| Harris Connect Ltd | Information & communication | 2025 |
| Harrogate Analytics Limited | Extraterritorial | 2025 |
| Hart Hill House Management Company Limited | Households | 1976 |
| Hart Homes Limited | Construction | 2004 |
| Harton Consultancy Limited | Professional & scientific | 2019 |
| Harvey Balsdon Ltd | Information & communication | 2025 |
| Harvey Fabrication Limited | Wholesale & retail | 1979 |
| Harward Investments Ltd | Real estate | 2019 |
| Haskins Logistics Solutions Ltd | Professional & scientific | 2022 |
| Hass Jatt Limited | Wholesale & retail | 2023 |
| Hasss Ltd | Wholesale & retail | 2026 |
| Hatcha Limited | Information & communication | 2022 |
| Hatched Social Limited | Professional & scientific | 2015 |
| Haulio Ltd | Transport & logistics | 2026 |
| Haus.Ort Ltd | Hospitality | 2025 |
| Havales Ltd | Other services | 2019 |
| Haven Residents Association Limited(The) | Households | 1983 |
| Havenlake Ltd | Professional & scientific | 2015 |
| Havenspace Limited | Real estate | 2024 |
| Haverhill Estates Limited | Real estate | 2008 |
| Haverhill SS Limited | Real estate | 2022 |
| Hawk Pharma Consulting Ltd | Professional & scientific | 2023 |
| Hawke Consulting Limited | Professional & scientific | 2014 |
| Hawkins Services Limited | Construction | 2015 |
| Hawksworth Consulting Ltd | Administrative & support | 2019 |
| Hayden Consulting Limited | Professional & scientific | 2024 |
| Hayden Wood Engineering Ltd. | Manufacturing | 2014 |
| Haydon Place Ltd | Professional & scientific | 2014 |
| Hayfever Ltd | Extraterritorial | 2012 |
| Haylock Productions Ltd | Information & communication | 2018 |
| Haywood Sener Ltd | Information & communication | 2013 |
| HB Property Investment Holdings Limited | Real estate | 2015 |
| HB Property Investment Limited | Real estate | 2015 |
| HBF (Westlake) Limited | Professional & scientific | 1996 |
| HCA Secretaries Limited | Extraterritorial | 2018 |
| HCB Headlease Limited | Real estate | 2023 |
| HCM Consultancy (UK) Limited | Professional & scientific | 2014 |
| HD Design and Build Ltd | Construction | 2015 |
| HD Exploration Limited | Mining & quarrying | 2016 |
| HD Roofing Solutions Ltd | Construction | 2014 |
| Hdmt Services Limited | Professional & scientific | 2016 |
| HDZ Group Ltd | Wholesale & retail | 2016 |
| Headley Housing Limited | Construction | 2025 |
| Headways Hair Salon Limited | Other services | 2008 |
| Healtechi Ltd | Information & communication | 2017 |
| Health Systems Support Limited | Information & communication | 2018 |
| Healthcare Source Limited | Wholesale & retail | 2013 |
| Hearability Ltd | Manufacturing | 2020 |
| Hearclear Surrey Ltd | Health & social care | 2025 |
| Hearne Holdco Company Ltd | Financial services | 2021 |
| Hearne Marble & Granite Limited | Construction | 2009 |
| Hearne Watches Ltd | Wholesale & retail | 2022 |
| Heart Brands UK Limited | Other services | 2015 |
| Heartstone Consulting Limited | Professional & scientific | 2025 |
| Heat Quote Limited | Manufacturing | 2025 |
| Heather Farm Limited | Real estate | 2014 |
| Heather Forster (West Byfleet) Limited | Wholesale & retail | 1964 |
| Heatherdene Limited | Health & social care | 2001 |
| Heathfield Close (GU22 7JQ) Management Company Ltd | Households | 2024 |
| Heathlands (Chobham) Management Company Limited | Households | 2005 |
| Heathray Services Limited | Administrative & support | 2007 |
| Heathrow Property Developments Limited | Real estate | 2017 |
| Heathside Consultancy Limited | Professional & scientific | 2022 |
| Heathside Property Holdings Limited | Financial services | 2023 |
| Heathside Property Ltd | Real estate | 2015 |
| Heavenly Essence Aromas Ltd | Wholesale & retail | 2009 |
| Heavent Ltd | Hospitality | 2025 |
| Hectare Investments Ltd | Real estate | 2024 |
| Hedges Management Ltd | Administrative & support | 2006 |
| Heineken Beverages (UK) Limited | Wholesale & retail | 2023 |
| Helen Smith Immigration Limited | Professional & scientific | 2015 |
| Helicraft Ltd | Transport & logistics | 2019 |
| Helios Advanced Energy Systems Limited | Administrative & support | 2014 |
| Hello Recruitment Limited | Administrative & support | 2021 |
| Helm & Smith Limited | Information & communication | 2026 |
| Helm Studio Group Limited | Professional & scientific | 2025 |
| Helmanta Ltd | Information & communication | 2025 |
| Help IS at Hand (Surrey) Ltd | Administrative & support | 2019 |
| Hemisphere Accounting Limited | Professional & scientific | 2009 |
| Hendward Limited | Administrative & support | 2023 |
| Hendy Motor Company Ltd | Wholesale & retail | 2024 |
| Henley Cycles Limited | Administrative & support | 2012 |
| Henly Developments 1001 Limited | Construction | 2026 |
| Henly Projects Limited | Construction | 2016 |
| Henlys Management and Accountancy Limited | Professional & scientific | 1999 |
| Henna Homestays Ltd | Real estate | 2024 |
| Hennichemaali Geosciences Limited | Mining & quarrying | 2017 |
| Henson Security Ltd | Administrative & support | 2016 |
| Heppenstall Chemindustrial Consulting Ltd | Professional & scientific | 2023 |
| Hepworth Adventures Ltd | Education | 2018 |
| Here & NOW Recordings Limited | Information & communication | 2005 |
| Heritage Awards Ltd | Wholesale & retail | 2011 |
| Heritage Development Solutions Limited | Wholesale & retail | 2026 |
| Heritage Fine Art Ltd | Wholesale & retail | 2013 |
| Heritage Hub Ltd | Education | 2023 |
| Hermitage Coffee House Ltd | Hospitality | 2024 |
| Hermitage Plotholders Limited | Real estate | 2012 |
| Heroic Marketing Ltd | Administrative & support | 2018 |
| Herrow Ltd | Administrative & support | 2017 |
| Hewlett Property Services Limited | Construction | 2025 |