| Four Seasons Marquees Hire Ltd | Administrative & support | 2024 |
| Four Star Reproductions Limited | | 1981 |
| Foursight Security Systems Ltd | Manufacturing | 2002 |
| FOX Inn on the Green Ltd | Hospitality | 2025 |
| Foxhound Riding School Limited | Arts & recreation | 1966 |
| Foxplan Limited | Information & communication | 1998 |
| FP Property Investments Limited | Real estate | 2021 |
| Fra-Carpentry Ltd | Construction | 2023 |
| Fragmentary Service Limited | Wholesale & retail | 2024 |
| Framefronic Audio Ltd | Wholesale & retail | 2025 |
| Franco Services Limited | Information & communication | 2016 |
| Frankecis Healthcare Limited | Health & social care | 2024 |
| Frasco Solutions Ltd | Health & social care | 2024 |
| Fraxcorp Ltd | Professional & scientific | 2021 |
| Frazer-Lewis Ltd | Manufacturing | 2024 |
| Free Drains Limited | Administrative & support | 1999 |
| Freehand Logistics Limited | Water & waste | 2026 |
| Freemain Systems Ltd | Wholesale & retail | 2006 |
| Freemann Limited | Wholesale & retail | 2025 |
| Freeway Autos Limited | | 1985 |
| Freight Transporter Ltd | Transport & logistics | 2024 |
| Frelins Farm Limited | Agriculture & fishing | 2004 |
| Fresh Start Pathway CIC | Other services | 2025 |
| Freshfield Microwave Group Limited | Financial services | 2020 |
| Friday Hill House RTM Company Limited | Households | 2024 |
| Friday Hill Properties Ltd | Real estate | 2022 |
| Friendly Cafe Eastham Ltd | Hospitality | 2024 |
| Friends Convenience Store and News Limited | Wholesale & retail | 2018 |
| Friends of Lions Ltd. | Wholesale & retail | 1995 |
| Frontiere Medicale Europe Ltd | Wholesale & retail | 2013 |
| Frontline Sales Limited | Extraterritorial | 2007 |
| Frontrival Limited | | 1986 |
| FSC Properties Limited | Real estate | 2024 |
| Fttl Ltd | Other services | 1999 |
| Fuju (UK) Limited | Professional & scientific | 2013 |
| Fuju Services Limited | Professional & scientific | 2018 |
| Fulcrum (Europe) Limited | | 1983 |
| FUN in a Box Ltd | Wholesale & retail | 2008 |
| FUN Prime Ltd | Wholesale & retail | 2025 |
| Funding Benchmarks Limited | Information & communication | 2004 |
| Funding Gateways Ltd | Information & communication | 2025 |
| Funky Services Limited | Administrative & support | 2007 |
| Funmiadun Private GP Limited | Health & social care | 2024 |
| Fuse Security Ltd | Administrative & support | 2025 |
| Fusetex Limited | Manufacturing | 2005 |
| Fusion Incorporated UK Ltd | Manufacturing | 2018 |
| Fusion Motors Ltd | Wholesale & retail | 2019 |
| Fusioncrate Limited | Hospitality | 2025 |
| Fusionflare Emirates Ltd | Wholesale & retail | 2026 |
| Future Ecom Store Ltd | Wholesale & retail | 2026 |
| Future Finance & Leasing Limited | Financial services | 2004 |
| Futurotics Limited | Wholesale & retail | 2026 |
| FV Conservatories & Windows Ltd | Construction | 2006 |
| Fwtzfi Ltd | Information & communication | 2025 |
| Fyfield Fine Foods Limited | Wholesale & retail | 2002 |
| Fyrepower Associates Limited | Health & social care | 2002 |
| G & C Timber & Joinery Limited | Wholesale & retail | 2001 |
| G & G Essex Developments Limited | Construction | 2006 |
| G & J Consultants Ltd | Administrative & support | 2007 |
| G & K Electrical/Catering Equipment Contractors Limited | | 1993 |
| G & P Bodyworks Ltd | Wholesale & retail | 2001 |
| G & S Estates Ltd | Real estate | 2004 |
| G & S Sheen Limited | Real estate | 2002 |
| G a a P Real Estate Limited | Real estate | 2005 |
| G B Windows Limited | Construction | 1997 |
| G C Carter Brickwork Limited | Construction | 2003 |
| G Forshaw Flooring Limited | Construction | 2014 |
| G J Brown Ltd | Arts & recreation | 2003 |
| G J Fuller Builders Limited | Construction | 2007 |
| G Penna Ltd | Financial services | 2008 |
| G R S Building Services Limited | Professional & scientific | 1997 |
| G S Food & Wine Limited | Wholesale & retail | 2004 |
| G S Mason Electrical Services Limited | Construction | 1999 |
| G Steadman Builders (Developments Division) Limited | Wholesale & retail | 2001 |
| G T L Interiors Ltd | Construction | 2002 |
| G T Welding Limited | Construction | 2004 |
| G W SPV 1 Ltd | Real estate | 2021 |
| G&G Automotive Services Limited | Wholesale & retail | 2025 |
| G&G Domus Ltd | Real estate | 2022 |
| G. & B. Finch Limited | Mining & quarrying | 1973 |
| G. Dale Designs Limited | Manufacturing | 1979 |
| G. Herbert Installations Limited | Construction | 2004 |
| G. K. Claire Limited | Real estate | 1978 |
| G.A.F. Heley (Properties) Limited | Real estate | 1992 |
| G.A.W Design Limited | Construction | 2005 |
| G.B. Repair Services Ltd | Wholesale & retail | 2000 |
| G.C.S. Bodywork Ltd | Health & social care | 2002 |
| G.D. Automatic Machinery Limited | Manufacturing | 1987 |
| G.Egboka Limited | Health & social care | 2024 |
| G.H2O Ltd | Construction | 2021 |
| G.J.Garrett & Sons,Limited | Extraterritorial | 1919 |
| G.M.E. Permanent Way Services Limited | Transport & logistics | 2000 |
| G.N.S. Lift Installations Limited | Professional & scientific | 2007 |
| G.P. Garden & Property Services Limited | Administrative & support | 2008 |
| G.T. Hammond Limited | Construction | 2002 |
| G.V. Associates Limited | | 1986 |
| G.W. Cowler Precision Engineers Ltd | Manufacturing | 2002 |
| G.W.S. Precision Sheet Metal Limited | Manufacturing | 1964 |
| G.W.Smith & Sons(Battlesbridge)Limited | Hospitality | 1938 |
| G1DTI Consultancy Ltd | Administrative & support | 2025 |