| Greenwich International College Limited | Education | 2017 |
| Gregseal Technology UK Ltd | Professional & scientific | 2006 |
| Greygan Building Service Ltd | Construction | 2020 |
| Greyline Publishing Limited | Information & communication | 2025 |
| Griffin Precast Limited | Construction | 2023 |
| Grill & Spice Kitchen Ltd | Hospitality | 2026 |
| Groomberry Limited | Real estate | 1978 |
| Group Provisions Limited | Manufacturing | 2023 |
| Grove Group Holdings Limited | Financial services | 2022 |
| GRP Group Ltd | Transport & logistics | 2025 |
| Grrm Limited | Real estate | 2018 |
| GRS Drivers Ltd | Transport & logistics | 2012 |
| Grubby Puppies Limited | Other services | 2024 |
| GS & S Group Ltd | Financial services | 2026 |
| GS Aero Systems Limited | Professional & scientific | 2015 |
| GS Marine Services Limited | Manufacturing | 2016 |
| GSD Technologies Ltd | Manufacturing | 2016 |
| GSF (UK) Limited | Extraterritorial | 2008 |
| GSF GB Limited | Professional & scientific | 2000 |
| GSF Sandylight Limited | Administrative & support | 1987 |
| GSH Group (Electrical) Limited | Construction | 2015 |
| GSH Group (Projects) Limited | Real estate | 2020 |
| GSL Southern Holdings Limited | Financial services | 2013 |
| Gssr Homes Ltd | Real estate | 2026 |
| GUI Qing Limited | Hospitality | 2015 |
| Guild of Hair, Beauty and Wellbeing Professionals Ltd | Other services | 2017 |
| Guillemot Place Residents Limited | Real estate | 2020 |
| Gurdens Ltd | Wholesale & retail | 2024 |
| Guttaclean Ltd | Construction | 1994 |
| Gwhizz Electrical Ltd | Construction | 2020 |
| GWR Refinished Ltd. | Construction | 2017 |
| GWS Motorsport Limited | Arts & recreation | 2012 |
| GX Technology Eame Limited | Information & communication | 1996 |
| H & E Ltd | Professional & scientific | 2014 |
| H & H Developers Limited | Real estate | 2010 |
| H & K Phillips Limited | Health & social care | 2021 |
| H & P Management Services Ltd | Real estate | 2003 |
| H & S Enterprise (Woolston) Limited | Hospitality | 2015 |
| H a E E Limited | Wholesale & retail | 2009 |
| H a Utilities Ltd | Construction | 2026 |
| H Allam Consultants Ltd | Professional & scientific | 2024 |
| H and R Computers Ltd | Manufacturing | 2021 |
| H Dosanjh Transport Ltd | Transport & logistics | 2023 |
| H Hamson & Co Ltd | Administrative & support | 2025 |
| H J T (Winchester) Limited | Extraterritorial | 2006 |
| H Smarthouse Ltd | Real estate | 2026 |
| H&H Petroleum Ltd | Wholesale & retail | 2023 |
| H&R Soton Limited | Hospitality | 2023 |
| H&R Travel and Transport Limited | Transport & logistics | 2024 |
| H&W Surveying Limited | Professional & scientific | 2014 |
| H-W Tree Surgeons Ltd | Agriculture & fishing | 2015 |
| H. Reynaud ET Fils (UK) Limited | Transport & logistics | 1983 |
| H.J.Holt,Limited | Real estate | 1920 |
| H2O Plumbing & Heating 1984 Limited | Construction | 2012 |
| H2O Professional Services Ltd | Wholesale & retail | 2003 |
| Haarp Homes Limited | Real estate | 2024 |
| Hack Craft Play Limited | Professional & scientific | 2022 |
| Haider Investments Limited | Real estate | 2021 |
| Haig Engineering Limited | Manufacturing | 2005 |
| Haines Construction Limited | Agriculture & fishing | 1998 |
| Haircut 100 Limited | Other services | 1992 |
| Hairxtensions.Co.Uk Direct Ltd | Wholesale & retail | 2010 |
| Hallhaus Ltd | Manufacturing | 2025 |
| Hallmark Facilities Management Ltd | Administrative & support | 2023 |
| Hallmark Property Services Ltd | Construction | 2009 |
| Hamble Ceramics Ltd | Construction | 2005 |
| Hamble River Holdings Limited | Financial services | 1999 |
| Hamble River Raid Limited | Professional & scientific | 2004 |
| Hamilton Parker Foundation | Education | 2016 |
| Hamm Enterprises Ltd | Information & communication | 2020 |
| Hammersley Investments Ltd | Extraterritorial | 2013 |
| Hampshire Association for the Care of the Blind | Health & social care | 1996 |
| Hampshire Association of Local Councils Limited | Other services | 2009 |
| Hampshire Badminton Association Limited | Arts & recreation | 2001 |
| Hampshire Builders Ltd | Construction | 2021 |
| Hampshire Cakecraft Limited | Wholesale & retail | 2018 |
| Hampshire Campervans Ltd | Wholesale & retail | 2024 |
| Hampshire Care Association | Other services | 2017 |
| Hampshire Carp Hatcheries LLP | | 2020 |
| Hampshire Carpet Solutions Ltd | Administrative & support | 2025 |
| Hampshire Character Boats Limited | Manufacturing | 2025 |
| Hampshire Christian Education Trust | Education | 2004 |
| Hampshire Environmental Services Ltd | Construction | 2006 |
| Hampshire Event Props Ltd | Administrative & support | 2020 |
| Hampshire EYE Care Ltd | Health & social care | 2020 |
| Hampshire Field Fencing Ltd | Construction | 2020 |
| Hampshire Freight Services Ltd. | Transport & logistics | 1996 |
| Hampshire Garage Equipment Ltd | Manufacturing | 2011 |
| Hampshire Garden Machinery Limited | Wholesale & retail | 1990 |
| Hampshire Handyman Services Ltd | Other services | 2019 |
| Hampshire Health & Education Enterprises Limited | Health & social care | 2015 |
| Hampshire Healthcare Partners Limited | Health & social care | 2025 |
| Hampshire Healthcare Partnership Holding Company Limited | Financial services | 2025 |
| Hampshire Heartwood Limited | Administrative & support | 2023 |
| Hampshire House Clearances Limited | Water & waste | 2013 |
| Hampshire Made Ceramics Limited | Manufacturing | 2023 |
| Hampshire Outdoor Living Ltd | Wholesale & retail | 2026 |
| Hampshire Property Partners Ltd | Real estate | 2012 |
| Hampshire Real Homes Ltd | Real estate | 2023 |
| Hampshire Resin Driveways Limited | Construction | 2025 |