| Hall Brickwork Limited | Construction | 2016 |
| Hall Hvac Limited | Energy | 2023 |
| Hallett Productions Ltd | Arts & recreation | 2015 |
| Hallett’S Early Years Photography Ltd | Professional & scientific | 2021 |
| Halligan Maritime Limited | Administrative & support | 2020 |
| Hallmark Health and Data Engineering Limited | Hospitality | 2013 |
| Hallum Scaffolding Services Ltd | Construction | 2025 |
| Halo Corporate FX Ltd | Professional & scientific | 2025 |
| Halo Electrical and Fire Services Ltd | Construction | 2011 |
| Halo Marketing Solutions Ltd. | Professional & scientific | 2013 |
| Halsham Property Ltd | Real estate | 2023 |
| Halyards Consultants Limited | Professional & scientific | 2025 |
| Hamble Accountancy Ltd | Professional & scientific | 2017 |
| Hamble Aerostructures Limited | Manufacturing | 2019 |
| Hamble Catering Ltd | Hospitality | 2017 |
| Hamble Cliff House Management Company Limited | Households | 1989 |
| Hamble Coaching and Training Limited | Professional & scientific | 2019 |
| Hamble Cottage Dental Practice Limited | Health & social care | 2014 |
| Hamble Court Estates Limited | Construction | 1987 |
| Hamble Engineering Services Limited | Professional & scientific | 2017 |
| Hamble Garage Limited | Wholesale & retail | 2012 |
| Hamble Healthcare Ltd | Health & social care | 2023 |
| Hamble Heating Services Limited | Manufacturing | 2006 |
| Hamble Lifeboat Limited | Public administration | 1972 |
| Hamble Limited | Manufacturing | 2024 |
| Hamble Motors Limited | Wholesale & retail | 1954 |
| Hamble Propellers Limited | Manufacturing | 2008 |
| Hamble Properties Limited | Real estate | 1999 |
| Hamble Property Development Ltd | Construction | 2018 |
| Hamble Property Hosts Ltd | Hospitality | 2019 |
| Hamble Residential Property Ltd | Other services | 2018 |
| Hamble Riverside Houses Limited | Households | 1998 |
| Hamble Solutions Ltd | Administrative & support | 2008 |
| Hamble Spit Limited | Financial services | 2025 |
| Hamble Valley Press Limited | Real estate | 1983 |
| Hamble Yacht Brokers Ltd | Wholesale & retail | 2019 |
| Hamble Yacht Delivery Limited | Transport & logistics | 1987 |
| Hamble Yacht Services Limited | Other services | 2014 |
| Hamblewood Consultancy Services Ltd | Professional & scientific | 2023 |
| Hambridge Property Holdings Limited | Real estate | 2022 |
| Hambrook Garden Maintenance Services Limited | Administrative & support | 1998 |
| Hambrook Garden Power Limited | Agriculture & fishing | 1983 |
| Hambrook Garden Supplies Limited | Professional & scientific | 2000 |
| Hambrook Holdings Limited | Financial services | 2025 |
| Hambrook Landscapes Limited | Administrative & support | 1990 |
| Hambrook Limited | Hospitality | 1996 |
| Hambrook Support Services Limited | Professional & scientific | 2006 |
| Hamdon Gate Developments Ltd | Construction | 2016 |
| Hamdon Gate Ltd | Real estate | 2008 |
| Hamdown Limited | Professional & scientific | 2015 |
| Hamed Azim Ltd | Wholesale & retail | 2025 |
| Hamedine Business Ltd | Wholesale & retail | 2018 |
| Hamidi AFG Ltd | Wholesale & retail | 2025 |
| Hamill Davies Limited | Professional & scientific | 2002 |
| Hamilton Business Limited | Financial services | 2019 |
| Hamilton Court Management (Southampton) Limited | Households | 1996 |
| Hamilton Grey Ltd | Real estate | 2025 |
| Hamilton James Group LLP | | 2026 |
| Hamilton Marine Engineering Ltd | Professional & scientific | 2020 |
| Hamilton Material Movements Ltd | Transport & logistics | 2024 |
| Hamilton Properties (Southern) Limited | Construction | 2019 |
| Hamilton Red Ltd | Real estate | 2022 |
| Hamilton Ventures Ltd | Manufacturing | 2024 |
| Hamilton's Property Management Ltd | Households | 2024 |
| Hamish Dewar Conservation & Restoration Limited | Other services | 1999 |
| Hamish Dewar Conservation Limited | Extraterritorial | 1999 |
| Hamish Dewar Limited | Other services | 1999 |
| Hammer Down Projects Limited | Construction | 2026 |
| Hammonds Green 1960 Limited | Extraterritorial | 2014 |
| Hamps Limited | Wholesale & retail | 2024 |
| Hamps Plumbing & Heating Limited | Construction | 2023 |
| Hampshire & IOW Speak Their Name CIC | Health & social care | 2026 |
| Hampshire 4X4 Ltd | Wholesale & retail | 2021 |
| Hampshire Anaesthetic Services Limited | Administrative & support | 2010 |
| Hampshire and Isle of Wight Air Ambulance | Health & social care | 2004 |
| Hampshire Apartments Limited | Real estate | 1999 |
| Hampshire BIN Cleaning Ltd | Administrative & support | 2018 |
| Hampshire Building Contractors Limited | Construction | 2021 |
| Hampshire Buildings Preservation Trust Limited(The) | Arts & recreation | 1975 |
| Hampshire Business Solutions Limited | Professional & scientific | 1998 |
| Hampshire Car Sales Limited | Wholesale & retail | 2013 |
| Hampshire Car Trader Limited | Wholesale & retail | 2023 |
| Hampshire Care Limited | Health & social care | 2016 |
| Hampshire Carer & Nursing Agency Ltd | Health & social care | 2017 |
| Hampshire Carnivorous Plants Limited | Wholesale & retail | 2022 |
| Hampshire Cars Ltd | Transport & logistics | 2022 |
| Hampshire Chinese Association | Other services | 2024 |
| Hampshire Chiropractic and Sports Massage Clinic Limited | Health & social care | 2025 |
| Hampshire Cliftons Ltd | Real estate | 2025 |
| Hampshire Compressor Services Limited | Professional & scientific | 2023 |
| Hampshire Construction Services Ltd | Construction | 2019 |
| Hampshire County Cars Limited | Transport & logistics | 2025 |
| Hampshire Cricket Board Limited | Education | 2010 |
| Hampshire Cricket Company Limited | Arts & recreation | 2018 |
| Hampshire Cricket Foundation | Education | 2012 |
| Hampshire Cricket Heritage Ltd | Arts & recreation | 2018 |
| Hampshire Cricket Nominees Limited | Arts & recreation | 2001 |
| Hampshire Dentists Ltd | Health & social care | 2010 |
| Hampshire Design Solutions Limited | Professional & scientific | 2021 |
| Hampshire Direct Cremations Limited | Other services | 2024 |