| Growthbuddy Limited | Administrative & support | 2022 |
| GS Carpentry and Construction Ltd. | Construction | 2022 |
| Guest Ready Property Ltd | Hospitality | 2026 |
| Guestcapitalco Ltd | Administrative & support | 2025 |
| Guru Driving School Limited | Education | 2019 |
| Haip Healthcare Ltd | Health & social care | 2024 |
| Hammer Down Automobilia Auctions Ltd | Administrative & support | 2022 |
| Hampshire House Residents Association Company Limited | Households | 1974 |
| Hampshire Management Services Limited | Professional & scientific | 1995 |
| Harbon Builders Ltd | Construction | 2016 |
| Hardline Community Wellbeing CIC | Arts & recreation | 2026 |
| Harlington Hair Ltd | Other services | 2023 |
| Harrold & Lloyd Ltd | Professional & scientific | 2025 |
| Hartfield Events Ltd | Arts & recreation | 2025 |
| Haslemere Collaborative (Co-Lab) Community Interest Company | Other services | 2021 |
| Hawkley Moose Limited | Hospitality | 2013 |
| Hayling Cars Ltd | Households | 2017 |
| Hayling Kerames Ltd | Hospitality | 2011 |
| Hazelnut Digital Ltd | Information & communication | 2021 |
| HD Diamond Drilling and Sawing Ltd | Construction | 2021 |
| Headley Fields (Headley) Management Company Limited | Households | 2015 |
| Headley Fine Foods Limited | Hospitality | 2026 |
| Hearken & Hearth Limited | Professional & scientific | 2026 |
| Heartbridge Ltd | Real estate | 2025 |
| Heath END Productions Ltd | Information & communication | 2023 |
| Hedgehog Upholstery Ltd | Other services | 2023 |
| Heeffects Ltd | Information & communication | 2023 |
| Hello Cleaning Limited | Education | 2019 |
| Henderson Protect Ltd | Financial services | 2026 |
| Herbal Bliss Co Ltd | Administrative & support | 2023 |
| Herontye Management Company Limited | Real estate | 1985 |
| Hexagon Broking Services Ltd | Financial services | 2010 |
| Hidden Hide Ltd | Hospitality | 2024 |
| Hifi Hangar Limited | Wholesale & retail | 2015 |
| Highland Properties Limited | Real estate | 1986 |
| Highly Exquisite Observations Limited | Manufacturing | 2025 |
| Hilbert & Gray Limited | Construction | 2011 |
| Himalita Limited | Financial services | 2002 |
| Hofert Consulting Ltd | Professional & scientific | 2020 |
| Hogmoor Distillery Ltd | Wholesale & retail | 2019 |
| Hogmoor Homes Limited | Real estate | 2021 |
| Holland Health and Safety Consultancy Ltd | Construction | 2016 |
| Hollybrook (Bordon) Management Company Limited | Households | 1978 |
| Hollywater Hens LLP | | 2014 |
| Holmcroft & Stone Ltd | Real estate | 2013 |
| Homegrown Soaps 'N' Stuff Ltd | Manufacturing | 2022 |
| Homestead Energy Ltd | Construction | 2023 |
| Honna London Ltd | Wholesale & retail | 2018 |
| Hot Chilli Box Ltd | Administrative & support | 2009 |
| HPI (Hampshire) Limited | Construction | 2025 |
| HR by Laura Ltd | Administrative & support | 2022 |
| Huins Limited | Real estate | 2016 |
| Hunter Maritime Services Ltd | Extraterritorial | 2024 |
| Huritao Ltd | Professional & scientific | 2026 |
| Hurlingham Fine Arts Limited | Arts & recreation | 1985 |
| Hydroactiv Ltd | Wholesale & retail | 2025 |
| I a Mortgages Ltd | Financial services | 2022 |
| I-Promote.Eu Limited | Professional & scientific | 2009 |
| I-Thrive Well-Being Ltd | Professional & scientific | 2024 |
| I.A&C.O Ltd | Construction | 2021 |
| IDO Consulting Limited | Manufacturing | 2008 |
| Igarage Limited | Wholesale & retail | 2018 |
| IJC Transport Consultancy Ltd | Professional & scientific | 2025 |
| Ikon Enterprise Limited | Wholesale & retail | 2007 |
| Ilja Consultancy Limited | Information & communication | 2017 |
| Imagine That Productions CIC | Arts & recreation | 2016 |
| Imbn Ltd | Construction | 2026 |
| Imperia Law Ltd | Professional & scientific | 2024 |
| IN Trade Group Ltd | Wholesale & retail | 2023 |
| Inan's Kebab Van Ltd | Hospitality | 2022 |
| Indecisyve and Co Ltd | Wholesale & retail | 2024 |
| Insightful Video Production Limited | Information & communication | 2023 |
| Inspire Care Management Ltd | Health & social care | 2016 |
| Inspired by Water Ltd | Construction | 2016 |
| Intelligent Equipment Sales Programmes Ltd | Financial services | 2003 |
| Intelligent Promotion Ltd | Professional & scientific | 2014 |
| Into Lighting Limited | Extraterritorial | 2025 |
| Ioan Davies Ltd | Professional & scientific | 2019 |
| IPM Facilities Limited | Real estate | 2001 |
| IRG Painting & Decorating Ltd | Construction | 2024 |
| Iron Hill Construction Ltd | Construction | 2024 |
| ISB & Co. Limited | Hospitality | 2020 |
| Iscotect Ltd | Professional & scientific | 2019 |
| Issaya Group UK Limited | Hospitality | 2023 |
| Itchen Valley Transport Services Ltd | Administrative & support | 2010 |
| J Gatcum Landscaping Limited | Administrative & support | 2019 |
| J&A Enterprise Limited | Wholesale & retail | 2026 |
| J.L.Wellington Ltd | Construction | 2020 |
| Jacaranda Life Limited | Health & social care | 2017 |
| Jackson Roofing Services Ltd | Construction | 2024 |
| JADE4 Building & Design Ltd | Construction | 2019 |
| Jaiken Home Maintenance and Services Ltd | Construction | 2026 |
| Jared Gale Entertainment Limited | Manufacturing | 2013 |
| Jasl Services Ltd | Transport & logistics | 2025 |
| JAY Butcher Photography Limited | Professional & scientific | 2010 |
| Jazzarts Limited | Arts & recreation | 2024 |
| JCS Autos Ltd | Wholesale & retail | 2019 |
| JEM Consultancy (Hampshire) Ltd | Professional & scientific | 2025 |
| Jenkins Construction Ltd | Construction | 2024 |
| JHM Consulting Services Limited | Professional & scientific | 2016 |