| GH Motortec Consultants Ltd | Other services | 2012 |
| GH Studios Ltd | Professional & scientific | 2020 |
| Ghaaa Ltd | Other services | 2024 |
| Gharakhani Ltd | Health & social care | 2022 |
| GHC Building & Civil Engineering Ltd | Construction | 2010 |
| Gheorghiu Developments Limited | Construction | 2012 |
| Ghislandi & Gutenberg Ltd | Information & communication | 2020 |
| GIACOMETTI7 Limited | Real estate | 2026 |
| Gibbons Property Investments Ltd | Real estate | 2014 |
| Gibbs Close Property Limited | Real estate | 2025 |
| Gidama Ltd | Health & social care | 2021 |
| Gideon Summerfield Limited | Arts & recreation | 2026 |
| Gift Girl Limited | Administrative & support | 2015 |
| Giga Bygg Ltd | Construction | 2025 |
| Giggabox Limited | Information & communication | 2016 |
| Gigsell Limited | Administrative & support | 2011 |
| Gilgrove Limited | Wholesale & retail | 1972 |
| Gills Court Residence Co. Limited | Households | 2001 |
| Gimme 4 Limited | Administrative & support | 2017 |
| Gingerbeard Developments Ltd | Administrative & support | 2014 |
| Gingerbrook Limited | Real estate | 2007 |
| Gino D'Acampo Holdings Ltd | Financial services | 2019 |
| Gino D'Acampo Limited | Other services | 2012 |
| Giordani Ltd | Real estate | 2018 |
| Giorgi Contractor Ltd | Construction | 2015 |
| Giorgio Products Ltd | Other services | 2010 |
| Giosprite Limited | Information & communication | 2000 |
| Giuseppes Place Ltd | Hospitality | 2019 |
| Giving Hands | Health & social care | 2015 |
| Gjan Ltd | Real estate | 2023 |
| Gjoka Scaffolding Ltd | Construction | 2020 |
| Gjorllaku Construction Services Limited | Construction | 2025 |
| Gjou Ltd | Manufacturing | 2023 |
| GJW Consultancy Services Limited | Health & social care | 2007 |
| Gkap Limited | Administrative & support | 2024 |
| Gkvnp Care Ltd | Health & social care | 2023 |
| Gkvnp Investment Ltd | Real estate | 2025 |
| GL Ecolight Ltd | Wholesale & retail | 2019 |
| GL Indexes Limited | Administrative & support | 2025 |
| GL Leisure Services Ltd | Construction | 2022 |
| Gladshire Group Limited | Real estate | 2021 |
| Glam Mode Ltd | Wholesale & retail | 2020 |
| Glanton Pyke Holdings Limited | Real estate | 2022 |
| Glanton Pyke Limited | Hospitality | 2022 |
| Glasgow Capital Limited | Professional & scientific | 2013 |
| Glasgow Land Investment Ltd | Real estate | 2010 |
| Glasgow Xsite Ltd | Professional & scientific | 2023 |
| Glasstec Automotive Limited | Wholesale & retail | 2005 |
| Glcg Holdings Limited | Financial services | 2025 |
| Gleanrite Ltd | Administrative & support | 2011 |
| Glebelands Close RTM Company Limited | Households | 2020 |
| Glendale Lodge Care Limited | Health & social care | 2024 |
| Glendale Lodge Property Limited | Real estate | 2024 |
| Glenlyn Group LLP | | 2019 |
| Glenlyn Hotel Ltd | Hospitality | 2013 |
| Glennarlin Killo Ltd | Construction | 2018 |
| Glenthorne Construction Limited | Construction | 2012 |
| Global Airlift Solutions Ltd | Transport & logistics | 2019 |
| Global Asset Tracking Limited | Professional & scientific | 2009 |
| Global Auto ID Limited | Information & communication | 2008 |
| Global Design & Language Solutions Limited | Professional & scientific | 2008 |
| Global Edge Trading Ltd | Wholesale & retail | 2026 |
| Global Food Consultancy Limited | Professional & scientific | 2009 |
| Global Football Academy London Limited | Administrative & support | 2018 |
| Global Grains & Foods Limited | Administrative & support | 2015 |
| Global Host Centre Ltd | Information & communication | 2020 |
| Global Insights Group Limited | Administrative & support | 2017 |
| Global Insurance Consultancy Limited | Financial services | 1993 |
| Global Marine Support Ltd | Manufacturing | 2013 |
| Global NET News Ltd | Administrative & support | 2012 |
| Global Research & Innovation Centre (UK) Limited | Wholesale & retail | 2012 |
| Global Tax Training Limited | Extraterritorial | 2018 |
| Global Trade Expert Ltd | Wholesale & retail | 2021 |
| Globalcert Group Ltd | Professional & scientific | 2020 |
| Globaled Strategies Limited | Administrative & support | 2024 |
| Globelex Associates Ltd | Wholesale & retail | 2024 |
| Globemed Affairs Limited | Professional & scientific | 2025 |
| Globepack Asset Management Limited | Wholesale & retail | 2023 |
| Globepack Equipment Ltd | Wholesale & retail | 2016 |
| Globnk UK Ltd | Administrative & support | 2025 |
| Glocal Foods Limited | Wholesale & retail | 2015 |
| Glorior Ltd | Construction | 2015 |
| Glory Paradise Ltd | Health & social care | 2017 |
| Gloss Hair Limited | Other services | 2017 |
| Gloucester QC Capital Limited | Hospitality | 2025 |
| Gloveday Limited | Real estate | 2020 |
| Glow Theory Ltd | Other services | 2025 |
| Glowriant Aesthetics Ltd | Other services | 2025 |
| Glyn Avenue (Barnet) Management Company Limited | Households | 1988 |
| Glyn-Y-Mor Management Company Limited | Households | 2013 |
| Glynn Vivian Miner's Mission(Incorporated 1906)(THE) | Health & social care | 1906 |
| GM JAY Ltd | Real estate | 2014 |
| GM MED Ltd | Administrative & support | 2012 |
| Gmrn Consultants Limited | Real estate | 2012 |
| GNH London Ltd | Real estate | 2011 |
| Gnome Inc Limited | Professional & scientific | 2020 |
| Go Genius Limited | Education | 2022 |
| Go to Consultants Limited | Professional & scientific | 2016 |
| GO2CLINIC Limited | Health & social care | 2019 |
| Goat Investments Limited | Real estate | 2017 |