| Greengrove Holdings Limited | Financial services | 2026 |
| Greengrove Property Investments Ltd | Real estate | 2026 |
| Greenk Fine Foods UK Ltd | Hospitality | 2021 |
| Greenstone FHL Limited | Professional & scientific | 2012 |
| Greenway Plant & Labour Ltd | Construction | 2006 |
| Greenway Training Holdings Limited | Real estate | 2025 |
| Greenway Training Limited | Education | 2021 |
| Greenways Grove (NO.1) Management Company Limited | Households | 1991 |
| Greenways Grove (NO.2) Management Company Limited | Households | 1991 |
| GRG Farms Ltd | Agriculture & fishing | 2002 |
| GRH Advisory Services Ltd | Other services | 2022 |
| Griffin Forestry Limited | Agriculture & fishing | 2012 |
| Griffon Flight Ltd | Education | 2018 |
| Grinpace Residents Association Limited | Households | 1985 |
| Ground Evolution Monitoring Ltd | Professional & scientific | 2020 |
| Groundscape Services Limited | Construction | 2007 |
| Groves Park Investments Ltd | Real estate | 2012 |
| Groves Park Limited | Real estate | 2003 |
| Growth Works Limited | Professional & scientific | 2005 |
| GSD Swift Limited | Professional & scientific | 2011 |
| GSW Technology Limited | Administrative & support | 2010 |
| GSW2 Holdings Limited | Financial services | 2024 |
| Gtcyber Limited | Information & communication | 2022 |
| Guesthouse Dining Ltd | Hospitality | 2025 |
| Guidant Measurement Systems UK Limited | Information & communication | 2025 |
| Guidemode Limited | Information & communication | 2025 |
| Guildford Street Capital (UK) Limited | Professional & scientific | 2013 |
| Guildford Street Capital Limited | Financial services | 2017 |
| Gunnislake Limited | Professional & scientific | 2000 |
| GW Performance Coaching Limited | Arts & recreation | 2025 |
| Gwbaxter Ltd | Information & communication | 2026 |
| GWD Wildlife Services Limited | Agriculture & fishing | 2023 |
| H E Arthur Limited | Health & social care | 2011 |
| H H R Consulting Limited | Professional & scientific | 1998 |
| H J Davis Consulting Limited | Professional & scientific | 2013 |
| H MAC Groundworks Ltd | Construction | 2024 |
| H&B Investments Limited | Real estate | 2021 |
| H&B Property Investments Limited | Real estate | 2024 |
| H&E Tyres Ltd | Wholesale & retail | 2025 |
| H.F. Stiles and SON Limited | Wholesale & retail | 1986 |
| H.G.Rent & Co.(Highbury)Limited | Transport & logistics | 1959 |
| H2 GEO Limited | Professional & scientific | 2022 |
| H2NA Limited | Professional & scientific | 2013 |
| H5UNLIMITED Ltd | Professional & scientific | 2023 |
| HA' Penny Press Limited | Manufacturing | 2008 |
| Hair Company EST. 1989 Ltd | Other services | 2014 |
| Hair Finesse Ltd | Education | 2024 |
| Hair Prestige Ltd | Other services | 2026 |
| Halise Ltd | Hospitality | 2022 |
| Hall & Hall Solutions Ltd | Professional & scientific | 2023 |
| Halley Industrial Motors Ltd | Administrative & support | 2025 |
| Halsall Properties Limited | Professional & scientific | 1957 |
| HAM Property & Lettings Ltd | Real estate | 2022 |
| Hamilton Commerce Ltd | Financial services | 2012 |
| Hamilton Concepts Ltd | Other services | 2026 |
| Hammersley Enterprises Limited | Information & communication | 2003 |
| Hampshire Restaurants Ltd | Hospitality | 2013 |
| Hanaf Limited | Information & communication | 2018 |
| Hanaf Properties Limited | Real estate | 2023 |
| Hanbury Davies Limited | Financial services | 1998 |
| Hanbury Holdings Limited | Financial services | 1996 |
| Hand and Millar Management Consulting LLP | | 2015 |
| Handmade Street Food Ltd | Wholesale & retail | 2022 |
| Handrick S Limited | Wholesale & retail | 2019 |
| Hands on PGE Limited | Extraterritorial | 2018 |
| Hangcure Limited | Wholesale & retail | 2022 |
| Happy Feet Childcare Ltd | Education | 2024 |
| Happy Hooves Equine Ltd | Transport & logistics | 2025 |
| Happy Paws Dog Walking and Pet Care Services Ltd | Other services | 2024 |
| Happy Vapes Trading Limited | Wholesale & retail | 2023 |
| Harbourpoint Solutions Ltd | Other services | 2025 |
| Hardenhuish School Limited | Education | 2010 |
| Hardinge House Estate Ltd | Hospitality | 2026 |
| Hardlake Limited | Information & communication | 2019 |
| Hardy Tree and Landscaping Specialists Ltd | Administrative & support | 2025 |
| Hardy Woodland Services Limited | Agriculture & fishing | 2017 |
| Harflett Homes Limited | Real estate | 2022 |
| Harford's 4 X 4 Limited | Wholesale & retail | 1993 |
| Harley Farms (Wilts) Limited | Agriculture & fishing | 2007 |
| Harman Whiteley Ltd | Real estate | 2025 |
| Harpoon Tackle Limited | Wholesale & retail | 2025 |
| Harroways Management (Bracklesham Bay) Limited(The) | Households | 1979 |
| Harry Baird Ltd | Financial services | 2022 |
| Harry Meade Limited | Agriculture & fishing | 2013 |
| Hartham Lettings Ltd | Real estate | 2024 |
| Harthill Investments Ltd | Real estate | 2024 |
| Hartley Farm Shop Limited | Wholesale & retail | 2014 |
| Hartmoor Merchandise Limited | Manufacturing | 2017 |
| Harwick Ltd | Administrative & support | 2024 |
| Hash DOT Ltd | Wholesale & retail | 2024 |
| Hatt Marketing Limited | Professional & scientific | 2020 |
| Hawes Family Investment Co Limited | Financial services | 2025 |
| Hawker Dairy Limited | Agriculture & fishing | 2026 |
| Hawking Farming Limited | Agriculture & fishing | 2015 |
| Hawking Holdings Limited | Financial services | 2015 |
| Hayne Massey Ltd | Administrative & support | 2012 |
| Hayward Training Limited | Education | 2005 |
| Hazeland Hill Management Limited | Hospitality | 2019 |
| Hazell Farming Ltd | Agriculture & fishing | 2022 |
| Hazellstone Property Ltd | Real estate | 2025 |