| Gravity Trading Ltd | Wholesale & retail | 2011 |
| Gray Opticians Limited | Health & social care | 2009 |
| Grays Orchard Ltd | Households | 2006 |
| Great Central Despatch Limited | Transport & logistics | 1997 |
| Great RAY Ltd | Hospitality | 2022 |
| Great Red Property Limited | Real estate | 2019 |
| Great Thoughts Inspire Ltd | Professional & scientific | 2020 |
| Greater Things (Rugby) | Education | 2013 |
| Greatkapfidze Healthcare Ltd | Health & social care | 2013 |
| Greek Zante Rugby Ltd | Hospitality | 2022 |
| Greek Zante Street Daventry Ltd | Hospitality | 2021 |
| Green Bay Consulting Limited | Information & communication | 2014 |
| Green Door Valuation Consulting Ltd | Administrative & support | 2017 |
| Green EYE Technologies Ltd | Wholesale & retail | 2021 |
| Green Frog Holidays Limited | Health & social care | 2019 |
| Green Property Development Services Limited | Construction | 2018 |
| Green Tyger Design Limited | Construction | 2014 |
| Green Webb Consulting Engineers Ltd | Professional & scientific | 2021 |
| Greenbrook Manufacturing Company Ltd | Administrative & support | 2015 |
| Greengate Decorators Limited | Construction | 2004 |
| Greenhaven Woodland Burial Ground Limited | Other services | 1994 |
| Greenhill Solutions Limited | Information & communication | 2002 |
| Greenwood Glamping and Fisheries Ltd | Agriculture & fishing | 2022 |
| Greenyee Ltd | Wholesale & retail | 2022 |
| Gregory Estates Ltd | Real estate | 2016 |
| Grey Gables Dental Limited | Health & social care | 2016 |
| Grey Garn Limited | Information & communication | 2025 |
| Greyhoundxp Ltd | Information & communication | 2025 |
| Greys FM Limited | Administrative & support | 1990 |
| Greysea Investments Limited | Real estate | 2025 |
| Greystone Commerce Limited | Wholesale & retail | 2010 |
| GRH Comms Limited | Wholesale & retail | 2020 |
| Grid Performance Ltd | Arts & recreation | 2026 |
| Grigore Bivol Ltd | Transport & logistics | 2019 |
| Grimaldi Trading Ltd | Wholesale & retail | 2023 |
| GRM Dhillon Holdings Ltd | Construction | 2023 |
| GRM Property Limited | Real estate | 2015 |
| Ground UP Safety Limited | Administrative & support | 2021 |
| Groundrents-Uk Limited | Real estate | 2002 |
| Group Trans Ltd | Transport & logistics | 2015 |
| Groupadmin Services Limited | Extraterritorial | 2013 |
| Growhub Ltd | Financial services | 2018 |
| GRX Transport Ltd | Transport & logistics | 2015 |
| Grzegorzuk Logistics Ltd | Transport & logistics | 2020 |
| GS Toastmaster Ltd | Hospitality | 2020 |
| Gsix Investments Limited | Real estate | 2004 |
| Gsix Limited | Professional & scientific | 2009 |
| GT & Sons Ltd | Real estate | 2023 |
| GT Logistix Ltd | Transport & logistics | 2018 |
| GT Logistix Storage and Distribution Limited | Transport & logistics | 2023 |
| GTM Trans Ltd | Transport & logistics | 2019 |
| Gtms Environmental Services Ltd | Agriculture & fishing | 2020 |
| GTT FIX Ltd | Other services | 2018 |
| Guardian Gamers Ltd | Transport & logistics | 2020 |
| Gugnos Trans Ltd | Transport & logistics | 2014 |
| Guild House Estate Agents Ltd | Real estate | 2018 |
| Gulak Sussex Limited | Extraterritorial | 2024 |
| Gulliver Investment Group Ltd | Real estate | 2025 |
| Gulmohar Estates Limited | Real estate | 2024 |
| Guru Deva Datta Ltd | Information & communication | 2025 |
| Guru Property Ltd | Real estate | 2025 |
| Guru Stores Limited | Wholesale & retail | 2020 |
| Gurufoodsrugby Ltd | Hospitality | 2026 |
| Gurus Food Limited | Hospitality | 2021 |
| Guys Cliffe Properties Ltd | Real estate | 2020 |
| Gysot Limited | Other services | 2016 |
| Gyugliscet Ltd | Transport & logistics | 2020 |
| H & H Freestyle (UK) Ltd | Construction | 2018 |
| H & K Distribution Limited | Manufacturing | 2006 |
| H & K Rugby Ltd | Wholesale & retail | 2021 |
| H & S Commercials Ltd | Wholesale & retail | 2022 |
| H Domanski Ltd | Professional & scientific | 2014 |
| H F Services (Yorkshire) Limited | Construction | 2008 |
| H J Financial Services Limited | Financial services | 2015 |
| H K T (London) Limited | Wholesale & retail | 2021 |
| H Tekbev Limited | Professional & scientific | 2016 |
| H&K Equipment Limited | Manufacturing | 2002 |
| H. Barnieh Ltd | Health & social care | 2019 |
| H.L.P.I. Limited | Professional & scientific | 2005 |
| H.S.C.G. Limited | Professional & scientific | 1990 |
| H.V.Wait Limited | Real estate | 1934 |
| Hadz Holdings Ltd | Health & social care | 2025 |
| Hafele U.K. Limited | Transport & logistics | 1980 |
| Haflan Logistics Limited | Administrative & support | 2017 |
| Hagley Specialist Cars Limited | Wholesale & retail | 2002 |
| Hailstone Funeral Care Limited | Other services | 2025 |
| Hair by Charisma Limited | Other services | 2018 |
| Hair by Honeycomb Limited | Real estate | 2005 |
| Hair Hype Limited | Wholesale & retail | 2019 |
| Halcyon Consultancy Ltd | Professional & scientific | 2024 |
| Haleyjay Limited | Transport & logistics | 2016 |
| Hall V-Tox International Limited | Extraterritorial | 1996 |
| Halland Edinburgh Limited | Professional & scientific | 2015 |
| Halland Glasgow East Limited | Professional & scientific | 2015 |
| Halland Moon Limited | Professional & scientific | 2013 |
| Halo Bridge Pet Cremation Services Ltd | Other services | 2026 |
| Halocline Ltd | Information & communication | 2023 |
| Hammond Automotive Limited | Other services | 2010 |
| Hampstead Park Properties Ltd. | Construction | 1982 |
| Hampton Mills Ltd | Information & communication | 2020 |