| Hart Project Solutions Ltd | Professional & scientific | 2013 |
| Hart Webb Limited | Extraterritorial | 2014 |
| Hartford Clinic Ltd | Health & social care | 2025 |
| Hartington Court Residents Management Company Limited | Households | 2019 |
| Hartley & Hayes Ltd | Construction | 2019 |
| Hartley Hall Gardens Limited | Households | 1999 |
| Hartmore Ltd | Professional & scientific | 2010 |
| Hartsholme Management Limited | Households | 2002 |
| Hartstone Holdings Ltd | Real estate | 2025 |
| Hartstone Properties Ltd | Real estate | 2026 |
| Harvey Consult Limited | Professional & scientific | 2021 |
| Harvey Performance UK Bidco Limited | Financial services | 2024 |
| Harwil Development Co. Limited | Construction | 1964 |
| Hashami Medical Services Ltd | Health & social care | 2024 |
| Haslam Meadows Limited | Real estate | 2021 |
| Hassan Abbas Ltd | Health & social care | 2020 |
| Hassy Properties Limited | Real estate | 2023 |
| Hastings Investments Limited | Real estate | 2004 |
| Hatch Life Sciences Ltd | Professional & scientific | 2025 |
| Hathaway Analytics Limited | Professional & scientific | 2024 |
| Hathor RA Limited | Professional & scientific | 2017 |
| Havannah Village Eaton Management Company Limited | Real estate | 2011 |
| Haven Accountancy & Tax Planning Limited | Professional & scientific | 2025 |
| Haven Financial Planning Limited | Financial services | 2023 |
| Haven Global Strategies Limited | Financial services | 2011 |
| Haven Health (Portsmouth) Limited | Real estate | 2019 |
| Haven Health (Shirley) Limited | Real estate | 2013 |
| Haven Protect Limited | Financial services | 2016 |
| Haven Wealth Planning Ltd | Financial services | 2025 |
| Havilah Medicals Limited | Health & social care | 2020 |
| Havilah Residentials Limited | Real estate | 2022 |
| Hawk Sports Events Consultancy Ltd | Professional & scientific | 2026 |
| Hawkins Performance Consulting Limited | Education | 2025 |
| Hawkstone Consulting Limited | Professional & scientific | 1998 |
| Hawkstone Financial Services Limited | Financial services | 2012 |
| Haworth Holt Bell (Trustees) Limited | Professional & scientific | 2004 |
| Haworth Holt Bell Limited | Professional & scientific | 2004 |
| Hawthorn Avenue Management Company Limited | Real estate | 2004 |
| Hawthorn Court Management (Bredbury) Limited | Households | 1971 |
| Hawthorn Green Management Company Limited | Households | 1994 |
| Hawthorn Legal Consultancy Limited | Professional & scientific | 2015 |
| Hawthorn Transformation Ltd | Professional & scientific | 2021 |
| Hayescroft Management Company Limited | Real estate | 2015 |
| Hayley Knight Planning Limited | Administrative & support | 2016 |
| Haymill Consulting Limited | Administrative & support | 2018 |
| Haywain Bergholt Limited | Professional & scientific | 2025 |
| Hazar Actuarial Ltd | Professional & scientific | 2023 |
| Hazara Building Construction & Consulting Engineers Ltd | Construction | 2016 |
| Hazelfield Management Company Limited | Households | 2009 |
| Hazelwood Trading Limited | Wholesale & retail | 2017 |
| HB Accident Repair Network Ltd | Wholesale & retail | 2020 |
| HB Computing Ltd | Other services | 2010 |
| HB Medicare Limited | Health & social care | 2017 |
| HB Properties Manchester Limited | Real estate | 2019 |
| Hbar PUB Company Ltd | Information & communication | 2014 |
| HBC Solutions Ltd | Professional & scientific | 2026 |
| HBK MEP Consultancy Limited | Professional & scientific | 2022 |
| Hbkd Capital Ltd | Information & communication | 2022 |
| HC Finance Solutions Limited | Professional & scientific | 2022 |
| HCW Group Limited | Professional & scientific | 1989 |
| HD Air Limited | Transport & logistics | 1990 |
| HD Educational Psychology Services Limited | Professional & scientific | 2024 |
| HD Manchester Properties Ltd | Real estate | 2024 |
| HD Manchester Trading Limited | Wholesale & retail | 1992 |
| HD Technologies Limited | Information & communication | 2024 |
| HDK Consultancy Limited | Administrative & support | 2024 |
| HEA HAA Ltd | Hospitality | 2022 |
| Headford Holdings Limited | Real estate | 2017 |
| Headkayse Ltd | Manufacturing | 2013 |
| Heaford Services Limited | Extraterritorial | 1982 |
| Heald Court Management Limited | Households | 1998 |
| Heald Green Property Company Limited | Real estate | 2023 |
| Heald Lawn (Bowdon) Management Limited | Hospitality | 1985 |
| Heald Mount Freehold Limited | Extraterritorial | 2014 |
| Healing Hubbb Ltd | Health & social care | 2024 |
| Health Equity Chain Ltd | Information & communication | 2025 |
| Health IQ Limited | Information & communication | 2011 |
| Health Properties (GP) Limited | Financial services | 2024 |
| Health Properties (NO 1 ) Limited | Real estate | 2024 |
| Health Properties (NO 2) UK Limited | Real estate | 2024 |
| Health Properties LP | | 2024 |
| Health Properties Midco Limited | Financial services | 2024 |
| Health Properties Nominee Limited | Financial services | 2024 |
| Healthcare Outcomes Performance Company Limited | Information & communication | 2014 |
| Healthcare Property Nominee Company NO 1 Limited | Extraterritorial | 2022 |
| Healthcare Property Nominee Company NO 2 Limited | Extraterritorial | 2022 |
| Healthco Investment Ltd | Financial services | 2025 |
| Healthco Investment Participations Ltd | Financial services | 2025 |
| Healthco Investment Solutions Ltd | Financial services | 2025 |
| Healthease Catalysts in Communities CIC | Information & communication | 2013 |
| Healthgenic Solutions Ltd | Information & communication | 2021 |
| Healthier Brands Limited | Manufacturing | 2015 |
| Healthipet Limited | Wholesale & retail | 2022 |
| Healthpartners Services Limited | Administrative & support | 2017 |
| Healthunlocked Holdings Limited | Information & communication | 2008 |
| Healthy Living Pharmacies Ltd. | Wholesale & retail | 2012 |
| Hearcare Solutions Limited | Health & social care | 2021 |
| Heart of the Lakes Limited | Real estate | 2018 |
| Hearth & Vale Limited | Administrative & support | 2026 |
| Hearthstone Tiling & Bathrooms Ltd | Construction | 2023 |