| Hair at O’Neill’S Limited | Other services | 2022 |
| Half Scale Cars Limited | Manufacturing | 2022 |
| Hallmark Civil Engineering Ltd | Construction | 2015 |
| Hampshi Heritage Limited | Hospitality | 2025 |
| Hampshire Blinds Limited | Wholesale & retail | 2021 |
| Hampshire Business Finance Limited | Financial services | 2016 |
| Hampshire Heating Services Ltd | Construction | 2020 |
| Hampshire Lawns Ltd | Administrative & support | 2024 |
| Hampshire Pest Services Limited | Administrative & support | 2017 |
| Hampshire Renewable Services Ltd | Extraterritorial | 2023 |
| Hampshire Summer Houses Limited | Construction | 2017 |
| Hampshire Vehicle Repairs Limited | Wholesale & retail | 2001 |
| Hampshire Wall Coatings Limited | Construction | 2003 |
| Hampshire Welding Limited | Professional & scientific | 2018 |
| Hand & Winzar Property Developments Limited | Construction | 2026 |
| Hands on Healthcare Pepi Ltd | Professional & scientific | 2018 |
| Hannah Verghese Ltd | Professional & scientific | 2021 |
| Hanover Computer Systems Limited | Information & communication | 1991 |
| Happy Days Business Support Ltd | Administrative & support | 2026 |
| Happy Sweet Ltd | Hospitality | 2023 |
| Harbour News Limited | Wholesale & retail | 2010 |
| Harbour Patrol Limited | Arts & recreation | 2004 |
| Harbro Properties (Hampshire) Ltd | Hospitality | 2025 |
| Hardway Marine Services Ltd | Transport & logistics | 2016 |
| Hardy Total Solutions Limited | Professional & scientific | 2026 |
| Hardys Consultancy Limited | Professional & scientific | 2015 |
| Hardys Style Limited | Other services | 2010 |
| Harriod Company Limited | Construction | 2021 |
| Harrison-Beaumont (Life and Pensions) Limited | Financial services | 1972 |
| Harrisons Vehicle Air Conditioning Limited | Wholesale & retail | 2011 |
| Harvest Fish and Meat Limited | Wholesale & retail | 2022 |
| Haslar Terrace Management Limited | Households | 2018 |
| Haven Holistic Therapy Ltd | Health & social care | 2014 |
| Hawksvale Developments Limited | Construction | 2024 |
| HAY Subsea Cable Solutions Ltd | Mining & quarrying | 2016 |
| Hayley Madigan Media Ltd | Arts & recreation | 2020 |
| Hazarsah Catering Ltd | Hospitality | 2024 |
| Hazell Spence Contractors Ltd | Construction | 2025 |
| Hdad Holdings Limited | Real estate | 2017 |
| Headprism Ltd | Administrative & support | 2006 |
| Health Energiser Limited | Other services | 2022 |
| Heart and Dagger Ltd | Other services | 2021 |
| Heart Family Group Ltd | Hospitality | 2024 |
| Heartwood Property Ltd | Hospitality | 2014 |
| Heatology Installations Limited | Construction | 2021 |
| Heer Services Ltd | Manufacturing | 2021 |
| Heimdall Alarms Ltd | Administrative & support | 2025 |
| Helley Ltd | Information & communication | 2025 |
| Herridge Interiors Limited | Construction | 2026 |
| Hewett Properties Ltd | Real estate | 2009 |
| Hexatronic UK Ltd | Wholesale & retail | 2007 |
| Heyworth Medical Consultancy Limited | Health & social care | 2015 |
| HF Property Ltd | Real estate | 2025 |
| Hi-Spec Building Services Limited | Construction | 2008 |
| Hidalgo Homes Ltd | Real estate | 2026 |
| Highlands Practice Services Limited | Health & social care | 2025 |
| Hill Head Home Improvements Limited | Construction | 2015 |
| HIM & HER Limited | Information & communication | 2016 |
| Hire ROO Ltd | Administrative & support | 2021 |
| HIT the Road STF Ltd | Hospitality | 2021 |
| Hives for Heros Ltd | Administrative & support | 2026 |
| HJ Engineering Solutions Limited | Professional & scientific | 2025 |
| HL Fibre & Construction Ltd | Construction | 2024 |
| HMP Property Limited | Real estate | 2017 |
| HMS Plumbing Ltd | Construction | 2026 |
| HO Marketing Communications Ltd | Other services | 2013 |
| Hobbs Court (Gosport) M.C. Limited | Administrative & support | 1995 |
| Holdway Consulting Limited | Information & communication | 2025 |
| Hollyrush Developments Ltd | Real estate | 2000 |
| Horndean Services Ltd | Wholesale & retail | 2008 |
| Hornet Services Sailing Club Limited | Arts & recreation | 2021 |
| Hot Cat Ltd | Information & communication | 2025 |
| House of Hair and Beauty Gosport Ltd | Other services | 2019 |
| Houserack Ltd | Real estate | 2014 |
| HPS Accounting Services Limited | Professional & scientific | 2017 |
| Hudson Marine Services Ltd | Construction | 2024 |
| Huhtamaki (UK) Limited | Manufacturing | 1969 |
| Huhtamaki Anglo Holding | Financial services | 2001 |
| Huhtamaki Finance Limited | Financial services | 2012 |
| Human AI Robotics Limited | Professional & scientific | 2022 |
| Humanitech Limited | Information & communication | 2018 |
| Humble Tree Care Limited | Administrative & support | 2024 |
| Humble.B Limited | Wholesale & retail | 2018 |
| Hurstlea Quality Services Ltd | Other services | 2004 |
| HVR Holdings Ltd. | Financial services | 2006 |
| HWE0004 Ltd | Professional & scientific | 2021 |
| HWE0014 Ltd | Professional & scientific | 2021 |
| Hydroeye Limited | Construction | 2016 |
| I Harper | Construction | 2006 |
| Icarus Systems Limited | Transport & logistics | 2000 |
| Iconum Solutions Limited | Real estate | 2007 |
| Idemir Ltd | Other services | 2022 |
| Idevicefixer Ltd | Other services | 2014 |
| IDS Services Ltd | Construction | 2007 |
| Idzi Developments Ltd | Real estate | 2025 |
| Ikonix Bikes Limited | Wholesale & retail | 2025 |
| IMA Properties South Coast Limited | Real estate | 2020 |
| Imogen Dufty Ltd | Information & communication | 2025 |
| Impact Mechanic Ltd | Manufacturing | 2024 |
| Impeccia Limited | Health & social care | 2000 |