| Hampshire Incorporated Law Society | Professional & scientific | 1897 |
| Hampshire Inns Limited | Hospitality | 2026 |
| Hampshire Labour 4 U Ltd | Construction | 2017 |
| Hampshire Mechanical Ltd | Construction | 2025 |
| Hampshire Metal Coatings Limited | Manufacturing | 2020 |
| Hampshire Metalcrafts Limited | Professional & scientific | 2003 |
| Hampshire Neurodiversity Clinic Ltd | Health & social care | 2023 |
| Hampshire Pet Cremations Ltd | Other services | 2023 |
| Hampshire Plumbing & Heating PO Limited | Construction | 2019 |
| Hampshire Plumbing & Heating Solutions Limited | Construction | 2017 |
| Hampshire Portfolio Ltd | Real estate | 2018 |
| Hampshire Premium Travel Ltd | Transport & logistics | 2024 |
| Hampshire Preservation Services Limited | Construction | 2006 |
| Hampshire Prints Ltd | Manufacturing | 2023 |
| Hampshire Property Management Ltd | Administrative & support | 2008 |
| Hampshire Property Solutions Ltd | Real estate | 2022 |
| Hampshire Recovery Ltd | Transport & logistics | 2018 |
| Hampshire Security Services Ltd | Administrative & support | 2023 |
| Hampshire Semi Permanent Make UP Limited | Other services | 2014 |
| Hampshire Signs & Graphics Ltd | Manufacturing | 2007 |
| Hampshire Stage Solutions Ltd | Administrative & support | 2023 |
| Hampshire Transport Solutions Limited | Transport & logistics | 2021 |
| Hampshire Tyres Ltd | Wholesale & retail | 2025 |
| Hampshire-Nrg Ltd | Construction | 2012 |
| Hampshirecanna Ltd | Wholesale & retail | 2018 |
| Hampshireroofingworks Ltd | Construction | 2024 |
| Hamrahbaam Limited | Real estate | 2025 |
| Hamroad Residents Association Limited | Hospitality | 1989 |
| Hanabenair Limited | Construction | 1999 |
| Hancock Decorating Contractors Ltd | Construction | 2024 |
| Hands-On Homes Ltd | Construction | 2010 |
| Handshaikh Limited | Professional & scientific | 1995 |
| Handsome Barber & Beauty Ltd | Other services | 2025 |
| Hankin Property Investments Limited | Real estate | 2019 |
| Hants Portfolio Ltd | Real estate | 2023 |
| Hanway International Market Ltd | Wholesale & retail | 2025 |
| Happy Dental Laboratory Ltd | Manufacturing | 2015 |
| Happy Tray UK Ltd | Hospitality | 2020 |
| Harbour Property Holdings Limited | Real estate | 2026 |
| Harbour Taverns Limited | Hospitality | 2024 |
| Harbourside Films Limited | Information & communication | 2023 |
| Harbourside Safety Ltd | Professional & scientific | 2025 |
| Harbwood Holdings Limited | Financial services | 2024 |
| Hard Hats Recruitment Ltd | Construction | 2024 |
| Hard Holdings Ltd | Real estate | 2023 |
| Hard Shield Ltd | Education | 2025 |
| Hardman Court Limited | Households | 1987 |
| Hardy Asset Management Limited | Professional & scientific | 1999 |
| Hardy Capital Limited | Financial services | 2025 |
| Harford & Sons Ltd | Construction | 2024 |
| Harge Investments Ltd | Real estate | 2020 |
| Hargreaves & Wright Limited | Information & communication | 2008 |
| Hargreaves Promotions Ltd | Wholesale & retail | 2020 |
| Hargreaves Strategy Consultants Ltd | Professional & scientific | 2012 |
| Harinaman Retail Ltd | Wholesale & retail | 2026 |
| Harkham Technologies Ltd | Professional & scientific | 2024 |
| Harlands Building Services Ltd | Construction | 2023 |
| Harlequins Gymnastics | Arts & recreation | 2011 |
| Harman Consulting Limited | Other services | 2016 |
| Harman Investments Ltd | Financial services | 2024 |
| Harmany Ltd | Wholesale & retail | 2023 |
| Harmonix Accounting Limited | Professional & scientific | 2013 |
| Harnbrooke Homes Limited | Construction | 2023 |
| Harney Global Associates Ltd | Professional & scientific | 2017 |
| Harperseo Ltd | Information & communication | 2014 |
| Harris & Steadman Ltd | Other services | 2024 |
| Harris & Wells Building Services Ltd | Construction | 2019 |
| Harris Homes and Estate Ltd | Financial services | 2022 |
| Harris Total Carpentry Limited | Construction | 2007 |
| Harris-Cotterell Ltd | Health & social care | 2022 |
| Harrison Industrial Limited | Manufacturing | 1984 |
| Harrowby House Management Company Limited | Extraterritorial | 1984 |
| Harry Wingate Limited | Administrative & support | 2013 |
| Harsfold Close Residents' Association Limited | Households | 1967 |
| Harshey Medical Enterprises Ltd | Health & social care | 2016 |
| Hartford House Limited | Households | 2003 |
| Harting Hill Ltd | Real estate | 2016 |
| Hartley Building Services Ltd | Construction | 2026 |
| Hartley Conservatories Limited | Construction | 2005 |
| Hartley Windows Limited | Manufacturing | 2003 |
| Hartnett Glass Limited | Construction | 2008 |
| Harvest Home Copnor Limited | Hospitality | 2010 |
| Harvest Marketing Communications Limited | Administrative & support | 2001 |
| Harvey Family Holdings Ltd | Financial services | 2026 |
| Harvey Loveless Construction Ltd | Construction | 2026 |
| Harvey Loveless Group Ltd | Financial services | 2026 |
| Harvey Projects Ltd | Professional & scientific | 2026 |
| Harvil Limited | Manufacturing | 1989 |
| Harwin PLC | Manufacturing | 1952 |
| Harwin Technology Company Limited | Extraterritorial | 2020 |
| Hasa Hand Car Wash Ltd | Transport & logistics | 2017 |
| Haskudon Limited | Hospitality | 2024 |
| Haslemere Road Garage Ltd | Wholesale & retail | 2010 |
| Hassan-Hicks Investments Ltd | Real estate | 2017 |
| Hatley UK Limited | Wholesale & retail | 2007 |
| Havant & Emsworth Laundrettes Limited | Other services | 2007 |
| Havant & Waterlooville Eats Ltd | Hospitality | 2021 |
| Havant Building Services Ltd | Construction | 2004 |
| Havant Carpentry Services Limited | Manufacturing | 2002 |
| Havant Hand Car Wash Ltd | Wholesale & retail | 2019 |