| FR UK Holdco 1 Limited | Real estate | 2019 |
| FR8 Technology Limited | Professional & scientific | 2022 |
| Fracht Holdings Limited | Transport & logistics | 2026 |
| Fracht UK Limited | Transport & logistics | 1997 |
| Fracino Limited | Manufacturing | 2000 |
| Fradley Arms Holdings Ltd | Real estate | 2024 |
| Fradley Fabrications Limited | Manufacturing | 1991 |
| Fragrance Compagnie Ltd | Wholesale & retail | 2025 |
| Fragrance Fantasy Ltd | Wholesale & retail | 2024 |
| Fragrance of Madina Limited | Wholesale & retail | 2023 |
| Fragrance Selection (UK) Limited | Manufacturing | 2012 |
| Fragrance Selection Limited | Manufacturing | 2007 |
| Fragrance Tree Ltd | Manufacturing | 2018 |
| Fragrime Limited | Wholesale & retail | 2026 |
| Fraicore Ltd | Professional & scientific | 2016 |
| Fralex Holdings Ltd | Real estate | 2025 |
| Framan Systems Limited | Professional & scientific | 2013 |
| Frame Fresh Solutions Ltd | Administrative & support | 2025 |
| Frameforce Limited | Manufacturing | 2024 |
| Frametec Limited | Manufacturing | 2011 |
| Framework Four Holdings Ltd | Real estate | 2022 |
| Framtid Ltd | Wholesale & retail | 2024 |
| Fran UK Ltd | Wholesale & retail | 2025 |
| Francatt Ltd | Other services | 2019 |
| France Soft LP | | 2015 |
| Franch(Ind) Ltd | Professional & scientific | 2024 |
| Franchise Directory Ltd | Professional & scientific | 2021 |
| Franchise My Business Limited | Information & communication | 2020 |
| Franchise With US Ltd | Administrative & support | 2023 |
| Franchiseco Ltd | Hospitality | 2018 |
| Franchises Global Ltd | Information & communication | 2020 |
| Franchising Worldwide Ltd | Real estate | 2020 |
| Francis Estates Ltd | Real estate | 2019 |
| Francis Mahfooz Ltd | Professional & scientific | 2021 |
| Francis Parker Land Limited | Extraterritorial | 1961 |
| Francis Parker Limited | Extraterritorial | 1988 |
| Francis Property Investment Limited | Real estate | 2023 |
| Francis Rail Limited | Manufacturing | 2018 |
| Franck-Steier Price Limited | Real estate | 2011 |
| Francoch Ltd | Public administration | 2026 |
| Francof Glam Ltd | Wholesale & retail | 2026 |
| Franconia Holding Limited | Administrative & support | 2015 |
| Francus Familia Ltd | Wholesale & retail | 2025 |
| Francy’S Hot & Fresh Ltd | Hospitality | 2026 |
| Frangipani Contracting Ltd | Other services | 2023 |
| Frango Grelhado Limited | Hospitality | 2020 |
| Franhen Consultancy Ltd | Professional & scientific | 2018 |
| Frank & Co. Consulting Group Ltd | Administrative & support | 2016 |
| Frank Allart & Company Limited | Manufacturing | 1945 |
| Frank and Parker Estates Ltd | Real estate | 2024 |
| Frank Castle Group Ltd | Construction | 2025 |
| Frank Dudley Holdings Limited | Professional & scientific | 2003 |
| Frank Dudley Investments Ltd | Professional & scientific | 2025 |
| Frank Dudley Limited | Manufacturing | 1980 |
| Frank England & Co. Limited | Manufacturing | 1961 |
| Frank Nutt Properties Limited | Real estate | 2020 |
| Frank Nutt Sewing Machines Limited | Wholesale & retail | 2015 |
| Frank Usher (UK) Ltd | Wholesale & retail | 2011 |
| Frank Usher Ltd | Wholesale & retail | 2011 |
| Frankel Property Ltd | Real estate | 2020 |
| Frankfurt Christmas Market Ltd | Administrative & support | 2013 |
| Frankie's Lucky Food Ltd | Hospitality | 2024 |
| Frankies Investments & Technologies Ltd | Information & communication | 2019 |
| Frankies Pizza Ltd | Hospitality | 2025 |
| Frankies Technologies Ltd | Information & communication | 2019 |
| Frankie’S Pizzaa Ltd | Hospitality | 2025 |
| Frankincense Light Ltd | Wholesale & retail | 2025 |
| Franking Machine Supplies Ltd | Administrative & support | 2022 |
| Frankley Packaging Co. Limited | Wholesale & retail | 1986 |
| Franklin and Dunbar Limited | Professional & scientific | 2025 |
| Franklin Asset Group Ltd | Financial services | 2024 |
| Franklin Gruppe Ltd | Information & communication | 2012 |
| Franklin Hodge Industries Limited | Manufacturing | 2004 |
| Franklin Hodge Limited | Professional & scientific | 2001 |
| Franklinengineeringservices Ltd | Manufacturing | 2025 |
| Franklins Technical Engineering Ltd | Manufacturing | 2023 |
| Franko Ltd | Health & social care | 2024 |
| Franks Canteen Limited | Hospitality | 2014 |
| Frankson Limited | Extraterritorial | 2012 |
| Franmay Limited | Real estate | 2025 |
| Fransys Technology Consulting Ltd | Information & communication | 2024 |
| Frapper Studio Ltd | Professional & scientific | 2024 |
| Fraser Russell Limited | Professional & scientific | 2003 |
| Fratelli Cafe Ltd | Hospitality | 2025 |
| Frater Enterprises Limited | Professional & scientific | 2003 |
| Frbf Design Ltd | Construction | 2016 |
| FRC Services Ltd | Construction | 2021 |
| Frcr Review Ltd | Education | 2026 |
| FRD Associates Limited | Administrative & support | 2011 |
| FRD Investments Ltd | Real estate | 2017 |
| Frecynth Limited | Health & social care | 2021 |
| Fred and Sons Consultancy Limited | Professional & scientific | 2023 |
| Fred Parkin Limited | Wholesale & retail | 2004 |
| Fred&Co Developments Ltd | Real estate | 2024 |
| Freddie's Valeting Centre Limited | Other services | 2016 |
| Frederic Bittiner Limited | Professional & scientific | 2020 |
| Frederic Tiles Limited | Manufacturing | 2021 |
| Frederick Ayeh Ltd | Wholesale & retail | 2025 |
| Frederick Cooper (Birmingham) Limited | Administrative & support | 1982 |
| Frederick Cooper Automotive Limited | Wholesale & retail | 2013 |