| Fapuro Limited | Professional & scientific | 2019 |
| FAR and Wide Logistics Limited | Other services | 2023 |
| Farafet Ltd | Wholesale & retail | 2020 |
| Farand Group Ltd | Hospitality | 2019 |
| Farizad Ltd | Real estate | 2019 |
| Farmdoon Ltd | Hospitality | 2022 |
| Farmhouse 828 Ltd | Hospitality | 2018 |
| Farmhouse Wembley Ltd | Hospitality | 2020 |
| Farrbury Capital Partners Limited | Real estate | 2019 |
| Farrow and Pole Limited | Construction | 2012 |
| Fashion IS Psychology Ltd | Manufacturing | 2019 |
| Fast Caring and Training Services Limited | Administrative & support | 2015 |
| Fast Clean London Ltd | Administrative & support | 2025 |
| Fast Driving Test Guru Limited | Education | 2022 |
| Fast Easy Finance Ltd | Wholesale & retail | 2022 |
| Fast Grab Ltd | Transport & logistics | 2022 |
| Fast Pharma RX Ltd | Wholesale & retail | 2025 |
| Fast Printers Limited | Manufacturing | 2017 |
| Fast Track (East Africa) Ltd | Administrative & support | 2010 |
| Fast Traders Ltd | Wholesale & retail | 2024 |
| Fastbase Limited | Information & communication | 1989 |
| Fastbond Maintenance Ltd | Construction | 2017 |
| Fastheal Ashford Ltd | Wholesale & retail | 2025 |
| Fastheal Bagshot Ltd | Wholesale & retail | 2025 |
| Fastheal Ottershaw Ltd | Wholesale & retail | 2025 |
| Fastheal Pharm Ltd | Financial services | 2025 |
| Fastrack Health Ltd | Wholesale & retail | 2017 |
| Fastrack International Limited | Administrative & support | 2002 |
| Fastrems Limited | Financial services | 2020 |
| Fatcube AI Limited | Wholesale & retail | 2018 |
| Fatcube Limited | Information & communication | 2010 |
| Fathma Halal Meat Sudbury Limited | Wholesale & retail | 2026 |
| Fatima Associates Ltd | Real estate | 2024 |
| Fatima Pharma Ltd | Other services | 2016 |
| Fatiman Services Ltd | Administrative & support | 2026 |
| Faux Florist Group Ltd | Wholesale & retail | 2021 |
| Faux Florist Ltd | Wholesale & retail | 2023 |
| FB European Trading Limited | Administrative & support | 2015 |
| Fbabdalla Limited | Real estate | 2018 |
| FBE Investment Ltd | Real estate | 2024 |
| FC24 Limited | Wholesale & retail | 2025 |
| FCD Building and Maintenance Ltd | Construction | 2023 |
| FCL College (UK) Ltd | Education | 2011 |
| FCL College Limited | Education | 2001 |
| Featherlight Jewelry Ltd | Manufacturing | 2018 |
| Fechser Express Ltd | Transport & logistics | 2025 |
| Feedmehub Limited | Other services | 2018 |
| Feelings Cafe Ltd | Hospitality | 2023 |
| Feifanveguk Ltd | Wholesale & retail | 2023 |
| Felpham Court Management Limited | Real estate | 2000 |
| Felps UK Ltd | Wholesale & retail | 2026 |
| Felville Investment Co. Holdings Limited | Financial services | 2019 |
| Felville Investment Co. Limited | Wholesale & retail | 1962 |
| Felville Properties Holdings Limited | Financial services | 2019 |
| Felville Properties Limited | Real estate | 1992 |
| Fenton Recruitment Limited | Administrative & support | 2023 |
| Fenwick Car Sales Ltd | Wholesale & retail | 2025 |
| Ferdi Karatay London Ltd | Other services | 2025 |
| Ferds Media Limited | Information & communication | 2015 |
| Fernandes Renewables Ltd | Construction | 2026 |
| Feska Healthcare Group Limited | Health & social care | 2024 |
| Fessatu Ltd | Information & communication | 2025 |
| Festival Friends Network Ltd | Information & communication | 2019 |
| Feynman Technologies Ltd | Information & communication | 2022 |
| FGZ Travel Ltd | Administrative & support | 2024 |
| FH Workteam Construction Ltd | Construction | 2018 |
| Fiara Friends CIC | Administrative & support | 2024 |
| Fibre Blow Limited | Construction | 2025 |
| FIC Wembley Ltd | Wholesale & retail | 2025 |
| Ficenti Ltd | Wholesale & retail | 2019 |
| Fidawn Engineering Limited | Transport & logistics | 2018 |
| Fidelity Investments (London) Ltd | Financial services | 2022 |
| Fifty-Flip Limited | Wholesale & retail | 2002 |
| Fikr Press Ltd | Information & communication | 2024 |
| Film Factory UK (Ffuk) Ltd | Information & communication | 2023 |
| Films of London Limited | Information & communication | 2013 |
| Finance & Accounting Ltd | Professional & scientific | 2018 |
| Finance Specialist Limited | Professional & scientific | 2010 |
| Finchley Orthodontics Ltd | Health & social care | 2015 |
| Find Properties Ltd | Real estate | 2025 |
| Find Your Tour Ltd | Administrative & support | 2024 |
| Finding IT Solutions Ltd | Information & communication | 2015 |
| Findstay Ltd | Administrative & support | 2014 |
| Finest Garden Care Limited | Administrative & support | 2025 |
| Finova Ltd | Information & communication | 2016 |
| Fintal Group Ltd | Administrative & support | 2017 |
| Fintech Business Associates Limited | Information & communication | 2014 |
| Fintech Global Capital Ltd | Financial services | 2022 |
| Firas 24 Limited | Financial services | 2026 |
| Fire Alarm Safety Ltd | Construction | 2020 |
| Fireaway Taunton Limited | Hospitality | 2019 |
| Fireaway Watford Limited | Hospitality | 2019 |
| Firenze D'Italia Ltd | Hospitality | 2023 |
| Firescue Limited | Wholesale & retail | 2025 |
| First Chartered Limited | Wholesale & retail | 2005 |
| First Choice Care Limited | Health & social care | 1995 |
| First Choice Care Services Ltd | Health & social care | 1999 |
| First Choice Consultants (Wembley) Ltd | Professional & scientific | 2013 |
| First Circle Entertainment Ltd | Information & communication | 2018 |
| First Class Airline Ltd | Transport & logistics | 2014 |