| GC Consulting Services Limited | Professional & scientific | 1992 |
| Gemelli Solutions Ltd. | Administrative & support | 2007 |
| Gemma Adams Limited | Other services | 2023 |
| Generations Back Ltd | Construction | 2011 |
| Geord Engineering Ltd | Wholesale & retail | 2020 |
| George Dutton Limited | Real estate | 1977 |
| George Dutton Trading Limited | Construction | 2013 |
| GES Solutions Ltd | Professional & scientific | 2004 |
| GG Projects Limited | Hospitality | 2023 |
| Ghost X Ltd | Professional & scientific | 2025 |
| Gifford Group Ltd | Construction | 2023 |
| Gifford Plumbing Solutions Limited | Construction | 2021 |
| Gilhornes Limited | Wholesale & retail | 2018 |
| Gilmans Limited | Agriculture & fishing | 2009 |
| Gipsy Major Ltd | Manufacturing | 2025 |
| Glossop Training Limited | Education | 2019 |
| Glover Properties Ltd | Real estate | 2024 |
| Glover's Coaches Limited | Transport & logistics | 1984 |
| Godfrey Lettings Limited | Real estate | 2020 |
| Godfrey's Group Ltd | Real estate | 2019 |
| Golconda Energy Limited | Energy | 2010 |
| Golden Hill (Ashbourne) Limited | Hospitality | 2018 |
| Golden Hour Tanning Ltd | Wholesale & retail | 2024 |
| Golden Nomadics Ltd | Professional & scientific | 2021 |
| Goldstraw Interiors Limited | Manufacturing | 2002 |
| Good 2 GIG Limited | Other services | 2015 |
| Good Station Investments Limited | Real estate | 2018 |
| Goodes (UK) Ltd | Manufacturing | 2013 |
| Gorilla Group Ltd | Wholesale & retail | 2025 |
| Goth Energy Management Limited | Professional & scientific | 2003 |
| GPS Inspections Limited | Mining & quarrying | 2018 |
| Graham English Consultancy Limited | Professional & scientific | 2005 |
| Grange Holiday Lets Limited | Hospitality | 2018 |
| Grass Monkeys Limited | Manufacturing | 2016 |
| Green Access Solutions Ltd | Construction | 2026 |
| Green Colombo Ltd | Professional & scientific | 2019 |
| Green Knight Sustainability Consulting Limited | Professional & scientific | 2017 |
| Greenbase Sustainable Solutions Limited | Water & waste | 2013 |
| Greener Skills Ltd | Construction | 2026 |
| Greenman Investments LLP | | 2014 |
| Greens Consultancy Ltd | Professional & scientific | 2014 |
| Greens Landscaping and Groundworks Ltd | Administrative & support | 2015 |
| Grey FOX Gifts Ltd | Extraterritorial | 2024 |
| Griffin Performance Exhausts Limited | Wholesale & retail | 2016 |
| Growing Rural Enterprise Limited | Professional & scientific | 2009 |
| GS and L Wheeldon Limited | Agriculture & fishing | 2008 |
| GSE Media Limited | Professional & scientific | 2011 |
| GT Residual Limited | Manufacturing | 1985 |
| Guard Associates Limited | Professional & scientific | 2006 |
| GUITARS4YOU Limited | Wholesale & retail | 2004 |
| Gunn 365 Limited | Professional & scientific | 2022 |
| Gwaenynog Farms Limited | Agriculture & fishing | 2011 |
| H LEE and SON Limited | Manufacturing | 2018 |
| Hafod Elwy Ltd | Financial services | 2025 |
| Hair by Kristian Wood Limited | Other services | 2015 |
| Hale Environmental Consulting Limited | Professional & scientific | 2015 |
| Hales Enterprises Limited | Extraterritorial | 2012 |
| Hallfields Limited | Professional & scientific | 2025 |
| Handmade Design Ltd | Wholesale & retail | 2023 |
| Hands on Mansfield Limited | Real estate | 2006 |
| Handsworth Crescent Ltd | Real estate | 2020 |
| Harbor Limited | Professional & scientific | 1985 |
| Hardwick Square Developments Limited | Construction | 2024 |
| Hardwick Square Management Company Ltd | Professional & scientific | 2016 |
| Harehill Farms Limited | Agriculture & fishing | 2009 |
| Haren Property Limited | Real estate | 2025 |
| Harlequin Nutrition Limited | Manufacturing | 2002 |
| Harrison Auto Electrical Limited | Manufacturing | 2006 |
| Haus 4U Ltd | Real estate | 2021 |
| Hawkstone Holdings Ltd | Professional & scientific | 2015 |
| Hayslope Garage Limited | Wholesale & retail | 2011 |
| Hazel Rise Limited | Construction | 2006 |
| Hazer Ltd | Wholesale & retail | 2021 |
| HBA Photography Limited | Professional & scientific | 2011 |
| HCH Limited | Extraterritorial | 1996 |
| Heads UP Hair LAB Ltd | Manufacturing | 2025 |
| Health Coaching Academy Limited | Professional & scientific | 2019 |
| Health Safety and Risk Management Solutions Ltd | Professional & scientific | 2022 |
| Heartfelt Connections CIC | Education | 2023 |
| Height for Hire Ireland - UK Branch | | 2015 |
| Helen Platt Ltd | Administrative & support | 2006 |
| Help International | Health & social care | 1987 |
| Heman Limited | Energy | 2015 |
| Henmore Building and Maintenance Ltd | Construction | 2017 |
| Henmore Developments Limited | Construction | 2023 |
| Henmore Group Limited | Real estate | 2019 |
| Henmore Health Limited | Health & social care | 2016 |
| Henmore Health Primary Care Limited | Health & social care | 2019 |
| Henmore Management Limited | Real estate | 2020 |
| Henmore Property Ltd | Real estate | 2016 |
| Henmores Lifestyle Ltd | Wholesale & retail | 2016 |
| Heritage & Homes Limited | Hospitality | 2015 |
| Heritage Wood Limited | Agriculture & fishing | 2013 |
| Hgoc Economics Ltd | Professional & scientific | 2022 |
| Hidden Identities Ltd | Extraterritorial | 2022 |
| High Adrenaline Sports Limited | Wholesale & retail | 2018 |
| Highwood Consulting Ltd | Information & communication | 2025 |
| Hill & Webster Limited | Professional & scientific | 1985 |
| Hillhead Consulting Limited | Other services | 2021 |
| Hilltop Sales Limited | Wholesale & retail | 2022 |