| Hackney Specsavers Limited | Wholesale & retail | 2013 |
| Hadan Group Ltd. | Professional & scientific | 1992 |
| Haddington Specsavers Limited | Wholesale & retail | 2023 |
| Hade Services Ltd | Water & waste | 2023 |
| Hadley Air Holdings Limited | Financial services | 2024 |
| Hadley Air Limited | Construction | 2011 |
| HAI Air Ltd | Professional & scientific | 2017 |
| HAI Tech Services Limited | Information & communication | 2022 |
| Hailsham Specsavers Limited | Wholesale & retail | 2017 |
| Hair by Hannah Bernard Ltd | Other services | 2023 |
| Hairthree Limited | Other services | 2011 |
| Halcyon Management Group Limited | Professional & scientific | 2025 |
| Halesowen Specsavers Limited | Wholesale & retail | 2002 |
| Halesowen Visionplus Limited | Wholesale & retail | 2002 |
| Halewood Specsavers Limited | Wholesale & retail | 2017 |
| Half Space Coffee Limited | Hospitality | 2025 |
| Halfpenny Transport Ltd | Transport & logistics | 2025 |
| Halifax Specsavers Hearcare Limited | Wholesale & retail | 2025 |
| Halifax Specsavers Limited | Wholesale & retail | 1988 |
| Halifax Visionplus Limited | Wholesale & retail | 1994 |
| Halo Bottle Ltd | Wholesale & retail | 2018 |
| Halo Jones Limited | Health & social care | 2013 |
| Hamble Valley Care Limited | Health & social care | 2013 |
| Hamble Valley Livein Care Limited | Health & social care | 2020 |
| Hamilton House Management Company (Portsmouth) Limited | Households | 1999 |
| Hamilton International Acquisitions Limited | Administrative & support | 2026 |
| Hamilton Specsavers Limited | Wholesale & retail | 1992 |
| Hamilton Visionplus Limited | Wholesale & retail | 1992 |
| Hammerley Farm Management Limited | Households | 2017 |
| Hammersmith Specsavers Limited | Wholesale & retail | 1998 |
| Hammersmith Visionplus Limited | Wholesale & retail | 1998 |
| Hammond Carpentry Ltd | Manufacturing | 2019 |
| Hammond Commercial Services Limited | Construction | 2011 |
| Hammond Plumbing Ltd | Construction | 2025 |
| Hammond Properties Limited | Construction | 2015 |
| Hammond Recruitment Group Limited | Administrative & support | 2010 |
| Hampshire & Oakwood Real Estates Ltd | Transport & logistics | 2025 |
| Hampshire & Oakwood Transports Ltd | Transport & logistics | 2026 |
| Hampshire Association for Counselling and Psychotherapy Limited | Administrative & support | 2026 |
| Hampshire Care Services Ltd | Health & social care | 2022 |
| Hampshire Chamber of Commerce | Administrative & support | 1875 |
| Hampshire Chambers of Commerce | Professional & scientific | 2003 |
| Hampshire Curtain Makers Limited | Manufacturing | 2020 |
| Hampshire Driveways Ltd | Construction | 2019 |
| Hampshire Drone Ltd | Extraterritorial | 2017 |
| Hampshire Equestrian Ltd | Wholesale & retail | 2022 |
| Hampshire Food Revolution CIC | Hospitality | 2019 |
| Hampshire Garden Services Ltd | Administrative & support | 2025 |
| Hampshire Gardencraft Limited | Manufacturing | 1992 |
| Hampshire Groundworks Ltd | Professional & scientific | 2015 |
| Hampshire Hair Clinic Ltd | Other services | 2023 |
| Hampshire Healthcare Ltd | Health & social care | 2023 |
| Hampshire Home Developments Ltd | Construction | 2021 |
| Hampshire Home Improvements Limited | Construction | 2013 |
| Hampshire Leather Care Limited | Administrative & support | 2024 |
| Hampshire Maintenance Free Gardens Limited | Construction | 2023 |
| Hampshire Newmedica Limited | Health & social care | 2023 |
| Hampshire Pallets (PSP) Limited | Manufacturing | 2019 |
| Hampshire Performance Ltd | Wholesale & retail | 2025 |
| Hampshire Property (Services) Ltd | Construction | 2011 |
| Hampshire Rail Managment Services Limited | Construction | 2021 |
| Hampshire Rendering Ltd | Construction | 2022 |
| Hampshire Resin & Pave Ltd | Construction | 2019 |
| Hampshire Rugby Referees Limited | Arts & recreation | 2017 |
| Hampshire School of Flying Limited | Extraterritorial | 2013 |
| Hampshire Stone Care Ltd | Construction | 2022 |
| Hampshire Sun Limited | Professional & scientific | 2005 |
| Hampshire Tattoo Removal Ltd | Other services | 2017 |
| Hampton Specsavers Limited | Wholesale & retail | 2015 |
| Hampton Square Living Limited | Real estate | 2021 |
| Hamwic Investments Limited | Real estate | 2018 |
| Hand & Winzar Property Group Ltd | Real estate | 2026 |
| Handmade on the High Street Ltd | Administrative & support | 2020 |
| Hands & SON Ltd | Wholesale & retail | 2019 |
| Hands & SON Rail Ltd | Manufacturing | 2019 |
| HANGAR47 Ltd | Information & communication | 2025 |
| HANGAR47.DIGITAL Limited | Professional & scientific | 2024 |
| HANGAR47.MEDIA Ltd | Information & communication | 2019 |
| Hankit Global Limited | Health & social care | 2023 |
| Hanley Business Services Limited | Professional & scientific | 2013 |
| Hanley Specsavers Hearcare Limited | Wholesale & retail | 2003 |
| Hansons Hair Studio Limited | Other services | 2010 |
| Hants Marine Limited | Professional & scientific | 2002 |
| Hants Games Company Ltd | Administrative & support | 2023 |
| Hants House and Home Limited | Manufacturing | 2020 |
| Hants Logistics Ltd | Transport & logistics | 2020 |
| Hants Transport Ltd | Transport & logistics | 2026 |
| Hantsbridge Limited | Construction | 2008 |
| Happy Apps Company Limited | Information & communication | 2012 |
| Happy Dayz Domiciliary Care Ltd | Health & social care | 2014 |
| Happy Hounds Dog Care Ltd | Other services | 2015 |
| Happy Little Hearts Daycare Ltd | Education | 2025 |
| Happy Mindz Limited | Education | 2015 |
| Happy Place Events Ltd | Hospitality | 2024 |
| Hapury Ltd | Other services | 2022 |
| Harborne Specsavers Hearcare Limited | Wholesale & retail | 2012 |
| Harborne Specsavers Limited | Wholesale & retail | 2011 |
| Harbour Gate Estate Management Company Limited | Households | 1999 |
| Harcup Consulting Limited | Professional & scientific | 2017 |
| Hardgrave Virtual Assistance Ltd | Administrative & support | 2023 |