| Freedom Hairdressing Limited | Other services | 2025 |
| Fresh Mortgages-Uk Limited | Financial services | 2015 |
| Fresh Talent Solutions Ltd | Administrative & support | 2022 |
| Freshbins UK Limited | Water & waste | 2003 |
| Freshka Limited | Administrative & support | 2009 |
| Friends in Data Limited | Information & communication | 2026 |
| Frithsden Copse Frontagers Limited | Households | 1953 |
| Frithsden Finance (Birmingham) Limited | Financial services | 2007 |
| Frogs Kitchen Limited | Extraterritorial | 2016 |
| FS Asset Management Limited | Professional & scientific | 2006 |
| Full Frontal Marketing Ltd | Information & communication | 2020 |
| Full House Property Maintenance Ltd | Construction | 2011 |
| Full Loop Trading Limited | Information & communication | 2023 |
| Funambulist Limited | Professional & scientific | 2024 |
| Future Policy Consulting Ltd | Professional & scientific | 2025 |
| Futuretech Recruitment Ltd | Administrative & support | 2020 |
| G & H Soft Furnishings Ltd | Manufacturing | 2004 |
| G H Bass Ltd | Information & communication | 2012 |
| G J Knight and Co Limited | Construction | 2016 |
| G P Minns Limited | Construction | 2012 |
| G W R Designs Limited | Professional & scientific | 2012 |
| Gadby Limited | Administrative & support | 2016 |
| Gade Group Limited | Professional & scientific | 2010 |
| Gade Homes (Cd.L) Limited | Construction | 2020 |
| Gade Homes (Enfield) Ltd | Construction | 2020 |
| Gade Homes (Fd.C) Limited | Construction | 2019 |
| Gade Homes (Md.P) Limited | Construction | 2021 |
| Gade Homes Enfield Investments Limited | Real estate | 2024 |
| Gade Homes Limited | Construction | 1971 |
| Gade Property Developments Limited | Construction | 2018 |
| Gade Valley Farms Limited | Agriculture & fishing | 1963 |
| Gallus GAL Ltd | Information & communication | 2018 |
| Game Changer Sports (Entertainment) Limited | Information & communication | 2023 |
| Gameshift Ltd | Professional & scientific | 2011 |
| Gaucho Consulting Limited | Professional & scientific | 2013 |
| GB Shed Ltd | Education | 2024 |
| GCG UK Holdings Ltd | Professional & scientific | 2021 |
| Gcsi Ltd | Extraterritorial | 2025 |
| GDP Property Management Ltd | Real estate | 2022 |
| GEM Groundworks Limited | Construction | 2024 |
| GEM Plant Group Ltd | Administrative & support | 2022 |
| Generations People Limited | Administrative & support | 2023 |
| Generic Business Services Ltd | Professional & scientific | 2000 |
| GES Consult Ltd | Professional & scientific | 2019 |
| GET Aiducated Limited | Professional & scientific | 2025 |
| GET Serious Limited | Professional & scientific | 2016 |
| GG Apparel Ltd | Wholesale & retail | 2024 |
| Gilgil Ltd | Hospitality | 2022 |
| Gill Dobby Childminding Services Ltd | Health & social care | 2026 |
| Gillespie Manners Limited | Administrative & support | 2010 |
| Gingerpower Limited | Administrative & support | 2014 |
| Given Ltd | Administrative & support | 2026 |
| GJB Consultancy Limited | Professional & scientific | 2022 |
| Glanteifion Residents Managements (NO.2) Limited | Real estate | 1989 |
| Glaudax Cycle Tours LLP | | 2020 |
| Glebe Property Limited | Real estate | 2016 |
| Glenariff Associates Limited | Professional & scientific | 2020 |
| Glenmornan Limited | Information & communication | 2021 |
| Glenta Limited | Professional & scientific | 2019 |
| Glenview Real Estate Ltd | Real estate | 2025 |
| Glia Ecosystems Limited | Information & communication | 2015 |
| Gloam Agency Ltd | Professional & scientific | 2016 |
| Global Data Partners Limited | Information & communication | 2011 |
| Global Project Services Limited | Professional & scientific | 1997 |
| Global Village Consulting Limited | Professional & scientific | 2006 |
| Globe Active Ltd | Arts & recreation | 2013 |
| Globestar Management LLP | | 2010 |
| Glory and Grace Enterprises Ltd | Real estate | 2023 |
| GMS Consulting Group Limited | Information & communication | 2021 |
| Go-Forward Vehicle Management Ltd. | Administrative & support | 2015 |
| Gobstoppers Education | Arts & recreation | 2013 |
| Godstone Data Services Limited | Information & communication | 1989 |
| GOL - MAT Limited | Transport & logistics | 2026 |
| Gold Key Breakfast Club Ltd | Health & social care | 2023 |
| Goodnight Starry Ltd | Wholesale & retail | 2018 |
| Goose Media Services Ltd | Information & communication | 2020 |
| Gordon Road Holdings Limited | Real estate | 2017 |
| Gorgeous (Berkhamsted) Limited | Other services | 2006 |
| Gorgeous Beauty Limited | Other services | 2007 |
| Gorgeous Retail Group Ltd | Wholesale & retail | 2020 |
| Gorgeous Shop Ltd | Wholesale & retail | 2006 |
| Goss Consultancy Limited | Administrative & support | 2001 |
| GOT the Touch Limited | Professional & scientific | 2026 |
| Gotsoccer UK Limited | Other services | 2009 |
| Grace Victory Limited | Arts & recreation | 2016 |
| Graemesdyke Property Co.Limited | Real estate | 1959 |
| Grafton Optical Company Limited | Wholesale & retail | 1954 |
| Grand Union Crossfit Limited | Arts & recreation | 2018 |
| Grant Franklin Limited | Professional & scientific | 2010 |
| Grantham Self Storage Limited | Extraterritorial | 2021 |
| Gravity Lighting Ltd | Administrative & support | 2016 |
| Great Apes Ltd | Information & communication | 2024 |
| Green Home Ltd | Construction | 2007 |
| Green Mountain Limited | Professional & scientific | 2024 |
| Greenandrock Limited | Construction | 2017 |
| Greenbyte Ltd | Real estate | 2022 |
| Greenes Property Holdings Ltd | Financial services | 2021 |
| Greenes Property Management Ltd | Real estate | 2010 |
| Greenside Putting Ltd | Arts & recreation | 2026 |
| Greenstar Renewables (Italy) Ltd. | Professional & scientific | 2019 |