| G N K Investments Limited | Real estate | 2015 |
| G P U Consultants Limited | Construction | 2016 |
| G S N Property Services Ltd | Real estate | 2018 |
| G Safety Ltd | Education | 2016 |
| G&G Waste Removal Ltd | Water & waste | 2022 |
| G-Bikes Co Limited | Construction | 2014 |
| G.A.S Consulting Limited | Wholesale & retail | 2020 |
| G2L LLP | | 2024 |
| G3P Limited | Professional & scientific | 2018 |
| Gacl Pro Limited | Financial services | 2024 |
| Gada Limited | Real estate | 1993 |
| Galawasp Ltd | Wholesale & retail | 2022 |
| Galo Services Ltd | Hospitality | 2019 |
| Galopar Marketing Limited | Professional & scientific | 2017 |
| Gamaway Limited | Manufacturing | 1992 |
| Game Forge Ltd | Education | 2025 |
| GANADOR&M2 Limited | Hospitality | 2019 |
| Gandhi Trading & Investments Ltd | Real estate | 2024 |
| Ganesh Family Limited | Real estate | 2022 |
| Garden Care Group Ltd | Administrative & support | 2025 |
| Garrett Motors Limited | Wholesale & retail | 2005 |
| Garry Fenton Electrical Limited | Construction | 2004 |
| Gary Lewis Consulting Limited | Professional & scientific | 2020 |
| Gary M Smith Limited | Administrative & support | 2011 |
| Gatewill Limited | Administrative & support | 2016 |
| Gator Solutions Limited | Information & communication | 2013 |
| Gayatri Properties Ltd | Real estate | 2018 |
| Gazelle Travel Limited | Administrative & support | 1980 |
| GB Adviser London Ltd. | Financial services | 2015 |
| Gear Uppa! Ltd | Administrative & support | 2025 |
| Gemstone Gardens Limited | Administrative & support | 2009 |
| Gencoe Properties Limited | Construction | 2006 |
| Gencore Limited | Professional & scientific | 2002 |
| Gencore Solutions Ltd | Information & communication | 2024 |
| Gentlecraft Limited | Construction | 1991 |
| Geofirma Ltd | Professional & scientific | 2009 |
| George's Kitchen Limited | Hospitality | 2014 |
| Gerrards Cross Orthodontics Ltd | Health & social care | 2013 |
| Gertie Films Ltd | Information & communication | 2021 |
| Getthingstone Capital Limited | Financial services | 2025 |
| Ggar Consultants Ltd. | Real estate | 2012 |
| Ghelani Properties Limited | Real estate | 2017 |
| Giftbox International Limited | Information & communication | 2016 |
| Glaredawn Properties Ltd | Real estate | 2002 |
| Glasdent Ltd | Health & social care | 2026 |
| Gleampoint Limited | Real estate | 2003 |
| Glenshee Close Limited | Households | 1986 |
| Global Asset Consultants Limited | Financial services | 2013 |
| Global Asset Holdings Limited | Real estate | 2026 |
| Global IT House Ltd | Information & communication | 2014 |
| Global Sourced Solutions Limited | Wholesale & retail | 2007 |
| Globe Court Wormley Management (1991) Limited | Real estate | 1991 |
| Globetranet Limited | Information & communication | 2009 |
| Globex Investments Ltd | Real estate | 2018 |
| Gmcl Limited | Professional & scientific | 2019 |
| GNC Property Limited | Real estate | 2020 |
| Go City Apartments Limited | Real estate | 2012 |
| Goal Properties Ltd | Real estate | 2023 |
| Gold Leaf Security Ltd | Administrative & support | 2024 |
| Gold Leaf Security Services Limited | Administrative & support | 2026 |
| Gold-In Properties Limited | Real estate | 2012 |
| Gold-In UK Ltd | Financial services | 2018 |
| Goldbond Investments Limited | Real estate | 1998 |
| Golden Door Development Ltd | Real estate | 2021 |
| Golden Intelligence Solutions Ltd | Manufacturing | 2024 |
| Golden Oak Properties Ltd | Financial services | 2018 |
| Golden Opportunities Real Estate & Investments Ltd. | Financial services | 2019 |
| Goldenage Healthcare Limited | Health & social care | 2010 |
| Goldstatus Technology Limited | Real estate | 1995 |
| Gole Solutions Limited | Professional & scientific | 2018 |
| Gondal Ventures Ltd | Professional & scientific | 2021 |
| Gondwana Tours & Safaris Ltd | Administrative & support | 2017 |
| Good 4 U Ltd | Wholesale & retail | 2022 |
| Good Home Property Ltd | Real estate | 2024 |
| Good Repairs Ltd | Wholesale & retail | 2017 |
| Goose Lane Estate Management Company Limited | Households | 2023 |
| Gopi Properties Ltd | Real estate | 2019 |
| Gordo Property Ltd | Real estate | 2024 |
| Gortmore Construction Limited | Construction | 2018 |
| Gortmore Limited | Construction | 2019 |
| Gortmore LP Holdings Limited | Financial services | 2024 |
| GOS GAS Limited | Construction | 2021 |
| Goughbuild UK Limited | Construction | 2002 |
| Gowers Plus Limited | Professional & scientific | 2014 |
| Gr&Ir Construction Limited | Construction | 2024 |
| GR8 Motors Limited | Wholesale & retail | 2013 |
| Grace Gears Limited | Wholesale & retail | 2021 |
| Gracechurch Risk Solutions Limited | Financial services | 2016 |
| Gracechurch Sports Management Limited | Construction | 2002 |
| Graffa Ltd | Professional & scientific | 2011 |
| Grande Wines Limited | Wholesale & retail | 2010 |
| Grantspace Ltd | Hospitality | 2009 |
| Grass Consulting Ltd | Professional & scientific | 2017 |
| Grass Development Ltd | Construction | 2012 |
| Great East Ltd | Real estate | 2016 |
| Green Energy Metals Ltd | Mining & quarrying | 2024 |
| Green Hybrid Energy Limited | Professional & scientific | 2021 |
| Green Lane Northwood (Management) Company Limited | Households | 2006 |
| Green Lining Limited | Wholesale & retail | 2021 |
| Greenacres Property Investments LLP | | 2017 |