| Frysco Care Limited | Health & social care | 2013 |
| Fssc Services Limited | Construction | 2007 |
| Fulham Loft Conversions Limited | Construction | 2003 |
| Full House Bingo Limited | Arts & recreation | 2005 |
| Full Stop Brakes Ltd | Wholesale & retail | 2016 |
| Funding Advisory Services Limited | Professional & scientific | 2003 |
| Funds Reunited Limited | Administrative & support | 2003 |
| Fusenets Limited | Agriculture & fishing | 2000 |
| Fusion IT Recruitment Services Limited | Administrative & support | 2004 |
| Future Floors Limited | Wholesale & retail | 2003 |
| Future Formats Limited | Information & communication | 1999 |
| Future Housing Ltd | Construction | 2001 |
| Future I.T. Solutions Limited | Information & communication | 1998 |
| Future Tech Labs Limited | Information & communication | 2016 |
| Futuredeed Property Management Limited | Households | 1988 |
| FV & JK Consulting Limited | Information & communication | 2001 |
| G & W Builders & Groundworks Ltd | Construction | 2006 |
| G D S Associates (LON) Limited | Professional & scientific | 2006 |
| G J Lowe Limited | Professional & scientific | 2003 |
| G Life Limited | Wholesale & retail | 2007 |
| G M Construction & Developments Limited | Construction | 2005 |
| G M Designs (UK) Limited | Wholesale & retail | 2007 |
| G M Properties (UK) Limited | Real estate | 2000 |
| G R C Mouldings Ltd | Construction | 2003 |
| G&T Ventures Limited | Real estate | 2007 |
| G. Buckley (Electrical Contractors) Limited | Construction | 1997 |
| G. C. T. T. Limited | Arts & recreation | 2002 |
| G. Ioannou Limited | Arts & recreation | 2005 |
| G.B. Demolition Co. Limited | | 1985 |
| G.D.L. Electrical Services Limited | Construction | 2005 |
| G.I. Landscapes Ltd | Administrative & support | 2005 |
| G.L. Management Service Co. | Administrative & support | 1993 |
| G.M. Aero Support Limited | Wholesale & retail | 2005 |
| G.S. Lunnon & Company Limited | Financial services | 1993 |
| G.U.W. Trading Limited | | 1977 |
| G1 / G2 Limited | Real estate | 2007 |
| G1395 Limited | Information & communication | 1997 |
| G2 Ocean UK Ltd | Transport & logistics | 2026 |
| Gadzhev Ltd | Other services | 2022 |
| Gaillard Properties Limited | Professional & scientific | 1988 |
| GAL Systems Limited | Wholesale & retail | 2004 |
| Gallen Property LLP | | 2023 |
| Gallopack UK Limited | Wholesale & retail | 2003 |
| Galpin's Services Limited | Transport & logistics | 1999 |
| Gamescope Limited | Information & communication | 1984 |
| Gamlev Catering Ltd | Hospitality | 2026 |
| GAN Investments Limited | Real estate | 2004 |
| GAP Computing Limited | Information & communication | 2004 |
| Garden Fencing Limited | Professional & scientific | 2002 |
| Garden Force UK Ltd | Administrative & support | 2004 |
| Garden Inspirations Surrey Limited | Administrative & support | 2000 |
| Gardenspray Limited | Wholesale & retail | 2004 |
| Garfield Microelectronics Limited | Manufacturing | 1994 |
| Garhigh Holdings Limited | Real estate | 2006 |
| Garini Ltd | Transport & logistics | 2017 |
| Garland Contracts Limited | Construction | 1992 |
| Garratt Terrace Property Management Services Limited | Real estate | 1995 |
| GAS Maintenance Heating Limited | Energy | 2007 |
| GAS Mart Limited | Professional & scientific | 2015 |
| Gate Automation & Door Systems Limited | Wholesale & retail | 2004 |
| Gateforce Property Management Limited | Real estate | 1984 |
| Gatton Park Lettings Limited | Real estate | 1996 |
| Gatwick Catering Equipment & Servicing Ltd | Wholesale & retail | 2018 |
| Gatwick Connect Limited | Administrative & support | 1999 |
| Gavstam-Uk Limited | Wholesale & retail | 2005 |
| Gayatri Management Services Limited | Professional & scientific | 1993 |
| GB - Legal & Property Consulting Limited | Professional & scientific | 2013 |
| GB Executive Chauffeurs Ltd | Transport & logistics | 2021 |
| GB Motorz (Shepperton) Limited | Wholesale & retail | 2004 |
| GB QP Services Limited | Manufacturing | 2005 |
| GBH Limited | Professional & scientific | 2004 |
| GBM Bakery Retail Ltd | Hospitality | 2020 |
| GBR Yachts Limited | Transport & logistics | 2004 |
| GBS Consulting Limited | Wholesale & retail | 2003 |
| GCC Children’S Therapeutic Services Ltd | Health & social care | 2025 |
| GCC Facilities Management Ltd | Administrative & support | 1975 |
| GCS Services Ltd | Administrative & support | 2020 |
| GDG Delivery Ltd | Transport & logistics | 2023 |
| Gemnetics Limited | Other services | 2001 |
| GEN Two Joinery Projects Ltd | Manufacturing | 2022 |
| Geneline Limited | Professional & scientific | 2000 |
| General Micronetics Holdings Limited | Financial services | 1966 |
| Genet Marine Limited | Construction | 1972 |
| Geneva Road Ltd | Health & social care | 1995 |
| Gentlefoot Limited | Professional & scientific | 2007 |
| Gentry Properties Limited | Households | 1993 |
| GEO. Morris Limited | Professional & scientific | 2002 |
| Geodome Limited | Construction | 1996 |
| Geoffrey Mowbray (Publications) Limited | Professional & scientific | 1991 |
| George Arthur (Butchers) Limited | Wholesale & retail | 1963 |
| George Gilbert Limited | Professional & scientific | 2007 |
| George Lancaster (International) Limited | Other services | 1991 |
| Gerald, UK Immigration & Legal Services Ltd. | Professional & scientific | 2018 |
| GET and Buy Ltd | Wholesale & retail | 2023 |
| GET Stuff’D Ltd | Hospitality | 2025 |
| GET YOU Limited | Education | 2016 |
| GET2THEPOINT Limited | Other services | 2002 |
| GFC Construction Ltd | Construction | 2022 |
| GG-532-582 Limited | Real estate | 2022 |
| GG-769-026 Limited | Real estate | 2022 |