| GHL ELG Solar Limited | Administrative & support | 2023 |
| GHL Taskcove 2 Limited | Construction | 2021 |
| GHL Trinity Square GP Limited | Administrative & support | 2011 |
| GHL Trinity Square LP | | 2011 |
| Ghost LAB Development Ltd | Manufacturing | 2025 |
| GI GI Charters Ltd | Transport & logistics | 2016 |
| Giardina Properties Limited | Real estate | 2017 |
| Gichev Comms Limited | Information & communication | 2012 |
| Gidea Holdings Limited | Professional & scientific | 2006 |
| Gifted GEM Limited | Health & social care | 2015 |
| Giglbee Ltd | Wholesale & retail | 2023 |
| Gilchrist Real Estate Ltd | Real estate | 2021 |
| Gillard Bespoke Limited | Construction | 2006 |
| Gilly Limited | Other services | 2023 |
| Gilsmith Ltd | Construction | 2010 |
| Ginger Global (UK) 2021 Limited | Real estate | 2020 |
| Gioia Capital Limited | Financial services | 2020 |
| Girnar Valley Farm Ltd | Wholesale & retail | 2025 |
| Gisborne Limited | Professional & scientific | 2012 |
| Givehand Group Limited | Administrative & support | 1996 |
| Givehand Limited | Construction | 1979 |
| Giws Associates Limited | Construction | 2013 |
| GK Maintenance Ltd | Construction | 2025 |
| GK Multitrade Limited | Wholesale & retail | 2021 |
| Gkfo Ltd. | Professional & scientific | 2012 |
| GKK Kebab Ltd | Hospitality | 2024 |
| GL5 Associates Ltd | Hospitality | 2024 |
| GL5 Investments Ltd | Hospitality | 2024 |
| GLA Marketing Limited | Professional & scientific | 2025 |
| Gladstone Court Developments Limited | Administrative & support | 2012 |
| Gladstone Holdings Limited | Construction | 2016 |
| Gladstone Personal Security Limited | Other services | 2019 |
| Gladstone Rise (Block C) Management Company Limited | Households | 1989 |
| Gladwell Group Ltd | Construction | 2019 |
| Glass Contain Ltd | Manufacturing | 2025 |
| Glass Jigsaw Ltd. | Manufacturing | 2011 |
| Glave Cleaning Ltd | Administrative & support | 2025 |
| Global Circle Accountancy Ltd | Professional & scientific | 2023 |
| Global Delivery Xpress Limited | Administrative & support | 2005 |
| Global LUX Estate Ltd | Real estate | 2024 |
| Global Rendering & Plastering Ltd | Construction | 2017 |
| Global Rendering Ltd | Construction | 2025 |
| Global Wardrobes Ltd | Construction | 2017 |
| Globalresort Limited | Real estate | 2006 |
| Globelle Travels International Ltd | Information & communication | 2015 |
| Gloucester Road Ltd | Real estate | 2020 |
| Glow Longevity Ltd | Other services | 2025 |
| Glow Productions Limited | Information & communication | 2018 |
| GLS Accounting Limited | Professional & scientific | 2009 |
| GMA Properties Limited | Real estate | 2020 |
| GMD London Ltd | Construction | 2015 |
| GMD Mastics Ltd | Construction | 2022 |
| GMM Entertainment Ltd | Arts & recreation | 2023 |
| GMR (Enfield) LLP | | 2006 |
| GN Letting Ltd | Real estate | 2022 |
| Gngneering Ltd | Construction | 2017 |
| GNI Construction Management Ltd | Professional & scientific | 2014 |
| Go 2 Girl Limited | Administrative & support | 2015 |
| Go Consultancy Services Ltd | Professional & scientific | 2026 |
| Go Crepe Ltd | Hospitality | 2020 |
| Go&S JV Limited | Administrative & support | 2023 |
| GOD of Glory Christian Ministries Limited | Other services | 2011 |
| Goher Construction and Design Ltd | Construction | 2023 |
| Goktepe Ltd | Professional & scientific | 2021 |
| Gokwell Ltd | Wholesale & retail | 2025 |
| Gold Standard Personal Training Ltd. | Arts & recreation | 2013 |
| Golden Bites (Fish and Chips) Ltd | Manufacturing | 2025 |
| Golden Oak Care Ltd | Health & social care | 2025 |
| Golden Triangle Enterprises Ltd | Transport & logistics | 2020 |
| Goldenmill Limited | Construction | 2000 |
| Golg Media Limited | Extraterritorial | 2024 |
| Gondal Foundation | Education | 2007 |
| Good Neighbour Venues Ltd | Professional & scientific | 2017 |
| Goodmayes 19 Limited | Administrative & support | 2008 |
| Goodmayes 28 Limited | Administrative & support | 2008 |
| Goodmayes Holdings Limited | Administrative & support | 2008 |
| Gopc Operations Limited | Other services | 2020 |
| Gorbro Property 1 Limited | Real estate | 2023 |
| Gorbro Property Limited | Real estate | 2022 |
| Goturkishfood Ltd | Wholesale & retail | 2019 |
| Gough Builders Limited | Construction | 2007 |
| Gourmet Kebab Kitchen Ltd | Hospitality | 2017 |
| GP UK Property Investments Limited | Real estate | 2011 |
| GPH IT Solutions Ltd | Information & communication | 2019 |
| Grace Wilde Hair Limited | Other services | 2025 |
| Gradient Health Analytics Ltd | Professional & scientific | 2020 |
| Grafters Painting and Decorating Service Limited | Construction | 2021 |
| Grand Union Place (Hackney) Management Company Limited | Households | 1994 |
| Grange Court Management Co. (Loughton) Limited | Real estate | 1985 |
| Granitevale Services Ltd | Construction | 2025 |
| Grant a Smile Community Interest Company | Administrative & support | 2017 |
| Grant Express PVT Ltd | Wholesale & retail | 2023 |
| Grant Tanner Limited | Construction | 2015 |
| Granville Construction Company Limited | Administrative & support | 1988 |
| Granville Technical Services (East) Limited | Administrative & support | 2009 |
| Graphexel Limited | Wholesale & retail | 2009 |
| Graviton Energy Limited | Professional & scientific | 2022 |
| Grealem Properties Limited | Construction | 1970 |
| Great Cambridge Road Developments Ltd | Real estate | 2024 |
| Greathead Limited | Professional & scientific | 2012 |