| FOX CUB Films Ltd. | Information & communication | 2012 |
| FOX Electrical Compliance Ltd | Construction | 2020 |
| FOX GEO Ltd | Professional & scientific | 2024 |
| FOX Mill Estates Ltd | Real estate | 2021 |
| FOX Park Developments Limited | Real estate | 2019 |
| FOX Valley Electrical Ltd | Construction | 2021 |
| FOX Valley Management Company Limited | Households | 2016 |
| FOX Valley Nail Ltd | Other services | 2022 |
| Foxacre Deals Ltd | Administrative & support | 2023 |
| Foxall and Chapman Limited | Extraterritorial | 1949 |
| Foxblade Developments & Investments Ltd | Real estate | 2022 |
| Foxdup Ltd | Wholesale & retail | 2024 |
| Foxham Booth Limited | Professional & scientific | 2016 |
| Foxhill Curry House Ltd | Hospitality | 2024 |
| Foxhill Medical Solutions Ltd | Health & social care | 2024 |
| Foxhill S6 Tandoori Ltd | Hospitality | 2021 |
| Foxholes Farm Weddings Limited | Other services | 2011 |
| Foxholes Investments Ltd | Real estate | 2019 |
| Foxlyn Limited | Real estate | 2025 |
| Foxroyd Lettings Ltd | Real estate | 2019 |
| Foxroyd Property Developments Limited | Real estate | 2016 |
| Foxwood City Living Ltd | Real estate | 2024 |
| Foxwood Electric Co Ltd | Construction | 2015 |
| Foxwood Project Solutions Ltd | Construction | 2026 |
| Foxy Nails & Spa Ltd | Other services | 2024 |
| Foxy Property Ltd | Real estate | 2021 |
| Foxy Trans Ltd | Administrative & support | 2017 |
| Foznest Limited | Wholesale & retail | 2025 |
| FP Sheff Ltd | Wholesale & retail | 2026 |
| FPC Site Painting Ltd | Other services | 2006 |
| FPT Construction Ltd | Construction | 2021 |
| FR Consulting Engineers Limited | Professional & scientific | 2005 |
| Fragrance Holdings Limited | Wholesale & retail | 2018 |
| Fragrance Oils Direct Ltd | Wholesale & retail | 2020 |
| Frame Theory Ltd | Arts & recreation | 2025 |
| Frame UP Windows Limited | Manufacturing | 2005 |
| Franador Limited | Professional & scientific | 2023 |
| Francesca Allen Consultancy Limited | Other services | 2015 |
| Franchise Logistics Limited | Professional & scientific | 2004 |
| Francis Electrical Engineers Ltd | Construction | 2026 |
| Francis Gabriel Ltd | Information & communication | 2025 |
| Francis Howard Limited | Manufacturing | 1921 |
| Francis Morris Medicolegal Reporting Limited | Health & social care | 2020 |
| Francis Pearce Partnership Limited | Administrative & support | 1996 |
| Francis Sprenger Results Ltd | Other services | 2019 |
| Frank Astling & SON Limited | Professional & scientific | 1947 |
| Frankie's Pubs Ltd | Hospitality | 2026 |
| Franklin Sign Installations Ltd | Manufacturing | 2012 |
| Frankly, Green & Webb Ltd | Arts & recreation | 2010 |
| Franklynson Developments Limited | Real estate | 2018 |
| Franks & Co (Mancunium) Limited | Professional & scientific | 2009 |
| Franks & Co (South) Limited | Professional & scientific | 2008 |
| Franks & Co Limited | Professional & scientific | 2003 |
| Fraser Associates Public Limited Company | Professional & scientific | 1982 |
| Fraso Investments Limited | Real estate | 2026 |
| Fratm Limited | Hospitality | 2026 |
| Fraya's Leisure Caravan Ltd | Hospitality | 2025 |
| Frazelli Telecomms Limited | Information & communication | 2014 |
| Frazers Coffee Roasters Ltd | Wholesale & retail | 2021 |
| Fre-Flo Holding Limited | Construction | 2024 |
| Fre-Flo Plumbing & Heating Services Limited | Construction | 1993 |
| Freak Street Ltd | Hospitality | 2023 |
| Freaky Uniquey Ltd | Wholesale & retail | 2023 |
| Frecheville Composite Doors Ltd | Construction | 2019 |
| Frecheville NCG Limited | Wholesale & retail | 2026 |
| Fred Bellhouse Limited | Hospitality | 2023 |
| Fred Charles Developments Limited | Real estate | 2020 |
| Fred Heap Ltd | Professional & scientific | 2017 |
| Freddies Fruit Store Limited | Wholesale & retail | 2018 |
| Freddy & Barney Limited | Construction | 2018 |
| Freddys Rotherham Ltd | Hospitality | 2021 |
| Frederic Cheese & Wine Limited | Wholesale & retail | 2017 |
| Fredom Limited | Financial services | 2025 |
| Fredora Medics Limited | Health & social care | 2016 |
| Free to BE YOU Limited | Health & social care | 2018 |
| Freebird Consultancy Ltd | Administrative & support | 2023 |
| Freedart Limited | Agriculture & fishing | 1996 |
| Freedom 2040 Ltd | Households | 2020 |
| Freedom Garage Limited | Administrative & support | 2003 |
| Freedom in Numbers Ltd | Professional & scientific | 2018 |
| Freedom Tech Limited | Administrative & support | 2012 |
| Freedom Technology Services Ltd | Information & communication | 2006 |
| Freedom to Speak UP Services Ltd | Administrative & support | 2024 |
| Freeman & Co Limited | Professional & scientific | 2014 |
| Freeman & Freeman Limited | Real estate | 1949 |
| Freeman Properties (UK) Limited | Households | 2011 |
| Freeman Rivington Ltd | Administrative & support | 2020 |
| Freemans Court Maintenance Limited | Households | 2007 |
| Freequadrant UK Limited | Wholesale & retail | 2025 |
| Freeston Consulting Ltd | Professional & scientific | 2026 |
| Freight Despatch Worldwide Limited | Transport & logistics | 2004 |
| Frena Solutions Ltd | Wholesale & retail | 2025 |
| Frenzy Italia Hillsborough Ltd | Hospitality | 2026 |
| Freon Limited | Information & communication | 2019 |
| Frequency Works Ltd | Construction | 2025 |
| Fresco Homes Ltd | Real estate | 2024 |
| Fresco Tasty Kebabs Limited | Hospitality | 2023 |
| Fresh Artiste Management Limited | Administrative & support | 2005 |
| Fresh Baker House Limited | Hospitality | 2024 |
| Fresh Butch Limited | Wholesale & retail | 2024 |