| Grange Farms (Upper Halliford) Limited | Other services | 1941 |
| Grazing Squad Ltd | Hospitality | 2024 |
| Green Hawk Limited | Administrative & support | 2019 |
| Greenlight Fibre Trading Limited | Wholesale & retail | 2014 |
| Groundhouse Media and Leisure Ltd | Manufacturing | 2020 |
| Gulliver Taverns Ltd | Professional & scientific | 2013 |
| GWL Holdings Ltd | Financial services | 2022 |
| Gym Masterz Ltd | Arts & recreation | 2026 |
| H and D Scaffolding Ltd | Construction | 2018 |
| H&R Domiciliary Care Limited | Health & social care | 2022 |
| H4YVN Ltd | Hospitality | 2026 |
| Habitus Construction Ltd | Construction | 2021 |
| Hagens Bees Limited | Wholesale & retail | 2024 |
| Hair Studio Limited | Administrative & support | 2014 |
| Halfway Barber Ltd | Other services | 2024 |
| Halfway Conservative Investments Ltd. | Arts & recreation | 1937 |
| Halfway Fish Bar Ltd | Hospitality | 2025 |
| Handy Prints Branding Solutions Limited | Manufacturing | 2018 |
| Hann's on Plumbing & Bathrooms Ltd | Construction | 2022 |
| Harken Media Influencer Management Ltd | Professional & scientific | 2025 |
| Harmonic Forge Limited | Wholesale & retail | 2025 |
| Harps Inn Ltd | Hospitality | 2013 |
| Harrington Scott Limited | Professional & scientific | 2005 |
| Harrispestcontrol Ltd | Administrative & support | 2022 |
| Harvey Inc Ltd | Transport & logistics | 2020 |
| Harveys Contracting Group Ltd | Construction | 2001 |
| Haus+Home Cleaning Group Ltd | Financial services | 2014 |
| Havanna Limited | Administrative & support | 2016 |
| Havanna Property Solutions Limited | Real estate | 2024 |
| Havetsky Limited | Health & social care | 2026 |
| HAZ Barbers Sheerness Ltd | Other services | 2025 |
| Hazeldene Sheppey Management Company Limited | Real estate | 1988 |
| HB Beauty (Kent) Ltd | Other services | 2025 |
| Hearthstone Energy Limited | Professional & scientific | 2026 |
| Heatlec Installations Limited | Construction | 1986 |
| Heddon Properties Ltd | Real estate | 2024 |
| Heliozen Solar Ltd | Construction | 2025 |
| Heritel Holdings Limited | Financial services | 2026 |
| Heritel Property Ltd | Real estate | 2023 |
| Hhsl Ltd | Construction | 2026 |
| Hiab Transport Services Limited | Transport & logistics | 2016 |
| Hill Corner Farm Park Limited | Hospitality | 2016 |
| Hill Top Residential Park Limited | Hospitality | 2020 |
| Hilltop Caravan Park Ltd | Real estate | 2023 |
| Hilltop Holiday Services Limited | Manufacturing | 2021 |
| Hitting Heights Scaffolding Ltd | Construction | 2018 |
| Hive Homes Management Ltd | Real estate | 2023 |
| HLB Holdings Limited | Administrative & support | 2023 |
| Holbrook Griffith Development Ltd | Construction | 2016 |
| Holmwood International Shipping Limited | Transport & logistics | 2005 |
| Homes by Yates Limited | Real estate | 2025 |
| Homing Club House Ltd | Wholesale & retail | 2015 |
| Honey Hill Developments Ltd | Real estate | 2014 |
| Honey Hill Housing Limited | Construction | 2016 |
| Honey Hill Lettings Ltd | Real estate | 2021 |
| Honeybeach Developments Ltd | Construction | 2019 |
| Honeysuckle Drive Management Ltd | Households | 2024 |
| Horton House's Ltd | Real estate | 2020 |
| Horton Property Consultancy Ltd | Construction | 2017 |
| House Estate Agents Ltd | Real estate | 2018 |
| Hr-Support Solutions Ltd. | Administrative & support | 2014 |
| Hughes Homes Lettings Ltd | Real estate | 2024 |
| Human Herd & Harmony CIC | Education | 2026 |
| Hundal Kebab House Ltd | Hospitality | 2021 |
| Hunt Design Limited | Construction | 2005 |
| HUNT3R & Co Ltd | Wholesale & retail | 2025 |
| Hunters Investments Ltd | Real estate | 2025 |
| Hunters Park Homes Limited | Transport & logistics | 2026 |
| Hurst Management (Sheppey) Limited | Households | 2024 |
| HUSO68 Ltd | Hospitality | 2025 |
| Hutchinson's Construction Ltd | Construction | 2021 |
| Hyperfixation Station Ltd | Wholesale & retail | 2024 |
| I-Umbrella Ltd | Information & communication | 2017 |
| IBP Direct Ltd | Wholesale & retail | 2015 |
| Icabins Swale Ltd | Hospitality | 2023 |
| Icars (Swale) Ltd | Transport & logistics | 2016 |
| Icon Catering Ltd | Hospitality | 2023 |
| Icy.Co Ltd | Wholesale & retail | 2025 |
| Ideal Conservatories and Windows Limited | Construction | 2003 |
| IHA Consulting Services Ltd | Administrative & support | 2019 |
| IJD Refurbishments and Property Maintenance Limited | Construction | 2016 |
| Ily-A (SE) Limited | Wholesale & retail | 2021 |
| IMO Construction Limited | Construction | 2015 |
| Imperial Jewellers Ltd | Wholesale & retail | 2025 |
| Imperla Graphics Limited | Information & communication | 2012 |
| IN5 Park Tavern Ltd | Construction | 2023 |
| Indeco Flowers Limited | Arts & recreation | 2015 |
| Industrial Solutions Limited | Extraterritorial | 2020 |
| Inner Compass Therapeutic Services Ltd | Health & social care | 2022 |
| Inner Journey LLP | | 2025 |
| Insightful Times Limited | Professional & scientific | 2026 |
| Installation Services 25 Ltd | Construction | 2025 |
| Intelligentia Properties Ltd | Real estate | 2019 |
| Intelligentia Technologies Ltd | Administrative & support | 2018 |
| International Holiday Homes Limited | Transport & logistics | 2019 |
| International Lifts & Elevators Ltd | Construction | 2009 |
| Interstellar Drones Ltd | Other services | 2016 |
| Invicta Building Limited | Construction | 2018 |
| Invicta Construction Estimating Co Ltd | Professional & scientific | 2025 |
| Invicta Roofline Ltd | Construction | 2026 |