| Fuelfusionconnect Holdings Limited | Manufacturing | 2025 |
| FUL Designs Limited | Professional & scientific | 2007 |
| Fully Prepped Limited | Information & communication | 2014 |
| Fundamentally First AID Limited | Professional & scientific | 2021 |
| Furnbury Interior Design Ltd | Professional & scientific | 2018 |
| Furniture & Fireplaces Ltd | Wholesale & retail | 2011 |
| Furrapy Limited | Wholesale & retail | 2026 |
| Furrow Media Limited | Information & communication | 2019 |
| Fusion Comms Ltd | Professional & scientific | 2019 |
| Futerra Trust Limited | Education | 2002 |
| Future Places Studio Ltd | Construction | 2016 |
| Future Work Force Limited | Information & communication | 2019 |
| Futuro Limited | Real estate | 2015 |
| G & B Consulting Limited | Professional & scientific | 2017 |
| G and J Ortho Limited | Health & social care | 2015 |
| G J James Limited | Wholesale & retail | 2008 |
| G W Education Consultancy Limited | Education | 2013 |
| G Warren Consultancy Ltd | Professional & scientific | 2017 |
| G-Money Productions Ltd | Information & communication | 2018 |
| G.Ely Construction Surrey Limited | Construction | 2016 |
| G.G.A.P. Investment Properties Limited | Administrative & support | 2003 |
| G.S. Contracts (Joinery) Limited | Construction | 1992 |
| G4 Contracts Limited | Administrative & support | 2010 |
| G4 Pro Investments Limited | Construction | 2013 |
| GA Ventures Ltd | Wholesale & retail | 2024 |
| Ga&A Design Limited | Professional & scientific | 2009 |
| Gable Homes Ventures Limited | Real estate | 2015 |
| Gadget Branch UK Ltd | Information & communication | 2026 |
| Gaiters Consulting Limited | Professional & scientific | 2013 |
| Gangar Studios Ltd | Professional & scientific | 2024 |
| Garage Play Ltd | Professional & scientific | 2020 |
| Gareth Scragg Associates Limited | Professional & scientific | 2016 |
| Gargonay Limited | Financial services | 2014 |
| Gary MC Associates Ltd | Professional & scientific | 2021 |
| Gary Obrien Compliance Limited | Professional & scientific | 2013 |
| Gascoignes Property Services Limited | Real estate | 2002 |
| Gascoignes Residential (Claygate) Limited | Real estate | 2003 |
| Gascoignes Residential (Cobham) Limited | Real estate | 2002 |
| Gascoignes Residential (Woking) Limited | Real estate | 2002 |
| Gasplumbheat Ltd | Construction | 2021 |
| Gasworks Nine Ltd | Professional & scientific | 2016 |
| Gateway Property Development UK Ltd | Construction | 2021 |
| Gatewin Limited | Administrative & support | 2011 |
| Gaya Design Ltd | Professional & scientific | 2018 |
| Gazelle Limited | Information & communication | 2020 |
| GBR Scaffolding Limited | Construction | 2019 |
| GBW Brand Consultancy Limited | Professional & scientific | 2016 |
| GCA (Surrey) Limited | Professional & scientific | 2003 |
| GCA Accountancy Services LLP | | 2001 |
| GCA Beacon House Ltd | Information & communication | 2018 |
| GCA Properties Limited | Real estate | 2015 |
| GCP Developments Limited | Real estate | 1996 |
| Gcpbuild Ltd | Construction | 2023 |
| GCR Consulting Ltd | Professional & scientific | 2019 |
| GDH Fire and Security Limited | Administrative & support | 2019 |
| Gearing Developments Limited | Construction | 2022 |
| GEM Consultants (London) Ltd. | Other services | 2010 |
| Gemic Limited | Professional & scientific | 2009 |
| Geminera Limited | Wholesale & retail | 2005 |
| Gene Vantage Ltd | Professional & scientific | 2020 |
| Generate Media Limited | Information & communication | 2021 |
| Genre Splice Ltd | Information & communication | 2023 |
| Genus Treatments Limited | Wholesale & retail | 2004 |
| George Finlay Investments Limited | Financial services | 2020 |
| George James Software Limited | Information & communication | 1990 |
| George Trevor & Associates Limited | Real estate | 1992 |
| Geotechnical Observations Holdings Limited | Financial services | 2023 |
| Geotechnical Observations Investments Limited | Financial services | 2023 |
| Geotechnical Observations Limited | Construction | 2000 |
| Geotechnical Observations Property Limited | Financial services | 2023 |
| GET to IT Limited | Professional & scientific | 2016 |
| GG-205-139 Limited | Real estate | 2023 |
| GGC Residential Ltd | Financial services | 2021 |
| GH Business Consulting Limited | Professional & scientific | 2022 |
| Gibilaro Design Limited | Wholesale & retail | 2012 |
| Gilbyim Services Limited | Information & communication | 2021 |
| Giles Ramsay Investments Ltd | Real estate | 2016 |
| Giles Ramsay Ltd | Other services | 2005 |
| Gillette Industries Limited | Professional & scientific | 1977 |
| Gillette U.K. Limited | Manufacturing | 1931 |
| Ginger PR Ltd | Professional & scientific | 2009 |
| Gini Pearl Ltd. | Wholesale & retail | 1993 |
| Givons House Freehold Limited | Households | 2023 |
| GJK Associates Limited | Professional & scientific | 2018 |
| Gladechester Ltd | Administrative & support | 2011 |
| Glass Crafters Ltd | Construction | 2024 |
| Glaxosmithkline Consumer Healthcare (UK) (NO.1) Limited | Professional & scientific | 1963 |
| GLD Accounting Ltd | Professional & scientific | 2013 |
| Glen Court Residents Association Limited | Households | 2005 |
| Glenconner Residents Limited | Households | 1990 |
| Glendevon South Limited | Professional & scientific | 2014 |
| Glgi Ltd | Administrative & support | 2019 |
| Glideway Consulting Ltd | Professional & scientific | 2024 |
| Glitterati Hair Limited | Other services | 2006 |
| Glitterati Holdings Limited | Financial services | 2015 |
| Global Resourcing Services & Consulting Limited | Professional & scientific | 2011 |
| Global Southern Holdings Limited | Financial services | 2020 |
| Global Southern Limited | Construction | 2017 |
| Global Travel Tech Association Ltd | Information & communication | 2026 |
| Global Village Wines Limited | Wholesale & retail | 2009 |