| G. Husdup Constructions Limited | Construction | 2017 |
| G.A.D Plumbing and Heating Ltd | Construction | 2015 |
| G.S.A. Investments Ltd | Other services | 2010 |
| GA & P Properties Limited | Construction | 2021 |
| GA Jewellery Shop Ltd | Wholesale & retail | 2025 |
| GA Private Sourcing Ltd | Real estate | 2026 |
| Gabi Rail Ltd | Construction | 2017 |
| Gabikeri Limited | Transport & logistics | 2015 |
| Gactg Ltd | Construction | 2020 |
| Gadgets Exchange Ltd | Wholesale & retail | 2025 |
| Gadikar Holdings Limited | Real estate | 2025 |
| Gaftronex Limited | Professional & scientific | 2013 |
| Gage Ridge Limited | Wholesale & retail | 2022 |
| Gaia Film Production Limited | Information & communication | 2024 |
| Gaia Studio London Limited | Construction | 2026 |
| Gaisgill Freehold Limited | Households | 2024 |
| Gaisgill RTM Company Limited | Households | 2025 |
| Galaxy Chauffeur Ltd | Transport & logistics | 2025 |
| Galaxy Engineering Ltd | Construction | 2007 |
| Galaxy Health & Safety Ltd | Professional & scientific | 2019 |
| Galeco Trading Ltd | Wholesale & retail | 2019 |
| Gallagher GM Limited | Households | 2025 |
| Gallagher Property Solutions Limited | Professional & scientific | 2025 |
| Galleymore Ltd | Extraterritorial | 2011 |
| Galore Entity Ltd | Wholesale & retail | 2021 |
| Game Odyssey Ltd | Other services | 2006 |
| Game of Tw'Elves Limited | Information & communication | 2020 |
| GAN Gila Ltd | Health & social care | 2021 |
| GAN Menachem Hendon Limited | Education | 2011 |
| Ganeev Treasure Enterprise Limited | Transport & logistics | 2026 |
| Ganton Plus Limited | Administrative & support | 2017 |
| Ganvaro Ltd | Construction | 2024 |
| Garden City Property Management Ltd | Real estate | 2020 |
| Garden Genius Ltd | Arts & recreation | 2024 |
| Garden Pro (London) Limited | Administrative & support | 2023 |
| Gardeninc Ltd | Administrative & support | 2025 |
| Gardens by John Dwyer Limited | Administrative & support | 2018 |
| Gardna Limited | Information & communication | 2025 |
| Garrulu Limited | Extraterritorial | 2020 |
| Garry Food and Wine Ltd | Wholesale & retail | 2019 |
| Garter Properties Limited | Construction | 2013 |
| GAS Checkers Ltd | Administrative & support | 2016 |
| Gate Restaurants Limited | Hospitality | 2021 |
| Gateway Supported Living Ltd | Health & social care | 2025 |
| Gathani Holdings Limited | Financial services | 1985 |
| Gattuson Limited | Information & communication | 2022 |
| Gavin Investments Limited | Real estate | 2006 |
| Gayton Road Properties Limited | Real estate | 2017 |
| Gaywand Limited | Other services | 1964 |
| GAZ Fourniture Paiement Ltd | Wholesale & retail | 2025 |
| GB & SG Property Holdings Ltd | Construction | 2017 |
| GB Contractors Ltd | Construction | 2013 |
| GB Lock & Key Ltd. | Administrative & support | 2008 |
| GB Piping Solutions Ltd | Professional & scientific | 2021 |
| GB Vehicles Ltd | Wholesale & retail | 2025 |
| Gbart Services Ltd | Manufacturing | 2024 |
| GBK Consulting Ltd | Public administration | 2023 |
| GBR Yachts Management Limited | Manufacturing | 2022 |
| Gbulash Cigars Ltd | Wholesale & retail | 2025 |
| Gcacs Properties Ltd | Real estate | 2020 |
| Gcmsb Limited | Construction | 2018 |
| GD Security London Ltd | Administrative & support | 2021 |
| Gdba Ltd | Administrative & support | 2021 |
| GDC Nero Limited | Other services | 2012 |
| Gebryil Accounting Ltd | Professional & scientific | 2006 |
| Gedi Civil Engineering Ltd | Construction | 2024 |
| Geds Electrical Solutions Ltd | Construction | 2025 |
| Geeky Exchange Walworth Ltd | Other services | 2022 |
| Geekybee Limited | Information & communication | 2019 |
| Geeman Autos Ltd | Wholesale & retail | 2018 |
| Geff Cori Ltd | Wholesale & retail | 2021 |
| Gelupolrom Security Ltd | Administrative & support | 2025 |
| GEM Events & Consultancy Ltd | Professional & scientific | 2020 |
| GEM Mechanical Ltd | Construction | 2019 |
| GEM Moda Limited | Wholesale & retail | 2023 |
| GEM Tech Consultancy Ltd | Information & communication | 2019 |
| Gemini Exports Limited | Wholesale & retail | 2008 |
| Gemini Futures Limited | Real estate | 2024 |
| Gemini Managment Limited | Real estate | 2015 |
| Gemma Doku Ltd | Wholesale & retail | 2013 |
| Gemrent Properties Limited | Real estate | 1992 |
| Gems and Stones Ltd | Wholesale & retail | 2021 |
| Gems of the World (Europe) Limited | Wholesale & retail | 1990 |
| Generaize Limited | Information & communication | 2019 |
| General Construction Activities Ltd | Construction | 2022 |
| General Electrical Ltd | Construction | 2021 |
| General Medical Practice Limited | Health & social care | 2015 |
| Generik Ltd | Information & communication | 2010 |
| Genesis Nova Ltd | Administrative & support | 2026 |
| Genesis Training Services Limited | Professional & scientific | 2009 |
| Geneva Estates Ltd | Wholesale & retail | 2024 |
| Genii Logistics Ltd | Transport & logistics | 2025 |
| Genimpex Trading Limited | Wholesale & retail | 2010 |
| Genius Velo Limited | Professional & scientific | 2013 |
| Geniusgemstutoring Limited | Education | 2021 |
| GEO DC Ltd | Construction | 2026 |
| GEO Rail Limited | Construction | 2016 |
| George Baker Music Limited | Arts & recreation | 2022 |
| George James Consultancy Limited | Professional & scientific | 2014 |
| George Robu Interiors Ltd | Construction | 2021 |