| Graden Services Limited | Professional & scientific | 2011 |
| Gradiant UK Ltd | Water & waste | 1999 |
| Graham Services Limited | Administrative & support | 2005 |
| Grainline Store Ltd | Wholesale & retail | 2025 |
| Grammar Homes Limited | Construction | 2024 |
| Grand Prix Karting Limited | Arts & recreation | 1992 |
| Grand Supplies Ltd | Wholesale & retail | 2023 |
| Grant N Consulting Ltd | Professional & scientific | 2023 |
| Grantcloud Limited | Information & communication | 2025 |
| Grapeapps Ltd | Information & communication | 2013 |
| Graphic Design Supplies Limited | Wholesale & retail | 1998 |
| Graphicswork Limited | Professional & scientific | 2008 |
| Grasshoppers (Surrey) Limited | Professional & scientific | 1996 |
| Grasslands and Savannah Limited | Manufacturing | 1996 |
| Gravitas 76 Ltd | Professional & scientific | 2017 |
| Gravitas CFO Limited | Professional & scientific | 2026 |
| Graycon Consulting Limited | Wholesale & retail | 2015 |
| Graylands Farm Barns Residents Company Limited | Households | 2016 |
| Great Edge Ltd | Other services | 2020 |
| Great English Property Limited | Real estate | 2017 |
| Great With Talent Limited | Professional & scientific | 2003 |
| Greaves Design Limited | Information & communication | 2010 |
| Greek Gyros Spot Limited | Hospitality | 2026 |
| Green Aggregates Limited | Construction | 2010 |
| Green Hydrogen Solutions Ltd | Administrative & support | 2020 |
| Green Life Horsham Ltd | Manufacturing | 2025 |
| Green Life Science Recruitment Limited | Administrative & support | 2024 |
| Green Shift Technologies Ltd | Financial services | 2023 |
| Green Tech Holdings Ltd | Professional & scientific | 2017 |
| Green's Heating and Plumbing Limited | Construction | 2019 |
| Greenbuild Design & Construction Limited | Construction | 2021 |
| Greenedge Grounds Maintenance Ltd | Administrative & support | 2025 |
| Greener Energy Heating Limited | Construction | 2011 |
| Greener Than B4 Ltd | Construction | 2022 |
| Greenfinch Consulting Ltd | Professional & scientific | 2022 |
| Greenhill Securities (Developments) Limited | Construction | 1973 |
| Greenpark Imaging Solutions Ltd | Health & social care | 2019 |
| Greenplan Designer Homes (Kingston) Limited | Construction | 2020 |
| Greenplan Designer Homes (Mayfield) Limited | Construction | 2026 |
| Greenplan Designer Homes (Newick) Limited | Construction | 2016 |
| Greenplan Designer Homes (Nuthurst) Limited | Construction | 2016 |
| Greenplan Designer Homes Limited | Administrative & support | 2009 |
| Greenplan Land and Estates Limited | Real estate | 2025 |
| Greens ARC Limited | Extraterritorial | 2010 |
| Greensave Limited | Wholesale & retail | 1994 |
| Greenwood Sussex Limited | Real estate | 2012 |
| Grensol Limited | Professional & scientific | 2021 |
| Grey and Red Limited | Manufacturing | 2019 |
| Greybridge Ltd | Professional & scientific | 2018 |
| Greyfriars Colchester Limited | Hospitality | 2014 |
| Greyswood Consulting LLP | | 2010 |
| Griffiths & Nielsen Limited | Wholesale & retail | 1975 |
| Grill N Go Ltd | Hospitality | 2023 |
| Grimes Fire & Security Limited | Administrative & support | 2019 |
| Grizzly Bear Events Limited | Professional & scientific | 2019 |
| Grizzly's Barbering Academy Ltd | Other services | 2021 |
| Grizzly's Male Hair Salon Limited | Other services | 2017 |
| Groovetown Ltd | Professional & scientific | 2023 |
| Group Media Limited | Professional & scientific | 2015 |
| Grover Family Company Limited | Professional & scientific | 2014 |
| Grover Groundworks Ltd | Construction | 2025 |
| Grow LAB Organics Ltd | Agriculture & fishing | 2018 |
| Growth Enabled Limited | Professional & scientific | 2020 |
| GSF Holdings Limited | Financial services | 2023 |
| GSR Cars Ltd | Wholesale & retail | 2019 |
| GT Lifting Group Limited | Financial services | 2021 |
| GT Lifting Limited | Extraterritorial | 2008 |
| GT Lifting Machinery Sales Limited | Administrative & support | 2022 |
| GT Property (South) Limited | Real estate | 2021 |
| GTF Consulting Limited | Professional & scientific | 2020 |
| Gtsa Racing Limited | Arts & recreation | 2004 |
| Guest Comms Ltd | Administrative & support | 2025 |
| Guidedlink Limited | Professional & scientific | 2020 |
| Gulfhead Ltd | Wholesale & retail | 1991 |
| Gulliver Timber Treatments Limited | Construction | 1971 |
| Gunnersbury Mews Manco Limited | Households | 2022 |
| Gutely Sports Limited | Wholesale & retail | 2024 |
| GUY Automation Systems Limited | Information & communication | 2010 |
| GUY Hannell Consulting Limited | Professional & scientific | 2023 |
| Gwash Solutions Ltd | Transport & logistics | 2017 |
| Gym 26 Ltd | Arts & recreation | 2024 |
| Gyno Wise Limited | Health & social care | 2025 |
| H & F Express Freight Limited | Transport & logistics | 2004 |
| H & S Motor Services Ltd | Wholesale & retail | 2022 |
| H Catalyst Limited | Professional & scientific | 2021 |
| H I Building Contractors Ltd | Construction | 2004 |
| H.A.B.F Limited | Construction | 2003 |
| H.P.S. Development & Groundworks Ltd | Construction | 2007 |
| H.R.H. David's Ventures. Ltd | Professional & scientific | 2022 |
| H2 Development Consultancy Ltd | Real estate | 2025 |
| H2-NRG Ltd | Professional & scientific | 2010 |
| H2OGEO Ltd | Professional & scientific | 2025 |
| H3 Solicitors Limited | Professional & scientific | 2015 |
| HAC Systems Ltd | Professional & scientific | 2019 |
| Hackon Services Limited | Construction | 2006 |
| Hadron Designs Limited | Wholesale & retail | 2020 |
| Hadsul Ltd | Wholesale & retail | 2023 |
| Hagle Limited | Wholesale & retail | 2018 |
| Hague Commercial Properties Ltd | Real estate | 2021 |
| Hague Dental Supplies Limited | Manufacturing | 1998 |