| Gleo Sauna Ltd | Other services | 2025 |
| Global (Marine & Industrial) Flooring Solutions Ltd | Construction | 2016 |
| Global Academic Gateways Ltd | Education | 2024 |
| Global Insulation (European) Limited | Construction | 2002 |
| Gmps Consultants Limited | Professional & scientific | 2024 |
| Golf-Med Limited | Administrative & support | 2007 |
| Goodstead Solutions LLP | | 2025 |
| Gooroo Baking Limited | Wholesale & retail | 2015 |
| Grate Interiors Limited | Wholesale & retail | 2010 |
| GRB Groundworks Ltd | Construction | 2017 |
| Green GAS and Plumbing Ltd | Construction | 2026 |
| GSS Scaffolding LLP | | 2018 |
| GT & Monks Ltd | Administrative & support | 2014 |
| Guildford Dog Training Limited | Agriculture & fishing | 2019 |
| Guttercare UK Limited | Construction | 2006 |
| GVE Protect Ltd | Transport & logistics | 2019 |
| H.V.R Vehicle Sales Ltd | Wholesale & retail | 2019 |
| Hamilton Lunn Limited | Extraterritorial | 2014 |
| Hamilton Lunn Management Services Limited | Real estate | 1988 |
| Hampshire Food & Beverage Ltd | Hospitality | 2024 |
| Hampshire Land Surveys Limited | Administrative & support | 2001 |
| Hampshire Tree Services Ltd | Administrative & support | 2026 |
| Happy Hikers Dog Walking Limited | Agriculture & fishing | 2022 |
| Harbord Management Co Ltd | Real estate | 2013 |
| Harbour View Consultants Limited | Professional & scientific | 2022 |
| Harbourside Flowers Ltd | Agriculture & fishing | 2024 |
| Hare Hatch Early Education Limited | Education | 2020 |
| Harman IT Consulting Ltd | Information & communication | 2007 |
| Havant Hockey Limited | Arts & recreation | 2026 |
| Hawk Marine Products Limited | Manufacturing | 2006 |
| Hayden Vehicle Rentals Limited | Administrative & support | 2003 |
| Hayling Automotive Limited | Wholesale & retail | 2018 |
| Hayling Billy Management Limited | Extraterritorial | 1994 |
| Hayling Creatives Ltd | Wholesale & retail | 2021 |
| Hayling Glazing Conservatories Limited | Construction | 2019 |
| Hayling Golf Club (Links) Limited | Arts & recreation | 2025 |
| Hayling Grilled Chicken Limited | Hospitality | 2019 |
| Hayling Hardware Limited | Wholesale & retail | 2015 |
| Hayling Herald Ltd | Manufacturing | 2019 |
| Hayling Indian Restaurant Ltd | Hospitality | 2026 |
| Hayling Industrial (Southern) Limited | Wholesale & retail | 2011 |
| Hayling Island Brewing Limited | Manufacturing | 2023 |
| Hayling Island Camp Site Limited | Hospitality | 2011 |
| Hayling Island Sailing Club Ltd | Arts & recreation | 2025 |
| Hayling Jetsport Performance Ltd | Manufacturing | 2024 |
| Hayling Light Railway Limited | Transport & logistics | 2021 |
| Hayling Marine Services Limited | Transport & logistics | 2014 |
| Hayling Padel Limited | Arts & recreation | 2026 |
| Hayling Park Pavilion Limited | Hospitality | 1994 |
| Hayling Pizza Ltd | Professional & scientific | 2019 |
| Hayling Property & Advisory Services Ltd | Real estate | 2025 |
| Hayling Property Management RTM Company Limited | Households | 2013 |
| Hayling Roofing Ltd | Construction | 2025 |
| Hayling Sea School Limited | Education | 2004 |
| Hayling Top Tier Ltd | Construction | 2025 |
| Hazel Marine Services Ltd | Manufacturing | 2023 |
| Hearwell Microsuction Ltd | Health & social care | 2024 |
| Hebden Design Studio Ltd | Professional & scientific | 2019 |
| Hecuts Ltd | Other services | 2022 |
| Henson Consultants Limited | Professional & scientific | 2003 |
| Heritage & SON Builders Limited | Construction | 2025 |
| Hewson Property Group Limited | Real estate | 2025 |
| Hiads Limited | Information & communication | 1996 |
| Highlight Decorators Limited | Construction | 2001 |
| Hilden Court Flats Management Company Limited | Real estate | 2010 |
| Hinx Built Environment Ltd | Professional & scientific | 2016 |
| HJ Retailer Ltd | Wholesale & retail | 2023 |
| Hockenhauser Ltd | Real estate | 2024 |
| Hogarth Cheswick Limited | Other services | 2012 |
| Honeyman Consultancy Limited | Transport & logistics | 2022 |
| Hoofin Around Equine Transport Limited | Transport & logistics | 2024 |
| Hortulan Gardening Limited | Administrative & support | 2026 |
| House and Home Sitters Ltd | Households | 2014 |
| Housie Property Management Ltd. | Real estate | 2017 |
| Housing Assessment Services Limited | Professional & scientific | 2016 |
| HRK Investment & Management Limited | Real estate | 2019 |
| Hugh Hickman & SON Limited | Real estate | 2014 |
| Hurricane Properties Limited | Real estate | 2006 |
| Hutley Ltd | Wholesale & retail | 2015 |
| Hutley Property Ltd | Real estate | 2020 |
| Hyfly Media Services Ltd | Information & communication | 2016 |
| I C Brickwork Ltd | Construction | 2019 |
| I CAN SEE the Sea Limited | Arts & recreation | 2018 |
| IBM Autos Ltd | Construction | 2021 |
| IDG Growth Solutions Ltd | Professional & scientific | 2018 |
| IGA Ltd | Arts & recreation | 2020 |
| INA Haulage Ltd | Wholesale & retail | 2024 |
| Incite Publishing Limited | Information & communication | 2008 |
| Independent Gymnastics Association Ltd | Education | 2020 |
| Indigo Tide Limited | Information & communication | 2026 |
| Infinity Bar 23 Ltd | Hospitality | 2025 |
| Inhouse Telecom Solutions Ltd | Information & communication | 2010 |
| Inn on the Beach UK Limited | Hospitality | 2024 |
| Innova Accounting Ltd | Professional & scientific | 2014 |
| Inside OUT Oxford Limited | Construction | 2016 |
| Integrate Palmerston Limited | Real estate | 2025 |
| Intelidroid AI Ltd | Information & communication | 2025 |
| Intelligent IT Ltd | Information & communication | 2026 |
| Intelligent Living Group Limited | Information & communication | 2018 |
| Intrepid Safety Solutions Ltd | Professional & scientific | 2023 |