| HCM International Ltd | Administrative & support | 2022 |
| He's Alive Chapel C.I.C. | Other services | 2017 |
| Headcorn Natural Centre Ltd | Real estate | 2000 |
| Headonism Hair Consultants and Stylists LLP | | 2005 |
| Heal&Glow Limited | Health & social care | 2025 |
| Health Action | Health & social care | 2003 |
| Healthstrong Solutions Limited | Health & social care | 2017 |
| Heart Campaign | Education | 2007 |
| Heat and Homes Limited | Construction | 2020 |
| Heatfast Ltd | Construction | 2023 |
| Heathfield House Freehold Company Limited | Households | 1998 |
| Heathward Investments Ltd | Real estate | 2024 |
| Hebar Limited | Wholesale & retail | 2013 |
| Hebe GB Gardening and Building Ltd | Construction | 2025 |
| Hectic Lifestyles Limited | Manufacturing | 2008 |
| Hector & Bert Limited | Information & communication | 2024 |
| Hedgehogs Early Years Ltd | Education | 2016 |
| Hegarty Commercials Ltd | Other services | 2004 |
| Hehku Limited | Construction | 2014 |
| Heights Property Development Ltd | Construction | 2020 |
| Helders Roofing Limited | Construction | 2014 |
| Helm Construction Management Limited | Construction | 2010 |
| Heloai Ltd | Professional & scientific | 2026 |
| Help at Home (Medway) Limited | Health & social care | 2018 |
| Help Point Limited | Manufacturing | 1999 |
| Help With Limited | Wholesale & retail | 2019 |
| Hempstead Systems Limited | Information & communication | 2006 |
| Hemsworth Services Limited | Construction | 2025 |
| Henarc Services Limited | Construction | 2025 |
| Henderson Financial Ltd | Professional & scientific | 2016 |
| Hendex Construction Ltd | Construction | 2019 |
| Henetech Ltd | Professional & scientific | 2022 |
| Henry Grace Logistics Ltd | Transport & logistics | 2023 |
| Henson Electrical Services Limited | Construction | 2016 |
| HER Place Gym Group Ltd | Arts & recreation | 2025 |
| Hera CLP Consultancy Ltd | Professional & scientific | 2021 |
| Hera Floral Trading Ltd | Wholesale & retail | 2024 |
| Herbert & Ward Limited | Manufacturing | 1929 |
| Heritage Estate & Home Limited | Construction | 2005 |
| Heritage Glazing Ltd. | Construction | 2017 |
| Heroapps Global Limited | Information & communication | 2024 |
| HEW Property Ltd | Real estate | 2026 |
| Hewi (UK) Limited | Manufacturing | 2007 |
| HEX Investments Limited | Financial services | 2019 |
| HFH Property Ltd | Real estate | 2025 |
| HFL Flooring Solutions Ltd | Wholesale & retail | 2021 |
| HFS Roofing Services Ltd | Construction | 2025 |
| HG Autos Ltd | Wholesale & retail | 2019 |
| Hi-Heat Ltd | Other services | 2023 |
| Hicks Consultancy Limited | Financial services | 2026 |
| Hidea Ltd | Information & communication | 2024 |
| Higgins Lettings Limited | Real estate | 2011 |
| High Street Brands Ltd | Wholesale & retail | 2025 |
| High Tempo Ltd | Administrative & support | 2020 |
| Higham Garage Ltd | Wholesale & retail | 2010 |
| Higham Village Pre-School Ltd | Education | 2023 |
| Highcrest Incorporated Ltd | Administrative & support | 2025 |
| Highfield Foods Ltd | Wholesale & retail | 2016 |
| Highintegrity.Ai Ltd | Information & communication | 2024 |
| Highly Favoured Limited | Health & social care | 2013 |
| Highway Contractor Services Limited | Construction | 2019 |
| Hilights Holdings Limited | Other services | 2015 |
| Hilights Plant Hire Company Limited | Administrative & support | 2020 |
| Hilights Southern Ltd | Construction | 2012 |
| Hillo Healthcare Services Limited | Professional & scientific | 2002 |
| Hills Plumbing Services Ltd | Construction | 2016 |
| Hipoint LV Ltd | Transport & logistics | 2025 |
| Hire 2 YOU Limited | Administrative & support | 2013 |
| HIRE2YOU Franchise Limited | Administrative & support | 2020 |
| Hiscock Corporation Limited | Financial services | 2023 |
| History Research Environment Limited | Information & communication | 2016 |
| Hive of Cliffe Ltd | Hospitality | 2025 |
| Hixx Limited | Manufacturing | 2015 |
| HJB Plant & Operatives Ltd | Construction | 2022 |
| HJH Caney Ltd | Construction | 2019 |
| HK Investments Kent Ltd | Real estate | 2023 |
| HK7 Healthcare Services Limited | Health & social care | 2021 |
| HM Finance Limited | Real estate | 2006 |
| HM Kent Properties Ltd | Real estate | 2024 |
| HM Studios Limited | Wholesale & retail | 2020 |
| HM Taylor & Sons Properties Ltd | Real estate | 2026 |
| HMH Consulting Ltd | Other services | 2020 |
| Hobart Acrylics Limited | Manufacturing | 1997 |
| Hobarts Laser Supplies Limited | Manufacturing | 2003 |
| Hobo Films Limited | Arts & recreation | 2008 |
| Hocking Design Ltd. | Professional & scientific | 2016 |
| Hockley Fencing Supplies Ltd | Wholesale & retail | 2023 |
| Hodja Holdings Limited | Professional & scientific | 2017 |
| Hodja Trst Property Limited | Real estate | 2025 |
| Hodsall Limited | Administrative & support | 2020 |
| Hoedus Limited | Professional & scientific | 2010 |
| Hogan Marketing Communications Ltd | Professional & scientific | 2012 |
| Hogarth Inn (Grain) Ltd | Hospitality | 2023 |
| Hogarth Property Co Ltd | Construction | 2023 |
| Holamys Limited | Transport & logistics | 2023 |
| Holborough Shoot & Sporting GUN Club Ltd | Agriculture & fishing | 2025 |
| Holborough Shoot LLP | | 2014 |
| Holbourn Properties Limited | Real estate | 2015 |
| Holcombe Health Clinic Ltd | Health & social care | 2019 |
| Holcombe Talent Academy C.I.C. | Education | 2022 |