| Genderforce C.I.C. | Administrative & support | 2012 |
| Generation Edge 360 Limited | Professional & scientific | 2011 |
| Generation Edge Limited | Professional & scientific | 2017 |
| Genesis IT Consultancy Services Limited | Information & communication | 2018 |
| Genesis Property Developers Ltd | Construction | 2019 |
| Genius Electric & Compliance Ltd | Construction | 2019 |
| Genivo AI Ltd | Information & communication | 2025 |
| Genosphere Ltd | Information & communication | 2022 |
| Genovate Limited | Administrative & support | 2025 |
| Genovate Solutions Limited | Administrative & support | 2026 |
| GEO Fencing Ltd | Construction | 2022 |
| Georgian Opinion Research Business International Limited | Professional & scientific | 1997 |
| Geraa Ltd | Wholesale & retail | 2026 |
| Gerent Limited | Real estate | 2014 |
| GF Holdings 1 Ltd | Wholesale & retail | 2019 |
| Gghd Properties Ltd | Real estate | 2021 |
| Ghar Limited | Financial services | 2018 |
| Ghazal & SON Ltd | Real estate | 2023 |
| Ghedia Consultancy Limited | Professional & scientific | 2018 |
| Giar UK Ltd | Wholesale & retail | 2020 |
| Gibbons Construction Limited | Construction | 2010 |
| Gibbons Premier Homes Ltd | Real estate | 2016 |
| Gibbs Gillespie Surveyors Limited | Professional & scientific | 1995 |
| Gibsonstarr Limited | Administrative & support | 2009 |
| Gigantic Venture Ltd | Information & communication | 2011 |
| Giggles & Gatherings Ltd | Hospitality | 2023 |
| Gilbert and George Limited | Arts & recreation | 1984 |
| Gilco Construction Ltd | Construction | 2023 |
| Ginacocolouise Ltd | Wholesale & retail | 2023 |
| Giovaruscio Celestino Transport Limited | Transport & logistics | 2003 |
| Giriraj Holdings Ltd | Real estate | 2025 |
| Giriraj Property Ltd | Real estate | 2025 |
| Giulia & Giulietta Cars-Parts Limited | Wholesale & retail | 2018 |
| Gizme Limited | Information & communication | 2001 |
| GJ Templeman Solicitors Limited | Professional & scientific | 2010 |
| GJP Alexandria Limited | Real estate | 2011 |
| GJP Rigg Limited | Information & communication | 2024 |
| GK OIL Ltd | Professional & scientific | 2015 |
| GK Properties Limited | Real estate | 2016 |
| GK-12 Ltd | Administrative & support | 2014 |
| GK10 Ltd | Real estate | 2019 |
| Glad Field Ltd | Real estate | 2012 |
| Gladerest Limited | Real estate | 1991 |
| Glades Construction Ltd | Construction | 2013 |
| Gladestar Limited | Administrative & support | 2001 |
| Gladsdale Estates Limited | Administrative & support | 1983 |
| Glass Full Ltd | Wholesale & retail | 2024 |
| Glasshouse 2016 Limited | Hospitality | 2016 |
| Glasskeys (London) Limited | Real estate | 2019 |
| Glassland Ltd | Manufacturing | 2026 |
| Glassy Junction (UK) Limited | Real estate | 2006 |
| Glaze & Shade Ltd | Construction | 2026 |
| Gleeson Commercial Consultancy Limited | Professional & scientific | 2013 |
| Glen Milis Limited | Information & communication | 2019 |
| Glenmead Consulting Limited | Information & communication | 2015 |
| Glenniris Limited | Financial services | 2019 |
| Glens Group Limited | Wholesale & retail | 2016 |
| Global Development Projects Company Ltd | Construction | 2024 |
| Global Equity Ltd | Real estate | 2019 |
| Global Forum on Nicotine Limited | Professional & scientific | 2014 |
| Global Organizational Integrators Ltd | Professional & scientific | 2019 |
| Global Talent Advisory UK Ltd | Professional & scientific | 2026 |
| Global Transformation Services Ltd | Information & communication | 2021 |
| Globaya Limited | Information & communication | 2018 |
| Globe Accountancy Services Limited | Professional & scientific | 2011 |
| Globe Foods Northern Ltd | Wholesale & retail | 2023 |
| Globe Foods UK Ltd | Wholesale & retail | 2004 |
| Globe Imports Limited | Wholesale & retail | 1970 |
| Globe Project Services Ltd | Construction | 2015 |
| Globelink (Imports) Limited | Real estate | 1986 |
| Glorious Crown Limited | Professional & scientific | 2003 |
| Glory Gems Limited | Other services | 2022 |
| GLT Services Limited | Information & communication | 1995 |
| GM Heating Supplies UK Ltd | Wholesale & retail | 2024 |
| GM HTM Limited | Wholesale & retail | 2018 |
| GNM Investments Ltd | Real estate | 2011 |
| Gnrec Ltd | Administrative & support | 2025 |
| Go Impact Solutions Ltd | Professional & scientific | 2024 |
| Go Managed Ltd | Information & communication | 2021 |
| Godimar Engineers Ltd | Professional & scientific | 2017 |
| Godwit Investments Ltd | Real estate | 2018 |
| Goenka Jewels Limited | Wholesale & retail | 2023 |
| Gokul Sweets & Savouries Ltd | Hospitality | 2022 |
| Gold Living Estates Ltd | Real estate | 2022 |
| Gold Hill Topco Ltd | Real estate | 2019 |
| Gold Star London Ltd | Wholesale & retail | 2025 |
| Goldbridge Innovations Limited | Information & communication | 1995 |
| Goldcraft Fine Foods Ltd | Hospitality | 2024 |
| Golden Cross Service Station LLP | | 2009 |
| Golden Flute Enterprises Ltd | Administrative & support | 2018 |
| Golden Key Careers Limited | Other services | 2023 |
| Goldenceylonspice Ltd | Wholesale & retail | 2026 |
| Goldmead Limited | Real estate | 2013 |
| Goldmine Brewing Ltd | Manufacturing | 2025 |
| Gondalz Express Ltd | Wholesale & retail | 2026 |
| Good Cost Apartments Ltd | Real estate | 2018 |
| Good Cost Properties Ltd | Real estate | 2017 |
| Good Harvest Group Limited | Real estate | 1996 |
| Good Harvest Limited | Real estate | 1996 |
| Good Harvest Properties (Aylesbury) Limited | Real estate | 1999 |