| Fowkes Groundworks Ltd | Construction | 2019 |
| Fowkes Home Improvements Ltd | Construction | 2019 |
| Fowkes Roofing Ltd | Construction | 2019 |
| Fowler Smith & Jones Trust | Real estate | 2009 |
| Fowowe Kitchen Limited | Hospitality | 2024 |
| FOX Motorsport Limited | Professional & scientific | 2008 |
| FOX Piercing Ltd | Other services | 2023 |
| Fox&Fox Property Development Ltd | Real estate | 2022 |
| Foxgate Catering Ltd | Hospitality | 2025 |
| Foxwell Trading Limited | Water & waste | 2023 |
| FP Auto Club Ltd | Wholesale & retail | 2026 |
| FP Support Provisions Ltd | Health & social care | 2025 |
| FPK Utilities Limited | Energy | 2018 |
| Fpso Consulting Limited | Professional & scientific | 2022 |
| Framar Developments Limited | Construction | 1986 |
| Framar Fisheries Limited | Agriculture & fishing | 2023 |
| Francesca Cerletti & Co Ltd | Professional & scientific | 2020 |
| Francesca Grima Limited | Extraterritorial | 2019 |
| Francis George Limited | Real estate | 2025 |
| Frank Ladkin LLP | | 2006 |
| Frankis Porter 2014 Ltd | Real estate | 2014 |
| Franklin Gardens (Darwin Green) Management Company Limited | Households | 2023 |
| Franksid Holdings Limited | Real estate | 2017 |
| Fraser Investments Limited | Financial services | 2016 |
| Frazer Block C Freeholders Ltd | Households | 2010 |
| Frcpath Ltd | Education | 2011 |
| Frederick Lewis Limited | Administrative & support | 2016 |
| Free Spirit Properties Ltd | Real estate | 2022 |
| FREE-2-TRAVEL Holidays Limited | Hospitality | 2024 |
| Freedom BC Ltd | Professional & scientific | 2023 |
| Freedom Medical Ltd | Health & social care | 2024 |
| Freelancing Services Ltd | Real estate | 2024 |
| Fremont Investments Limited | Real estate | 2004 |
| Fresh Packes Pickles Essex Ltd | Hospitality | 2024 |
| Fresh Pome Limited | Wholesale & retail | 2017 |
| Friars Court Management Company Limited | Households | 2004 |
| Friars Pits Limited | Mining & quarrying | 2015 |
| Frisson Creative Limited | Professional & scientific | 2016 |
| Frithwood Tree Consultancy Limited | Administrative & support | 2025 |
| Frong Limited | Health & social care | 2014 |
| Frontmedia Studio Limited | Information & communication | 2003 |
| Frost Property Group Ltd | Financial services | 2023 |
| Frost Residential Holding Ltd | Financial services | 2026 |
| Frost Residential Lettings Ltd | Real estate | 2008 |
| Frostbuild Ltd | Construction | 2010 |
| Frosted Films Ltd | Information & communication | 2025 |
| Fruit & VEG Plus Ltd | Wholesale & retail | 2023 |
| Fryer Financial Limited | Financial services | 2002 |
| Fryer Investment Limited | Professional & scientific | 2008 |
| Fryerning Mews Management Limited | Other services | 2026 |
| FSE Online Limited | Professional & scientific | 2013 |
| Ftnts Ltd | Information & communication | 2019 |
| FTR Contractors Limited | Manufacturing | 2023 |
| FU Clouds Clothings Ltd | Wholesale & retail | 2024 |
| Fuchee Ltd | Information & communication | 2025 |
| Fuelsafe Forecourts Limited | Professional & scientific | 2009 |
| Fulham Brass & Ironmongery Limited | Wholesale & retail | 2001 |
| Full Circle Compliance Ltd | Construction | 2017 |
| Full Circle Consulting Agency Limited | Professional & scientific | 2023 |
| Full Circle Ductwork Installation Ltd | Construction | 2003 |
| Fullers (Builders) Limited | Construction | 1935 |
| Fullers (Builders) Trustee Limited | Professional & scientific | 2021 |
| Fullers Investment Company Limited | Administrative & support | 2024 |
| Function Chiropractic Limited | Health & social care | 2018 |
| Fundrock Partners Limited | Financial services | 2001 |
| Funeral Recruitment Ltd | Professional & scientific | 2024 |
| Funky Bubu's Lounge Limited | Hospitality | 2021 |
| Funkykittens UK Limited | Wholesale & retail | 2025 |
| Funnel Fillers Limited | Professional & scientific | 2019 |
| Furcillo Group Ltd | Administrative & support | 2016 |
| Furlong Homes Limited | Real estate | 2016 |
| Further Care Limited | Health & social care | 2020 |
| Fusion Datamarketing Limited | Information & communication | 2010 |
| Fusion Fuels Limited | Wholesale & retail | 2018 |
| Fusion Iron Works Limited | Manufacturing | 1999 |
| Fusion Maintenance Contracts Ltd | Manufacturing | 1999 |
| Fusion Technology Solutions Limited | Wholesale & retail | 2005 |
| Fussiontec Ltd | Wholesale & retail | 2014 |
| Futura Global Ltd | Wholesale & retail | 2024 |
| Futura Land Ltd | Real estate | 2024 |
| Future Edas Limited | Professional & scientific | 2022 |
| Future Focused Homes Limited | Administrative & support | 2026 |
| Future Garage Equipment Services Ltd | Administrative & support | 2006 |
| Future Garden (Chelmsford) Limited | Wholesale & retail | 2011 |
| Future Kitchens & Bathrooms Limited | Construction | 2009 |
| Future Property Services Limited | Real estate | 2005 |
| Future State HR Ltd | Administrative & support | 2025 |
| Future Vision Training Limited | Education | 2003 |
| Futureproof Music Limited | Information & communication | 1999 |
| Futures Worldwide Limited | Wholesale & retail | 2016 |
| Futurus Squared Limited | Public administration | 2021 |
| FVB Electricals Limited | Construction | 2011 |
| Fvrd Ltd | Information & communication | 2018 |
| FX Capital MA Limited | Financial services | 2015 |
| FZ Turbard Homes Ltd | Real estate | 2025 |
| Fête Hospitality Ltd | Hospitality | 2024 |
| Fête Ltd | Hospitality | 2019 |
| G & B Finch Holdings Limited | Mining & quarrying | 1992 |
| G & B Professional Indemnity Ltd | Financial services | 2013 |
| G & E (Network) Limited | Financial services | 1995 |