| Gold Eagle Global Ltd | Wholesale & retail | 2013 |
| Gold Space (UK) Limited | Wholesale & retail | 1997 |
| Golden Image (UK) Limited | Real estate | 1989 |
| Golden Rollers Ltd | Construction | 2013 |
| Goldman BEE Limited | Information & communication | 2006 |
| Goldreed Investments Limited | | 1983 |
| Goldshield Property Development Limited | Administrative & support | 2021 |
| Goldsilver Trading Limited | Wholesale & retail | 2003 |
| Goldtibs Limited | Real estate | 1986 |
| Good Harvest Partnership LLP | | 2004 |
| Good Run Guide Ltd. | Arts & recreation | 2007 |
| Good Taste 24/7 Ltd | Wholesale & retail | 2024 |
| Goodwin's Hardware Wholesalers (London) Limited | Other services | 1998 |
| Gorasia LLP | | 2005 |
| Goregrange (Communicators) Limited | | 1979 |
| Gorkha Healthcare Limited | Professional & scientific | 2020 |
| Gouhari Enterprises Limited | Real estate | 1989 |
| Government ROW Residents Association Limited | Households | 1997 |
| GP Library Ltd | Information & communication | 2006 |
| Gpconnolly Limited | Professional & scientific | 2019 |
| Grace Embassy Limited | Other services | 2015 |
| Gradebase Limited | Wholesale & retail | 1986 |
| Grady Construction Limited | Construction | 2006 |
| Graham White (Butchers) Limited | Transport & logistics | 1992 |
| Granary Care Limited | Administrative & support | 2002 |
| Grand by Designs Limited | Wholesale & retail | 2005 |
| Grand Union Village Community Development Trust | Other services | 2003 |
| Grandsden Land Company Limited | Real estate | 2003 |
| Grandville International Limited | Administrative & support | 2008 |
| Grange Road Property Company Limited | Households | 1999 |
| Granite Software Limited | Information & communication | 1984 |
| Grant Bleakley Property Services Ltd | Construction | 2000 |
| Grant Family Projects Limited | Real estate | 2025 |
| Grantham & Ives Limited | Construction | 1935 |
| Grantlink Limited | Wholesale & retail | 1996 |
| Granville Street (Dover) Development Limited | Real estate | 2021 |
| Grapevines Ltd | Transport & logistics | 2003 |
| Graul Mcmahon Ltd | Construction | 2014 |
| GRB Consulting Limited | Information & communication | 2005 |
| Greedies Deli Ltd | Hospitality | 2007 |
| Green BEE Productions Limited | Information & communication | 2012 |
| Green by Design Limited | Construction | 1993 |
| Green Enterprise Ltd. | Hospitality | 2006 |
| Green Leas Limited | Wholesale & retail | 2005 |
| Green Stripes Garden Services Limited | Administrative & support | 2002 |
| Green Valley (UK) Limited | Wholesale & retail | 2006 |
| Green Zebra Limited | Professional & scientific | 2004 |
| Greenblades London Ltd | Administrative & support | 2021 |
| Greenlane Convenience Store Limited | Wholesale & retail | 2025 |
| Greenlawn Homes Limited | Professional & scientific | 2000 |
| Greenstone Pictures Ltd. | Information & communication | 1997 |
| Greenward Properties Limited | Real estate | 2007 |
| Greg Atkins Productions Limited | Arts & recreation | 2008 |
| Greg Morgan Limited | Information & communication | 2010 |
| Grey & Company (Wembley) Limited | Real estate | 1991 |
| Grey Investment Office Limited | Real estate | 2020 |
| Greyline Group Limited | Construction | 1974 |
| Greymax Digital Capital Ltd | Financial services | 2026 |
| Greymax Holdings Limited | Real estate | 2024 |
| Greystore Limited | | 1977 |
| Griffin Capital Partners Limited | Financial services | 1999 |
| Grillicious Foods Ltd | Hospitality | 2018 |
| Grim's Dyke Golf Club Limited(The) | Arts & recreation | 1910 |
| Groh Limited | Wholesale & retail | 2026 |
| Gromyko Co UK Ltd | Professional & scientific | 2001 |
| Group Promotions Limited | Administrative & support | 1992 |
| Grouptype Limited | Wholesale & retail | 2001 |
| Grundy Group Management Services Limited | | 1938 |
| GRV Properties Ltd | Real estate | 2018 |
| GS Accountancy Limited | Professional & scientific | 2002 |
| GSG Agreements Limited | Real estate | 2025 |
| GSJ Key Services Limited | Administrative & support | 2024 |
| GTA Fpso Company Ltd | Mining & quarrying | 2021 |
| GTO Automotive Limited | Professional & scientific | 1993 |
| GTV Construction Ltd | Construction | 2018 |
| Guangdong Investments Limited | Professional & scientific | 2002 |
| Guardian Angels Home Health Care Agency(Gahhca) Limited | Health & social care | 1999 |
| Gumlu Limited | Real estate | 2003 |
| Gunaz Enterprises Limited | Real estate | 2006 |
| Gurnam Grewal Limited | Information & communication | 2001 |
| Gursoy & Co. Accountants Limited | Professional & scientific | 2004 |
| Guru Nanak Financial Services Limited | Financial services | 2022 |
| GW Portfolio Management Services Ltd | Financial services | 2022 |
| GWR 690 Ltd | Real estate | 2026 |
| Gypsy Billionaire Ltd | Information & communication | 2023 |
| GZG Holdings Ltd | Households | 2024 |
| H & a Optometrists Limited | Wholesale & retail | 2003 |
| H & C Properties Limited | Real estate | 1995 |
| H & G Builders Limited | Other services | 2002 |
| H & L Motors (Twickenham) Limited | Extraterritorial | 2006 |
| H Lounge Ltd | Hospitality | 2020 |
| H Prestige Estates Limited | Real estate | 2024 |
| H Simpson Limited | Information & communication | 2007 |
| H&S UK Estates Limited | Real estate | 2025 |
| H. M. I. S. Limited | Professional & scientific | 1996 |
| H.A. Insurance and Management Services Limited | Professional & scientific | 1986 |
| H.A.D. Limited | Households | 1999 |
| H.E.A.T. Foundation Ltd | Other services | 2005 |
| Hackwood Mini Mart Limited | Wholesale & retail | 2025 |
| Hadworth Leisure Limited | Wholesale & retail | 1996 |