| FOUR40 Ltd | Arts & recreation | 2017 |
| FOUR90 Designs Ltd | Information & communication | 2024 |
| FOUR90 Holdings Ltd | Financial services | 2024 |
| Fourfound Group Ltd | Administrative & support | 2025 |
| Fourfy Digital Enterprise Ltd | Wholesale & retail | 2025 |
| Fournais,Trading & Engineering Co. Limited | Construction | 1988 |
| Fournir Events Concierge Ltd | Administrative & support | 2026 |
| Fourplus Immersive Ltd | Professional & scientific | 2020 |
| Fourseasonfindz Ltd | Wholesale & retail | 2025 |
| Fourteen Desserts Ltd | Manufacturing | 2023 |
| Fourteen Minutes Productions Limited | Information & communication | 2024 |
| Fourteen Moons Ltd | Wholesale & retail | 2024 |
| Fourthright Ltd | Information & communication | 2019 |
| Fourtru Limited | Transport & logistics | 2024 |
| Fourways Property Group Limited | Real estate | 2020 |
| Fourwood Construction Services Ltd | Construction | 2010 |
| Fowgay Hall RTM Company Ltd | Households | 2016 |
| Fowzisaleem Medical Ltd | Health & social care | 2011 |
| FOX & Goose Halal Butchers Ltd | Wholesale & retail | 2022 |
| FOX & Goose Midlands Ltd | Real estate | 2025 |
| FOX 4X4 Specialist Limited | Wholesale & retail | 2022 |
| FOX and Chance Limited | Other services | 2020 |
| FOX and Goose Motor Spares Ltd | Wholesale & retail | 2017 |
| FOX Associates | | 1986 |
| FOX Company Investments Ltd | Extraterritorial | 2024 |
| FOX Construction Group (UK) Ltd | Construction | 2021 |
| FOX Cooper Limited | Professional & scientific | 2021 |
| FOX Fabrication Limited | Other services | 2019 |
| FOX Hill Solutions Limited | Information & communication | 2014 |
| FOX Holdings (West Midlands) Ltd | Financial services | 2021 |
| FOX Hollies Carpets Limited | Wholesale & retail | 2025 |
| FOX Hollies Fish Bar Limited | Hospitality | 2024 |
| FOX Hollies Limited | Real estate | 2023 |
| FOX Industrial Services Limited | Manufacturing | 2003 |
| FOX Kalomaski Crossing Limited | Professional & scientific | 1994 |
| FOX Logistics Ltd | Transport & logistics | 2017 |
| FOX Property Management Ltd | Real estate | 2004 |
| FOX Recoveries Ltd | Financial services | 2018 |
| FOX Seller Ltd | Wholesale & retail | 2025 |
| FOX Street Holdings Ltd | Construction | 2026 |
| FOX Transport & Installations Limited | Transport & logistics | 2015 |
| FOX Vape Ltd | Wholesale & retail | 2025 |
| FOX Window Services Limited | Construction | 2022 |
| Foxall Investments Limited | Real estate | 2025 |
| Foxer Monies Limited | Administrative & support | 2020 |
| Foxfire Protection Limited | Administrative & support | 2011 |
| Foxglove Meadows Residents Management Company Limited | Households | 2020 |
| Foxholes Business Park Limited | Extraterritorial | 1987 |
| Foxhound Unit Ltd | Financial services | 2024 |
| Foxmead Limited | Financial services | 2018 |
| Foxmill Gardens (Willand) Management Company Limited | Households | 2022 |
| Foxprint (Shepshed) Limited | Manufacturing | 2006 |
| Foxsedge House Management Company Limited | Real estate | 2022 |
| Foxski Properties Ltd | Real estate | 2022 |
| Foxtree Investments Limited | Information & communication | 2016 |
| Foxwolfe Property Limited | Real estate | 2016 |
| Foxwood Software Limited | Information & communication | 2024 |
| Foxxmans Limited | Wholesale & retail | 2018 |
| Foxxmoto Limited | Wholesale & retail | 2019 |
| Foxy Lasers Ltd | Manufacturing | 2024 |
| FOY and Fraser Ltd | Professional & scientific | 2011 |
| Foyle View Construction Limited | Construction | 2015 |
| Foyle View Contractors Ltd | Construction | 2021 |
| Foys Construction Ltd | Construction | 2026 |
| Foysol Spice Ltd | Hospitality | 2021 |
| FOZ Boutique UK Ltd | Wholesale & retail | 2026 |
| Fozia Arif Ltd | Wholesale & retail | 2024 |
| Fozia Kitchen Limited | Hospitality | 2025 |
| Fozia's Hair and Beauty Ltd | Other services | 2021 |
| FP Biogenic Ltd | Professional & scientific | 2022 |
| FP Exeter Limited | Hospitality | 2026 |
| FP Horden Limited | Hospitality | 2025 |
| FP Noble Ltd | Real estate | 2026 |
| FP Scheme Trustees Ltd | Financial services | 2014 |
| FPA Future Property Assets Ltd | Real estate | 2020 |
| FPD Construction Limited | Construction | 2019 |
| FPD Logistics Ltd | Transport & logistics | 2019 |
| FPH Holdings Limited | Real estate | 2016 |
| FPH Properties Limited | Real estate | 2025 |
| FPI Capital Ltd | Real estate | 2016 |
| FPI Partners Limited | Real estate | 2020 |
| Fpib Limited | Real estate | 2022 |
| FPM Cutting Solutions Ltd | Manufacturing | 2022 |
| FPM Property Management Ltd | Real estate | 2022 |
| FPM UK Limited | Manufacturing | 2021 |
| FPS Builds&Drive Ltd | Construction | 2025 |
| FPS Distribution Limited | Wholesale & retail | 2001 |
| FPS Fitness Ltd | Arts & recreation | 2018 |
| Fps-Gb Ltd | Construction | 2022 |
| Fpuk Lighting Ltd | Information & communication | 2016 |
| FQ Financials Ltd | Professional & scientific | 2013 |
| FQF Ventures Limited | Wholesale & retail | 2026 |
| FR Contractors Ltd | Construction | 2021 |
| FR Motors Garage Ltd | Wholesale & retail | 2024 |
| FR Motors MOT Ltd | Wholesale & retail | 2020 |
| FR Regis Limited | Hospitality | 2021 |
| FR Retail Solutions Ltd | Wholesale & retail | 2025 |
| FR Success Ltd | Wholesale & retail | 2026 |
| FR Traders Ltd | Wholesale & retail | 2025 |
| FR UK Consultants Limited | Professional & scientific | 2022 |