| Fulford House Consulting Ltd | Professional & scientific | 2007 |
| Full Spread Limited | Manufacturing | 2000 |
| FUN to Learn (IOW) Limited | Education | 2025 |
| Functech Ltd | Information & communication | 2012 |
| Funmbo Ltd | Extraterritorial | 2024 |
| Furze Hill Childcare Centre Limited | Education | 2005 |
| Fusion Arts Academy Ltd | Education | 2026 |
| Fusion GAS Engineering Ltd | Construction | 2024 |
| Fusion Play Cafe CIC | Hospitality | 2026 |
| Fusion Real Estate Limited | Real estate | 2016 |
| Fusion Trade Group Ltd | Wholesale & retail | 2025 |
| Future AID Enterprise Ltd | Health & social care | 2023 |
| Future Broadcasting Corporation Ltd | Information & communication | 2026 |
| Future Financial Management Limited | Financial services | 2014 |
| Future Home Property Ltd | Other services | 2025 |
| Future Port Property 2 Limited | Real estate | 2026 |
| Future Port Property Limited | Real estate | 2019 |
| Futureaid Limited | Wholesale & retail | 2022 |
| Futurite Limited | Construction | 2003 |
| FYF Real Estate Limited | Real estate | 2019 |
| G & R Decorators Limited | Construction | 2003 |
| G & S Dairies Limited | Wholesale & retail | 2021 |
| G a Arnold Plumbing & Heating Limited | Construction | 2025 |
| G Allaway Limited | Manufacturing | 2006 |
| G Burgum Plumbing & Heating Limited | Construction | 2025 |
| G D Harris Stores Limited | Wholesale & retail | 2019 |
| G D Lettings Limited | Real estate | 2020 |
| G Davies Sales Limited | Wholesale & retail | 2023 |
| G E Heating Ltd | Construction | 2021 |
| G F H Fallen Stock Limited | Agriculture & fishing | 2016 |
| G F H Limited | Other services | 2003 |
| G Holmes (Sutton) Limited | Agriculture & fishing | 2025 |
| G J Dore Heating and Plumbing Services Limited | Construction | 2018 |
| G J Edwards Consulting Limited | Health & social care | 2020 |
| G J FOX Ltd | Information & communication | 2019 |
| G Lorenzen Ltd | Real estate | 2025 |
| G N S a Ltd | Wholesale & retail | 2022 |
| G P O'Keeffe Limited | Health & social care | 2008 |
| G Poyner Carpentry & Construction Ltd | Construction | 2023 |
| G T Kitchens & Bathrooms Ltd | Construction | 2014 |
| G Webb Developments Limited | Construction | 2014 |
| G Wiltshire Building Services Ltd | Construction | 2013 |
| G&Ahairorganic Limited | Other services | 2018 |
| G&W Property Development Ltd | Real estate | 2025 |
| G. Mustafa Limited | Wholesale & retail | 2019 |
| G.A. Carr (Steel Reinforcements) Limited | | 1972 |
| G.D.B Building Solutions Ltd | Construction | 2018 |
| G.F.Williams & Sons(Risca)Garages Limited | Wholesale & retail | 1955 |
| G.I.B. Motors Limited | Real estate | 1976 |
| G.M.L Scaffolding Ltd | Construction | 2019 |
| G.Whitfield & SON Limited | Agriculture & fishing | 1963 |
| G24 Power Limited | Manufacturing | 2012 |
| G2A Energy Limited | Administrative & support | 2008 |
| Gabriel Bidco Limited | Financial services | 2020 |
| Gabriel Garage Limited | Wholesale & retail | 2024 |
| Gabriel Holdco 1 Limited | Financial services | 2020 |
| Gabriel Holdco 2 Limited | Financial services | 2020 |
| Gabriel Topco Limited | Financial services | 2020 |
| Gabrielle Blackman Interiors Limited | Information & communication | 2012 |
| Gadangme Bristol Ltd | Other services | 2023 |
| Gaer Community Network | Health & social care | 2006 |
| Gain Vending Ltd | Wholesale & retail | 2019 |
| Galebridge Limited | | 1977 |
| Gallagher Country Clothing Limited | Wholesale & retail | 2025 |
| Gallagher Enterprises Limited | Arts & recreation | 1986 |
| Gallagher Equestrian Limited | Wholesale & retail | 2025 |
| Gallery 57 Ltd | Wholesale & retail | 2021 |
| Galley Bay Holdings Ltd | Financial services | 2025 |
| Galley Bay Property Ltd | Real estate | 2025 |
| Gambarini Limited | Professional & scientific | 1994 |
| Gane Access Ltd | Construction | 2025 |
| Gane Energy Ltd | Construction | 2025 |
| Gane Group Ltd | Financial services | 2025 |
| Gane Structures Limited | Construction | 2021 |
| Gann Services Ltd | Health & social care | 2024 |
| Ganwave Ltd | Manufacturing | 2021 |
| Garbetts (IOW) Limited | Professional & scientific | 2012 |
| Garcia & Lewis Limited | Wholesale & retail | 2014 |
| Gardd Y MÔR a Gwehyddu’R TIR /Ocean Garden and Land Weaving (Oglw) CYF | Professional & scientific | 2026 |
| GARDENTOOLS24-7 Ltd | Wholesale & retail | 2023 |
| Gardor Property Limited | Real estate | 2022 |
| Gardvenus Property Ltd | Real estate | 2016 |
| Gareth Evans Consulting Ltd | Professional & scientific | 2014 |
| Gareth Williams Heating Limited | Manufacturing | 2015 |
| Garia Foods Ltd | Hospitality | 2025 |
| Garib Group Limited | Hospitality | 2024 |
| Garip 12 Ltd | Hospitality | 2025 |
| Garn and Smee Ltd | Administrative & support | 2020 |
| Garnhill Investment Company Limited | Administrative & support | 1953 |
| Garnock House (Management) Limited | Households | 2001 |
| Garnsychan Community Trading Limited | Administrative & support | 2003 |
| Garnsychan Partnership | Wholesale & retail | 2012 |
| Gart Investments Limited | Manufacturing | 2014 |
| Garvey-Williams Enterprises Ltd | Professional & scientific | 2014 |
| Gary Allen Cherry Pickers Limited | Administrative & support | 2020 |
| Gary Mcinulty Limited | Mining & quarrying | 2017 |
| GAS & Cryo Engineering Services Ltd | Professional & scientific | 2009 |
| GAS IOW Ltd | Construction | 2019 |
| GAS Worx South Wales Limited | Other services | 2020 |
| Gasim Family Limited | Transport & logistics | 2025 |