| Gizmos and Gadgets Ltd | Extraterritorial | 2015 |
| GJH IT Infrastructure Ltd | Professional & scientific | 2024 |
| Glebe Business Management Services Limited | Professional & scientific | 2010 |
| Glebe Farm Contractors Ltd | Other services | 2015 |
| Glenfield Motors Leicester Ltd | Other services | 2016 |
| Global Print Finishers Limited | Manufacturing | 1999 |
| Global Risk Audit Ltd | Information & communication | 2009 |
| Global Sales Compliance Limited | Other services | 2010 |
| Gloriette Spirits & Botanicals Ltd | Manufacturing | 2024 |
| Glosantino Ltd | Real estate | 2020 |
| Glowtox Aesthetics Ltd | Other services | 2024 |
| GO2CONSTRUCTION Limited | Construction | 2015 |
| Goddard Urology Ltd | Health & social care | 2016 |
| Gogartys Gardening Services Limited | Other services | 2016 |
| Good Taste Foods Limited | Wholesale & retail | 1999 |
| Goodwin by Design Limited | Professional & scientific | 2010 |
| Goodyear Project Resource Ltd | Professional & scientific | 2026 |
| Gorilla Spirits Company Limited | Hospitality | 2018 |
| GOT Food Ltd | Hospitality | 2020 |
| Graariel Ltd | Wholesale & retail | 2017 |
| Graft Ventures Limited | Manufacturing | 2020 |
| Grange Associates (UK) Ltd | Professional & scientific | 2013 |
| Grange Cottage Consulting Limited | Professional & scientific | 2014 |
| Grange Farm Eggs (Leics) Limited | Wholesale & retail | 2015 |
| Gransha Financial Services Limited | Financial services | 2002 |
| Grayway Engineering Ltd | Professional & scientific | 2016 |
| Great Gifts Limited | Wholesale & retail | 2007 |
| Green Mobility Group Limited | Transport & logistics | 2020 |
| Green Tree Gardens Limited | Administrative & support | 2020 |
| Greenair Finishing Plant Ltd | Other services | 2015 |
| Greenfenn Ltd | Agriculture & fishing | 2023 |
| Greenfinch Properties Limited | Real estate | 2021 |
| Greenhouse Pubs Limited | Hospitality | 2010 |
| Greenland Investment Partners Limited | Real estate | 2021 |
| Gregory Management Services Limited | Professional & scientific | 2008 |
| Greyfriars Property Group Ltd | Real estate | 2021 |
| Greyhive Ltd | Professional & scientific | 2023 |
| Griid Official Limited | Wholesale & retail | 2025 |
| Grove Industries (Holdings) Ltd | Professional & scientific | 2017 |
| Grove Industries Limited | Real estate | 1999 |
| Grove Property Investments LLP | | 2006 |
| Grubby Paws Ltd | Wholesale & retail | 2011 |
| GS Accessories Ltd | Wholesale & retail | 2024 |
| GS Pearson Building Services Ltd | Construction | 2018 |
| Guest Safety Officer Lobby Group C.I.C. | Other services | 2022 |
| Guttridge Plant Limited | | 1973 |
| Gynaecology Expert Witness Limited | Health & social care | 2021 |
| Gynemed Ltd | Health & social care | 2022 |
| H K Blackaby Ltd | Health & social care | 2020 |
| H.E.D. International Limited | Wholesale & retail | 2016 |
| H.I.T Leadership Ltd | Administrative & support | 2022 |
| H.W. Coates (Holdings) Limited | Extraterritorial | 2009 |
| H.W. Coates Limited | Transport & logistics | 1981 |
| H3 Contracts Ltd | Construction | 2010 |
| H@S Property Limited | Financial services | 2023 |
| Hadley Graham Ltd | Professional & scientific | 2008 |
| Hadraj Limited | Agriculture & fishing | 2020 |
| Hagley Management Services Limited | Other services | 2009 |
| Halcyon Computer Supplies Limited | Administrative & support | 2012 |
| Halcyon Country Properties Limited | Construction | 1982 |
| Halcyon Provident (Commercial) Limited | Real estate | 2020 |
| Haldarbari Ltd | Real estate | 2017 |
| Hall & Davies Medical Limited | Other services | 2014 |
| Halliday Medical Limited | Health & social care | 2026 |
| Hannaford Project Services Limited | Professional & scientific | 2009 |
| Hardings Management Services Limited | Real estate | 2021 |
| Hardwick Corporate Services Ltd | Professional & scientific | 2010 |
| Haresfoot Holdings Ltd | Real estate | 2026 |
| Harrison Floors Ltd | Construction | 2024 |
| Hausmann German Heating Ltd | Construction | 2017 |
| Havdale Limited | Real estate | 1975 |
| Hawksley Rise Management Limited | Households | 2023 |
| Hayden Timber Limited | | 1981 |
| Hayter Bone Limited | Real estate | 2006 |
| HD K9 Ltd | Administrative & support | 2019 |
| HD Physiotherapy Ltd | Other services | 2012 |
| Hdpas Ltd | Real estate | 2022 |
| Headboards by Design Online Limited | Manufacturing | 2016 |
| Healing Leaves Ltd | Wholesale & retail | 2026 |
| Health Marketing Ltd | Administrative & support | 2012 |
| Healthcare Anywhere Ltd | Information & communication | 2019 |
| Healthcare SEO Ltd | Professional & scientific | 2016 |
| Healthilife Limited | Extraterritorial | 2004 |
| Heartsight Medical Ltd | Health & social care | 2025 |
| Heath Jets Ltd | Manufacturing | 2022 |
| Heath Property Group Ltd | Households | 2025 |
| Heavy Fall Limited | Information & communication | 2013 |
| Heighton Bookkeeping Ltd | Professional & scientific | 2020 |
| Hekima Healthcare Limited | Health & social care | 2026 |
| Hekima Property Limited | Real estate | 2020 |
| Helen Astill Ltd | Administrative & support | 2013 |
| Hemosciences Ltd | Administrative & support | 2020 |
| Hensall Quarry Limited | Mining & quarrying | 2021 |
| Henson Recruitment Limited | Administrative & support | 2015 |
| Heritage Green Developments Ltd | Financial services | 2025 |
| Heroes Management Company Limited | Households | 2024 |
| HGB Installations Ltd. | Construction | 2022 |
| HGV Drivers UK & Europe Limited | Transport & logistics | 2018 |
| Hian Technologies Ltd | Professional & scientific | 2021 |
| Hichrom Limited | Extraterritorial | 1984 |