| GCH Construction Ltd | Construction | 2024 |
| GCP Automotive Consultants Limited | Professional & scientific | 2009 |
| Ge-Log Ltd | Professional & scientific | 2007 |
| Geese Energy Limited | Professional & scientific | 2024 |
| Genlex Limited | Administrative & support | 1999 |
| Genuine Progress Ltd | Administrative & support | 2012 |
| GEO Import & Export Limited | Wholesale & retail | 2025 |
| Getmecoffee Ltd | Wholesale & retail | 2024 |
| Giant Vision Limited | Information & communication | 2012 |
| Gibbs Heating Services Ltd | Construction | 2021 |
| Gilly Print Fine Art Ltd | Information & communication | 2004 |
| GIN and Tonic XOD Limited | Real estate | 2017 |
| Ginger Lime Management Ltd | Real estate | 2021 |
| GK Fitness Ltd | Arts & recreation | 2025 |
| Gladestock Studios Ltd | Information & communication | 2014 |
| Glass Design Centre Limited | Arts & recreation | 1997 |
| Gleambar Limited | Other services | 1997 |
| Globebase Computers Limited | Information & communication | 1988 |
| Globus HR Consulting Limited | Professional & scientific | 2012 |
| Glover and Hobbs Ltd | Health & social care | 2016 |
| Go New Forest CIC | Other services | 2017 |
| Goodwin Solutions Limited | Professional & scientific | 2003 |
| Gordon Love Limited | Real estate | 1978 |
| Gosden & Co Limited | Professional & scientific | 2008 |
| Goshawk Evolution Limited | Wholesale & retail | 2019 |
| Goshawk Ltd | Professional & scientific | 2023 |
| Grace Diamonds Ltd | Wholesale & retail | 2015 |
| Graham Davies Project Management Limited | Professional & scientific | 2011 |
| Grangeside Avenue (Hull) Management Limited | Households | 2009 |
| Grayle Jones Construction Limited | Construction | 1995 |
| Green Goose Property Ltd | Real estate | 2026 |
| Green Logic Systems Limited | Information & communication | 2012 |
| Greenclose Holdings Limited | Hospitality | 2012 |
| Greenclose Hotels One Limited | Extraterritorial | 2013 |
| Greenclose Hotels Two Limited | Hospitality | 1959 |
| Greenskye Products Limited | Professional & scientific | 2013 |
| Greenskye Solutions Ltd | Professional & scientific | 2010 |
| Grehom Ltd. | Wholesale & retail | 2006 |
| Grey Sparrow Ltd | Real estate | 2025 |
| Greystones Corporate Services Limited | Professional & scientific | 2017 |
| Grove Place (Maintenance) Limited | Real estate | 1970 |
| GRS Roofing Ltd | Construction | 2017 |
| GS Marine Solutions Limited | Manufacturing | 2016 |
| Guard Force Services Ltd | Agriculture & fishing | 2021 |
| Guard Force Training Ltd | Education | 2023 |
| Guitargo Ltd | Education | 2018 |
| GUN Runner Ltd | Wholesale & retail | 2019 |
| H & I Catering Ltd | Hospitality | 2022 |
| H & L Decorating Limited | Construction | 2019 |
| H & W Creative Limited | Professional & scientific | 2021 |
| H Buckland Associates Limited | Professional & scientific | 2016 |
| H. B. Carpentry & General Maintenance Limited | Construction | 2024 |
| H.Goodall & SON (Farmers) Limited | Agriculture & fishing | 1957 |
| H4D Ltd | Other services | 2018 |
| Halle Search Ltd | Administrative & support | 2025 |
| Hallett Independent Limited | Financial services | 2002 |
| Hallmark Securities Ltd | Construction | 2018 |
| Halso Southampton Ltd | Hospitality | 2024 |
| Hamilton Scott Estates Limited | Real estate | 1999 |
| Hampshire Hathaway Ltd | Professional & scientific | 2007 |
| Hampshire Websites Ltd. | Information & communication | 2008 |
| Hampton Lane 137 Limited | Real estate | 2023 |
| Hannah Happel Design Ltd | Professional & scientific | 2026 |
| Hants Car Finder Ltd | Wholesale & retail | 2024 |
| Happy Homes Cleaning Solutions Ltd | Administrative & support | 2024 |
| Happy Mobiles Limited | Wholesale & retail | 2024 |
| Happy Times Takeaway Limited | Hospitality | 2011 |
| Happy Vapes Ltd | Wholesale & retail | 2025 |
| Harba Construction Ltd | Construction | 2024 |
| Harbour & House Ltd | Construction | 2026 |
| Harbour Systems Limited | Information & communication | 2003 |
| Harbourwood Homes (Hordle Farm) Ltd | Real estate | 2024 |
| Harbourwood Homes Ltd | Construction | 2015 |
| Harbourwood Property Group (NO. 1) Ltd | Construction | 2023 |
| Harbourwood Property Group (NO. 2) Ltd | Construction | 2023 |
| Harbourwood Property Group Ltd | Real estate | 2021 |
| Hardwick Building Services Limited | Construction | 2017 |
| Harewood Green Residents Limited | Hospitality | 1969 |
| Harken UK Limited | Wholesale & retail | 1975 |
| Harris Jackson Limited | Professional & scientific | 2016 |
| Harveys Storage Ltd | Transport & logistics | 2021 |
| Hassan-Hicks Opticians Ltd | Wholesale & retail | 2018 |
| Hatherley's Hair and Beauty Ltd | Other services | 2022 |
| Haven Restaurant (Lymington) Ltd | Hospitality | 2017 |
| Havenhurst Limited | Wholesale & retail | 2002 |
| Havenhurst Properties Limited | Real estate | 2019 |
| Hawksworth Garden Services Limited | Administrative & support | 1983 |
| HCM Farm Holdings LLP | | 2018 |
| Health Quiropractico Ltd | Extraterritorial | 2016 |
| Healthcare Landscape Solutions Ltd | Professional & scientific | 2010 |
| Healthierliving UK Ltd | Administrative & support | 2006 |
| Hear Life Limited | Health & social care | 2009 |
| Hearing Star Limited | Health & social care | 2009 |
| Heartless SZN Ltd | Wholesale & retail | 2024 |
| Heat Seekers Solutions LLP | | 2025 |
| Heather Marten Limited | Manufacturing | 2017 |
| Heathlands (Hordle) Limited | Households | 2015 |
| Helioscentric Limited | Administrative & support | 2006 |
| Hello Outdoors Lymington CIC | Education | 2025 |
| Hel`S Kitchen Limited | Hospitality | 2009 |