| Greenstone Survey and Valuation Limited | Professional & scientific | 2016 |
| Greenview Nursery Limited | Education | 2014 |
| Greenwell Investments Limited | Real estate | 2012 |
| Griggs Developments Ltd | Real estate | 2026 |
| Grimston Freehold Collective Ltd | Households | 2023 |
| GRM Fire Doors Limited | Manufacturing | 2022 |
| Grovehurst Gate Management Company Limited | Households | 2026 |
| Grow and Scale Limited | Professional & scientific | 2022 |
| Grow in the Know Mentoring Ltd | Education | 2022 |
| GSR Roadmarking Ltd | Construction | 2022 |
| GT Building Specialists Ltd | Construction | 2021 |
| GTD Consultancy Limited | Construction | 2015 |
| Gurkha Chautari Limited | Hospitality | 2025 |
| Gurkha Resource Company Ltd | Administrative & support | 2019 |
| H & D Riverside Estates Limited | Real estate | 1998 |
| H 2 Ohms Plumbing and Electrical Specialists Limited | Construction | 2022 |
| H E Finch Ltd | Manufacturing | 2009 |
| H3 Folkestone Limited | Hospitality | 2015 |
| Hackneys Garden Ltd | Hospitality | 2020 |
| Hafod Management Co. Ltd | Households | 2000 |
| HAG Films Ltd | Information & communication | 2024 |
| Haighton Court (Folkestone) Limited | Households | 2006 |
| Hair & Beauty Co. Hawkinge Ltd | Other services | 2024 |
| Half Pint Ltd | Hospitality | 2023 |
| Hall Electrical and Renewables Limited | Construction | 2015 |
| Halo Headpieces Ltd | Manufacturing | 2024 |
| Halo Partners Limited | Professional & scientific | 2022 |
| Hamlet Chocolates UK Limited | Wholesale & retail | 2022 |
| Hand of Doom Productions CIC | Arts & recreation | 2017 |
| Handen Properties UK Limited | Real estate | 2014 |
| Handmaidens Soap Company Ltd | Manufacturing | 2025 |
| Handyspoon Ltd | Other services | 2011 |
| Hanley Property Company Limited | Real estate | 2020 |
| Hanlon's of Hamstreet Ltd | Professional & scientific | 2025 |
| Happy (K&K) Nails Ltd | Other services | 2026 |
| Happy Connections Ltd | Other services | 2022 |
| Happy Learner Academy Limited | Education | 2025 |
| Happy Skate Community Interest Company | Wholesale & retail | 2020 |
| Happy Star Takeaway Ltd | Hospitality | 2016 |
| Happy Transport Services Ltd. | Transport & logistics | 2021 |
| Harbour and Spire Ltd | Real estate | 2025 |
| Harbour Coffee Company Ltd | Hospitality | 2018 |
| Harbour Jewellery Projects CIC | Education | 2026 |
| Harbour Toon Ladies FC Ltd | Arts & recreation | 2026 |
| Harbourstone Pictures Limited | Information & communication | 2022 |
| Hards PR Limited | Professional & scientific | 1999 |
| Harlin Media Ltd | Manufacturing | 2021 |
| Harmer and SON Maintenance Ltd | Other services | 2020 |
| Harmony House Technology Ltd | Information & communication | 2024 |
| Harris & Phillips Consulting Limited | Financial services | 2017 |
| Harris Contractors Ltd | Construction | 2026 |
| Harrison & Sons (Folkestone) Limited | Construction | 2007 |
| Harry Allen Limited | Wholesale & retail | 2017 |
| Harte Joinery Ltd | Manufacturing | 2021 |
| Harvey Hall RTM Company Limited | Households | 2014 |
| Harvey Manor Management Ltd | Households | 2002 |
| Harvey Mansions Management Company Limited | Households | 2004 |
| Hassabar Property Group Ltd | Real estate | 2023 |
| Hatch Chicken Ltd | Hospitality | 2026 |
| Hatfield Lodge Care Home Limited | Health & social care | 2016 |
| Hatfield Lodge Holdings Limited | Other services | 2017 |
| Hatfield Productions Limited | Information & communication | 2022 |
| Haverfield Park Management Limited | Households | 2024 |
| Havery Developments UK Limited | Construction | 2005 |
| Havisham House Ltd | Real estate | 2026 |
| Hawkeye Land Limited | Information & communication | 2019 |
| Hawkinge Construction Ltd | Construction | 2025 |
| Hawley & Brookes Ltd | Professional & scientific | 2026 |
| Haydock Research Limited | Professional & scientific | 2024 |
| Haykay Flavor Hub Ltd | Wholesale & retail | 2025 |
| HBS Mart Ltd | Wholesale & retail | 2025 |
| HC Building (Kent) Ltd | Construction | 2022 |
| HD Property Partnership LLP | | 2021 |
| Hdshouses Ltd | Real estate | 2025 |
| HE Finch (Joinery Contracts) Ltd | Manufacturing | 2024 |
| Head Kandy Hair Studio Ltd | Other services | 2009 |
| Heal a Generation CIC | Education | 2025 |
| Healing Image Projects CIC | Education | 2023 |
| Health Light Care Limited | Health & social care | 2017 |
| Hearn & Fern Electrical Limited | Construction | 2025 |
| Heat Design Company Limited | Wholesale & retail | 2002 |
| Heathside Communications Ltd | Professional & scientific | 2021 |
| Heavy Weather Records Ltd | Information & communication | 2015 |
| Helix Planning Ltd | Professional & scientific | 2017 |
| Helixel Limited | Professional & scientific | 2014 |
| Hellocrossman Ltd | Professional & scientific | 2018 |
| Hellolove TV Limited | Professional & scientific | 2024 |
| Henning Limited | Information & communication | 2015 |
| Henwood Fifty Limited | Extraterritorial | 2025 |
| Herberts (Kent) Limited | Administrative & support | 2020 |
| Herbotanist Limited | Other services | 2023 |
| Hereland Ltd | Information & communication | 2026 |
| Heritage Brickwork & Paving Ltd | Construction | 2025 |
| Heritage Consultancy (London) Ltd | Professional & scientific | 2017 |
| Heritage Groundworks & Civils Ltd | Construction | 2026 |
| Heritage High Standard Roofing Ltd | Construction | 2025 |
| Heritage House PVT Ltd | Hospitality | 2025 |
| Hermes Advisory Ltd | Professional & scientific | 2025 |
| Hermes Digital Ltd | Professional & scientific | 2023 |
| Hermes Duchy Estates Ltd | Real estate | 2025 |