| Framlingham Limited | Administrative & support | 2017 |
| FRAN6HARDEY Global Concept Limited | Information & communication | 2017 |
| France Legal Limited | Professional & scientific | 2018 |
| Francesco Hair Salon Limited | Extraterritorial | 2019 |
| Francis Interiors Ltd | Construction | 2024 |
| Francis Investments East Anglia Ltd. | Construction | 2001 |
| Franco's at Roberterry Ltd | Other services | 2015 |
| Frank Nolten Limited | Professional & scientific | 1991 |
| Franklin Electric Financing UK Ltd | Financial services | 2025 |
| Franklin Electric Holdings UK Ltd | Financial services | 2012 |
| Franklin Fueling Systems Limited | Wholesale & retail | 1991 |
| Franklyn Nevard Associates Limited | Professional & scientific | 2003 |
| Franko (EA) Ltd | Real estate | 2024 |
| Frankp Services Ltd | Construction | 2025 |
| Frasers Acquisitions Limited | Real estate | 2020 |
| Frasers Lettings Ltd | Real estate | 2008 |
| Freddie Keeble Watches and Diamonds Limited | Wholesale & retail | 2011 |
| Frednett Construction Ltd | Construction | 2019 |
| Fredricks Ltd | Real estate | 2025 |
| Free Range Farm Limited | Extraterritorial | 2003 |
| Free Rein Ltd | Information & communication | 2004 |
| Free Spirit Architectural Design & Conservation Limited | Professional & scientific | 2014 |
| FREE2 FM Limited | Education | 2019 |
| Freedom Tattoo Ltd | Other services | 2019 |
| Freeform Games LLP | | 2001 |
| Freelane Ltd | Wholesale & retail | 2018 |
| Freeman Civil Engineering Ltd | Construction | 2017 |
| Freestyle (Ipswich) Limited | Other services | 2011 |
| Freestyle Landscapes Ltd | Administrative & support | 2026 |
| Freewex Limited | Administrative & support | 2023 |
| Freight Line Europe (Holdings) Limited | Professional & scientific | 2018 |
| Freight Post Express Limited | Transport & logistics | 2022 |
| Freightrading Limited | Transport & logistics | 2025 |
| French Property Legal Services Ltd | Professional & scientific | 2020 |
| French Tuition for Business & Leisure Ltd. | Professional & scientific | 2002 |
| Frenchs Farm Holiday Lodges Limited | Hospitality | 2018 |
| Fresh 'N' Crispy Ltd | Hospitality | 2024 |
| Fresh Aircon Limited | Construction | 2026 |
| Fresh Coat Studio Ltd | Construction | 2026 |
| Fresh Fillaz Limited | Wholesale & retail | 2008 |
| Fresh Finish Solutions Ltd | Construction | 2026 |
| Fresh M CUT Barber Ltd | Other services | 2026 |
| Fresh ‘N Clean Services Limited | Administrative & support | 2024 |
| Freshpet Europe Ltd | Wholesale & retail | 2017 |
| Freshwear Services Limited | Other services | 2011 |
| Freston Analytics UK Limited | Information & communication | 2022 |
| Freston Farming Limited | Agriculture & fishing | 2009 |
| Freston Marine Limited | Agriculture & fishing | 2003 |
| Freston Tower Ltd | Professional & scientific | 2026 |
| Freya Beauty Ltd | Other services | 2024 |
| Freya Five Limited | Financial services | 2014 |
| Freya Five Property Limited | Real estate | 2019 |
| Freya Roze World Limited | Manufacturing | 2021 |
| Frgd Ltd. | Extraterritorial | 2024 |
| Frida Consulting Ltd | Professional & scientific | 2025 |
| Friday Street Car Boot Sale Limited | Administrative & support | 2016 |
| Fried Chicken EN Ltd | Hospitality | 2024 |
| Friel Consulting Ltd | Professional & scientific | 2018 |
| Friends' Property Development Ltd | Real estate | 2011 |
| Friendship 23 Ltd | Hospitality | 2023 |
| Frinton Alarm Systems Limited | Construction | 2015 |
| Friss Labs UK Limited | Wholesale & retail | 2025 |
| Friston Properties (East Anglia) Ltd | Real estate | 2017 |
| Frobishers Wigs Ltd | Wholesale & retail | 2010 |
| Frog Enterprises Limited | Administrative & support | 2020 |
| From Charlie With Love CIC | Health & social care | 2025 |
| Frontfoot Ltd | Administrative & support | 2020 |
| Frost & Partners (Hadleigh) Limited | Real estate | 2004 |
| Frozen Sea Ltd | Wholesale & retail | 2020 |
| Fruchthansa UK Limited | Wholesale & retail | 2025 |
| Frugalpac 2 Limited | Professional & scientific | 2016 |
| Frugalpac Limited | Manufacturing | 2011 |
| Fruit and Vegetables Limited | Wholesale & retail | 2023 |
| Fryers Holdings Limited | Financial services | 2025 |
| Fryers Transport Ltd | Transport & logistics | 2018 |
| FS Electrical Ltd | Construction | 2017 |
| FS Prime Trading Ltd | Wholesale & retail | 2025 |
| FSH Technical Solutions (Fshts) Limited | Agriculture & fishing | 2010 |
| FSI Stump Cutters UK Limited | Agriculture & fishing | 2023 |
| FSL Holding Limited | Information & communication | 2022 |
| Fspt Care Ltd | Health & social care | 2023 |
| FTG Community Interest Company | Arts & recreation | 2025 |
| FTK Consultancy Ltd | Administrative & support | 2023 |
| Fuchsia Education Consultancy Ltd | Education | 2024 |
| Fuchsia Homecare Cleaning Ltd | Administrative & support | 2024 |
| Fuchsia Homecare Group Limited | Financial services | 2020 |
| Fuchsia Homecare Ltd | Real estate | 2015 |
| Fuchsia House Management Limited | Households | 2021 |
| Fuel Efficient Ltd | Wholesale & retail | 2013 |
| Fulcher Construction Limited | Construction | 2003 |
| Fulcher Developments Ltd | Construction | 2020 |
| Fulcher Forestry & Tree Works Ltd | Agriculture & fishing | 2018 |
| Fulcrum Engineering & Technical Limited | Construction | 2015 |
| Fulcrum UK Ltd | Real estate | 1966 |
| Fulgur Innovations Ltd | Wholesale & retail | 2025 |
| Fulham Broadway Business Improvement District Ltd | Administrative & support | 2019 |
| Full Time Solutions Ltd | Administrative & support | 2024 |
| Fullfillmate Ltd | Transport & logistics | 2026 |
| Fullpay Limited | Administrative & support | 2021 |
| Fullrays Ltd | Administrative & support | 2015 |