| Fast Like Thunder Limited | Health & social care | 2012 |
| Fawley Mews Residents Association Limited | Households | 1993 |
| FB Systems Limited | Information & communication | 1999 |
| FCF PT DD Ltd | Health & social care | 2023 |
| FCF PT MD Ltd | Health & social care | 2023 |
| FCS Resources Limited | Administrative & support | 2002 |
| Feltham Construction Limited | Construction | 1986 |
| Ferguson Group Holdco Limited | Professional & scientific | 2005 |
| Ferguson Group Services Limited | Administrative & support | 1966 |
| Ferguson Overseas Limited | Professional & scientific | 1964 |
| Ferguson UK Holdings Limited | Professional & scientific | 1889 |
| Ferguson Winnersh Finance (Theale) Limited | Extraterritorial | 2003 |
| Ferguson Winnersh Properties Limited | Extraterritorial | 1964 |
| Ficka Properties Limited | Real estate | 2026 |
| Field House Residents' Association Limited | Other services | 1977 |
| Fieldhouses Limited | Professional & scientific | 2005 |
| Filbea | | 2000 |
| Fineways Property Limited | Construction | 2002 |
| Fireport Limited | Information & communication | 2005 |
| First Class Systems Ltd | Information & communication | 2002 |
| First Recruitment Limited | Administrative & support | 2003 |
| Firstbronze Limited | Professional & scientific | 1984 |
| Fitz Solicitors Limited | Professional & scientific | 2013 |
| FK Autos Ltd | Wholesale & retail | 2005 |
| Fleetbridge Limited | Transport & logistics | 1989 |
| Fletcher Foale Limited | Professional & scientific | 2004 |
| Flint Services Limited | Wholesale & retail | 1996 |
| Floortique Group Ltd | Construction | 2018 |
| Fone Connections Services Limited | Wholesale & retail | 1996 |
| Food Manufacturers (G.B. Company) | Professional & scientific | 1974 |
| Fordata Computer Services Limited | Professional & scientific | 1991 |
| Forever Energy Limited | Extraterritorial | 1969 |
| Forever Fuels Limited | Extraterritorial | 2007 |
| Forge for Change Limited | Information & communication | 2000 |
| Forge Motor Company Limited | Wholesale & retail | 2005 |
| Forno Siciliano Limited | Manufacturing | 1993 |
| Fort & Co Solicitors Limited | Professional & scientific | 2003 |
| Founder Scale Limited | Professional & scientific | 2025 |
| Four. B. H. Ltd | Households | 1995 |
| Foxhaven Court Management Co Limited | Real estate | 1988 |
| FQ Media Limited | Information & communication | 2005 |
| Frameapply Limited | Extraterritorial | 1994 |
| Frank Haighton Forestry Ltd | Agriculture & fishing | 2004 |
| Franklin Kotz Ltd | Professional & scientific | 2006 |
| Franktee Ltd | Health & social care | 2021 |
| Freedom Electronics Limited | Manufacturing | 2005 |
| Freight Transport Organization Limited | Transport & logistics | 2025 |
| Frenchies House Ltd | Wholesale & retail | 2024 |
| Fresh Fortune Limited | Wholesale & retail | 2016 |
| Fuel Serv Ltd | Wholesale & retail | 2015 |
| Fullers Distribution Limited | Transport & logistics | 1989 |
| Fullers Holdings Limited | Administrative & support | 2001 |
| Fullers Logistics Group Holdings Limited | Professional & scientific | 1993 |
| Fullers Logistics Limited | Transport & logistics | 1973 |
| Fullers Transport Limited | Professional & scientific | 1970 |
| Fullhouse Customs Ltd | Wholesale & retail | 2015 |
| Funsongs Education Ltd | Information & communication | 1997 |
| Furniture Village Group Limited | Professional & scientific | 2001 |
| Furniture Village Holdings Limited | Professional & scientific | 2007 |
| Furniture Village Limited | Wholesale & retail | 1988 |
| Futura Consultancy Ltd | Professional & scientific | 1998 |
| G.D. Contracting Ltd. | Construction | 2000 |
| G.N.Dev Company Ltd | Construction | 2014 |
| G.Q.S Services Ltd | Administrative & support | 2007 |
| Gakhal Construction Ltd | Construction | 2022 |
| Galeco Holdings Limited | Financial services | 2007 |
| Garden Thyme. Garden Maintenance and Landscape Ltd | Administrative & support | 2007 |
| GB GAS Holdings Limited | Professional & scientific | 1996 |
| GCD Security (Locksmiths) Limited | Wholesale & retail | 2005 |
| Gemstone Traders Ltd | Professional & scientific | 2008 |
| General Building Company & Sons Ltd | Construction | 2016 |
| General Environmental Services Limited | Administrative & support | 1990 |
| General Express Limited | Transport & logistics | 1998 |
| Geoffrey John Construction Limited | Construction | 2020 |
| Gerra Limited | Extraterritorial | 2000 |
| Ghost and Oak Holdings Ltd | Financial services | 2026 |
| Gillane Limited | Information & communication | 1997 |
| Gimme Shelter Ltd | Administrative & support | 1999 |
| GJH Property Services Limited | Construction | 2019 |
| Glasgow Square Limited | Financial services | 1999 |
| Glasrite Ltd. | Construction | 1991 |
| Glenbarr (Management) Company Limited | Households | 1981 |
| Global Floors Limited | Construction | 2000 |
| Global Regsperts Ltd | Professional & scientific | 2024 |
| Globe Cars (Heathrow) Limited | | 1981 |
| Gloucester Room Limited | Wholesale & retail | 2006 |
| Goldprint Limited | Manufacturing | 1982 |
| Good Life Homes Ltd | Real estate | 2023 |
| Graffiti UK Limited | Real estate | 2001 |
| Gramdale Property Investment Co. Limited | Real estate | 1963 |
| Granada Road Flats Limited | Households | 2002 |
| Grand Eating Limited | Hospitality | 1999 |
| Greeklicious 2 Ltd | Hospitality | 2024 |
| Green Hydrogen Limited | Extraterritorial | 2006 |
| Green Parlour Limited | Wholesale & retail | 2008 |
| Green Wave Tech Ltd | Professional & scientific | 2022 |
| Green,Young & Company Limited | Professional & scientific | 1963 |
| Greenacre Computer Services Limited | Information & communication | 2002 |
| Greenfingers Ground Maintenance Limited | Administrative & support | 2007 |
| Greenham Construction Limited | Construction | 2002 |