| Futures Unlocked | Health & social care | 2006 |
| FWA Collective Ltd | Information & communication | 2020 |
| FWH Creations | Education | 2013 |
| Fyne Packaging Limited | Manufacturing | 1993 |
| Fzameen UK Limited | Transport & logistics | 2013 |
| G & D Land Development Limited | Real estate | 2006 |
| G & F Holdings Limited | Administrative & support | 2020 |
| G & N Joinery Limited | Manufacturing | 2002 |
| G & R Garage Ltd | Manufacturing | 2019 |
| G & S Property Assets Ltd | Real estate | 2026 |
| G a Spencer and SON Limited | Agriculture & fishing | 2025 |
| G Branch Ltd | Other services | 2017 |
| G Costa Electrical Ltd | Construction | 2023 |
| G E Door Manufacturing Limited | Manufacturing | 2006 |
| G E Door Solutions Limited | Professional & scientific | 2002 |
| G E Driving Services Limited | Transport & logistics | 2017 |
| G Fairgrieve Ltd | Health & social care | 2019 |
| G Force Global Ltd | Professional & scientific | 2022 |
| G Force Martial Arts Daventry Ltd | Arts & recreation | 2022 |
| G Force Merchandise Ltd | Wholesale & retail | 2022 |
| G J Mccabe Limited | Construction | 2006 |
| G J Properties (UK) Limited | Real estate | 2002 |
| G Wallace Builders Ltd. | Construction | 2014 |
| G&M Transport Ltd. | Transport & logistics | 2013 |
| G&T Care Ltd | Real estate | 2022 |
| G&V Brown Limited | Mining & quarrying | 2014 |
| G.A.R. Electrics Limited | | 1983 |
| G.C. Gregory & SON Ltd | Construction | 2007 |
| G.E. Carpentry Services Limited | Extraterritorial | 1999 |
| G.H - V.H Ltd | Information & communication | 2024 |
| G.I. Computer Services Limited | Information & communication | 1980 |
| G.O. Attachments Limited | Manufacturing | 2024 |
| G.W. Boult & Sons Limited | Real estate | 1975 |
| G3 Recruitment Ltd | Administrative & support | 2024 |
| G33 Ltd | Real estate | 2024 |
| Gabs-Trans Ltd | Transport & logistics | 2015 |
| Gaby and Much More Limited | Wholesale & retail | 2026 |
| Galante Solutions Ltd | Wholesale & retail | 2024 |
| Galica Ltd | Information & communication | 2026 |
| Galliford Brothers Limited | Other services | 1967 |
| Gamatech Homes Ltd | Real estate | 2023 |
| GAP Prestige Properties Ltd | Construction | 2026 |
| Gardner Corporations Limited | Financial services | 2024 |
| Garfield Trucking Limited | Wholesale & retail | 2016 |
| Garg Real Estate Limited | Real estate | 2025 |
| Garland Property Holdings Limited | Real estate | 2020 |
| Garrett Comfin Ltd | Professional & scientific | 2025 |
| Garrett Commercial Finance Ltd | Professional & scientific | 2022 |
| Garrett Residential Lettings Ltd | Real estate | 2025 |
| Garrett Residential Placements Ltd | Real estate | 2017 |
| Garvey Property Developments Limited | Real estate | 2003 |
| Gastro Medical Solutions LLP | | 2009 |
| Gavin Walsh Limited | Information & communication | 2011 |
| GB E Systems Ltd | Professional & scientific | 2023 |
| GB3 Collective Ltd | Information & communication | 2026 |
| GBE Electrical Ltd | Construction | 2023 |
| GC Technologies Ltd | Information & communication | 2018 |
| GDC Plumbing and GAS Ltd | Construction | 2021 |
| GE Construction Ltd | Construction | 2009 |
| GE Energy Power Conversion Technology Limited | Professional & scientific | 2006 |
| GE Energy Power Conversion UK Holdings Limited | Manufacturing | 2008 |
| GE Energy Power Conversion UK Limited | Manufacturing | 2005 |
| Geana Trans Limited | Transport & logistics | 2019 |
| Geldco Trading Ltd | Wholesale & retail | 2017 |
| Gems-Uk Services Limited | Education | 2015 |
| Gems.Uk.Property Services Ltd | Real estate | 2018 |
| Generac Global UK Limited | Financial services | 1947 |
| Generac Holdings UK Limited | Financial services | 2012 |
| Genesis DM Limited | Professional & scientific | 2006 |
| Genius Teams Interactive Limited | Information & communication | 2026 |
| Genx AI Limited | Information & communication | 2024 |
| Geoffrey Creighton Limited | Real estate | 1963 |
| Geoma Surveys Limited | Professional & scientific | 2015 |
| GEOMETRY3 Ltd | Professional & scientific | 2017 |
| George and Company (Surveyors) Limited | Real estate | 2010 |
| George Burton Architecture & Ecology Ltd | Professional & scientific | 2007 |
| George Henry Consulting Limited | Professional & scientific | 2017 |
| George Law Limited | Construction | 1924 |
| Georgia Warner & Company Limited | Administrative & support | 2014 |
| Georgie & Michael Ltd | Arts & recreation | 2025 |
| Geotek Consultants Ltd | Construction | 2022 |
| Geown Design Ltd | Construction | 2025 |
| Gergoa Ltd | Financial services | 2019 |
| German Dehnik Ltd | Transport & logistics | 2019 |
| Gervase Limited | Real estate | 2016 |
| Gezim Builders Ltd | Construction | 2025 |
| GF Construction Midlands Ltd | Construction | 2008 |
| GFD JR Ltd | Wholesale & retail | 2019 |
| GG PLM Implementations Limited | Information & communication | 2012 |
| GH Controls Limited | Information & communication | 2005 |
| Ghann Bathrooms Ltd | Construction | 2021 |
| Ghats Bloom Ltd | Manufacturing | 2025 |
| GHC Properties Limited | Real estate | 2021 |
| Gherkin Homes and Properties Limited | Construction | 2020 |
| Ghetto Swing High Power Ltd | Professional & scientific | 2011 |
| Gibbs Drivers Limited | Administrative & support | 2017 |
| Gibson Portfolio Ltd | Real estate | 2018 |
| Gibson's Plumbing and Heating Limited | Construction | 2013 |
| Gidgit Limited | Information & communication | 2017 |
| Gifted Healthcare Services Ltd | Health & social care | 2023 |