| Hermes Group Holdings Ltd | Financial services | 2025 |
| Herridge Health Information Solutions Ltd | Information & communication | 2018 |
| Hestia Concepts Limited | Professional & scientific | 2016 |
| Hestia Property Services Ltd | Real estate | 2007 |
| HH2010 Ltd | Transport & logistics | 2024 |
| Hiab Hire UK Ltd | Administrative & support | 2025 |
| Hide Physiotherapy Limited | Other services | 2011 |
| Highcliffe Court RTM Co Limited | Households | 2010 |
| Highly Healthy Habits Limited | Health & social care | 2026 |
| Hightecpl Limited | Manufacturing | 2007 |
| Highview Park Ltd | Real estate | 2025 |
| Highway Traffic Services Ltd | Professional & scientific | 2017 |
| Hills Rail Services Ltd | Other services | 2018 |
| Himalayan Limited | Wholesale & retail | 2008 |
| Himalayan Takeaway & Cafe Limited | Hospitality | 2018 |
| Himalayan Takeaway and Cafe (Sandgate) Limited | Hospitality | 2024 |
| Hinxhill Fields Ltd | Agriculture & fishing | 2025 |
| Hit'N'Mix Limited | Information & communication | 2009 |
| HJ Landscapes & Groundworks Ltd | Construction | 2024 |
| HJS Homes Ltd | Construction | 2010 |
| HKG Futures Ltd | Information & communication | 2026 |
| HLR Services Limited | Transport & logistics | 2015 |
| Hmcts Kent Surrey and Sussex Enforcement Business Centre Limited | Arts & recreation | 2022 |
| HMI International Limited | Information & communication | 2016 |
| Holborough Interiors Limited | Construction | 2021 |
| Holdstance Property Management Limited | Households | 1994 |
| Holdtop Property Management Limited | Real estate | 1989 |
| Holiday Travel Genius Ltd | Hospitality | 2020 |
| Hollis 2 Limited | Professional & scientific | 2003 |
| Holmes Lettings (Kent) Limited | Real estate | 2022 |
| Holocene Ltd | Information & communication | 2015 |
| Home Myaib Ltd | Manufacturing | 2026 |
| Home Safe Installations Limited | Construction | 2012 |
| Home-Start Shepway | Health & social care | 2004 |
| Homemaker Bedding Ltd | Wholesale & retail | 2008 |
| Homephase Property Management Limited | Households | 1993 |
| Homeplus Furniture Collection Limited | Wholesale & retail | 2025 |
| Homeplus Furniture Limited | Administrative & support | 2009 |
| Honeypot Farm Limited | Real estate | 2025 |
| Hood and Hall Limited | Professional & scientific | 2014 |
| Hook Green Court Management Limited | Households | 2000 |
| Hooptii Ltd | Hospitality | 2026 |
| Hope Farm Limited | Agriculture & fishing | 2011 |
| Hopes Properties Ltd | Real estate | 2022 |
| Horizon Seabrook Limited | Households | 2009 |
| Horsa Capital Limited | Administrative & support | 2020 |
| Horus Security Ltd | Administrative & support | 2025 |
| Hotel Beverages Ltd | Wholesale & retail | 2011 |
| Hound Hirings Limited | Extraterritorial | 2021 |
| House of Cards Folkestone Ltd | Wholesale & retail | 2024 |
| House of Hustle Global Limited | Professional & scientific | 2021 |
| House of Shepherd Ltd | Real estate | 2024 |
| Hovercraft Coffee Ltd | Wholesale & retail | 2026 |
| Howard's Paving & Surfacing Specialists Ltd | Construction | 2022 |
| Hubble Air Conditioning Limited | Professional & scientific | 2019 |
| Hubble Property Services Limited | Real estate | 2019 |
| Hubl Limited | Manufacturing | 2025 |
| Hudson Renshaw Limited | Information & communication | 2026 |
| HUG Hampers Ltd | Wholesale & retail | 2025 |
| Hugh Champneys Ltd | Real estate | 2024 |
| Hughes Window Cleaning Services Ltd | Administrative & support | 2026 |
| Humans United Ltd | Professional & scientific | 2024 |
| Huntsfield Limited | Real estate | 2007 |
| Hurley Management Company Limited | Professional & scientific | 2016 |
| Hydrofix Mechanical Ltd | Construction | 2026 |
| Hydromarc Ltd | Manufacturing | 2012 |
| Hythe Antiques & Interiors Ltd | Wholesale & retail | 2016 |
| Hythe Brickwork Limited | Other services | 2017 |
| Hythe Kent Taxis Ltd | Transport & logistics | 2024 |
| Hythe Osteopathic Clinic Limited | Health & social care | 2014 |
| I AM Charlie Ltd | Information & communication | 2022 |
| I Hart Property Limited | Real estate | 2026 |
| I J Walsh Limited | Wholesale & retail | 2002 |
| I-Swiss Limited | Administrative & support | 2009 |
| I.D.R. System Limited | Construction | 2010 |
| IAN Grech Ltd | Information & communication | 2011 |
| IAN Plato Ltd | Wholesale & retail | 2022 |
| IBOS89 Ltd | Hospitality | 2021 |
| Ice FM Limited | Extraterritorial | 2025 |
| Iced Gemms Ltd | Manufacturing | 2020 |
| Iconn Ltd | Real estate | 2008 |
| ID Hair Design Ltd | Other services | 2014 |
| Identex Limited | Extraterritorial | 2026 |
| Idle Hands Furniture Ltd | Manufacturing | 2024 |
| IEW Property Partners Limited | Households | 2023 |
| Ifpm-Tecser Limited | Professional & scientific | 2006 |
| Ifuncky Ltd | Arts & recreation | 2013 |
| Ignite Stoves and Chimneys Limited | Administrative & support | 2025 |
| Igol Management Limited | Real estate | 2018 |
| Igor Emmerich Limited | Professional & scientific | 2011 |
| IHY International Limited | Information & communication | 2016 |
| IHZ International Limited | Information & communication | 2016 |
| IIS Holdings Limited | Financial services | 2018 |
| IIS South East Limited | Financial services | 2018 |
| IJE International Limited | Information & communication | 2017 |
| Ikon Business Solutions Limited | Professional & scientific | 2021 |
| Ikon Payrolls Limited | Professional & scientific | 2021 |
| IKZ International Limited | Information & communication | 2016 |
| Ilex Motors Limited | Wholesale & retail | 2019 |
| Imba Homes Ltd | Construction | 2024 |