| 1-8 Millers Court RTM Company Limited | Households | 2016 |
| 101 Tankerton Ltd | Hospitality | 2022 |
| 106/108 Middle Wall Limited | Real estate | 2009 |
| 11 to 30 Somerville Close Limited | Households | 2022 |
| 13 Medical Communications Ltd | Professional & scientific | 2018 |
| 137 Station Road RTM Company Limited | Real estate | 2018 |
| 14 Moorland Road Property Maintenance Limited | Administrative & support | 2013 |
| 14 ST Johns Road (Freehold) Limited | Households | 2017 |
| 15 Castle Road Management Co Limited | Households | 2025 |
| 158 Newcome Road Property Maintenance Limited | Administrative & support | 2013 |
| 16 Tankerton Road, Whitstable Limited | Households | 2010 |
| 16 Westmarsh Drive (Management Company) Limited | Households | 2002 |
| 2 Harold Road Management Company Limited | Households | 2009 |
| 210 Tankerton RD Management Co. Ltd | Households | 2021 |
| 24 Avenue Road (Herne Bay) Ltd | Administrative & support | 2022 |
| 24 Stade Street Management Company Limited | Households | 1994 |
| 28 Tankerton Road Whitstable Management Limited | Households | 2003 |
| 29 Sports Limited | Arts & recreation | 2020 |
| 2CARROTS Ltd | Hospitality | 2024 |
| 3 Core Electrical & Security Limited | Construction | 2007 |
| 3 Gladstone Road Whitstable Ltd | Households | 2019 |
| 33 Argyle Road Limited | Professional & scientific | 2008 |
| 36STUDIOUK Ltd | Wholesale & retail | 2026 |
| 38 Northwood Road (Whitstable) Limited | Households | 2020 |
| 39 Whitstable Limited | Hospitality | 2021 |
| 399 Canterbury Road Limited | Real estate | 2024 |
| 3HAINAULTAVENUE RTM Company Limited | Households | 2026 |
| 40, Colewood Road Management Limited | Households | 2011 |
| 41/47 Roundwood Road Limited | Households | 2006 |
| 43 Harbour News Ltd | Wholesale & retail | 2022 |
| 46 Cecile Park Limited | Households | 1991 |
| 5 Beach Walk (Management Company) Limited | Households | 2025 |
| 55 New Dover Road (Canterbury) Management Limited | Households | 2022 |
| 60 Chesterton Road Management Company Limited | Households | 2012 |
| 7C Shipping Limited | Professional & scientific | 2012 |
| 83 Bouverie Road West Management Limited | Real estate | 2008 |
| 93 Lawrence Road Property Maintenance Limited | Administrative & support | 2013 |
| A & S Metal Roof and Cladding Ltd | Construction | 2022 |
| A a S T Limited | Construction | 2008 |
| A D B Flooring Services Limited | Construction | 2009 |
| A Douglas Plumbing & Heating Ltd | Construction | 2025 |
| A E M Dismantling and Remediation Ltd | Water & waste | 2025 |
| A H Property Solutions Limited | Construction | 2024 |
| A M Clarke Ltd | Administrative & support | 2017 |
| A MAY Consultancy Services Limited | Administrative & support | 2023 |
| A O Kitchens Ltd | Construction | 2018 |
| A-Tech Studio Services Ltd | Information & communication | 2024 |
| A.Breck Electrical Ltd | Construction | 2019 |
| A.E.L.S. Skills Ltd | Education | 2019 |
| A.M Carousel Limited | Hospitality | 2024 |
| A.T. Consultancy Ltd | Real estate | 2005 |
| A.W Sheepwash Electrical Ltd | Construction | 2025 |
| AAK Socials Ltd | Professional & scientific | 2025 |
| Aardvark INK Limited | Professional & scientific | 2016 |
| Aaron Hall Limited | Extraterritorial | 2019 |
| Aast Properties Ltd | Real estate | 2023 |
| AB Hedervard Limited | Professional & scientific | 2025 |
| Abate (Kent) Limited | Construction | 2012 |
| Abbey Court Management (Tankerton) Limited | Real estate | 2004 |
| Abbey Gate Management (NO.2) Limited | Households | 1997 |
| Abbey Place (Minster Village Centre) Management Company Limited | Households | 2013 |
| ABD Property Maintenance Ltd | Construction | 2023 |
| ABI Cafe Ltd | Hospitality | 2018 |
| Ability Heating & GAS Ltd | Administrative & support | 2018 |
| About Trees Ltd | Agriculture & fishing | 2014 |
| Abtex Holdings Ltd | Real estate | 2025 |
| Accountants England Ltd | Professional & scientific | 2014 |
| Ace Accessories Limited | Manufacturing | 2024 |
| Acer Projects (S.E.) Limited | Construction | 2002 |
| Achieving Clarity Ltd | Professional & scientific | 2019 |
| Acorn Insurance Intermediaries Limited | Financial services | 1999 |
| Acsm Building Solutions Ltd | Construction | 2024 |
| ACT NOW for Business Ltd | Professional & scientific | 2020 |
| Adams Chestfield Consultancy Ltd | Information & communication | 2020 |
| Adbn Limited | Financial services | 2020 |
| Adderley Properties Limited | Real estate | 2024 |
| Adderley Technical Consulting Limited | Construction | 2023 |
| Adfa (Anthony Deer) Limited | Education | 2023 |
| Adhv Ltd | Manufacturing | 2014 |
| Adult Matters Ltd | Education | 2011 |
| AE Jones Homes Limited | Real estate | 2026 |
| Aestas Development I Limited | Construction | 2019 |
| Aestas Limited | Financial services | 2019 |
| Aesthetics by Tara and Laura Limited | Other services | 2022 |
| Aether Retail Group Ltd | Wholesale & retail | 2026 |
| Afloat Ltd | Manufacturing | 2024 |
| African Consultants Limited | Financial services | 2015 |
| Aghi Ltd | Administrative & support | 2023 |
| Agile and Lean Limited | Information & communication | 2014 |
| AGP Williams Ltd | Construction | 2017 |
| AH Construction (Kent) Limited | Construction | 2018 |
| Ahep Ltd | Professional & scientific | 2020 |
| Aileen Management Limited | Real estate | 2005 |
| AIM Fire Services Limited | Professional & scientific | 2004 |
| Aimis Solutions Ltd | Professional & scientific | 2016 |
| Aitana Properties Ltd | Real estate | 2018 |
| AJA Consultants Ltd | Real estate | 2020 |
| Ajax Warren PPS Limited | Administrative & support | 2024 |
| AJJ Electrical Ltd | Construction | 2019 |
| AK Barbers Whitsable Ltd | Other services | 2025 |