| Hallion Associates Limited | Professional & scientific | 2025 |
| Halloran & Montague Associates Limited | Health & social care | 2018 |
| Halo Integrated Care Solutions Ltd | Information & communication | 2025 |
| Hamar Solutions Ltd. | Information & communication | 2024 |
| Hambledon Barbars Ltd | Other services | 2022 |
| Hambledon Landscapes Limited | Administrative & support | 2015 |
| Hambledon Plumbing and Heating Ltd | Construction | 2017 |
| Hambledon Property Services Ltd | Real estate | 2018 |
| Hambledon Trees Limited | Extraterritorial | 2022 |
| Hambledon Vineyard Limited | Manufacturing | 2010 |
| Hambledon Wineries Limited | Manufacturing | 2009 |
| Hambleside Merchandise Limited | Administrative & support | 2003 |
| Hampshire & Regional Consultancy Services Limited | Other services | 2012 |
| Hampshire Building and Refurbishment Ltd | Construction | 2025 |
| Hampshire Carpentry and Developments Ltd | Construction | 2018 |
| Hampshire Children's Diagnostics Ltd | Health & social care | 2021 |
| Hampshire Co Living Ltd | Construction | 2023 |
| Hampshire Coins and Bullion Limited | Wholesale & retail | 2026 |
| Hampshire Contractors Ltd | Construction | 2016 |
| Hampshire Drainage Limited | Construction | 2021 |
| Hampshire Drainage Solutions Ltd | Professional & scientific | 2012 |
| Hampshire Ecological Services Limited | Professional & scientific | 2010 |
| Hampshire Fencing Limited | Administrative & support | 2022 |
| Hampshire Flag Company Limited | Manufacturing | 2002 |
| Hampshire Grounds Limited | Administrative & support | 2017 |
| Hampshire Group Contracts Ltd | Construction | 2025 |
| Hampshire Group Southern Ltd | Construction | 2024 |
| Hampshire Health Associates Limited | Professional & scientific | 2022 |
| Hampshire Highway Services Limited | Construction | 2018 |
| Hampshire Home Survey Limited | Real estate | 2021 |
| Hampshire Insulations Limited | Construction | 2012 |
| Hampshire Lift Services (Southern) Ltd | Professional & scientific | 2012 |
| Hampshire Lift Services Ltd | Professional & scientific | 2022 |
| Hampshire Multi-Trade Services Limited | Construction | 2020 |
| Hampshire Paediatricians Ltd | Public administration | 2024 |
| Hampshire Paving & Construction Limited | Construction | 2017 |
| Hampshire Plant & Tool Hire Ltd | Administrative & support | 2025 |
| Hampshire PUB Co Ltd | Hospitality | 2018 |
| Hampshire Recovery Services Ltd | Transport & logistics | 2026 |
| Hampshire Removals Ltd | Transport & logistics | 2021 |
| Hampshire Rose Widley Ltd | Hospitality | 2023 |
| Hampshire Short-Term Lets Ltd | Real estate | 2023 |
| Hampshire Skin Care Limited | Health & social care | 2019 |
| Hampshire TCG Odyssey Ltd | Wholesale & retail | 2025 |
| Hampshire Tree & Garden Care Ltd | Agriculture & fishing | 2025 |
| Hampshire Waste Clearance Services Limited | Water & waste | 2014 |
| Hana Barber Ltd | Other services | 2021 |
| Hancock Financial Services Limited | Financial services | 2002 |
| Hancock Financial Solutions Limited | Financial services | 2010 |
| Handler Global Limited | Wholesale & retail | 2022 |
| Handy Andy Lawn Care Limited | Administrative & support | 2024 |
| Handy M London Ltd | Construction | 2019 |
| Handyjimbo Ltd | Construction | 2023 |
| Hangar 6 (North Weald) Limited | Other services | 1989 |
| Hannells Foods Ltd | Wholesale & retail | 2024 |
| Hans Singh Consulting Limited | Professional & scientific | 2025 |
| Hants & Berks Motor Club Limited | Arts & recreation | 1987 |
| Hants Haulage Limited | Transport & logistics | 2015 |
| Happi Homes Services Ltd | Administrative & support | 2025 |
| Happy Hearts Preschool Limited | Health & social care | 2015 |
| Happy Planet Cleaning Services Ltd | Administrative & support | 2022 |
| Happycommon UK Ltd | Wholesale & retail | 2024 |
| Harbour & Downs Ltd | Construction | 2025 |
| Harbour Bespoke Ltd | Administrative & support | 2025 |
| Harbour Clean (South) Limited | Transport & logistics | 2009 |
| Harbour Watch Development Limited | Construction | 2016 |
| Harbourside Contracting Limited | Construction | 2024 |
| Harbourstone Associates Limited | Real estate | 2025 |
| Harbourstone Design Limited | Professional & scientific | 2025 |
| Hard UP Garage Limited | Wholesale & retail | 2016 |
| Hardenbroek Limited | Financial services | 2006 |
| Hardman Pictures Limited | Information & communication | 2015 |
| Hark Holdings Limited | Financial services | 2020 |
| Harleigh Legal Services Ltd | Professional & scientific | 2016 |
| Harley Cosmetic Surgery Management Limited | Health & social care | 2021 |
| Harleys Angels A&D Ltd | Information & communication | 2025 |
| Harmony Corporation Limited | Households | 1995 |
| Harold & IVY Interior Design Limited | Professional & scientific | 2025 |
| Haroon Azizi Limited | Wholesale & retail | 2024 |
| Harper Rhodes Limited | Administrative & support | 2025 |
| Harplace Estates Limited | Real estate | 2021 |
| Harplace Homes Limited | Real estate | 2023 |
| Harrier Consulting Southern Ltd | Financial services | 2023 |
| Harrow Bridal Design Limited | Other services | 2018 |
| Harry Kavanagh Holdings Ltd | Financial services | 2023 |
| Harry Kavanagh Properties Limited | Households | 2024 |
| Hart Plain Management Company Limited | Households | 2015 |
| Hart Plain Services Ltd | Information & communication | 2019 |
| Hart-Intelligence Limited | Administrative & support | 2025 |
| Hartlepool Homes Limited | Real estate | 2020 |
| Hartridge Properties Limited | Real estate | 2011 |
| Hartridges (Group) Limited | Financial services | 2012 |
| Hartridges Limited | Manufacturing | 1934 |
| Harvest Inns Limited | Hospitality | 2025 |
| Harvey Brickwork Ltd | Construction | 2024 |
| Harvey Burns Investments Limited | Other services | 2022 |
| Haslemere Developments Ltd | Construction | 2026 |
| Haslemere Driving School Limited | Education | 2003 |
| Hasm Limited | Hospitality | 2025 |
| Hassett Cubed Limited | Real estate | 2016 |