| Falafel, Salad & Coffee Ltd | Hospitality | 2025 |
| Family Motorcycle Limited | Professional & scientific | 2022 |
| Family Nest CIC | Health & social care | 2024 |
| Famsat Limited | Wholesale & retail | 2019 |
| Fantini Store Limited | Wholesale & retail | 2021 |
| Faria Cafe Limited | Administrative & support | 2010 |
| Farley Electrical (Surrey) Limited | Construction | 1998 |
| Farm Cottage Cattery Limited | Hospitality | 2025 |
| Fast FIX Group Ltd | Construction | 2026 |
| Fast Response Plumbers Ltd | Construction | 2010 |
| FASTFOOD68 Limited | Hospitality | 2024 |
| Fastforward Events Ltd | Administrative & support | 2015 |
| Fatema-Zehra Properties (Crosspoint House) Limited | Real estate | 2025 |
| FD Spitfire Cafe Limited | Hospitality | 2026 |
| Feed Your Talent Ltd | Professional & scientific | 2025 |
| Feel Own Home Real Estate Ltd | Real estate | 2019 |
| Fellofly Limited | Wholesale & retail | 2023 |
| Fenload Limited | Real estate | 1998 |
| Fennergy Projects Ltd | Professional & scientific | 2025 |
| FES Facades Ltd | Construction | 2022 |
| FES Solutions Ltd | Construction | 2014 |
| Festec Limited | Wholesale & retail | 2008 |
| FHW Partnering Ltd | Professional & scientific | 2014 |
| Fibre Optic Installation Ltd | Information & communication | 2018 |
| Fifty Fathoms Limited | Professional & scientific | 2012 |
| Fighters Spirit Ltd | Information & communication | 2022 |
| Filos Developments Ltd | Real estate | 2024 |
| FIN Accounting Limited | Professional & scientific | 2023 |
| Financemadeclear Ltd | Education | 2024 |
| Finata Impex Limited | Information & communication | 2020 |
| Fincyn Ltd | Professional & scientific | 2024 |
| Fine Spec Ltd | Construction | 2024 |
| Finer Finishes Ltd | Administrative & support | 2002 |
| Finesser Ltd | Wholesale & retail | 2022 |
| Fingates Co Ltd | Real estate | 2018 |
| Finosys Solutions Limited | Information & communication | 2014 |
| Fintrek Limited | Information & communication | 2020 |
| Fire Escape Limited | Construction | 2001 |
| Fire Protection Services (Surrey) Limited | Wholesale & retail | 2002 |
| First Class Homes Ltd | Health & social care | 2015 |
| Firstpay Group Ltd | Financial services | 2021 |
| Firsttouch Cleaning Limited | Administrative & support | 2022 |
| Fischer Fire Maintenance Services Limited | Construction | 2020 |
| Fischer Maintenance Services Limited | Construction | 2008 |
| Fish Port Fish Mongers Ltd | Agriculture & fishing | 2018 |
| Fisher One Limited | Hospitality | 2013 |
| Fit Maintenance Ltd | Construction | 2023 |
| Fitspark Ltd | Construction | 2021 |
| Fitzgibbons & Company Limited | Professional & scientific | 2002 |
| Five Group (London) Limited | Construction | 2025 |
| Five Star Finance Solutions Limited | Financial services | 2025 |
| Five Zero Digital Ltd | Administrative & support | 2011 |
| Fixfit Ltd. | Construction | 2015 |
| FJ Urban Planning Limited | Professional & scientific | 2022 |
| FJK Collections & Consultancy Ltd | Other services | 2026 |
| Fjtcargo Ltd | Transport & logistics | 2023 |
| FK Growth Ltd | Manufacturing | 2026 |
| Flava Family CIC | Education | 2026 |
| Flexied Ltd | Education | 2022 |
| Flightsxbites Ltd | Information & communication | 2025 |
| Fluent Studio Ltd | Information & communication | 2004 |
| Flux Moto Ltd | Wholesale & retail | 2026 |
| FMS UK Group Ltd | Construction | 2026 |
| Focus Inventory Limited | Financial services | 2016 |
| Focus Recruitment Consultancy Limited | Administrative & support | 2019 |
| Focus Recruitment Group Limited | Administrative & support | 2019 |
| Focus Softnet Europe Ltd | Information & communication | 2025 |
| Foil Communication Limited | Information & communication | 2020 |
| Folio (UK) Limited | Administrative & support | 1989 |
| Foliouk Commercial Ltd | Administrative & support | 2013 |
| Foliouk Residential Ltd | Administrative & support | 2013 |
| Folklands Limited | Real estate | 2016 |
| Fone Accessories Ltd | Wholesale & retail | 2025 |
| Forealovers Limited | Wholesale & retail | 2009 |
| Forensic Collision Investigation and Reconstruction Ltd. | Administrative & support | 2015 |
| Forest Gate Property Services Ltd | Construction | 2022 |
| Forest Lodge Whipps Cross Ltd | Households | 1996 |
| Forever Beauty and Wellness LP | | 2016 |
| Forever Fit Programme LP | | 2016 |
| Forever Life Balance LP | | 2016 |
| Form & Fade. Ltd | Other services | 2025 |
| Formant Labs Ltd | Information & communication | 2026 |
| Format Renovations Limited | Construction | 2011 |
| Forrester Property Refresh Services Limited | Construction | 2026 |
| Forresterra Ltd | Real estate | 2023 |
| Fortmox Group Ltd | Professional & scientific | 2017 |
| Fortnum Consulting Limited | Information & communication | 2012 |
| FORTY8 Accounting Support Services Ltd | Information & communication | 2019 |
| Fosden Consulting Limited | Professional & scientific | 2013 |
| Fountain House 74 Limited | Manufacturing | 2023 |
| Fountain House 84 Limited | Manufacturing | 2023 |
| Fountain House Combined Limited | Manufacturing | 2023 |
| Four Group (London) Limited | Real estate | 2024 |
| Four Seasons Securities Limited | Financial services | 2020 |
| FOX and Stevens Property Services Ltd | Construction | 2020 |
| Foxley Lane Purley Ltd | Real estate | 2024 |
| Foxxy Properties Ltd | Real estate | 2020 |
| Frame Properties Ltd | Real estate | 2024 |
| Francis Paley Ltd | Manufacturing | 2020 |
| FRE Capital Ltd | Real estate | 2023 |