| George Claremont Limited | Professional & scientific | 2007 |
| George Road (Kingston) Management Company Limited | Households | 1996 |
| George's PRE School Limited | Health & social care | 2009 |
| Georgi Drylining Ltd | Construction | 2011 |
| Georgia Energy Limited | Energy | 2019 |
| Gerald House Limited | Real estate | 2020 |
| GET Better Books Ltd | Professional & scientific | 2021 |
| Gflightlab Limited | Manufacturing | 2019 |
| GFS Solutions Ltd | Professional & scientific | 2010 |
| GGE UK 1 Limited | Financial services | 2015 |
| GGE UK 2 Limited | Financial services | 2015 |
| Ghallow Enterprises Limited | Wholesale & retail | 2026 |
| Ghraoui Ltd | Professional & scientific | 2019 |
| Giant Peach Group Ltd | Information & communication | 2019 |
| Giant Vending Ltd | Wholesale & retail | 2026 |
| Giatech Limited | Information & communication | 2025 |
| Gibbon Professional Limited | Health & social care | 2010 |
| Gibson Lane Limited | Real estate | 2005 |
| Gilano Ltd | Information & communication | 2024 |
| Gilbert Building Services Limited | Administrative & support | 2002 |
| Giles Pilbrow Limited | Professional & scientific | 2012 |
| Gillee Consulting Limited | Professional & scientific | 2024 |
| Ginger Dog Homes Ltd | Construction | 2017 |
| Gingerbread Consulting Limited | Professional & scientific | 2007 |
| Gipson Consulting Limited | Professional & scientific | 2010 |
| Gisa Sikdang Ltd | Hospitality | 2025 |
| GKB Ventures Ltd | Professional & scientific | 2015 |
| Gladcall Limited | Real estate | 2016 |
| Glading Property Investments Ltd | Real estate | 2024 |
| Glamsoul Aesthetics Clinic Limited | Other services | 2022 |
| Glamsoul Beauty Limited | Other services | 2020 |
| Glara Property Ltd | Real estate | 2023 |
| Glasgow Chiropractic Limited | Health & social care | 2004 |
| Glass & Facade Solutions Limited | Other services | 2013 |
| Glass on Time Limited | Construction | 2020 |
| Glasshouse Logistics Ltd | Transport & logistics | 2023 |
| Glassmill Limited | Professional & scientific | 1994 |
| Glebe Court (Guildford) Residents Association Limited | Households | 1960 |
| Glendon Lodge Management Company Limited | Real estate | 2012 |
| Glenise Technologies Limited | Information & communication | 2012 |
| Glenn Dunbar Photographic Limited | Professional & scientific | 2020 |
| Glenville Advisory Ltd | Professional & scientific | 2021 |
| Glenwood Bespoke Ltd | Manufacturing | 2026 |
| Glenwood Homes (Cobham) Limited | Real estate | 2023 |
| Glenwood Homes (Como House) Limited | Real estate | 2026 |
| Glenwood Homes (Cricket Way) Limited | Real estate | 2023 |
| Glenwood Homes (Steels Lane) Limited | Real estate | 2026 |
| Glenwood Homes (Surbiton) Limited | Real estate | 2023 |
| Glenwood Homes (UPR) Limited | Construction | 2018 |
| Glenwood Homes (Water Lane) Limited | Real estate | 2026 |
| Glenwood Homes Copsem Court Limited | Real estate | 2022 |
| Glenwood Homes Limited | Construction | 2010 |
| Glenwood Investments Limited | Real estate | 2021 |
| Glenwood Residential Limited | Real estate | 2021 |
| Glenwood Road Management Company Limited | Households | 2007 |
| GLM Construction Limited | Construction | 2024 |
| Glob-Local Sport Solutions Ltd | Arts & recreation | 2014 |
| Global 32 Ltd | Wholesale & retail | 2021 |
| Global Directors Forum Limited | Professional & scientific | 2005 |
| Global Foods Distribution Limited | Wholesale & retail | 2026 |
| Global Interpreters Limited | Professional & scientific | 2025 |
| Global IT NET Ltd | Wholesale & retail | 1997 |
| Global Medical Services Limited | Health & social care | 2023 |
| Global Preservation Strategies Limited | Financial services | 2010 |
| Global Rise CIC | Education | 2011 |
| Global Simulation Ltd | Administrative & support | 2023 |
| Global Sourcing LT Limited | Wholesale & retail | 2018 |
| Global Sports Strategies Ltd | Information & communication | 2019 |
| Global Study AI Ltd | Education | 2025 |
| Global Sustainable Sport Limited | Information & communication | 2021 |
| Global Venture Consulting Limited | Information & communication | 2018 |
| Global Workforce Synergy Ltd | Administrative & support | 2020 |
| GLOBAL32 Construction Ltd | Construction | 2021 |
| Globalnex Limited | Information & communication | 2025 |
| Globalsportsdata Ltd | Information & communication | 2018 |
| Glomodus Limited | Information & communication | 2015 |
| Glondonim Limited | Information & communication | 2019 |
| Glow Group Limited | Financial services | 2024 |
| Glow UP at 40 Plus Limited | Information & communication | 2025 |
| GLY Junior Ltd | Real estate | 2016 |
| GM Construction (London) Ltd | Energy | 2013 |
| GMB Bevan Limited | Information & communication | 2018 |
| GMK Pepper Holdings Limited | Professional & scientific | 2012 |
| GMK Projects Limited | Construction | 2023 |
| Gmsquare Ltd | Construction | 2022 |
| Gnar Software Ltd | Information & communication | 2022 |
| Gnomad Limited | Construction | 2026 |
| Go for Gifts Limited | Administrative & support | 2013 |
| Go Go Fresh UK Ltd | Hospitality | 2012 |
| Go Prompt Ltd | Information & communication | 2023 |
| Go Wireless Ltd | Wholesale & retail | 2016 |
| Goalside Limited | Wholesale & retail | 2023 |
| Goddard Consulting Construction Services Limited | Administrative & support | 2008 |
| Goddard Consulting LLP | | 2009 |
| Gogreen Business and Trade Limited | Financial services | 2025 |
| Gold Telecom Limited | Information & communication | 1998 |
| Goldclipper Holdings Limited | Financial services | 2021 |
| Golden Connect Ltd | Wholesale & retail | 2015 |
| Golden Cores Resources Limited | Administrative & support | 2021 |
| Golden Orchard Investments Limited | Real estate | 2011 |