| H&A Dwellings Limited | Real estate | 2025 |
| H.A.V Fulfillment Ltd | Wholesale & retail | 2023 |
| H.B.H. Salons Limited | Other services | 2019 |
| Haalving Limited | Arts & recreation | 2025 |
| HAB Amoment Ltd | Information & communication | 2016 |
| HAB Bar Limited | Hospitality | 2022 |
| HAB Property Ltd | Real estate | 2021 |
| HAB Services Ltd | Administrative & support | 2019 |
| Hacer Trading Limited | Other services | 2022 |
| Haidata Ltd | Information & communication | 2003 |
| Hale & Hewitt Limited | | 1981 |
| Haljan Limited | Professional & scientific | 2026 |
| Hampshire & Surrey Stone Ltd | Construction | 2020 |
| Hampshire Accountants International Limited | Professional & scientific | 2024 |
| Hampshire Accountants Limited | Professional & scientific | 2020 |
| Hampshire Cosmetic Smiles Ltd | Health & social care | 2016 |
| Hampshire Mortgages Limited | Financial services | 2024 |
| Hampshire Nepalese Cafe & Restaurant Ltd | Hospitality | 2018 |
| Hamro Pasal Private Limited | Wholesale & retail | 2025 |
| Hamro Travel and Tours PVT Ltd | Administrative & support | 2024 |
| Handyman-Pro (Hampshire) Limited | Construction | 2023 |
| Hangout Services Ltd | Other services | 2025 |
| Hansson Trading Ltd | Manufacturing | 2017 |
| Harbour Security Products Limited | Professional & scientific | 2005 |
| Hardrock Groundworks Ltd | Construction | 2022 |
| Hart Extrusion and Converting Services Limited | Professional & scientific | 2001 |
| Hashimi Limited | Wholesale & retail | 2014 |
| Havant Care Ltd | Health & social care | 2023 |
| Havard Technical Services Ltd | Arts & recreation | 2017 |
| Hayara Limited | Real estate | 2025 |
| Hayler Ltd | Wholesale & retail | 2025 |
| Haynote Limited | Wholesale & retail | 1974 |
| Hazelhurst PAB Limited | Real estate | 2021 |
| Haztas UK Consultancy Ltd | Professional & scientific | 2024 |
| HB Billington Ltd | Wholesale & retail | 2025 |
| HE Ramos Ltd | Health & social care | 2015 |
| Headway Marketing Ltd | Professional & scientific | 2015 |
| Health NET Connections Limited | Professional & scientific | 2008 |
| Healthcare Logistics Limited | Administrative & support | 2017 |
| Hearing Things Limited | Information & communication | 2006 |
| Heart and Hands Homecare Ltd | Health & social care | 2017 |
| Heat Eco Services Ltd | Construction | 2025 |
| Hedgehog Analytics Limited | Information & communication | 2019 |
| Helios Property Group Ltd | Real estate | 2019 |
| Helpika Limited | Health & social care | 2023 |
| Helping Hands and Smiles UK CIC | Health & social care | 2026 |
| Hemmings Protection Ltd | Administrative & support | 2026 |
| Henlys Estate Agents Limited | Real estate | 2006 |
| Hennessy Health and Safety Consultancy Ltd | Construction | 2023 |
| Hera Cars Ltd | Transport & logistics | 2023 |
| Herated Ltd | Information & communication | 2026 |
| Heritage Estate Planners Ltd | Financial services | 2019 |
| Hermes Alchemical Ltd | Wholesale & retail | 2024 |
| Heypac Limited | Manufacturing | 1978 |
| HF Communications Limited | Information & communication | 2016 |
| Hi-Fi Soft Suppliers Ltd | Extraterritorial | 2006 |
| Hi-Speed Services Limited | Transport & logistics | 1999 |
| Higgs & Higgs Ltd | Construction | 2021 |
| Higgys Heat Pumps Limited | Construction | 2025 |
| High Range Ltd | Education | 2025 |
| Highfield Energy Consulting Ltd | Professional & scientific | 2022 |
| Highlander Crew Ltd | Arts & recreation | 2024 |
| Hill 4 Leather Limited | Other services | 2008 |
| Hill Reach Marketing Ltd | Professional & scientific | 2026 |
| Hillbrooke Homes Ltd | Construction | 2025 |
| Himal Wiltshire Ltd | Hospitality | 2018 |
| Himalaya Capital Ltd | Hospitality | 2025 |
| Himalaya Gurkha Blandford Limited | Hospitality | 2021 |
| Himalayan Java (Europe) Limited | Hospitality | 2014 |
| Himalayan Nepalese Chulo Ltd | Hospitality | 2021 |
| Himalayan Oasis Ltd | Hospitality | 2023 |
| Himalayan Oriental Ltd | Wholesale & retail | 2025 |
| Himalayan Tours & Travel Limited | Administrative & support | 2012 |
| Himalayas' Traditional Jewellery Ltd | Wholesale & retail | 2024 |
| Hirepals Ltd | Administrative & support | 2020 |
| Hkôre Studios Limited | Arts & recreation | 2025 |
| HMR Plumbing & Maintenance Ltd | Construction | 2025 |
| HMS Eats Ltd | Hospitality | 2025 |
| Hogas Paving Ltd | Construction | 2024 |
| Hogs Back Bees & BEE Products Limited | Extraterritorial | 2019 |
| Hogs Back Builders Limited | Construction | 2013 |
| Hogs Back Homes Limited | Real estate | 2015 |
| Holland Health Limited | Professional & scientific | 2014 |
| Hollow Bloom Limited | Wholesale & retail | 2025 |
| Holly King Performing Arts Academy Ltd | Arts & recreation | 2023 |
| Holly Resident Ltd | Real estate | 2025 |
| Home 4 Letting Ltd | Other services | 2017 |
| Home Defence Services Ltd | Manufacturing | 2020 |
| Home Grown Tattoo Ltd | Other services | 2026 |
| Home-Dry UK Limited | Other services | 2012 |
| Homes on Helm Limited | Real estate | 2025 |
| HOMESGRG28 Limited | Real estate | 2025 |
| Honryu Studio Ltd | Education | 2023 |
| Hope Ariseuk CIC | Education | 2023 |
| Hope Grants Property Investments Ltd | Real estate | 2021 |
| Horizon Advisory Limited | Administrative & support | 2017 |
| House of Bowden Ltd | Real estate | 2024 |
| House of Margot Ltd | Construction | 2021 |
| HPS Properties Ltd | Real estate | 2012 |
| Hseq Limited | Professional & scientific | 2012 |