| Inspired Beauty (Kent) Limited | Other services | 2024 |
| Integrity Training Services Ltd | Education | 2025 |
| International Aviation Leasing Consultants Ltd | Administrative & support | 2020 |
| International Consignments Limited | Transport & logistics | 2014 |
| International Science Consultants Limited | Professional & scientific | 2024 |
| Invacom Holdings Limited | Professional & scientific | 2001 |
| Invacom Limited | Professional & scientific | 2000 |
| Invacom Systems Limited | Professional & scientific | 2001 |
| Invent Architecture Limited | Professional & scientific | 2015 |
| Invent Holdings Limited | Financial services | 2017 |
| Investmarket Limited | Real estate | 1994 |
| Invextrade Pharma Ltd | Health & social care | 2016 |
| Invicta (Property) Limited | Real estate | 2012 |
| Invicta Aircraft Engineering Limited | Transport & logistics | 2006 |
| Invicta Aviation Limited | Transport & logistics | 1998 |
| Invicta Business Development Ltd | Professional & scientific | 2022 |
| Invicta Financial Resources Ltd | Administrative & support | 2026 |
| Invicta Group Services Ltd | Wholesale & retail | 2020 |
| Invicta Home Improvements Limited | Construction | 2015 |
| Invicta Promotions Limited | Wholesale & retail | 2008 |
| Invicta Testing Services Limited | Construction | 2012 |
| IPF Electrical Services Ltd | Construction | 2023 |
| IPS Graphics Limited | Manufacturing | 2000 |
| Irish Village Residents Ltd | Extraterritorial | 2012 |
| Iseran Estates Ltd | Real estate | 2021 |
| Island Wall Developments Ltd | Hospitality | 2021 |
| IT 490 Limited | Information & communication | 2007 |
| Itenuk Ltd | Information & communication | 2016 |
| Ivory Foods Limited | Hospitality | 2026 |
| IVY House (Maisonettes) Limited | Households | 1970 |
| Iwihtot Ltd | Information & communication | 2021 |
| J a Richardson Restoration Solutions Limited | Wholesale & retail | 2025 |
| J H Kirkness & Sons Ltd | Administrative & support | 2022 |
| J H Property Services South East Limited | Administrative & support | 2010 |
| J J Solar Servicing (UK) Limited | Other services | 2020 |
| J Paterson the Window Company Ltd | Construction | 2019 |
| J Redmond Carpentry & Construction Ltd | Construction | 2022 |
| J&M Miller Limited | Information & communication | 2020 |
| J&O Sittingbourne SPV Ltd | Real estate | 2026 |
| J&R Real Investments Ltd | Real estate | 2023 |
| J-Coe Tech Solutions Ltd | Information & communication | 2025 |
| J.A.P Consultancy Ltd | Administrative & support | 2023 |
| Jaguar Specialist (Kent) Limited | Wholesale & retail | 2017 |
| James D Construction Ltd | Construction | 2013 |
| James Fitness (Kent) Ltd | Health & social care | 2017 |
| Janbek & Frauscher Limited | Manufacturing | 2003 |
| Jane at Graham Greener Ltd | Wholesale & retail | 2024 |
| Janes Affliction Limited | Other services | 2025 |
| Jbech Ltd | Manufacturing | 2002 |
| JBM Electrical Wholesale Ltd | Wholesale & retail | 2015 |
| JC Business Support Ltd | Professional & scientific | 2004 |
| JE Project & Contracts Group Ltd | Professional & scientific | 2025 |
| Jelly Beanz Limited | Other services | 2005 |
| JEN Bishop Consulting Ltd | Administrative & support | 2020 |
| Jenkins Canine Services Ltd | Other services | 2021 |
| Jenna KAY Laser Treatments Limited | Other services | 2025 |
| Jenna Russell Limited | Arts & recreation | 2016 |
| Jerip Ltd | Professional & scientific | 2016 |
| JET Engineering Services Ltd. | Manufacturing | 2012 |
| Jeweller Direct Ltd | Arts & recreation | 2011 |
| JIM Wyllie Limited | Professional & scientific | 2020 |
| Jim's of Whitstable Limited | Manufacturing | 2012 |
| JJ Properties SE Ltd | Real estate | 2023 |
| JJ Solar Holdings (UK) Limited | Financial services | 2024 |
| JLM Polishing Ltd | Administrative & support | 2017 |
| JM Beverages Ltd | Wholesale & retail | 2021 |
| JMG Wholesale Limited | Wholesale & retail | 2022 |
| JMP Driveways Ltd | Administrative & support | 2024 |
| JNJ Services Ltd | Professional & scientific | 2019 |
| Joan Floyd Properties Limited | Real estate | 2013 |
| Joanne Nash Design Limited | Construction | 2007 |
| Jodi Adams Associates Limited | Administrative & support | 2013 |
| Johga Limited | Real estate | 2019 |
| John Harvey Driving School Franchise Ltd | Education | 2023 |
| John Harvey Driving School Ltd | Education | 2022 |
| John Hellyar and Company Limited | Manufacturing | 1961 |
| John Taylor & Green Limited | Construction | 1972 |
| John Wilson Business Park Management Company Limited | Real estate | 1989 |
| Joint Pain Supports Ltd | Administrative & support | 2024 |
| Jojos (Whitstable) Limited | Manufacturing | 2009 |
| Jolly Good Experiences CIC | Professional & scientific | 2024 |
| Jonathan Austin Ltd | Professional & scientific | 2025 |
| Jonathan Beal Ltd | Professional & scientific | 2017 |
| Jonathan Weekes Ltd | Arts & recreation | 2018 |
| Jones Street Studios (2010) Limited | Real estate | 1991 |
| Jones Street Studios Limited | Real estate | 2009 |
| Joseph Prochnik Property Limited | Real estate | 2018 |
| Joseph Wilson Estate Management Company Limited(The) | Households | 1984 |
| Joseph Wilson Industrial Estate Extension 2022 Limited | Real estate | 2022 |
| Josh Parks Limited | Education | 2016 |
| Josh Wilson Properties Holdings LLP | | 2025 |
| Josh Wilson Properties Limited | Financial services | 2021 |
| Joy Inc Ltd | Professional & scientific | 2016 |
| Joy Lane Clinic Limited | Health & social care | 2016 |
| Joyce Workforce Consulting Limited | Professional & scientific | 2025 |
| Jpkj Services Ltd | Administrative & support | 2012 |
| JPLONDON21 Ltd | Financial services | 2019 |
| JPN Civil Engineering Ltd | Professional & scientific | 2018 |
| Jpwm Media Ltd | Administrative & support | 2021 |
| JT Building Services U.K Ltd | Construction | 2025 |