| Help OUR Wounded Royal Marines and Supporting Arms | Other services | 2012 |
| Helps for ALL CIC | Hospitality | 2019 |
| Hempstead House Restaurant Limited | Hospitality | 1998 |
| Henderson FM Ltd | Construction | 2018 |
| Hendly Limited | Construction | 2019 |
| Hendry Livery Services Limited | Agriculture & fishing | 2014 |
| Henlow Contractors Limited | | 1983 |
| Hennessy Capital Analysts Ltd | Professional & scientific | 2019 |
| Henry & George Ltd | Real estate | 2021 |
| Henry Cunningham Medical Ltd | Health & social care | 2023 |
| Herbert Payne (Farms) Limited | Agriculture & fishing | 1952 |
| Heritage Barber 1 Ltd | Other services | 2026 |
| HEY Good Cooking Ltd | Wholesale & retail | 2024 |
| HFH Productions Limited | Arts & recreation | 2023 |
| HI Jean Limited | Administrative & support | 2024 |
| High Achievers Tuition Services Limited | Education | 2020 |
| High Oaks Maintenance Ltd | Households | 2019 |
| High Street Garage Sittingbourne Ltd | Wholesale & retail | 2013 |
| High Summits Consulting Limited | Professional & scientific | 2017 |
| High Tide Retreats Ltd | Administrative & support | 2026 |
| Highsted Academy Trust | Education | 2010 |
| Highsted Consultancy Ltd | Administrative & support | 2021 |
| Highsted Consulting Ltd | Construction | 2021 |
| Highsted Property Management Ltd | Real estate | 2018 |
| Highway Designs Ltd | Professional & scientific | 2017 |
| Hikitia Surface Design and Venetian Plaster Limited | Construction | 2018 |
| Hill Billy Limited | Wholesale & retail | 1997 |
| Hill Electrical Services Contracting Limited | Construction | 2006 |
| Hillier Commercial Limited | Real estate | 2015 |
| Hillrun Limited | Real estate | 2010 |
| Hillwell Investments LLP | | 2007 |
| Hinde House Property RTM Company Limited | Households | 2017 |
| HIS Grace MAD Cuisine Ltd | Hospitality | 2020 |
| Historic Motor Musuem Mint Limited | Wholesale & retail | 2004 |
| HKP Mart Ltd | Wholesale & retail | 2023 |
| HM Project Management Specialist Limited | Professional & scientific | 2026 |
| HM Race Products Ltd | Manufacturing | 2020 |
| HMD Finance Ltd | Professional & scientific | 2023 |
| HMG Recruitment Ltd | Administrative & support | 2025 |
| HMS Software Solutions Ltd | Information & communication | 2022 |
| Hobbs Security Services Ltd | Administrative & support | 2024 |
| Holbee Limited | Information & communication | 2016 |
| Holding Ersin Ltd | Real estate | 2025 |
| Hole Street Farm Limited | Wholesale & retail | 2021 |
| Hollis Plumbing & Heating Ltd | Construction | 2023 |
| Home Choice Essentials Ltd | Wholesale & retail | 2026 |
| Home James Taxis Limited | Transport & logistics | 2019 |
| Home Shell Limited | Real estate | 2019 |
| Home-Start Sittingbourne and Sheppey | Health & social care | 2012 |
| Homenet Property Limited | Real estate | 2020 |
| Homepro Paving & Roofing Limited | Construction | 2025 |
| Homes 2 Suit Ltd | Real estate | 2019 |
| Homes on TAP Investments Limited | Real estate | 2021 |
| Homewell Limited | Households | 2021 |
| Honest to Dog Limited | Extraterritorial | 2018 |
| Honey BEE Designs Limited | Professional & scientific | 2007 |
| Honeycomb IT Solutions Limited | Information & communication | 2024 |
| Honeywell Property Investments Ltd | Real estate | 2016 |
| Honsize Healthcare Limited | Financial services | 2023 |
| Hope UK Healthcare Ltd | Health & social care | 2023 |
| Horizon Paediatric Care Ltd | Health & social care | 2024 |
| Hormozi & Sons Trading Ltd | Wholesale & retail | 2020 |
| Hormozi Investments Ltd | Real estate | 2025 |
| Horseshoe and Castle Limited | Hospitality | 2026 |
| Horticultural Direct Solutions Ltd | Administrative & support | 2018 |
| Hosea Property Services Ltd | Construction | 2023 |
| Hospitality Works Ltd | Hospitality | 2022 |
| Hot Corks Limited | Wholesale & retail | 2003 |
| Hot Frog PUB Company Limited | Extraterritorial | 2025 |
| Hot WOK 3TP Limited | Hospitality | 2023 |
| Houdini's Magic Bar (Canterbury) Limited | Hospitality | 2017 |
| Houdini's Magic Bar (Kent) Ltd | Hospitality | 2016 |
| Houlaah Ltd | Information & communication | 2022 |
| House of Jack Cakes Ltd | Wholesale & retail | 2023 |
| Housson Construction Ltd | Construction | 2021 |
| HOW2CAPITAL Ltd | Professional & scientific | 2025 |
| Hpss Holdings Ltd | Financial services | 2025 |
| HR Solve IT Limited | Professional & scientific | 2021 |
| HRC Property Services Ltd | Construction | 2026 |
| HRD Security Solutions Ltd | Manufacturing | 2011 |
| Hrisi 95 Limited | Wholesale & retail | 2008 |
| HRS Utilities Ltd | Construction | 2026 |
| HS & HK Medical Services Limited | Health & social care | 2023 |
| HS Wheels Ltd | Wholesale & retail | 2025 |
| HSU Construct Ltd | Construction | 2025 |
| HSU Estates Ltd | Real estate | 2020 |
| HSU Finance Ltd | Financial services | 2025 |
| HSU Group Ltd | Financial services | 2025 |
| HSU Management Ltd | Real estate | 2025 |
| Hubbard & Houghton Limited | Real estate | 1963 |
| Hudson, Berkley, Reinhart Limited | Information & communication | 1998 |
| Huggins Engineering Limited | Manufacturing | 2015 |
| Humanitas Solutions Ltd | Professional & scientific | 2019 |
| Humayra Kent Ltd | Hospitality | 2016 |
| Humphries Building Ltd | Construction | 2025 |
| Hunter Metal Holdings Limited | Professional & scientific | 2000 |
| Hunting Hub Group Ltd | Information & communication | 2025 |
| Hush Little Lullaby Ltd | Wholesale & retail | 2024 |
| HUX Holdings Limited | Professional & scientific | 2017 |
| HWC Express Ltd | Transport & logistics | 2020 |