| F.J. Fullick Limited | Wholesale & retail | 1975 |
| F.J. Merrill & SON Limited | Construction | 1989 |
| F.W. Harley Limited | Construction | 1993 |
| FA Café Limited | Hospitality | 2015 |
| Fab-Lifts Services Limited | Construction | 2021 |
| Fady Limited | Real estate | 2004 |
| Fagg's Fleet,Limited | | 1949 |
| Fairbank Properties Limited | Real estate | 2003 |
| Fairhall Management Consultancy Services Limited | Professional & scientific | 2003 |
| Fairline Distribution Limited | Wholesale & retail | 1987 |
| Fairrite Limited | Real estate | 1994 |
| Fairways Flats (Sandwich Bay) Limited | Households | 1968 |
| Fairways Plumbing & Heating Supplies Ltd | Construction | 2005 |
| Faith & Sisters Limited | Health & social care | 2016 |
| Faithland Care Ltd | Health & social care | 2017 |
| Falcon Security Systems South East Limited | Administrative & support | 2002 |
| Fallsbrook (London) Ltd | Administrative & support | 2003 |
| Family Pathways (Ncdr) Ltd | Professional & scientific | 2026 |
| Fangchan Limited | Real estate | 2022 |
| Fantastico Limited | Arts & recreation | 2001 |
| Fanverse London Limited | Wholesale & retail | 2018 |
| Farnborough Old Station Limited | Other services | 2007 |
| Farnleigh Limited | Real estate | 1996 |
| Farris David Limited | Arts & recreation | 2002 |
| Farsho Limited | Real estate | 2024 |
| Fastcool Imports Limited | | 1990 |
| Fastfreight International Limited | Manufacturing | 1990 |
| Fasthunt Limited | Administrative & support | 1993 |
| Fastrack UK Ltd | Transport & logistics | 2006 |
| Fatima Medics Limited | Health & social care | 2020 |
| Faulkwood Electrical Services Limited | Construction | 2019 |
| Faversham DRY - Cleaners Ltd | Other services | 2018 |
| Faversham Plant Limited | Administrative & support | 1982 |
| Faversham Plastering Limited | Professional & scientific | 2007 |
| Fawdmeen Ltd | Health & social care | 2018 |
| Fawlty Flats Limited | Real estate | 2006 |
| FBC (South East) Limited | Real estate | 2007 |
| FDP Ventures Limited | Information & communication | 2015 |
| Featherstones', Limited | Real estate | 1910 |
| Felicia Stephens Limited | Real estate | 2002 |
| Felix CSP Limited | Professional & scientific | 2004 |
| Femelle Limited | Real estate | 2022 |
| Fenzi Investments and Asset Management Ltd | Financial services | 2020 |
| Fernbank Residents Company Limited | Professional & scientific | 1982 |
| Ferndale Point Residents Association Limited | Real estate | 1969 |
| Ferngale Limited | Professional & scientific | 1995 |
| Festal International Limited | | 1980 |
| FGS Holdings Limited | Real estate | 2006 |
| Fhbc Ltd | Health & social care | 2014 |
| FI Properties Ltd | Real estate | 1995 |
| Fiaguard Limited | | 1980 |
| Fibre PR Ltd | Professional & scientific | 2003 |
| Fido Inspections Limited | Professional & scientific | 2003 |
| Fiducia Propco Limited | Real estate | 2026 |
| Fieldfayre Limited | Hospitality | 2005 |
| Fieldstone Private Capital Group Limited | Financial services | 1990 |
| Fightface Ltd | Arts & recreation | 2022 |
| Fightnight Limited | Administrative & support | 2000 |
| Filterlight Limited | Health & social care | 1982 |
| Finance NOW Limited | Financial services | 2002 |
| Finconsult Ltd | Professional & scientific | 2007 |
| Findlock Limited | Administrative & support | 1979 |
| Finlay Kearney Limited | Real estate | 1958 |
| Finnegan Restoration Ltd | Construction | 2005 |
| Fire and Security Midco 1 Limited | Financial services | 2025 |
| Fire and Security Midco 2 Limited | Financial services | 2025 |
| Fire Consultancy & Testing Limited | Professional & scientific | 1997 |
| Firstcar Firstlove Limited | Wholesale & retail | 2018 |
| Firtree Court Limited | Real estate | 2000 |
| Fisa (Great Britain) Limited | Wholesale & retail | 1974 |
| Fish on the Quay (Essex) Ltd | Hospitality | 2000 |
| Fishgate Consulting Limited | Education | 2014 |
| Fitness 1ST Ltd | Health & social care | 2022 |
| Fitzpatrick Woolmer Design and Publishing Limited | Other services | 1995 |
| Five Kemerton Road Limited | Households | 1984 |
| Five.Com Ltd. | Professional & scientific | 2000 |
| Fixture Signs (South) Limited | Construction | 2003 |
| FL Brickwork Ltd | Other services | 2020 |
| Flambeau Europlast Ltd | Manufacturing | 1975 |
| FLANAT46 Limited | Households | 2006 |
| Flaps Limited | Information & communication | 2022 |
| Flatcare Management Limited | Real estate | 2003 |
| Fleet Commercial Finance Limited | Financial services | 1988 |
| Fleet Glass Limited | Administrative & support | 2006 |
| Fletchpride Limited | | 1984 |
| Fleur DE LIS Consulting Limited | Administrative & support | 2024 |
| Flex Appeal Limited | Arts & recreation | 2003 |
| Flexalt Ltd | Professional & scientific | 2026 |
| Flexglade Property Management Company Limited | Real estate | 1991 |
| Flexiplus Investments Limited | Real estate | 1999 |
| Flexistudio Limited | Real estate | 1996 |
| Flintcote Limited | Real estate | 1976 |
| Flintdata Limited | Wholesale & retail | 2003 |
| Flocastle Limited | | 1977 |
| Flooring Design (Contracts) Limited | | 1987 |
| Flopact Ltd | Professional & scientific | 2019 |
| Florenc Wimpy Limited | Hospitality | 2024 |
| Flower Company (Blackheath) Ltd | Wholesale & retail | 2001 |
| Flowerdale Limited | | 1982 |
| FLS (Kent) Ltd | Construction | 2018 |