| G4 Painting & Decorating Ltd | Construction | 2025 |
| G76 Services Ltd | Real estate | 2010 |
| Gaap Orphanage Foundation | Administrative & support | 2008 |
| Gabos B Urban Ltd | Wholesale & retail | 2026 |
| Gadget 365 Ltd | Wholesale & retail | 2024 |
| Gadgetrixa Ltd | Wholesale & retail | 2026 |
| Gaffney, Condron & Associates Limited | Professional & scientific | 2007 |
| Gaia Earth Sciences Limited | Mining & quarrying | 2003 |
| Gaiety (Clacton) Limited | Arts & recreation | 1994 |
| Gainsville Ltd | Information & communication | 2017 |
| Gaish Sealants Limited | Construction | 2006 |
| Galdam Property Consultants Limited | Real estate | 2021 |
| GALES85 Limited | Hospitality | 2021 |
| Galleon Court Residents Association Limited | Households | 1990 |
| Gamberland Ltd | Other services | 2025 |
| Gamble Graphics Limited | Administrative & support | 2012 |
| Gamdivi Limited | Information & communication | 2026 |
| GAO Express Distribution Limited | Manufacturing | 2022 |
| Gapingo Ltd | Wholesale & retail | 2022 |
| GAQ International Ltd | Wholesale & retail | 2020 |
| Garden Solutions Limited | Administrative & support | 2011 |
| Garip's Superstore Ltd | Wholesale & retail | 2019 |
| Garland Gates Consulting Limited | Information & communication | 2018 |
| Garner-Stevens & Co Ltd. | Professional & scientific | 1995 |
| Garon Investments Limited | Real estate | 2003 |
| GAS Connect Heating Limited | Construction | 2002 |
| Gasharly Ltd | Wholesale & retail | 2026 |
| Gatemotion Ltd | Manufacturing | 2023 |
| Gatepost Estates Limited | Real estate | 1998 |
| Gaterange Limited | Real estate | 1987 |
| Gateway Mayfair Lettings Limited | Real estate | 2022 |
| Gazitos Limited | Real estate | 2026 |
| Gazza Visualeyes Limited | Health & social care | 2005 |
| Gbasics Ltd | Wholesale & retail | 2025 |
| Gbeyinsc Consulting Ltd | Professional & scientific | 2014 |
| GBJ Conceirge Limited | Wholesale & retail | 2023 |
| GBR Bells Ltd | Water & waste | 2019 |
| GBR Cars Ltd | Administrative & support | 2023 |
| GC Management Solutions Limited | Professional & scientific | 2004 |
| Gecko Trading Limited | Wholesale & retail | 1997 |
| GEE Concert Ltd | Administrative & support | 2012 |
| Geemac Investments Ltd | Construction | 2023 |
| Geemac Property’S Limited | Construction | 2023 |
| Geevee Services Limited | Agriculture & fishing | 2007 |
| Gelmoor Limited | Administrative & support | 2006 |
| GEM Forte Limited | Extraterritorial | 2016 |
| GEM Khinda Builders Ltd | Construction | 2021 |
| Gemba Continuous Improvement Ltd | Information & communication | 2023 |
| Gemini Euro Ltd | Wholesale & retail | 2024 |
| Gemini Leasing Limited | | 1982 |
| Gemlink Estates Ltd | Hospitality | 1997 |
| Gemplan Limited | Administrative & support | 2006 |
| Gemuse Limited | Wholesale & retail | 2026 |
| Gencio Ltd | Professional & scientific | 2024 |
| General Aviation Avionics (Services) Limited | Manufacturing | 2007 |
| Generations Limited | Real estate | 2005 |
| Genesiscore Limited | Wholesale & retail | 2026 |
| Genus Security Group Limited | Construction | 2018 |
| GEO GAS Limited | Construction | 2002 |
| Geoff King Associates Limited | Information & communication | 2001 |
| George Mackeonis Limited | Professional & scientific | 1959 |
| George R Beau Limited | Real estate | 2025 |
| George Tyre Services Limited | Wholesale & retail | 1976 |
| Gerald Mcdonald & Company Limited | Manufacturing | 1931 |
| Gerald Mcdonald (Herbs & Spices) Limited | Manufacturing | 1927 |
| Gerald Mcdonald (Holdings) Limited | Professional & scientific | 2017 |
| Gerard Pereira Limited | Information & communication | 2003 |
| Geras (Frinton) Limited | Construction | 2022 |
| Gerrard Hair Design | | 1992 |
| Gerry Bepton Limited | Hospitality | 2017 |
| Getblindbox Ltd | Wholesale & retail | 2025 |
| Getwish Co Ltd | Wholesale & retail | 2025 |
| Gevolution Limited | Extraterritorial | 2008 |
| GG-571-988 Limited | Real estate | 2023 |
| GG-739-196 Limited | Real estate | 2023 |
| GH Ignite Ltd | Wholesale & retail | 2023 |
| Ghalib Softs Limited | Wholesale & retail | 2025 |
| Ghazali’S Limited | Health & social care | 2023 |
| Ghulam Haider 05 Ltd | Wholesale & retail | 2026 |
| Ghulam Ltd | Wholesale & retail | 2026 |
| Ghulam MD Ltd | Wholesale & retail | 2025 |
| GHW Consultancy Ltd | Professional & scientific | 2025 |
| GI Coaching & Impact Ltd | Professional & scientific | 2025 |
| Gidea Motors Limited | Wholesale & retail | 2004 |
| Giess Wallis Crisp LLP | | 2007 |
| Gifford Contractors (Essex) Limited | Wholesale & retail | 1982 |
| Gift AID Services Limited | Administrative & support | 2007 |
| GIG Investments Limited | Health & social care | 2000 |
| Gilberts Services (Holdings) Limited | Transport & logistics | 1981 |
| Gilburn Freight Services(U.K.)Limited | | 1971 |
| Gill Properties London Limited | Real estate | 2017 |
| Gillard & Sons Limited | Construction | 1989 |
| Gillswigworld Ltd | Other services | 2016 |
| Gilmartins Holdings Ltd | Financial services | 2025 |
| GIN Flooring Ltd | Construction | 2006 |
| Ginamove Limited | Real estate | 1986 |
| Girlwhotattoos Ltd | Arts & recreation | 2021 |
| Gism Ltd | Hospitality | 2023 |
| Give UP Art Limited | Professional & scientific | 2010 |
| GJ Global Ltd | Professional & scientific | 2004 |