| Furlong House (Warminster) Freehold Limited | Real estate | 2016 |
| Fusion Office Ltd | Wholesale & retail | 2016 |
| G B Medical Limited | Wholesale & retail | 2003 |
| G Hall Investments Limited | Financial services | 2023 |
| G Mitchell Recruitment Services Ltd | Administrative & support | 2021 |
| G Squared UK Limited | Wholesale & retail | 2002 |
| G&G Media Ltd | Administrative & support | 2023 |
| G&J ARK Ltd | Real estate | 2021 |
| G.P.T.I. | Professional & scientific | 1995 |
| G.W Installers Ltd | Construction | 2015 |
| G39 IT Started With a Coffee Limited | Manufacturing | 2025 |
| G8GRACE Limited | Education | 2014 |
| GA Validus Limited | Hospitality | 2024 |
| Gabriel & Iulian Ltd | Manufacturing | 2020 |
| Gagnon Direct Ltd | Wholesale & retail | 2016 |
| Gagnon Essentials Limited | Manufacturing | 2006 |
| Gainspace Limited | Manufacturing | 2009 |
| Gallagher Health and Safety Solutions Limited | Professional & scientific | 2021 |
| Gallaghers Florist Limited | Wholesale & retail | 2012 |
| Garvey Properties Ltd | Real estate | 2025 |
| Gasac Ltd | Transport & logistics | 2019 |
| Gattis Developments Limited | Construction | 1972 |
| Gauge Factors Limited | Manufacturing | 1994 |
| GB Electrical Contractors Ltd | Construction | 2026 |
| GB Flying Club Limited | Education | 2026 |
| Gcib Ltd | Administrative & support | 2024 |
| GCM Electrical Contractors Ltd | Construction | 2015 |
| GD Andover Limited | Hospitality | 2019 |
| GDC Accountancy Solutions Limited | Professional & scientific | 2003 |
| Gdfx Limited | Arts & recreation | 2021 |
| Geared Beta Limited | Professional & scientific | 2016 |
| Geckopropertyletting Ltd | Real estate | 2026 |
| Geefit Limited | Education | 2021 |
| Generation Group Transport Ltd | Wholesale & retail | 2022 |
| GENESIS50 Ltd | Information & communication | 2025 |
| Geocento Limited | Professional & scientific | 2011 |
| Geoff Aubrey & Sons Family Butchers Ltd | Wholesale & retail | 2025 |
| Geonet Limited | Professional & scientific | 2019 |
| George & Sallys Limited | Wholesale & retail | 2025 |
| George Prior-Palmer Limited | Professional & scientific | 2025 |
| Gerry Saraza Limited | Construction | 2016 |
| Gert Lush Driving Limited | Education | 2018 |
| GFP Group Limited | Professional & scientific | 2024 |
| GFP Property Limited | Professional & scientific | 2024 |
| Gibson Site Management Ltd | Professional & scientific | 2026 |
| Gildan Scaffolding Limited | Administrative & support | 2010 |
| Gilshore Electrical Ltd | Construction | 2015 |
| Gingers Plumbing & Heating Ltd | Construction | 2025 |
| Gitanjalee Property UK Ltd | Real estate | 2024 |
| Giwamm Limited | Financial services | 2013 |
| Gjaa Ltd | Hospitality | 2022 |
| GK Sales Limited | Administrative & support | 2025 |
| Gladstone Building Limited | Construction | 2014 |
| Glen Close (Andover) Management Company Limited | Households | 1985 |
| Glide Cleaning Limited | Administrative & support | 2013 |
| Glimpse ADS Ltd | Professional & scientific | 2025 |
| Global Action Limited | Education | 2012 |
| Global Properties (Europe) Ltd | Real estate | 2002 |
| Global Technology Solutions Limited | Information & communication | 2001 |
| Global Upholstery Solutions Limited | Manufacturing | 1989 |
| Globe Galleries Limited | Wholesale & retail | 2013 |
| Gloworm Solutions Ltd | Construction | 2013 |
| GM Fitter Ltd | Construction | 2015 |
| Gm&Dm Properties Ltd | Real estate | 2021 |
| Go Coffee Ltd | Manufacturing | 2024 |
| Go Vapour UK Ltd | Wholesale & retail | 2013 |
| Goat on the Roof Ltd | Hospitality | 2017 |
| Godfreys Furniture Ltd | Wholesale & retail | 2025 |
| Godstone Consultancy Services Limited | Professional & scientific | 1995 |
| Gold-Day Consult Ltd | Professional & scientific | 2021 |
| Gold-Den Memories Ltd | Wholesale & retail | 2022 |
| Gone Dark Ltd | Administrative & support | 2019 |
| Gorselands Consulting Ltd | Professional & scientific | 2015 |
| Gozlugol Limited | Hospitality | 2008 |
| GR84U Ltd | Transport & logistics | 2023 |
| Gracematty Freight & Travel Services Ltd | Transport & logistics | 2022 |
| Gradgate Ltd | Professional & scientific | 2019 |
| Graeme Stewart Therapy Limited | Other services | 2007 |
| Granary Creative Arts C.I.C. | Education | 2017 |
| Grantham UK Holdings Ltd | Financial services | 2020 |
| Grantham UK Management Ltd | Administrative & support | 2018 |
| Grays House Management Company Limited | Households | 2022 |
| Grays Orchard Management Company Limited | Households | 2021 |
| Grazing Table Limited | Hospitality | 2018 |
| Great Britain Jujitsu Ltd | Arts & recreation | 2020 |
| Green Heart Oak Ltd | Agriculture & fishing | 2025 |
| Green Zebra Business Solutions Ltd | Professional & scientific | 2017 |
| Greenbrokers Limited | Wholesale & retail | 2011 |
| Greenflints Ltd | Administrative & support | 2020 |
| Greenstar Building Services Limited | Construction | 2025 |
| Greg King Services Ltd | Manufacturing | 2026 |
| Gregorex Transport Ltd | Transport & logistics | 2016 |
| Gregory J Smith Limited | Water & waste | 2007 |
| Greycell Green Ltd | Professional & scientific | 2025 |
| Greypoint Legal Services Ltd | Administrative & support | 2017 |
| Griggrose Coaches Ltd | Transport & logistics | 2019 |
| Grosvenor & Grosvenor Ltd | Professional & scientific | 2021 |
| Groundlord Environmental Ltd | Other services | 2023 |
| Groundlord Holdings Limited | Financial services | 2023 |
| Groundlord Ltd | Agriculture & fishing | 2015 |