| Hampshire Roofcare Ltd | Construction | 2025 |
| Hampshire Roofing Specialists Limited | Construction | 2019 |
| Hampshire Room Conditioners Limited | Construction | 2025 |
| Hampshire Saddlery Ltd | Wholesale & retail | 2013 |
| Hampshire Surface Treatments Ltd | Extraterritorial | 2013 |
| Hampshire TM Ltd | Construction | 2025 |
| Hampshire Wide Limited | Real estate | 2019 |
| Hampshire Window Cleaning Services Limited | Administrative & support | 2006 |
| Hampton Media Ltd | Other services | 2019 |
| Hampton Security Services Ltd | Administrative & support | 2023 |
| Hamson Holdings Ltd | Financial services | 2025 |
| Hamwic Technical Products Ltd | Wholesale & retail | 2023 |
| Hanbury Hill Limited | Real estate | 2009 |
| Hand Clinic Medico-Legal Limited | Professional & scientific | 2010 |
| Handani Holdings Limited | Real estate | 2022 |
| Handroll Tokyo UK Ltd | Hospitality | 2026 |
| Hands Consultants Limited | Information & communication | 2000 |
| Handy Haydn Ltd | Construction | 2026 |
| Hansen Capital Limited | Financial services | 2025 |
| Hansen Goodlad Limited | Construction | 2011 |
| Hansen Homes Developments Limited | Financial services | 2021 |
| Hansen Property Limited | Administrative & support | 2019 |
| Hants Ride Limited | Transport & logistics | 2024 |
| Hantsmech Ltd | Construction | 2024 |
| Happily Ever Arty Ltd | Arts & recreation | 2020 |
| Happy Landlords Ltd | Real estate | 2020 |
| Happy Promotions Limited | Arts & recreation | 2002 |
| Harborrock Investments Ltd | Transport & logistics | 2024 |
| Harbourside Support Services Ltd | Health & social care | 2026 |
| Harding Way (Marcham) Management Company Limited | Households | 2015 |
| Hardy Property Solutions Ltd | Construction | 2016 |
| Harestock Garage Limited | Wholesale & retail | 1978 |
| Harleyquinn Ltd | Construction | 2015 |
| Harmony Habits Ltd | Wholesale & retail | 2025 |
| Harmony Innovations Limited | Wholesale & retail | 2023 |
| Harness Ltd | Administrative & support | 2023 |
| Haroon Properties and Developers Limited | Real estate | 2019 |
| Harper and Mason Ltd | Professional & scientific | 2022 |
| Harper Evans Recruitment Limited | Administrative & support | 2018 |
| Harpp Group Limited | Professional & scientific | 2026 |
| Harrap Limited | Wholesale & retail | 2004 |
| Harriker Ltd | Construction | 2009 |
| Harrison Building Contractors Ltd | Construction | 2019 |
| Harrison Garden Landscaping Ltd | Administrative & support | 2025 |
| Harrow Drive (Headley) Management Company Limited | Households | 2014 |
| Harry Joshua Designs Ltd | Manufacturing | 2021 |
| Harvey's Painting & Decorating Ltd | Extraterritorial | 2018 |
| Harvey-Smith Associates Limited | Professional & scientific | 2011 |
| Harvey-Smith Property Limited | Real estate | 2021 |
| Hase Clinic Ltd | Health & social care | 2022 |
| Haslam Consultancy Limited | Professional & scientific | 1997 |
| Hatch Autochemicals (1992) Limited | Wholesale & retail | 1992 |
| Hatstand Opera Limited | Extraterritorial | 1994 |
| HAV Consult Limited | Professional & scientific | 2016 |
| HAV Group Limited | Financial services | 2022 |
| HAV Sotc Ltd | Real estate | 2022 |
| Havant Container Storage Ltd | Transport & logistics | 2017 |
| Haveli Homes Limited | Real estate | 2019 |
| Haven Gardens Limited | Administrative & support | 2013 |
| Haven Publishing Limited | Information & communication | 2006 |
| Haveri Transport Ltd | Transport & logistics | 2019 |
| Hawfinch Limited | Administrative & support | 2018 |
| Hawkmoor Books Ltd | Wholesale & retail | 2008 |
| Hawthorn Store Limited | Wholesale & retail | 2015 |
| Haycal Traditional Ltd | Construction | 2020 |
| Haycen Limited | Information & communication | 2019 |
| Hayden Construction Management Ltd | Construction | 2016 |
| Hayhurst Jackson Limited | Professional & scientific | 1994 |
| Hays Consulting Ltd | Professional & scientific | 2020 |
| Hayward and Spanswick (Electrical Contractors) 1996 Limited | Construction | 1978 |
| Hayward Pipe-Work Services Limited | Construction | 2015 |
| Haywayne Limited | Wholesale & retail | 2018 |
| Haywood Office Services Limited | Wholesale & retail | 2009 |
| Hazcore Limited | Water & waste | 2026 |
| Hazemist Ltd | Information & communication | 2022 |
| HBL Builders and Contractors Limited | Construction | 1994 |
| HBS Group Southern Ltd | Construction | 1987 |
| HCB Foundation | Professional & scientific | 2014 |
| HCE Foodservice Equipment Limited | Extraterritorial | 2021 |
| HCM Transport Ltd | Transport & logistics | 2026 |
| HCP (Estate Management) Limited | Real estate | 2012 |
| HCR Enterprises Limited | Administrative & support | 2007 |
| Head Consulting Ltd | Manufacturing | 2019 |
| Headlight Training Services Limited | Other services | 2017 |
| Headline Teacher Recruitment Ltd | Administrative & support | 2003 |
| Healing Hope Ltd | Education | 2022 |
| Healing Therapy Ltd | Health & social care | 2023 |
| Health and Hope UK | Education | 2012 |
| Health Integration Partners Ltd | Professional & scientific | 2019 |
| Healthior Limited | Information & communication | 2023 |
| Hear Moore Ltd | Health & social care | 2026 |
| Hearn Freehold Ltd | Real estate | 2024 |
| Hearn Holdings Limited | Construction | 2022 |
| Hearn Leases Ltd | Real estate | 2024 |
| Hearn Morley Limited | Administrative & support | 2012 |
| Heart Healthcare Limited | Health & social care | 2015 |
| Heart of Roundshaw Management Company Limited | Real estate | 2001 |
| Hearth Insights Ltd | Information & communication | 2025 |
| Heathfield Square Green Side Management Limited | Households | 1999 |
| Heathwind Enterprises Ltd | Real estate | 2011 |