| Holmes Trading Group Ltd | Information & communication | 2023 |
| HOLMES4INVESTMENTS Ltd | Real estate | 2023 |
| Holy Trinity Monastery | Other services | 2011 |
| Homebound Relocations Limited | Hospitality | 2022 |
| Homefix Property Services Ltd | Real estate | 2014 |
| Homepropertybuyers Ltd | Information & communication | 2004 |
| Hometown Buddy Ltd | Administrative & support | 2011 |
| Honeysuckle Inn Ltd | Hospitality | 2021 |
| Honeysuckle Road Ltd | Households | 2015 |
| Hoobynoo World Limited | Manufacturing | 2013 |
| Hope Psychology and Coaching Services Ltd | Health & social care | 2023 |
| Hoppy Hideaway Ltd | Hospitality | 2026 |
| Horton Strategic Limited | Professional & scientific | 2013 |
| Horwood Property Lets Ltd | Real estate | 2023 |
| Hotcraze Ltd | Wholesale & retail | 2008 |
| Houghton Kneale Design Limited | Professional & scientific | 2000 |
| House Bounce Ltd | Real estate | 2020 |
| House of MID Limited | Wholesale & retail | 2025 |
| Howard Chodha Ltd | Information & communication | 2020 |
| Howard Events (Kent) Ltd | Wholesale & retail | 2021 |
| Hoyle & Hughes Ltd | Construction | 2017 |
| Hoyle and Hughes Homes Limited | Construction | 2021 |
| Hoyle's Homes Ltd | Real estate | 2022 |
| Hoyles Build Ltd | Construction | 2016 |
| Hppa Limited | Manufacturing | 2010 |
| HSR Rentals Ltd | Real estate | 2021 |
| HT Haulage (Kent) Ltd | Transport & logistics | 2018 |
| HTW Limited | Manufacturing | 2005 |
| Hugin Vikings Community Interest Company | Arts & recreation | 2024 |
| Humanpay Community Interest Company | Information & communication | 2026 |
| HWB Healthtech Limited | Information & communication | 2026 |
| Hyde Construction Services Limited | Construction | 2017 |
| Hydrogen TE (Manston) Ltd | Manufacturing | 2023 |
| Hydrogen TE Kent Ltd | Manufacturing | 2024 |
| I AM Beyoutiful Ltd | Education | 2021 |
| I&P Romanian Food Ltd | Wholesale & retail | 2024 |
| I-Tan Westgate Ltd | Other services | 2015 |
| I.B.O. Services Limited | Wholesale & retail | 2003 |
| IAN Powell Creative Ltd | Information & communication | 2012 |
| IB Therapy Limited | Health & social care | 2024 |
| Iconative Ltd | Professional & scientific | 2019 |
| Idyllic Ponds & Landscaping Ltd | Administrative & support | 2018 |
| Ifix Green Solutions Ltd | Construction | 2025 |
| IL Tricolore (Ramsgate) Limited | Hospitality | 2021 |
| Image Research Limited | Information & communication | 2009 |
| Imba Holdings Ltd | Financial services | 2023 |
| IMC Risk Management Limited | Professional & scientific | 2020 |
| Immajine Ltd | Professional & scientific | 2023 |
| Impact Trade Solutions Limited | Construction | 2022 |
| Imperium Healthcare (Tech) Limited | Information & communication | 2024 |
| Imperium Healthcare Limited | Administrative & support | 2019 |
| Impulsebuy Uk-Sl Limited | Wholesale & retail | 2025 |
| IN Real Life Games Ltd | Wholesale & retail | 2023 |
| Incarnadine Imprint Ltd | Information & communication | 2025 |
| Indralokam Ltd | Information & communication | 2025 |
| Industrial Transfer and Development Corporation Limited | Administrative & support | 1947 |
| Ineffable Homes Ltd | Real estate | 2021 |
| Infection Chambers Limited | Health & social care | 2020 |
| Infection Medical Holdings Limited | Financial services | 2020 |
| Innovation Pest Control Limited | Administrative & support | 2023 |
| Insieme Holding Limited | Financial services | 2025 |
| Inspire Flight Services Ltd | Transport & logistics | 2021 |
| Instant Printing Ltd | Manufacturing | 2015 |
| Integritas Management Limited | Professional & scientific | 2020 |
| INTEGRITY24 Care Ltd | Health & social care | 2023 |
| International Association of Tour Managers Limited | Other services | 1976 |
| International Claims Agency Limited | Financial services | 1976 |
| International Corporate Partner Resource 1200 Limited | Professional & scientific | 2009 |
| Interteks SD Limited | Wholesale & retail | 2019 |
| Intl Education CIC | Education | 2023 |
| Invicta Investigation Ltd | Administrative & support | 2009 |
| Invicta Linux Limited | Information & communication | 2001 |
| Invicta Rope Access Ltd | Administrative & support | 2020 |
| Irresistable Force Limited | Arts & recreation | 2013 |
| Isecure (UK) Limited | Administrative & support | 2012 |
| Isle Quality Painting and Decorating Limited | Administrative & support | 2015 |
| Istanbul Grill Ramsgate Ltd | Hospitality | 2015 |
| Isted Transport & Courier Services Limited | Transport & logistics | 2026 |
| Isus Manufacturing & Installations Limited | Administrative & support | 2010 |
| IT IS AS Limited | Wholesale & retail | 2023 |
| It's Your Choice Activities Service C.I.C. | Health & social care | 2025 |
| Itech Mobiles and Repair Centre Ltd | Wholesale & retail | 2026 |
| IV & KO Ltd | Manufacturing | 2021 |
| IX BAG TAG Ltd | Manufacturing | 2025 |
| J & C Installations Limited | Construction | 2019 |
| J & H Catering Services Ltd | Hospitality | 2022 |
| J & K Heard Limited | Professional & scientific | 2009 |
| J a Whybrow Electrical & Security Ltd. | Extraterritorial | 2019 |
| J and R Bathrooms Ltd | Construction | 2024 |
| J E H Security Services Limited | Administrative & support | 2004 |
| J Jennings Limited | Professional & scientific | 2002 |
| J M a Trade Co. Ltd | Wholesale & retail | 2025 |
| J Macey Electrical Limited | Construction | 2018 |
| J S Williams Fire Safety Consulting Limited | Other services | 2018 |
| J&C Assets Ltd | Real estate | 2025 |
| J&C Developments (Kent) Limited | Construction | 2021 |
| J&L Holdings (Kent) Limited | Financial services | 2017 |
| J&L Union Ltd | Hospitality | 2025 |
| J.C.Farley Limited | Wholesale & retail | 1957 |
| J.D. Brydson Aviation Engineering Limited | Transport & logistics | 2016 |