| Groundtec Pitch Care Ltd | Administrative & support | 2025 |
| Growth Point Consulting Ltd | Professional & scientific | 2025 |
| GS Hampshire Ltd | Hospitality | 2023 |
| GSH Construction Ltd | Manufacturing | 2021 |
| GT Classics Ltd | Wholesale & retail | 1996 |
| Gtec Consultants Limited | Information & communication | 2002 |
| GTR Porsche Specialist Ltd | Wholesale & retail | 2022 |
| Gunt Corp Ltd | Administrative & support | 2024 |
| Gurita Smart Home Ltd | Construction | 2023 |
| Gusturi Romanesti Limited | Wholesale & retail | 2020 |
| H and G Removals Ltd | Transport & logistics | 2025 |
| H Kuhnke Limited | Extraterritorial | 2013 |
| H M Business Solutions Limited | Professional & scientific | 2018 |
| H&Art Developments Ltd | Real estate | 2024 |
| H&B Food Service Ltd | Hospitality | 2024 |
| H.B. Burbidge & SON Limited | Manufacturing | 1945 |
| Hair by Callie Ltd | Other services | 2026 |
| Hallgarten & Company Limited | Financial services | 2015 |
| Halo Heating and Plumbing Ltd | Construction | 2019 |
| Hamilton Pools Limited | Construction | 2021 |
| Hammer Twist Ltd | Wholesale & retail | 2025 |
| Hamplls(Chinnock) Limited | Construction | 2025 |
| Hampshire Broughton Properties Ltd | Households | 2022 |
| Hampshire Candles (Andover) Ltd | Wholesale & retail | 2020 |
| Hampshire Custom Alloys Limited | Wholesale & retail | 2023 |
| Hampshire Diamond Ltd | Transport & logistics | 2014 |
| Hampshire Game Limited | Agriculture & fishing | 1979 |
| Hampshire Hathaway RD Tech Solutions Ltd | Professional & scientific | 2023 |
| Hampshire L&L Limited | Real estate | 2019 |
| Hampshire Plumbing & Heating Services Ltd | Construction | 2016 |
| Hampshire Structures Limited | Extraterritorial | 1993 |
| Hampshire T-Shirt Printing Services Ltd | Wholesale & retail | 2025 |
| Hampshire Truckcare Ltd | Manufacturing | 2024 |
| Hampshire United Youth FC CIC | Arts & recreation | 2025 |
| Hampshirebusinesses Directory Ltd | Information & communication | 2026 |
| Hampshirehomespace Ltd | Construction | 2021 |
| Handisc Holdings Ltd | Other services | 2017 |
| Handisc Limited | Manufacturing | 2010 |
| Handy DAD Ltd | Construction | 2021 |
| Hannington Tame Limited | Administrative & support | 2013 |
| Hannys Social Care Limited | Health & social care | 2021 |
| Happy Cat Content Ltd | Professional & scientific | 2019 |
| Happy Fish Custom Clothing Ltd | Manufacturing | 2009 |
| Happy's Nails Ltd | Other services | 2025 |
| Hapro Ltd | Professional & scientific | 2025 |
| Harewood Consulting Services Limited | Professional & scientific | 2021 |
| Harewood Garage Limited | Wholesale & retail | 2025 |
| Harewood Independent Surveyors Ltd | Professional & scientific | 2019 |
| Hargur Ltd | Health & social care | 2012 |
| Harley Davis and SON Ltd | Wholesale & retail | 2023 |
| Harleystone Developments Ltd | Construction | 2025 |
| Harleystone Holdings Limited | Financial services | 2025 |
| Harnhill Wealth Management Limited | Financial services | 2014 |
| Harold Frederick Associates Ltd | Construction | 2018 |
| Harolds Construction & Landscaping Ltd | Administrative & support | 2020 |
| Harpar Grace International Ltd | Wholesale & retail | 2013 |
| Harrington Blue & Partners Ltd | Information & communication | 2023 |
| Harrington Verve Ltd | Information & communication | 2025 |
| Harroway Technology Limited | Information & communication | 2026 |
| Harry Hickton Racing Limited | Arts & recreation | 2023 |
| Harson Construction Ltd | Other services | 2024 |
| Harson Group Ltd | Other services | 2024 |
| Harson Recruitment Ltd | Administrative & support | 2023 |
| Hart Drives & Landscapes Ltd | Construction | 2012 |
| Hart Driveways & Landscapes Limited | Construction | 2025 |
| Harting Properties Limited | Real estate | 2024 |
| Harvest Bistro & Bakery Ltd | Wholesale & retail | 2025 |
| Harwood Project One Limited | Other services | 2018 |
| Harwood Ventures Ltd | Extraterritorial | 2015 |
| Hause Pro Ltd | Administrative & support | 2025 |
| Hautala Holdings Ltd | Financial services | 2024 |
| Havers & Haldane Limited | Professional & scientific | 2022 |
| Havonar Ltd | Health & social care | 2022 |
| Hawdon Enterprises Ltd | Professional & scientific | 2000 |
| Hawk Conservancy Trust Limited | Arts & recreation | 2001 |
| Hayblue Property Maintenance Ltd | Real estate | 2024 |
| Haydown Limited | Construction | 2011 |
| Haygarth Ross Limited | Construction | 2011 |
| Hazel Apple Ltd | Hospitality | 2022 |
| HB Safety Solutions Ltd | Construction | 2025 |
| HBT Property Development Limited | Real estate | 2017 |
| HCA Coating Limited | Administrative & support | 2002 |
| HCA Consolidations (Hampshire) Limited | Financial services | 2016 |
| HCA Group (Hampshire) Limited | Financial services | 2012 |
| HCA Holdings (Hampshire) Limited | Financial services | 2012 |
| HCA Panels Limited | Administrative & support | 2005 |
| HCI Venture Ltd | Hospitality | 2026 |
| HDV Elwes Limited | Professional & scientific | 2025 |
| Headmark Limited | Professional & scientific | 2003 |
| Healing Touch Care Ltd | Administrative & support | 2018 |
| Health E-Solutions Limited | Other services | 2005 |
| Heathraven Properties Limited | Construction | 2012 |
| Heathrow Elite Parking Ltd | Administrative & support | 2025 |
| Heights Mortgages Limited | Financial services | 2018 |
| Helen Kirkum Studio Limited | Professional & scientific | 2019 |
| Heli-Test Aviation Limited | Professional & scientific | 2017 |
| Helispares Limited | Transport & logistics | 2000 |
| Heliwork (Services) Limited | Manufacturing | 1985 |
| Hellyer's Kitchen Limited | Construction | 2015 |
| Help Others Property Estate (Hope) Ltd | Real estate | 2017 |