatso Limited | Construction | 2025 |
| Abbey AJI Limited | Construction | 2017 |
| Abbey Park (Faversham) Limited | Real estate | 2011 |
| Abbey Road Developments (Kent) Limited | Real estate | 1996 |
| Abbey Wharf Management Company Ltd | Households | 2022 |
| Abbott Bros.(Kent),Limited | Real estate | 1921 |
| Abbott Contractors Ltd | Construction | 2021 |
| Abbott Real Estates Ltd | Real estate | 2024 |
| Abbott Roberts (Wickhambreaux) Limited | Construction | 2018 |
| Abbott Roberts Properties Limited | Construction | 2015 |
| Abbott Sawyer Investments Ltd | Real estate | 2025 |
| Abcore Real Estate Limited | Real estate | 2024 |
| Abdalla Holdings Ltd | Real estate | 2020 |
| Abdo International Limited | Education | 2008 |
| Abdo Publications Limited | Information & communication | 1989 |
| Abdo Research Fund | Professional & scientific | 2013 |
| Abel Limited | Extraterritorial | 2006 |
| Abercrombie Court Management Limited | Real estate | 2011 |
| Abhn Plus Ltd | Information & communication | 2024 |
| Ability Asbestos Services Ltd | Construction | 2012 |
| Ability Group Capital Ltd | Real estate | 2024 |
| Ability Merchandising Ltd | Wholesale & retail | 2025 |
| Abithan Limited | Hospitality | 2017 |
| Abkatproperty Limited | Hospitality | 2022 |
| Ablaze Heating Solutions Ltd | Wholesale & retail | 2002 |
| ABM Grocery Ltd | Hospitality | 2021 |
| ABM Real Estate Ltd | Real estate | 2023 |
| Abode Sales and Lettings Limited | Real estate | 2012 |
| Absolute Ecoheating Solutions Ltd | Construction | 2026 |
| ABV Survey Limited | Professional & scientific | 2018 |
| Academy Engine Limited | Information & communication | 2025 |
| Academy for Distance Learning Limited | Education | 2010 |
| Academy of Positive Psychology Ltd | Professional & scientific | 2019 |
| Accelerate Business Networking Limited | Professional & scientific | 2015 |
| Accelerating Value LLP | | 2007 |
| Accelerating Value Member Limited | Professional & scientific | 2008 |
| Access First Digital Ltd | Information & communication | 2026 |
| Accidental Limited | Arts & recreation | 2000 |
| Accountable Hindustan Limited | Information & communication | 2024 |
| Accouter Holdings Limited | Financial services | 2024 |
| Accsense Ltd | Information & communication | 2024 |
| Accuheat Control Limited | Construction | 2018 |
| Accurretta Ltd | Wholesale & retail | 2022 |
| Ace Bakehouse Ltd. | Manufacturing | 2026 |
| Ace Knox Ltd | Wholesale & retail | 2022 |
| Ace Logical Limited | Professional & scientific | 2025 |
| Aced Qualifications Ltd | Education | 2022 |
| Aceglobal Care Solutions Ltd | Health & social care | 2023 |
| Acer Clarus Limited | Administrative & support | 2010 |
| ACH Farming Limited | Agriculture & fishing | 2020 |