| Fung & Fung Limited | Real estate | 2021 |
| Furkki Ltd | Hospitality | 2024 |
| Fury TNT Promotions Ltd | Other services | 2023 |
| Furze Manor Lettings Ltd | Real estate | 2023 |
| Futboly Ltd | Administrative & support | 2023 |
| Future Computer Services Limited | Information & communication | 1996 |
| Future Dining Ltd | Hospitality | 2021 |
| Future of Great Gardens Limited | Administrative & support | 2020 |
| Future Projects London Limited | Financial services | 2021 |
| Future Ready Property Management Ltd | Real estate | 2025 |
| Future Reality Labs Limited | Real estate | 2020 |
| G & a Scaffolding Limited | Construction | 2025 |
| G & W Transport Ltd | Transport & logistics | 2025 |
| G B & M Cundall Limited | Manufacturing | 2024 |
| G G J Rayner Property Investments Limited | Real estate | 2024 |
| G Pros Management Services Ltd | Administrative & support | 2013 |
| G&R Consulting Ltd | Administrative & support | 2023 |
| G'S Pet Services Ltd | Other services | 2026 |
| G. Laing Construction Limited | Other services | 2005 |
| G.D.A. Installations Limited | Extraterritorial | 2004 |
| G2 Group Limited | Professional & scientific | 2025 |
| Gabriella Lucy PR Ltd | Professional & scientific | 2023 |
| Gage Project Management Limited | Professional & scientific | 2016 |
| Galvin Consultancy Limited | Professional & scientific | 2019 |
| Gardner's Trustee | Extraterritorial | 1910 |
| Garganey Consulting Limited | Professional & scientific | 2012 |
| Garry Neave Consultancy Solutions Ltd | Professional & scientific | 2010 |
| Gartenbahn Supplies Limited | Wholesale & retail | 2022 |
| Gary L Properties Limited | Real estate | 2016 |
| GAS and Elec Services Limited | Construction | 2015 |
| Gaston Common Ltd | Professional & scientific | 2015 |
| Gatherround Consultants Ltd | Professional & scientific | 2014 |
| GB Creations LLP | | 2014 |
| GC Park Limited | Construction | 2021 |
| GCR Associates Ltd | Financial services | 2011 |
| GCS Groundcare Ltd | Administrative & support | 2021 |
| GD Elite Construction Ltd | Construction | 2024 |
| GEL Project Management Ltd | Construction | 2020 |
| Gemi Capital Ltd | Extraterritorial | 2015 |
| Gemma Ethics & Research Ltd | Wholesale & retail | 2017 |
| Gemni Holdings Limited | Real estate | 2020 |
| Genewiz UK Limited | Professional & scientific | 2016 |
| Genie IQ Limited | Information & communication | 2024 |
| George E. Buxton Limited | Construction | 1986 |
| George Hogan & Sons Ltd | Construction | 2020 |
| George Markwell (Builders) Limited | Construction | 2002 |
| Georgianauk Services Ltd | Health & social care | 2016 |
| GET ME Leads Ltd | Professional & scientific | 2017 |
| GFM Highland Ltd | Agriculture & fishing | 2009 |
| GG Invest Ltd | Professional & scientific | 2021 |
| Gherkin Digital Limited | Professional & scientific | 2011 |
| GHG Professional Services Ltd | Professional & scientific | 2023 |
| GHW Residences Ltd | Real estate | 2026 |
| GIB Construction Ltd | Construction | 2019 |
| Gibpad Engineering Limited | Manufacturing | 2002 |
| Gies Limited | Professional & scientific | 2017 |
| Ginger Heart Ltd | Information & communication | 2021 |
| Girl VS Cancer Ltd | Health & social care | 2021 |
| Girlvscancer Store Ltd | Health & social care | 2021 |
| Giuricich Holdings Ltd | Financial services | 2020 |
| Givenomics Ltd | Administrative & support | 2014 |
| GJE Site Management Ltd | Construction | 2023 |
| Gladwyns Properties Ltd | Real estate | 2019 |
| Glamour B Stortford Limited | Other services | 2019 |
| Glanua UK Limited | Water & waste | 2015 |
| Glass Fit ( Showers) Ltd | Construction | 2025 |
| Glass Fit Bespoke Limited | Construction | 2024 |
| Glass Offices 4U Limited | Construction | 2020 |
| Glassworks E17 Ltd | Construction | 2025 |
| GLB Buildings Ltd | Construction | 2024 |
| GLB Group Ltd | Information & communication | 2026 |
| Glencoe Search Limited | Administrative & support | 2020 |
| Glimfeather Films Ltd | Arts & recreation | 2020 |
| Glistening Coaching Ltd | Professional & scientific | 2020 |
| Global 600 Limited | Real estate | 2012 |
| Global Fresh Produce and Groceries UK Ltd | Wholesale & retail | 2025 |
| Global RTS Ltd | Health & social care | 2014 |
| Global Trade Credit Alliance Ltd | Administrative & support | 2001 |
| Glow by MW Fitness Limited | Other services | 2021 |
| GLP Rail Limited | Professional & scientific | 2023 |
| GLW Services Ltd | Construction | 2025 |
| Gmode Consultancy Limited | Information & communication | 2004 |
| Gmztalent Limited | Administrative & support | 2023 |
| GN Image Services Ltd | Administrative & support | 2021 |
| Goat'D Limited | Hospitality | 2025 |
| Gobby Girl Productions Limited | Information & communication | 2014 |
| Goblinmaster Limited | Wholesale & retail | 2019 |
| Gody Limited | Information & communication | 2023 |
| Gold LUX Group Limited | Wholesale & retail | 2024 |
| Gold Stag Accounts Ltd | Professional & scientific | 2017 |
| Goldcastle Estates Limited | Real estate | 2000 |
| Goldelm Limited | Other services | 2003 |
| Golden Mini Market Stortford Ltd | Wholesale & retail | 2025 |
| Golden T Property Ltd | Hospitality | 2023 |
| Goldmere Ltd | Hospitality | 2019 |
| Goldring Products Limited | Professional & scientific | 1976 |
| Goldsmiths Grove Management Limited | Real estate | 2005 |
| Golf World Stansted Limited | Real estate | 2019 |
| Good Skills Training Limited | Administrative & support | 2007 |
| Gormville Limited | Professional & scientific | 2013 |