| Fantasy Gardening Ltd | Transport & logistics | 2017 |
| Farez Electrical Limited | Construction | 2008 |
| Farez Investments Limited | Real estate | 2021 |
| Farleigh Coaches Limited | Administrative & support | 2019 |
| Farleigh Forge Garage 2 Ltd | Wholesale & retail | 2026 |
| Farleigh Forge Garage Ltd | Wholesale & retail | 2002 |
| Farley Court RTM Company Limited | Households | 2003 |
| Farleys Training Ltd | Education | 2014 |
| Farm Expo Limited | Extraterritorial | 2019 |
| Farm Fresh PO (2023) Limited | Other services | 2024 |
| Farmamanaging Ltd | Administrative & support | 2021 |
| Farmers Farm Shop Limited | Wholesale & retail | 2008 |
| Farmingacre Limited | Agriculture & fishing | 1980 |
| Farthings Corner Investments Limited | Real estate | 2024 |
| Faryear Ltd | Wholesale & retail | 2012 |
| Farzana Market Ltd | Wholesale & retail | 2021 |
| Fasamvic Limited | Real estate | 2023 |
| Fash Motors Ltd | Wholesale & retail | 2025 |
| Fashion Agency Ltd | Wholesale & retail | 2021 |
| Fast & Care Limited | Transport & logistics | 2010 |
| Fast 4U Removals and Services Ltd | Transport & logistics | 2018 |
| Fast Food Falkirk Ltd | Hospitality | 2023 |
| Fast Labour Contractors Ltd | Administrative & support | 2017 |
| Fast Lane Accounting Ltd | Professional & scientific | 2025 |
| FAST2FIBRE Limited | Professional & scientific | 2014 |
| Fastline Logistic Ltd | Transport & logistics | 2023 |
| FAT Crow Photography Ltd | Professional & scientific | 2017 |
| Father COD Ltd | Hospitality | 2014 |
| Fathers Estates Ltd | Real estate | 2025 |
| Faversham Oyster Fishery Company | Agriculture & fishing | 2017 |
| Fawn Property Group Ltd | Real estate | 2026 |
| FB PTC I Limited | Administrative & support | 2022 |
| FB PTC II Limited | Administrative & support | 2022 |
| FBR Engineering Ltd | Construction | 2023 |
| FBU Estates Ltd | Real estate | 2023 |
| FCA Design Ltd | Professional & scientific | 2012 |
| FDM Link Ltd | Transport & logistics | 2026 |
| Featherstone Fish Bar Ltd | Hospitality | 2023 |
| Fedo Home Ltd | Hospitality | 2014 |
| Fedora Marketing Ltd | Wholesale & retail | 2020 |
| Felicite Maiso Ltd | Wholesale & retail | 2025 |
| Fellgrove Consultancy Ltd | Professional & scientific | 2018 |
| Fellgrove Contracting Ltd | Professional & scientific | 2015 |
| Female Football Futures Limited | Education | 2025 |
| Femkem Ltd | Construction | 2018 |
| Fenix Electrical Services Limited | Construction | 2021 |
| Ferdo Express Ltd | Transport & logistics | 2017 |
| Fergus Gillies Ltd | Professional & scientific | 2018 |
| Feridun Property Services Ltd | Real estate | 2021 |
| Fermenti Ltd | Manufacturing | 2019 |
| Fernbank Scaffolding Ltd. | Construction | 2017 |
| Ferniuk Global Ltd | Transport & logistics | 2026 |
| Ferns Aggregates Limited | Mining & quarrying | 2019 |
| Ferns Drylining Limited | Construction | 2009 |
| Ferns Drywall Limited | Construction | 2020 |
| Ferns Forestry Limited | Agriculture & fishing | 2025 |
| Ferns Group Limited | Extraterritorial | 2015 |
| Ferns Infrastructure Limited | Extraterritorial | 2024 |
| Ferns Plant Limited | Administrative & support | 2024 |
| Ferns Property Development Limited | Real estate | 1998 |
| Ferns Surfacing Limited | Construction | 1996 |
| Ferns TM Limited | Construction | 2023 |
| Feroz Brothers Limited | Real estate | 2006 |
| Ferrell Financial Limited | Financial services | 2018 |
| Ferris & Co Limited | Real estate | 2013 |
| Fescape Ltd | Construction | 2011 |
| Fetch Fire & Security Ltd | Administrative & support | 2020 |
| Fetch Security Ltd | Administrative & support | 2016 |
| Fetcha Resourcing Ltd | Administrative & support | 2022 |
| FF Services Group (Holdings) Limited | Financial services | 1980 |
| FFH Holdco Limited | Financial services | 2019 |
| FG Dreams Ltd | Wholesale & retail | 2023 |
| Field (Maidstone) Ltd | Agriculture & fishing | 2018 |
| Field Based Assessments Limited | Professional & scientific | 2017 |
| Figured OUT Accounting Ltd | Professional & scientific | 2025 |
| Fileder Filter Systems Limited | Professional & scientific | 1981 |
| Fileder Holdings Limited | Financial services | 1995 |
| Finacom Limited | Transport & logistics | 1960 |
| Finally Digital Limited | Professional & scientific | 2025 |
| Finance Factors Ltd | Financial services | 2024 |
| Finance Factors Mortgages Limited | Financial services | 2020 |
| Finance in Session Ltd | Professional & scientific | 2025 |
| Financial Connectivity Limited | Professional & scientific | 2013 |
| Financial Data Solutions Limited | Professional & scientific | 2012 |
| Financial Inclusion Advocacy Centre Limited | Professional & scientific | 2016 |
| Finch Surfacing Solutions Ltd | Construction | 2026 |
| Findercar Limited | Professional & scientific | 2026 |
| Fine Car Detailing Limited | Other services | 2009 |
| Fine Carpet Cleaning Ltd | Manufacturing | 2012 |
| Fine Figure Limited | Other services | 2024 |
| Fine Finish Carpentry & Joinery Ltd | Construction | 2012 |
| Fine London Joinery Ltd | Construction | 2020 |
| Fineco Limited | Administrative & support | 1995 |
| Finecraft Enterprises Limited | Hospitality | 2006 |
| Finelodge Limited | Households | 1995 |
| Finesport Limited | Wholesale & retail | 2005 |
| Finesse Accountancy Services Limited | Professional & scientific | 2020 |
| Finesse Aesthetics Ltd | Health & social care | 2017 |
| Finesse Paint Work Limited | Wholesale & retail | 2014 |
| Finesse Transport Services Limited | Transport & logistics | 2024 |