| G & W Lettings Limited | Real estate | 2016 |
| G Billis Limited | Administrative & support | 2007 |
| G Consultancy Ltd | Professional & scientific | 2011 |
| G E Blake Property Services Ltd | Construction | 2019 |
| G J Contracts Ltd | Administrative & support | 2010 |
| G M Autocare Limited | Wholesale & retail | 2004 |
| G Milham Consultancy Limited | Mining & quarrying | 2012 |
| G Sellar Property Investments Limited | Construction | 2014 |
| G Welford Europe Ltd | Professional & scientific | 2021 |
| G Welford Limited | Professional & scientific | 2017 |
| G&A Kitchen Architecture Ltd | Wholesale & retail | 2022 |
| G&S Maynard Heating Ltd | Construction | 2020 |
| G.& W.Motors Limited | Real estate | 1946 |
| G.A. Lomer & SON Limited | Transport & logistics | 1998 |
| G.O.Smart Civils Limited | Construction | 2020 |
| G10GROUP Limited | Professional & scientific | 2026 |
| G2 Brenna Holdings Limited | Professional & scientific | 2014 |
| GAB Outsourcing Limited | Administrative & support | 2012 |
| Gabluca Limited | Construction | 2018 |
| Gachapon Limited | Professional & scientific | 2018 |
| Gaggle Group Ltd | Information & communication | 2021 |
| Gain Group Limited | Financial services | 2020 |
| Gainfield Capital Ltd | Construction | 2019 |
| Gainsbury Limited | Professional & scientific | 2011 |
| Galen Therapy Training Centre Ltd | Professional & scientific | 2009 |
| Galloways Accounting (Uckfield) Limited | Professional & scientific | 1999 |
| GAM Leasing Bond Co (Trustee) Limited | Administrative & support | 2013 |
| Gamehurst Farm Limited | Administrative & support | 2006 |
| Garden Design & Renovation Limited | Administrative & support | 2008 |
| Garden House Consulting Ltd | Professional & scientific | 2024 |
| Gary Morgan Coaching Ltd | Administrative & support | 2022 |
| Gas-Tech & Renewables Limited | Construction | 2022 |
| Gasson & Green Limited | Construction | 1961 |
| Gatehouse Security Limited | Manufacturing | 2010 |
| Gatsby Capital Partners Ltd | Professional & scientific | 2015 |
| Gatwick Stayaways Ltd | Real estate | 2026 |
| Gavaddy Ltd | Wholesale & retail | 2025 |
| GB Roofers & Building Contractors Ltd | Construction | 2014 |
| Gbfm Consultancy Limited | Professional & scientific | 2023 |
| Gbuzz Limited | Information & communication | 2014 |
| GC Music Trading Ltd | Information & communication | 2018 |
| GC Welding Ltd | Professional & scientific | 2023 |
| GD Architectural Design UK Limited | Professional & scientific | 2025 |
| GEM Stone Graphics Limited | Manufacturing | 2004 |
| Gemini X2 Limited | Administrative & support | 2024 |
| Gemrock Company (UK) Ltd | Financial services | 2016 |
| Gemswick Tech Ltd | Extraterritorial | 2016 |
| General Asset Management Bond Co 1 Ltd | Financial services | 2012 |
| General Asset Management Leasing Ltd | Financial services | 2012 |
| General Asset Management Limited | Financial services | 2000 |
| General Asset Management UK Ltd | Financial services | 2004 |
| General Office Architects Limited | Professional & scientific | 2023 |
| Genesis Emea Ltd | Information & communication | 2016 |
| Genesis Reprocessing Ltd | Water & waste | 2024 |
| Genesis Trading Limited | Construction | 1992 |
| Genetic Signatures (UK) Limited | Professional & scientific | 2020 |
| Genzkool Ltd | Professional & scientific | 2024 |
| GEO Design and Build Ltd | Manufacturing | 2025 |
| GEO Energy Holding LLP | | 2022 |
| Geoenvironmental Professionals (GEO Pro) Limited | Construction | 2024 |
| Geoff Keeling Ltd | Professional & scientific | 2019 |
| Geoffrey Darling Associates LLP | | 2012 |
| Georganics Oral Care Limited | Manufacturing | 2023 |
| Georgi 07 Limited | Construction | 2007 |
| Getaroundcars.Com Ltd | Wholesale & retail | 2014 |
| Gfdi Training Ltd | Administrative & support | 2025 |
| GGA Property Maintenance Limited | Construction | 2025 |
| Giftcards Tech UK Ltd | Professional & scientific | 2026 |
| Giga Distributors LLP | | 2019 |
| Gigglebeats Limited | Arts & recreation | 2025 |
| Giggleton Limited | Health & social care | 2025 |
| Gilbert Enterprises Limited | Wholesale & retail | 2024 |
| Giles W Pritchard-Gordon (Shipowning) Limited | Transport & logistics | 1981 |
| Giles W. Pritchard-Gordon & Co. Limited | Professional & scientific | 1973 |
| Giles W. Pritchard-Gordon (Farming) Limited | Agriculture & fishing | 1981 |
| Giles W. Pritchard-Gordon (Property) Limited | Real estate | 1984 |
| Ginori 1735 Limited | Wholesale & retail | 2021 |
| Giorgia's Design Studio Ltd | Information & communication | 2026 |
| Givonsbrothers Limited | Agriculture & fishing | 2022 |
| GK Advisory Limited | Administrative & support | 2026 |
| GKC Associates Ltd | Professional & scientific | 2025 |
| GKD Training Limited | Administrative & support | 2005 |
| Glantz Talent Solutions Ltd | Administrative & support | 2023 |
| Glazebox Limited | Construction | 2025 |
| Glazepoint Ltd | Administrative & support | 2024 |
| Glazing Spaces Ltd | Manufacturing | 2022 |
| Glen Gordon Residents Association Limited | Households | 1985 |
| Glenbeigh Developments Limited | Real estate | 2002 |
| GLO Design and Event Production Limited | Information & communication | 2012 |
| Global Aquatic Investments Limited | Financial services | 2026 |
| Global Business Connects Ltd | Wholesale & retail | 2023 |
| Global Business Links Ltd | Administrative & support | 2025 |
| Global Capital Direct Limited | Administrative & support | 2015 |
| Global Consolidated Solutions Limited | Wholesale & retail | 2000 |
| Global FDI Consulting Ltd | Professional & scientific | 2023 |
| Global FDI Group Ltd | Administrative & support | 2023 |
| Global FDI Ltd | Administrative & support | 2016 |
| Global ID Marketing Ltd | Manufacturing | 2019 |
| Global M&E Cost Consulting Limited | Professional & scientific | 2024 |
| Global Performance Insights Ltd | Education | 2021 |