| Hambrough House Management Company Limited | Households | 2009 |
| Hamden Executive Search Limited | Administrative & support | 2010 |
| Hamilton Beck Designs Limited | Professional & scientific | 2022 |
| Hammond Facilities Ltd | Real estate | 2026 |
| Hamnton Construction Limited | Construction | 2003 |
| Hampden Property Limited | Real estate | 2022 |
| Hampden Ventures Limited | Real estate | 2020 |
| Hampshire Aerospace Consultancy Limited | Information & communication | 2022 |
| Hampshire Building & Maintenance Ltd | Construction | 2015 |
| Hampshire Business Networking Limited | Administrative & support | 2023 |
| Hampshire Car Storage Limited | Transport & logistics | 2012 |
| Hampshire Coffee Company Limited | Manufacturing | 2013 |
| Hampshire Cultural Trust | Arts & recreation | 2014 |
| Hampshire Cultural Trust Trading Ltd | Wholesale & retail | 2014 |
| Hampshire Diesel Services Limited | Wholesale & retail | 2006 |
| Hampshire Fare C.I.C. | Professional & scientific | 2009 |
| Hampshire Farmers Markets Limited | Wholesale & retail | 2000 |
| Hampshire Flowers Ltd | Wholesale & retail | 2012 |
| Hampshire Holsteins Ltd | Agriculture & fishing | 2021 |
| Hampshire Home Truths Limited | Administrative & support | 2018 |
| Hampshire Homekeeping Ltd | Administrative & support | 2025 |
| Hampshire Housing Ltd | Real estate | 2018 |
| Hampshire Inflatables Limited | Administrative & support | 2022 |
| Hampshire Ladies Golf Limited | Arts & recreation | 2019 |
| Hampshire Legal Services Limited | Professional & scientific | 2015 |
| Hampshire Logistics Limited | Transport & logistics | 2018 |
| Hampshire Market Garden CIC | Wholesale & retail | 2021 |
| Hampshire Notary Limited | Professional & scientific | 2018 |
| Hampshire Plumbing Limited | Construction | 2010 |
| Hampshire Proficiency Test Committee Limited | Professional & scientific | 2016 |
| Hampshire Resomation Limited | Other services | 2022 |
| Hampshire Scent Co. Limited | Wholesale & retail | 2022 |
| Hampshire Security Limited | | 1997 |
| Hampshire Wellness Partnership Ltd | Health & social care | 2023 |
| Hamza Ahmed Ltd | Information & communication | 2021 |
| Handmade Productions (Media) Ltd | Information & communication | 2004 |
| Hands of Time (Holdings) Ltd | Extraterritorial | 2023 |
| Hannah Shergold Limited | Arts & recreation | 2017 |
| Hannick Properties Holdings Limited | Financial services | 2015 |
| Hannick Properties Ltd | Real estate | 2012 |
| Happen Consulting & Development Limited | Professional & scientific | 2005 |
| Happy Humans Consulting Limited | Information & communication | 2026 |
| HAPPYFACE777 Ltd | Hospitality | 2025 |
| Harbour Place (Havant) Management Company Limited | Households | 2021 |
| Harcros Reach Limited | Wholesale & retail | 2011 |
| Hard Yards Global Limited | Financial services | 2017 |
| Harestock Management Company Limited | Real estate | 2013 |
| Harmalade Limited | Administrative & support | 2015 |
| Harman Simmons Consulting Limited | Health & social care | 2016 |
| Harmaureen Holdings Limited | Administrative & support | 2024 |
| Harmill (Painting Contractors) Limited | Wholesale & retail | 1960 |
| Harmin Holdings Limited | Real estate | 2017 |
| Harmonic Sedation Ltd | Health & social care | 2025 |
| Harmony Minerals Limited | Administrative & support | 2013 |
| Harolds Tyres Limited | Extraterritorial | 2002 |
| Harrap Computer Systems Limited | Information & communication | 2009 |
| Harriet Anstruther Studio Limited | Professional & scientific | 2011 |
| Harriett Grist Ltd | Manufacturing | 2017 |
| Harritons Homes Limited | Construction | 2013 |
| Harrow Drive Management Company Limited | Households | 1993 |
| Hart Financial Investments Ltd | Information & communication | 2024 |
| Hartley House Montessori Limited | Real estate | 1997 |
| Hartog Design and Interiors Ltd | Construction | 2025 |
| Hartshill Consulting Limited | Professional & scientific | 2018 |
| Harveys Holdings (Southern) Ltd | Real estate | 2020 |
| HAS Accounting Ltd | Professional & scientific | 2021 |
| Hatch Transport Services Limited | Transport & logistics | 2016 |
| Hatchet Films TV Limited | Information & communication | 2023 |
| Hatria Ltd | Manufacturing | 2024 |
| Hatton Grove Residents Association Limited | Households | 1979 |
| Haus Chandler's Ford Ltd | Other services | 2022 |
| Haus Maids Winchester Ltd | Other services | 2017 |
| Haven Healthcare South Ltd | Wholesale & retail | 2026 |
| Haven Landscapes Limited | Construction | 2003 |
| Hawkes & Horner Limited | Real estate | 2003 |
| Hawkings Consultants Limited | Financial services | 2012 |
| Hawthorn, Builders Limited | Construction | 2023 |
| Haylands Accommodation Ltd | Real estate | 2024 |
| Hayling Holdings Limited | Administrative & support | 2018 |
| Hayward Consulting (Poppets Hill) Limited | Professional & scientific | 2018 |
| Haywood Flooring Limited | Wholesale & retail | 2019 |
| Hazardous Waste Management Limited | Water & waste | 2009 |
| Hazel Court (Winchester) Limited | Administrative & support | 2004 |
| Hazel Storey Art Ltd | Wholesale & retail | 2009 |
| Hazeley Developments Limited | Construction | 2006 |
| Hazeley Group Limited | Real estate | 2005 |
| Hazelwood Sound and Vision Limited | Professional & scientific | 2015 |
| HB Ground Rents 2010 Limited Partnership | | 2010 |
| HB Joinery & Carpentry Ltd | Manufacturing | 2022 |
| HB Motorsports Ltd | Wholesale & retail | 2025 |
| HB Property Solutions Ltd | Real estate | 2020 |
| HCB Shops Ltd | Other services | 2012 |
| HCL Myco Ltd | Water & waste | 2023 |
| HCW Facilities Management Ltd | Administrative & support | 2010 |
| Headscape EOT Limited | Financial services | 2023 |
| Headup Ltd | Extraterritorial | 2019 |
| Headway Entertainments Ltd | Arts & recreation | 2014 |
| Heady & Company Limited | Professional & scientific | 2000 |
| Heady Investments Limited | Real estate | 1998 |
| Heal Africa UK | Health & social care | 2011 |