| Florin PFD Trans Ltd | Transport & logistics | 2018 |
| Flow Right Limited | Construction | 2018 |
| Flow Tech Kent Ltd | Construction | 2023 |
| Flower Close Limited | Real estate | 2023 |
| Flowin Energy Resources Ltd | Real estate | 2019 |
| Flowtemp Ltd | Construction | 2021 |
| Fluid-Air Components Limited | Financial services | 2014 |
| Fluid-Air Holdings Limited | Financial services | 2022 |
| Flushaway Drainage Ltd | Water & waste | 2024 |
| FLY (FU LAI) Aviation Ltd. | Arts & recreation | 2014 |
| Flywolf Ltd | Information & communication | 2019 |
| FM Esports Ltd | Arts & recreation | 2012 |
| FMB Insurance Services Ltd | Other services | 1980 |
| FMB Training Services Limited | Administrative & support | 2011 |
| FMC Group Ltd | Manufacturing | 2018 |
| FMC Packaging Ltd | Administrative & support | 2016 |
| FMC Projects Ltd | Construction | 2011 |
| Foalua Ltd | Real estate | 2021 |
| Focus Creative Media Ltd | Information & communication | 2020 |
| Foldip Consult Limited | Information & communication | 2018 |
| FOM & Toms Ltd | Health & social care | 2013 |
| Food & Beverage Export Spain Limited | Wholesale & retail | 2022 |
| Footballing Superstars Limited | Arts & recreation | 2020 |
| Footprint Living Limited | Construction | 2026 |
| Force & Leisure Limited | Arts & recreation | 2006 |
| Forestdale Limited | | 1985 |
| Forever Floors Ltd | Other services | 2015 |
| Forever Mary Rose Limited | Health & social care | 2009 |
| Forfinco Ltd | Professional & scientific | 2019 |
| Forge Lane Holdings Ltd | Financial services | 2025 |
| Formby Land Limited | Real estate | 2019 |
| Formulae Lifestyle Ltd | Wholesale & retail | 2025 |
| Forrow Law Limited | Extraterritorial | 2013 |
| Forstal Beauty Cabin Ltd | Other services | 2025 |
| Fort Advisory Limited | Professional & scientific | 2020 |
| Fort Borstal Holdings Limited | Financial services | 2023 |
| Fort Clarence Limited | Households | 2002 |
| Fortisratio Limited | Financial services | 2007 |
| Fortissimo Limited | Wholesale & retail | 2025 |
| Fortress Consult Ltd | Professional & scientific | 2012 |
| Fortress Learning 'N' Skills | Education | 2011 |
| Forty One Bars Limited | Hospitality | 2024 |
| Forty One Property Investment Limited | Real estate | 2023 |
| Forty One Property Lettings Limited | Real estate | 2023 |
| Foster Enterprises Ltd | Manufacturing | 2008 |
| Foster Roofing & Cladding Ltd | Construction | 2025 |
| Fotev 89 Ltd | Transport & logistics | 2020 |
| Foundation Homes Ltd | Real estate | 2017 |
| Four Blue Recruitment Ltd | Administrative & support | 2015 |
| Four Dreams Ltd | Information & communication | 2024 |
| Four Elms Place Management Company Limited | Households | 2018 |
| Four Elms Service Station Limited | Wholesale & retail | 1967 |
| Four Seasons Engineering Ltd | Construction | 2016 |
| Four Tee's Business Solution Ltd | Professional & scientific | 2015 |
| Fourmost Fixings Limited | Administrative & support | 1988 |
| Fowey House Management Limited | Real estate | 1985 |
| FOX Tale Tuition Ltd | Education | 2020 |
| FR Tonelli Ltd | Wholesale & retail | 2023 |
| Fraigneux Holdings Limited | Professional & scientific | 2021 |
| Fraigneux Limited | Public administration | 2009 |
| Frame Ventures Limited | Other services | 2016 |
| Frameless Glass Doors Ltd | Manufacturing | 2010 |
| Francejiro Foods Limited | Hospitality | 2019 |
| Francis Iles Artycat Limited | Wholesale & retail | 2001 |
| Francombs Rochester Limited | Wholesale & retail | 2021 |
| Free .That . Mind Ltd | Arts & recreation | 2024 |
| Free Spirit Hair Salon Ltd | Other services | 2018 |
| Freedom Assets Ltd | Real estate | 2019 |
| Freedom Fire Limited | Construction | 2006 |
| Freesole Limited | Manufacturing | 2025 |
| Freetime Designs Ltd | Manufacturing | 2018 |
| Freya Scaffolding Ltd | Construction | 2025 |
| Friend & Grant Limited | Professional & scientific | 2001 |
| Friends Cafe Strood Ltd | Hospitality | 2020 |
| Frindsbury Lawn Tennis Club Ltd | Arts & recreation | 2020 |
| Frindsbury Vehicle Services Limited | Wholesale & retail | 2024 |
| Frisco Properties Ltd | Construction | 2023 |
| From Care to Courage Ltd | Education | 2026 |
| Frontier Consultancy Limited | Professional & scientific | 2025 |
| Frop Ltd | Real estate | 2026 |
| Fruitful Pursuits Ltd | Real estate | 2024 |
| Fruitful Vine Outreach Ltd | Health & social care | 2020 |
| FRY Investments (Chine Walk) Limited | Construction | 2025 |
| FRY Investments (Kingsfold) Limited | Construction | 2025 |
| FRY Investments (Tolpuddle) Limited | Construction | 2025 |
| FRY Investments Limited | Hospitality | 2022 |
| Fryer,Stapleton & Company Limited | Construction | 1965 |
| FT Bamgbala Ltd | Health & social care | 2021 |
| FTC Inc Ltd | Construction | 2017 |
| FTK Properties Ltd | Real estate | 2026 |
| FU Xiang 8 Limited | Real estate | 2025 |
| Fudgefantastique Ltd | Hospitality | 2020 |
| Fudgy Busters Ltd | Water & waste | 2024 |
| Fuju Limited | Professional & scientific | 2002 |
| Fulham Advice Limited | Professional & scientific | 2024 |
| Full Spectrum Solutions Limited | Administrative & support | 2012 |
| Fuller Air Services Limited | Energy | 2020 |
| Funloh's Advocacy Ltd. | Health & social care | 2020 |
| Funny Women C.I.C. | Arts & recreation | 2002 |
| Funton Estate Limited | Real estate | 2010 |