| FOX Club Management Ltd | Professional & scientific | 2026 |
| FOX Leon Interactive Ltd | Information & communication | 2025 |
| FOX Logistic Services Limited | Professional & scientific | 2002 |
| FOX Security Services Ltd | Administrative & support | 2025 |
| Foxes Club Franchising Limited | Administrative & support | 2009 |
| Foxhatch (Edinburgh RD) Limited | Construction | 2025 |
| Foxhatch Limited | Real estate | 2008 |
| Foxiarts Ltd | Wholesale & retail | 2025 |
| Foxplan Investments Ltd | Financial services | 2024 |
| Foxstone Trade Group Ltd | Construction | 2026 |
| Foxsy Ltd | Information & communication | 2020 |
| Foxton Cavendish Ltd | Real estate | 2014 |
| Foxwoods Residential Limited | Real estate | 2015 |
| FP Associates Limited | Professional & scientific | 1999 |
| FP Optic Ltd | Health & social care | 2014 |
| FPF Ltd | Construction | 2021 |
| FPH SPV Ltd | Real estate | 2025 |
| Fpmh Solutions Ltd | Real estate | 2023 |
| FQL Limited | Professional & scientific | 2017 |
| FR Developments Ltd | Real estate | 2020 |
| FR Maintenance Services Limited | Construction | 2018 |
| FR PVT Property Ltd | Real estate | 2024 |
| FRA Expert Ltd | Construction | 2026 |
| Fractal Solutions Limited | Information & communication | 2017 |
| Fraggle Solutions Ltd | Information & communication | 2024 |
| Fragrance Couture Limited | Wholesale & retail | 2023 |
| Fragrance Sample London Limited | Wholesale & retail | 2026 |
| Fram HGV Ltd | Transport & logistics | 2025 |
| Frame & Fame Ltd | Information & communication | 2026 |
| Frame Factory TEN Limited | Wholesale & retail | 2006 |
| Frances Maisons Ltd | Manufacturing | 2023 |
| Francis Investment Group UK Ltd | Professional & scientific | 2021 |
| Frangoz (UK) Ltd | Real estate | 2012 |
| Frangoz UK Holdings Limited | Financial services | 2019 |
| Franklie Properties Ltd | Construction | 2015 |
| Franklin Jones Associates Ltd | Real estate | 2023 |
| Franta Consulting Ltd. | Manufacturing | 2019 |
| Frantic London Ltd | Arts & recreation | 2024 |
| Frantuz Construction Ltd | Construction | 2025 |
| Franzos (UK) Ltd | Administrative & support | 2013 |
| Franzos Franchising Ltd | Hospitality | 2019 |
| Fraternity Limited | Real estate | 2025 |
| Frazens Ltd | Wholesale & retail | 2026 |
| Fred B Engineering Limited | Administrative & support | 2018 |
| Freddys of Dagenham Limited | Hospitality | 2017 |
| FREE4M Consulting Limited | Professional & scientific | 2009 |
| FREE4M Lighting Limited | Construction | 2018 |
| Freecross Limited | Health & social care | 2009 |
| Freedhold Ltd | Real estate | 2022 |
| Freedom Concierge Ltd | Administrative & support | 2025 |
| Freedom Direct Ltd | Wholesale & retail | 2022 |
| Freedom G Ltd | Real estate | 2023 |
| Freedom Lets Ltd | Real estate | 2017 |
| Freeman Property Investments Limited | Real estate | 2016 |
| Freemans Properties Ltd | Real estate | 2022 |
| Freemax Limited | Professional & scientific | 2022 |
| Freesimcard.Co.Uk Limited | Wholesale & retail | 2021 |
| Freestyle Action Ltd | Information & communication | 2024 |
| Frenfi Ltd | Information & communication | 2024 |
| Frentworth Limited | Real estate | 2020 |
| Fresco Sweets & Bakers Ltd | Hospitality | 2026 |
| Fresh & Majestic Limited | Professional & scientific | 2024 |
| Fresh & Rain Ltd | Wholesale & retail | 2023 |
| Fresh and Frozen Fish Limited | Wholesale & retail | 2023 |
| Fresh Beauty Enterprise Limited | Other services | 2022 |
| Fresh Chapter Limited | Health & social care | 2023 |
| Fresh Fish Bazar Ltd | Wholesale & retail | 2018 |
| Fresh Juice Junction Limited | Manufacturing | 2026 |
| Fresh Juice Land Ltd | Hospitality | 2026 |
| Fresh Local Ltd | Hospitality | 2021 |
| Fresh N Air Limited | Wholesale & retail | 2024 |
| Fresh Smiles Limited | Health & social care | 2014 |
| Fresh Start Cleaning Services Ltd | Administrative & support | 2020 |
| Fresh Subs Limited | Hospitality | 2006 |
| Fresh Tea Ltd | Hospitality | 2019 |
| Fresh&Fit Limited | Wholesale & retail | 2024 |
| Fresh-By Limited | Information & communication | 2025 |
| Freshport Limited | Wholesale & retail | 2011 |
| Fress Deli Limited | Hospitality | 2023 |
| FRF Soft Limited | Information & communication | 2025 |
| Friday Promotions Limited | Professional & scientific | 2016 |
| Fried HUT Limited | Hospitality | 2025 |
| Friend Traders Limited | Real estate | 2025 |
| Friendly Property Services Ltd | Real estate | 2002 |
| Friends Association Funeral Contribution UK Ltd | Health & social care | 2022 |
| Friends Butchers Ltd | Wholesale & retail | 2022 |
| Friends Flooring Ltd | Construction | 2025 |
| Friends London Limited | Hospitality | 2021 |
| Friends of Bangladesh(The) | Health & social care | 1984 |
| Frimpomaa Naturals Ltd | Wholesale & retail | 2019 |
| Frindle Ltd | Wholesale & retail | 2020 |
| Frinton Consultancy LLP | | 2006 |
| Frinton Ltd | Real estate | 2016 |
| Fritz Gerald Ulysse Publishing Ltd | Information & communication | 2026 |
| Fritzee Limited | Wholesale & retail | 2017 |
| Frobs Services Limited | Administrative & support | 2014 |
| Fromcitytoshire Limited | Administrative & support | 2021 |
| Front Holdings Ltd | Financial services | 2025 |
| Front Pose Fashions Ltd | Other services | 2016 |
| Frontida Journeys Ltd | Transport & logistics | 2021 |