| Fridayclan Business Support Ltd | Professional & scientific | 2011 |
| Frinab Fristad Industry Limited | Wholesale & retail | 2012 |
| Frontier Pitts Holdings Limited | Financial services | 2024 |
| Frontier-Pitts Limited | Manufacturing | 1991 |
| Frontline Care Solutions Ltd | Administrative & support | 2020 |
| Frontline Networks Ltd. | Information & communication | 1989 |
| FSK Traders Limited | Extraterritorial | 2017 |
| FSM Inspection Services Ltd | Professional & scientific | 2024 |
| FSN Group Ltd | Information & communication | 2025 |
| Ftdjohns Ltd | Real estate | 1990 |
| FTR Home Improvements Limited | Construction | 2024 |
| FTW Consulting Limited | Professional & scientific | 2023 |
| Fuligin Software Ltd | Information & communication | 2024 |
| Full Stack Corp Ltd | Information & communication | 2021 |
| Full Throttle Events Limited | Administrative & support | 2024 |
| Funakoshi Limited | Arts & recreation | 2014 |
| Funding People CIC | Administrative & support | 2020 |
| Furnace Green Properties LLP | | 2021 |
| Furniuk Ltd | Wholesale & retail | 2023 |
| Fuse Electrical Ltd | Construction | 2007 |
| Fusion Electrical Solutions Ltd | Construction | 2015 |
| Fuss Less Foods Ltd | Hospitality | 2023 |
| Futcher IT Web Ltd | Information & communication | 2026 |
| Future Distribution UK Limited | Wholesale & retail | 2007 |
| Future Logistics FL Ltd | Transport & logistics | 2018 |
| Future-Proof Heating Ltd | Construction | 2026 |
| Fuyo Aviation Capital Europe Limited | Professional & scientific | 2010 |
| FVR Entertainment Ltd. | Arts & recreation | 2015 |
| G & Portsmouth Ltd | Real estate | 2024 |
| G a M Deliveries Ltd | Transport & logistics | 2013 |
| G Classic London Limited | Wholesale & retail | 2025 |
| G Commerce Ltd | Wholesale & retail | 2025 |
| G D Parvin Painters & Decorators Limited | Construction | 2005 |
| G E Construction & Finishing Limited | Construction | 2015 |
| G H Property Management & Sales Ltd | Households | 2021 |
| G M Construction Group Ltd | Construction | 2017 |
| G S Environmental Services Ltd | Other services | 2019 |
| G Valley Electrical Ltd | Construction | 2018 |
| G&P BMS Ltd | Construction | 2026 |
| G-Forks Ltd | Construction | 2015 |
| G.A. Haymes & Sons Limited | Administrative & support | 1965 |
| G.A.Alma Portuguesa CIC | Arts & recreation | 2026 |
| G.E. Treacy Limited | Administrative & support | 1985 |
| G.E.W. (EC) Limited | Manufacturing | 1991 |
| G2HDEVELOPMENTS Ltd | Real estate | 2026 |
| G8TWAY Ltd | Health & social care | 2026 |
| GA Lifestyle Ltd | Wholesale & retail | 2020 |
| GA Trading B.V Limited | Wholesale & retail | 2025 |
| Gaba Furniture Limited | Wholesale & retail | 2025 |
| Gabocom Ltd. | Manufacturing | 2018 |
| Gaboos Limited | Construction | 2022 |
| Gaby Hand Car Wash Ltd | Administrative & support | 2017 |
| Gadhavi Solution Limited | Wholesale & retail | 2026 |
| Gaia Consultants Ltd | Professional & scientific | 2021 |
| Galaxy Homes Limited | Construction | 2009 |
| Galaxy Investments Limited | Construction | 2021 |
| Galaxy Land Limited | Construction | 2021 |
| Galaxy Ltd | Real estate | 2005 |
| Galaxy Properties Ltd | Extraterritorial | 2013 |
| GALAXY24 Limited | Wholesale & retail | 2026 |
| Galibier Investments Limited | Other services | 2013 |
| Gallagher Bros. Limited | Professional & scientific | 1983 |
| Game Insights Limited | Information & communication | 2019 |
| Gamechangers Home Ltd | Arts & recreation | 2023 |
| Gamermode Ltd | Wholesale & retail | 2024 |
| Gammon Management Consultants Limited | Professional & scientific | 2014 |
| GAP Contractors Limited | Construction | 2024 |
| GAP Tents Ltd | Other services | 2009 |
| Garage Conversion Solutions Ltd | Construction | 2026 |
| Garage Door Associates Limited | Construction | 1976 |
| Garage Labs Ltd | Information & communication | 2026 |
| Gardale Construction Ltd | Construction | 2013 |
| Garden Buildings on the Hill Ltd | Construction | 2023 |
| Garden Leisure Products Limited | Wholesale & retail | 1968 |
| Garden of Crystals Limited | Wholesale & retail | 2023 |
| Gareth Alexander Limited | Information & communication | 2023 |
| Garms Supermarket Ltd | Wholesale & retail | 2025 |
| Gartartan Limited | Professional & scientific | 2024 |
| Gary Stephen Construction Ltd | Construction | 2020 |
| GAS Trading Ltd | Construction | 2017 |
| Gasexp Services Ltd | Transport & logistics | 2021 |
| Gaskell Avenue Dental Practice Ltd | Health & social care | 2011 |
| Gasteiz Limited | Administrative & support | 2014 |
| Gate Cars Ltd | Transport & logistics | 2023 |
| Gateway Fleet Ltd. | Transport & logistics | 2024 |
| Gatwich Services Ltd | Wholesale & retail | 2014 |
| Gatwick Accommodations Ltd | Hospitality | 2025 |
| Gatwick Airport Couriers Ltd | Transport & logistics | 2014 |
| Gatwick App Cars Limited | Transport & logistics | 2017 |
| Gatwick Autos Ltd | Wholesale & retail | 2025 |
| Gatwick Aviation Museum | Arts & recreation | 1999 |
| Gatwick Car Wash Ltd | Administrative & support | 2024 |
| Gatwick Cars Limited | Transport & logistics | 2011 |
| Gatwick Computers Limited | Information & communication | 2012 |
| Gatwick Construction Limited | Construction | 2005 |
| Gatwick Detainees Welfare Group | Other services | 2003 |
| Gatwick Diamond Business | Other services | 1992 |
| Gatwick Diamond Initiative Limited | Administrative & support | 2011 |
| Gatwick Diamond Limited | Other services | 2025 |
| Gatwick Driving Academy Ltd | Education | 2025 |