| Green Ridge Transport Ltd | Transport & logistics | 2023 |
| Green Rock UK Holdings Limited | Water & waste | 2024 |
| Green Snow Limited | Wholesale & retail | 2016 |
| Greenacres Landscaping Services Limited | Administrative & support | 2023 |
| Greenblue Consulting Ltd | Administrative & support | 2013 |
| Greenbuttercup CIC | Health & social care | 2015 |
| Greenway Environmental Limited | Water & waste | 1947 |
| Gretton Consulting LLP | | 2024 |
| Grey Cat Management Consultancy Ltd | Professional & scientific | 2022 |
| GRG Property Holdings UK Limited | Water & waste | 2019 |
| GRG Waste UK Ltd | Water & waste | 2019 |
| Griffsdistribution Limited | Transport & logistics | 2025 |
| GRM Holdings Limited | Construction | 2016 |
| Gromstar Limited | Wholesale & retail | 2024 |
| Grosvenor Birch Limited | Financial services | 2010 |
| Ground Designs (Southern) Limited | Administrative & support | 2020 |
| Groundshield Limited | Construction | 2002 |
| Group Anaesthetic Services LLP | | 2011 |
| Grove S E & T Ltd | Professional & scientific | 2007 |
| Grove View Apartments RTM Company Ltd | Households | 2025 |
| Grovecroft Properties Limited | Real estate | 2026 |
| Growth Mentality Limited | Professional & scientific | 2022 |
| GS INT Services Limited | Professional & scientific | 2012 |
| GSS Facilities Ltd | Construction | 2013 |
| GSS Flooring Limited | Construction | 2005 |
| GTW Consulting Ltd | Professional & scientific | 2021 |
| Guaranteed Systems Limited | Professional & scientific | 1989 |
| Gut-Face Limited | Health & social care | 2013 |
| GUY Poppy and Associates Consulting Ltd | Professional & scientific | 2020 |
| GWS Cleaning Limited | Other services | 2015 |
| GWS Property Maintenance Limited | Professional & scientific | 2009 |
| H Basra Consulting Ltd | Professional & scientific | 2023 |
| H J FOX Ltd | Health & social care | 2011 |
| H T Orthopaedics Limited | Health & social care | 2018 |
| H.Taylor & Son(Brockley)Limited | Manufacturing | 1957 |
| H2O Guru Limited | Education | 2017 |
| Haime Builders Limited | Construction | 2015 |
| Haime Construction Limited | Construction | 2026 |
| Hallao Ltd | Health & social care | 2022 |
| Halo Family Investments Ltd | Professional & scientific | 2022 |
| Halos Productions Ltd | Information & communication | 2025 |
| Halterworth I.T. Services Limited | Professional & scientific | 2018 |
| Hamble Early Years Centre Ltd | Health & social care | 2017 |
| Hamble Marine Surveys Limited | Professional & scientific | 2017 |
| Hampshire Bearers Limited | Other services | 2014 |
| Hampshire Business Computers Limited | Information & communication | 1986 |
| Hampshire Catering Equipment Hire Limited | Administrative & support | 2024 |
| Hampshire EYE DOC Ltd | Health & social care | 2020 |
| Hampshire Farm Water Services Limited | Professional & scientific | 2000 |
| Hampshire Fencing Services Limited | Construction | 2009 |
| Hampshire Fire and Medical Services Limited | Public administration | 2019 |
| Hampshire Forage Transport Ltd | Agriculture & fishing | 2018 |
| Hampshire Hounds Limited | Other services | 2015 |
| Hampshire Maxillofacial Limited | Health & social care | 2019 |
| Hampshire Mobility Services Limited | Health & social care | 2012 |
| Hampshire Orthotics Ltd | Health & social care | 2011 |
| Hampshire Photobooths Limited | Administrative & support | 2016 |
| Hampshire Premier Construction Ltd | Wholesale & retail | 2019 |
| Hampshire Rewires Limited | Construction | 2022 |
| Hampshire Rigging Services Limited | Construction | 2015 |
| Hampshire Vegan Catering Ltd | Hospitality | 2020 |
| Hampshire Woodburners Limited | Construction | 2020 |
| Hampshirecountyhomesolutions Ltd | Construction | 2023 |
| Hamtun Property Limited | Real estate | 2011 |
| Hamwic Technical Services Ltd | Professional & scientific | 2022 |
| Hanford & SON Ltd | Real estate | 2011 |
| Hanslip Homes Limited | Construction | 2020 |
| Hanson & Associates Limited | Professional & scientific | 2011 |
| Hants Electrical Services (UK) Limited | Construction | 2019 |
| Hants Kickers LLP | | 2014 |
| Hard Surface Composites Limited | Manufacturing | 2014 |
| Harding Motor Services Ltd | Wholesale & retail | 2015 |
| Hardy Products Ltd | Wholesale & retail | 2024 |
| Harliquins Hair & Beauty Ltd | Other services | 2012 |
| Harloes Consulting Ltd | Professional & scientific | 2004 |
| Harmonic Homes Ltd | Real estate | 2021 |
| Harriet Mathias Limited | Wholesale & retail | 2018 |
| Harris Glass and Joinery Ltd | Manufacturing | 2023 |
| Harrison Jones Holdings Ltd | Administrative & support | 2024 |
| Harry Akerman Associates Limited | Health & social care | 2013 |
| Harry Court Management Co Ltd | Households | 2021 |
| Hartley Medical Services Limited | Health & social care | 2018 |
| Hartly Limited | Construction | 2011 |
| Hartswood Management Company (Romsey) Limited | Real estate | 2011 |
| Harvey Creighton Limited | Professional & scientific | 1987 |
| Harvey Orthopaedics Services Limited | Health & social care | 2015 |
| Harvey Rentals Limited | Real estate | 2024 |
| Harwood Brittain Group Limited | Professional & scientific | 2015 |
| Harwood Brittain Technology Limited | Information & communication | 2015 |
| Harwood Brittain Telecom Limited | Information & communication | 2024 |
| Haselhurst Marine Consultants Limited | Professional & scientific | 2013 |
| Hashtag Motion Limited | Professional & scientific | 2020 |
| Haskwood Properties Limited | Real estate | 2008 |
| Hatches Garage Ltd | Wholesale & retail | 2024 |
| Hatchet Inn (L & L) Ltd | Hospitality | 2010 |
| Haus Mortgages Limited | Financial services | 2017 |
| Hayball Building Limited | Construction | 2020 |
| Hayfield House RTM Company Ltd | Households | 2017 |
| Hayward Fencing (Southern) Ltd | Construction | 2022 |
| Hazelwood Holdings 1978 Limited | Financial services | 2018 |