| Fairhome Property Investments Ltd | Real estate | 2014 |
| Fairmay Investments Ltd | Extraterritorial | 2014 |
| Fairmont Property Assets Limited | Real estate | 2017 |
| Fairmont(Uk) Ltd | Other services | 2014 |
| Fairtrade Direct UK Ltd | Wholesale & retail | 2021 |
| Fairtrade Imports (UK) Ltd | Wholesale & retail | 2009 |
| Falcon Financial Ltd | Extraterritorial | 2015 |
| Falcon Sulphur Limited | Administrative & support | 2005 |
| Falcona Properties Limited | Professional & scientific | 2013 |
| Falconbridge Limited | Professional & scientific | 2008 |
| Falkland Management Company Limited | Households | 1979 |
| Family Convenience Store Limited | Wholesale & retail | 2014 |
| FAN FAM. Limited | Construction | 2020 |
| Fanfavemedia Limited | Professional & scientific | 2024 |
| Fanica Servicess Ltd | Transport & logistics | 2024 |
| Fantasy Balls Limited | Administrative & support | 2025 |
| Farawise Solutions Limited | Professional & scientific | 2025 |
| Farber Estates Limited | Wholesale & retail | 2020 |
| Farber’S Investment Limited | Real estate | 2018 |
| Farchannel 2 Limited | Extraterritorial | 2016 |
| Farchannel Ltd | Extraterritorial | 2013 |
| Farewell Theatre C.I.C. | Administrative & support | 2020 |
| Farlam Landcare Ltd | Water & waste | 2023 |
| Farlam Properties Limited | Real estate | 2015 |
| Farm Fresh Manchester Limited | Wholesale & retail | 2025 |
| Farm LEW Investments Ltd | Real estate | 2021 |
| Farmacy Bakewell | Wholesale & retail | 2020 |
| Farnford Ltd | Extraterritorial | 2002 |
| Farnham Neches Ltd | Extraterritorial | 2025 |
| Faroe Limited | Wholesale & retail | 2022 |
| Farringdon Anthony Estates Limited | Other services | 2025 |
| Farringdon ROW SPV Limited | Real estate | 2024 |
| Fasha Locum Ltd | Public administration | 2025 |
| Fashion Cave Ltd | Wholesale & retail | 2023 |
| Fashion Review Ltd | Manufacturing | 2025 |
| Fasin Trading Limited | Financial services | 2026 |
| Fast Gaming Ltd | Wholesale & retail | 2018 |
| Fast LET Housing Limited | Real estate | 2013 |
| Fast Steelfixing Limited | Construction | 2020 |
| Fastmike Transport Limited | Transport & logistics | 2013 |
| Fastr Property Limited | Information & communication | 2017 |
| Favore Didio Limited | Health & social care | 2015 |
| Faye Goldman Consulting Limited | Professional & scientific | 2026 |
| Faye Moore Limited | Professional & scientific | 2023 |
| Fazezone Limited | Professional & scientific | 2024 |
| FC2015 Limited | Professional & scientific | 2015 |
| FD Capital Holdings Ltd | Real estate | 2026 |
| FDT (Holdings) Ltd | Extraterritorial | 2002 |
| FDT Associates Ltd | Extraterritorial | 1996 |
| Fedde Googa Limited | Education | 2022 |
| Feedo Ltd | Wholesale & retail | 2019 |
| Feenixkoncepts Limited | Real estate | 2024 |
| FEI DA Logistic Ltd | Transport & logistics | 2017 |
| Feico Estates Ltd | Real estate | 2025 |
| Feico Ltd | Real estate | 2024 |
| Feico Services Ltd | Health & social care | 2024 |
| Felicia Concept Limited | Administrative & support | 2025 |
| Fellview Estates Ltd | Extraterritorial | 1998 |
| Felnex Estate Nominees Ltd | Professional & scientific | 2019 |
| Femme Trade Limited | Wholesale & retail | 2015 |
| Fenland View Management Company Limited | Households | 2024 |
| Fennel Studios Ltd | Information & communication | 2026 |
| FER Global Services Ltd | Transport & logistics | 2025 |
| Feratom Ltd | Professional & scientific | 2024 |
| Fern Fitness Ltd | Manufacturing | 2024 |
| Fernbank ROW Management Company Limited | Households | 2021 |
| Feter Estates Limited | Real estate | 2024 |
| Feter Simcha Estates Ltd | Real estate | 2023 |
| Feter Simcha Limited | Real estate | 2023 |
| FF Estates Group Ltd | Real estate | 2026 |
| FF Executive Chauffeurs Ltd | Transport & logistics | 2025 |
| FFH Educational Trust | Education | 2009 |
| FG Serrvices Limited | Administrative & support | 2025 |
| FG Victoria House Commercial Limited | Construction | 2022 |
| FG Victoria House Ltd | Construction | 2017 |
| FGP Trading Lime Ltd | Wholesale & retail | 2025 |
| FGR Limited | Information & communication | 2024 |
| FH Martins Ltd | Professional & scientific | 2026 |
| Fhem Homes Limited | Construction | 2025 |
| Fidelis Advisors Ltd | Professional & scientific | 2024 |
| Fidelis House Ltd | Professional & scientific | 2026 |
| Fidira Ltd | Manufacturing | 2024 |
| Fieldgrove Estates Ltd | Real estate | 2002 |
| Fieldhead Media Limited | Professional & scientific | 2015 |
| Fields END Estates Limited | Professional & scientific | 2023 |
| Fierra Partners Limited | Administrative & support | 2025 |
| Fifteenuk Limited | Wholesale & retail | 2022 |
| Fifty Worsley Road Limited | Real estate | 1960 |
| FIFTY5IVE QN Street Management Company Limited | Households | 2022 |
| FIG Crescent Properties Ltd | Real estate | 2025 |
| Fildata Ltd | Information & communication | 2024 |
| Filemall Ltd | Wholesale & retail | 2020 |
| Filey Foundation Ltd | Health & social care | 2008 |
| Filey Holdings Limited | Real estate | 2015 |
| Filipino Store Limited | Wholesale & retail | 2020 |
| Films NOT Words Limited | Information & communication | 2023 |
| Filmtec Water UK Ltd | Wholesale & retail | 2024 |
| Filter Flair UK Limited | Wholesale & retail | 2020 |
| FIN Accountancy Ltd | Professional & scientific | 2025 |
| Finance Admin Ltd | Professional & scientific | 2024 |