| GTJ Hair and Beauty Limited | Other services | 2019 |
| GTM Powered Access Limited | Manufacturing | 2024 |
| GTM Tool Hire Limited | Transport & logistics | 2018 |
| Gtmaritime Limited | Information & communication | 2015 |
| GTO Joinery Limited | Construction | 2014 |
| Gtsf Services Ltd | Information & communication | 2017 |
| Guap UK Ltd | Wholesale & retail | 2015 |
| Guard Protect UK Limited | Administrative & support | 2024 |
| Guardian Pest Management & Environmental Services Limited | Professional & scientific | 2017 |
| Guardian Shelter Ltd | Hospitality | 2024 |
| GUD Spellin Produkshuns Ltd | Professional & scientific | 2013 |
| Guelder Eight Limited | Hospitality | 2024 |
| Guelder Eleven Limited | Hospitality | 2024 |
| Guelder Five Limited | Hospitality | 2023 |
| Guelder Four Limited | Hospitality | 2022 |
| Guelder Nine Limited | Hospitality | 2024 |
| Guelder One Limited | Hospitality | 2021 |
| Guelder Seven Limited | Hospitality | 2024 |
| Guelder SIX Limited | Hospitality | 2022 |
| Guelder TEN Limited | Hospitality | 2024 |
| Guelder Three Limited | Hospitality | 2022 |
| Guelder Two Limited | Hospitality | 2022 |
| Gugata Ltd | Wholesale & retail | 2025 |
| Guild of PRE & Post Natal Exercise Instructors CIC | Education | 2021 |
| Guinan Projects Ltd | Construction | 2026 |
| Gulden Solutions Ltd | Administrative & support | 2024 |
| Gull Marine Ltd | Transport & logistics | 2015 |
| Gully Barbers Warrington Ltd | Other services | 2023 |
| Gunbuster Management Ltd | Professional & scientific | 2014 |
| Gunjerz Limited | Manufacturing | 2026 |
| Gurraj Ltd | Real estate | 2023 |
| GUS & JO Mckay Ltd | Administrative & support | 2025 |
| Gustavo Ltd | Hospitality | 2022 |
| Gusuu Design and Consultancy Ltd | Wholesale & retail | 2020 |
| Guthrie IT Consultancy Ltd | Administrative & support | 2015 |
| Gutsee Health Limited | Professional & scientific | 2024 |
| GV 1 Limited | Professional & scientific | 2022 |
| GV 2 Limited | Professional & scientific | 2022 |
| GW Clearances Ltd | Water & waste | 2022 |
| GW Commercial Catering Services Limited | Manufacturing | 2017 |
| GW Engineering Solutions Ltd | Professional & scientific | 2019 |
| GW Madhatters Limited | Financial services | 2023 |
| GW Marketing Associates Ltd | Administrative & support | 2023 |
| GW Murrant Limited | Manufacturing | 2015 |
| GW Rail Services Limited | Administrative & support | 2015 |
| GW Rail Signalling Ltd | Professional & scientific | 2019 |
| Gwenllian Limited | Administrative & support | 2010 |
| Gxel Ltd | Real estate | 2024 |
| GXS Ventures Limited | Wholesale & retail | 2020 |
| Gyles Inc. Limited | Other services | 2017 |
| Gympin (UK) Ltd | Professional & scientific | 2020 |
| Gyre Designs Limited | Professional & scientific | 2024 |
| GZ Games Limited | Administrative & support | 2025 |
| G’S Coffee Traders Ltd | Wholesale & retail | 2025 |
| H & a Retail Services Ltd | Wholesale & retail | 2021 |
| H & D Parkinson Ltd | Construction | 2018 |
| H & J Brooks Ltd | Real estate | 2025 |
| H & M Distribution Limited | Transport & logistics | 1984 |
| H & S Joinery Limited | Manufacturing | 2002 |
| H Croft Ltd | Real estate | 2026 |
| H EVE Engineering Project Services Ltd | Professional & scientific | 2026 |
| H G Wood Lift Trucks Limited | Administrative & support | 2005 |
| H P B Services Ltd | Construction | 2021 |
| H S Maintenance UK Limited | Administrative & support | 2021 |
| H&D Houses to Homes Ltd | Real estate | 2025 |
| H&E Engineering Services Ltd | Administrative & support | 2025 |
| H&J Property Rentals Ltd | Real estate | 2025 |
| H&K Bars and Hospitality Ltd | Hospitality | 2024 |
| H&K Thorn Inn Ltd | Hospitality | 2025 |
| H&N Brickworks Limited | Construction | 2022 |
| H&S Electrical and Renewables Ltd | Construction | 2022 |
| H&T Holdings Limited | Construction | 2015 |
| H&W Lloyd Estates Ltd | Real estate | 2023 |
| H-Let Limited | Real estate | 2022 |
| H.E Specialities Limited | Wholesale & retail | 1983 |
| H.F.T.S Limited | Transport & logistics | 2017 |
| H.Melrose Ltd | Administrative & support | 2019 |
| H.S&E.J Limited | Real estate | 2026 |
| H2 Scot Limited | Administrative & support | 2014 |
| H2O Satellite Limited | Information & communication | 2010 |
| H4 Management Limited | Professional & scientific | 2010 |
| HA Dania Limited | Information & communication | 2023 |
| HA2 Ltd | Information & communication | 2006 |
| Habibu Medical Services Limited | Health & social care | 2015 |
| Habitat Practice Limited | Professional & scientific | 2013 |
| HAC Technical Services Limited | Administrative & support | 2025 |
| Hacker & Co. Ltd | Information & communication | 2015 |
| Hacksaw Consulting Limited | Administrative & support | 2024 |
| Hadi Technical Ltd | Professional & scientific | 2022 |
| Hadleyhaus Limited | Construction | 2022 |
| Hage Development Ltd | Real estate | 2026 |
| Hago Property Ltd | Real estate | 2016 |
| Haier Smart Home UK & I Ltd | Manufacturing | 1990 |
| Haigh Developments Observer Building Limited | Construction | 2021 |
| Haigh Developments - Bewsey Street Ltd | Extraterritorial | 2019 |
| Haigh Developments - Intro House Ltd | Construction | 2019 |
| Haigh Developments - Mere Lane Ltd | Extraterritorial | 2024 |
| Haigh Developments - Victoria Buildings Ltd | Construction | 2019 |
| Haigh Holdings Group Ltd | Financial services | 2019 |
| Haigh Homes Ltd | Construction | 2019 |