| Frem Group Limited | Professional & scientific | 2000 |
| Frem Limited | Manufacturing | 2000 |
| French Affaire Ltd | Hospitality | 2018 |
| Frentro Media Holdings Limited | Extraterritorial | 2017 |
| Fresenius Medical Care Renal Services (UAE) Limited | Health & social care | 1992 |
| Fresh Cherry London Limited | Wholesale & retail | 2019 |
| Fresh Coffee 2GO Limited | Wholesale & retail | 2018 |
| Fresh Eatery Ltd | Hospitality | 2021 |
| Fresh Finish Commercial Painting Ltd | Construction | 2025 |
| Fresh Fitness Food Limited | Manufacturing | 2011 |
| Fresh Food Solutions Ltd | Hospitality | 2022 |
| Fresh Inspiration | Education | 2005 |
| Fresh Phones Ltd | Information & communication | 2020 |
| Fresh PIC Ltd | Wholesale & retail | 2023 |
| Fresh Salads Limited | Wholesale & retail | 2008 |
| Fresh Talents Ltd | Information & communication | 2012 |
| Freshco Trading Ltd | Wholesale & retail | 2017 |
| Freshcraft Farms Limited | Agriculture & fishing | 2025 |
| Freshfetch Ltd | Manufacturing | 2017 |
| Freshion Ltd | Wholesale & retail | 2024 |
| Freshkey Ltd | Administrative & support | 2025 |
| Freshnfriendly Ltd | Wholesale & retail | 2025 |
| Freshstart Refurbishment Ltd | Construction | 2024 |
| Freshwater Wills Limited | Other services | 2011 |
| Freyja Aesthetics Limited | Other services | 2026 |
| Freyral Technology Co., Limited | Information & communication | 2020 |
| Friday Entertainment Ltd | Information & communication | 2025 |
| Fridge Service Company London Ltd | Manufacturing | 2016 |
| Friendly BAT Co Ltd | Wholesale & retail | 2026 |
| Friends Assets Ltd. | Real estate | 2017 |
| Friends of the Caribbean | Other services | 2008 |
| Friends United Cricket Limited | Arts & recreation | 2010 |
| Friesandrice Limited | Hospitality | 2021 |
| Fringe Tech Ltd | Information & communication | 2018 |
| Frisskin Ltd | Information & communication | 2024 |
| Fritas Properties Limited | Real estate | 2025 |
| Frith Consultancy Limited | Professional & scientific | 2005 |
| Frmd Studio Limited | Wholesale & retail | 2020 |
| Frobishers Juices (Holdings) Limited | Professional & scientific | 2012 |
| Frobishers Juices Limited | Wholesale & retail | 1999 |
| Frog Squad WN Ltd | Information & communication | 2026 |
| Frog Street Developments Limited | Real estate | 2018 |
| Froggy EYE Ltd | Information & communication | 2025 |
| Frogitum Estates Limited | Real estate | 2021 |
| Froglet Productions Limited | Professional & scientific | 2011 |
| Frolic Lighting Ltd. | Wholesale & retail | 2005 |
| From Ethel With Love Limited | Manufacturing | 2025 |
| From the Hatch Limited | Hospitality | 2024 |
| Fronius U.K. Limited | Manufacturing | 2009 |
| Front Light Media Ltd | Arts & recreation | 2021 |
| Frontal Lobe Ltd | Information & communication | 2011 |
| Frontier Technology Ltd | Information & communication | 2004 |
| Frontline Construction Recruitment Limited | Administrative & support | 2007 |
| Frost Hire Ltd | Administrative & support | 2014 |
| Frostincluded Limited | Professional & scientific | 2015 |
| Frosts Auto Services Ltd | Health & social care | 2026 |
| Frosts Care Ltd | Health & social care | 2025 |
| Frosts Cleaning Services Ltd | Administrative & support | 2024 |
| Frosts Pest Control Ltd | Administrative & support | 2023 |
| Frosts PR Ltd | Construction | 2025 |
| Frosts Properties Ltd | Real estate | 2023 |
| Frowsbury Design Limited | Professional & scientific | 2024 |
| Fruit Tree Holdings Limited | Financial services | 2025 |
| FRY & Brown Limited | Administrative & support | 2018 |
| FS Networks Limited | Information & communication | 2015 |
| FS1 Motors Limited | Transport & logistics | 2025 |
| Fscl Properties Ltd | Real estate | 2023 |
| Fscl Technologies Ltd | Wholesale & retail | 2025 |
| Fsco Creations Limited | Hospitality | 2025 |
| Fselwood Limited | Health & social care | 2024 |
| FSG Build Limited | Real estate | 2009 |
| FSG Estates Ltd | Real estate | 2018 |
| FSG Property Services Limited | Construction | 2002 |
| FSG Services Group Ltd | Construction | 2023 |
| Fsph Ltd | Construction | 2022 |
| FTA Investments Limited | Real estate | 2019 |
| Ftis Consulting Ltd | Information & communication | 2014 |
| Ftjump Ltd | Information & communication | 2026 |
| FTL Consulting Ltd | Information & communication | 2016 |
| FTM Management Ltd | Real estate | 2025 |
| FTR Consulting Limited | Professional & scientific | 2014 |
| FTS Capital Limited | Extraterritorial | 2023 |
| FTS Capital Partners Ltd | Financial services | 2020 |
| FTS Merit Limited | Construction | 2020 |
| FTS Recovery Limited | Professional & scientific | 2022 |
| Ftunesolutions Limited | Information & communication | 2017 |
| FU Yuan Chang Ltd | Hospitality | 2024 |
| Fubulous Limited | Transport & logistics | 2021 |
| Fuchsia Bidco Limited | Financial services | 2024 |
| Fuchsia Holdco Limited | Financial services | 2024 |
| Fuchsia Midco Limited | Financial services | 2024 |
| Fudgy Gaming Ltd | Information & communication | 2018 |
| FUELCARDS4U Ltd | Wholesale & retail | 2004 |
| Fuelled by Brothers LLP | | 2026 |
| Fuelled by Xpress Coffee Ltd | Hospitality | 2022 |
| Fuerte Consultancy Ltd | Professional & scientific | 2020 |
| Fugensol Limited | Wholesale & retail | 2021 |
| Fuji Health Ltd | Wholesale & retail | 2017 |
| Fulcrum Accountants Limited | Extraterritorial | 2018 |
| Fulcrum Chambers Limited | Professional & scientific | 2010 |