| Freehold Investors Limited | Real estate | 2007 |
| Freestyle Lighting Limited | Manufacturing | 1992 |
| Fresco Fisheries (UK) Limited | Wholesale & retail | 1997 |
| Fresco Prime Ltd | Administrative & support | 2019 |
| Fresh Food Innovation Ltd | Wholesale & retail | 2013 |
| Fresh Start Painting and Decorating Services Ltd | Construction | 2021 |
| FRM Construction Ltd | Construction | 2021 |
| Frontline Health Professionals Ltd | Administrative & support | 2020 |
| Frontline Insourcing Ltd | Health & social care | 2023 |
| Frontline Social Care Ltd | Health & social care | 2023 |
| FS Fire Services Ltd | Construction | 2019 |
| FSH Real Estate Limited | Real estate | 2026 |
| FT International Trading Ltd | Wholesale & retail | 2023 |
| Ftft Finance UK Limited | Administrative & support | 2009 |
| Ftkc Limited | Information & communication | 1997 |
| Fulham Properties Limited | Real estate | 2006 |
| Functionality Information Management Limited | Wholesale & retail | 2011 |
| Funside Limited | Administrative & support | 2014 |
| Fuse Force Electricals Ltd | Construction | 2024 |
| Fusion Blinds Limited | Wholesale & retail | 2009 |
| Futebol Consulting Limited | Professional & scientific | 2017 |
| Future Briks Ltd | Real estate | 2023 |
| Future Forward International Ltd | Wholesale & retail | 2023 |
| Future Fusion Ltd | Real estate | 2019 |
| Future Green Projects Limited | Information & communication | 2010 |
| G-Force Consulting Ltd | Professional & scientific | 2021 |
| G.A.C 24/7 Solutions Limited | Construction | 2016 |
| G.A.Shepherd Investments Limited | Construction | 1959 |
| G.G.Properties UK Ltd | Construction | 2006 |
| G.H. International Trading Services Limited | Administrative & support | 1981 |
| G.O.A.L Property Group Ltd | Real estate | 2024 |
| G.O.A.L Property Investments Ltd | Real estate | 2024 |
| G20 Limited | Construction | 2007 |
| G3 Mechanics Ltd | Professional & scientific | 2026 |
| G4 Development Limited | Construction | 1991 |
| Gage Investments and Management Ltd | Construction | 2025 |
| Gagliardi Design Limited | Wholesale & retail | 1978 |
| Gainsborough House Sawbridgeworth Management Company Limited | Households | 2023 |
| Galata 01 Ltd | Hospitality | 2019 |
| Galaxy Internet Limited | Information & communication | 2021 |
| Gallagher & SON Carpentry Limited | Construction | 2018 |
| Gamma Management Ltd | Real estate | 2023 |
| Ganderbond Estates Ltd | Real estate | 2020 |
| Ganderbond Properties Ltd | Real estate | 2020 |
| Gansoon Limited | Wholesale & retail | 2011 |
| Gapoak Limited | Hospitality | 2023 |
| Garage Deluxe Ltd | Professional & scientific | 2023 |
| Garage Doors (Potters Bar) Limited | Wholesale & retail | 2003 |
| Garbers Ltd | Health & social care | 2021 |
| Garden Residences Ltd | Real estate | 2019 |
| Gardiner's World Limited | Information & communication | 2014 |
| Gatesway Solar Limited | Energy | 2013 |
| Gavc Technology Ltd | Information & communication | 2025 |
| Gaventa Distribution Limited | Wholesale & retail | 1993 |
| Gavll Properties Ltd | Real estate | 2025 |
| Gawor Architects Limited | Professional & scientific | 2012 |
| Gbpa (UK) Ltd | Administrative & support | 2012 |
| GC Energy Solutions Limited | Construction | 2020 |
| GC Independent Consulting Ltd | Information & communication | 2018 |
| GCD Mini Market Ltd | Wholesale & retail | 2025 |
| GDS Property Developments Limited | Real estate | 2017 |
| Geac Properties Ltd | Real estate | 2023 |
| Geary Joinery Ltd | Administrative & support | 2025 |
| Gelsha Properties Limited | Real estate | 2020 |
| GEM Heart Ltd | Real estate | 2020 |
| Gemini Security Solutions Limited | Administrative & support | 2016 |
| Gemsbuilds Ltd | Construction | 2024 |
| Gencar Ltd | Wholesale & retail | 2024 |
| General Insurance Solutions Limited | Financial services | 2004 |
| General Management Ltd | Administrative & support | 2015 |
| Generally UN- Limited | Information & communication | 2024 |
| Generation 2 Media Ltd | Professional & scientific | 2012 |
| Genesis Supported Living Ltd | Health & social care | 2024 |
| Genex Stones London Ltd | Administrative & support | 2021 |
| Gentaur Limited | Administrative & support | 2010 |
| Genvissa Limited | Professional & scientific | 2025 |
| Georgeson Foreign Exchange Limited | Financial services | 2021 |
| Georghiades & Associates Limited | Professional & scientific | 2006 |
| Georgios Vasilikostas Ltd | Health & social care | 2012 |
| Gerson Moving Services Limited | Transport & logistics | 2005 |
| Gerson Relocation Limited | Transport & logistics | 2008 |
| Getz Account Ltd | Professional & scientific | 2019 |
| Giais Ltd | Mining & quarrying | 2002 |
| Giannina Filomena Carlino Limited | Extraterritorial | 2025 |
| Gibson Nominees Ltd | Administrative & support | 2014 |
| Giftdale Holding Ltd | Financial services | 2024 |
| Giftdale Investments Holding Ltd | Financial services | 2024 |
| Giftdale Investments LLP | | 2009 |
| Giftdale Limited | Professional & scientific | 1999 |
| GIL Agencies Limited | Wholesale & retail | 2013 |
| Gilbert & SON Real Estate Ltd | Real estate | 2020 |
| Ginger & Mylo Interiors Ltd | Administrative & support | 2017 |
| Gjimi Construction Ltd | Construction | 2020 |
| Gkoa Limited | Professional & scientific | 2014 |
| GKZ Solutions Limited | Professional & scientific | 2021 |
| Glam Homes Ltd | Real estate | 2017 |
| Glamorous Beauty Ltd | Other services | 2025 |
| Glass Rainscreens Ltd | Manufacturing | 2020 |
| GLB Services Ltd | Administrative & support | 2025 |
| Glenbuck Publishing Limited | Professional & scientific | 2006 |