| F.& B.Ingram Limited | Real estate | 1959 |
| F.& J.Black Limited | | 1939 |
| F.A Renovations Ltd | Real estate | 2025 |
| F.C Motors Ltd | Wholesale & retail | 2016 |
| F.C.Richardson & SON Limited | Construction | 1957 |
| F.C.S. European Limited | Real estate | 2002 |
| F.C.S. Properties Limited | Real estate | 1991 |
| F.D.E Construction Kitchens & Doors Ltd | Construction | 2018 |
| F.Gayle Ltd | Information & communication | 2015 |
| F.I Letting Ltd | Real estate | 2025 |
| F.J Desai Limited | Health & social care | 2013 |
| F.M Automotive Limited | Manufacturing | 2016 |
| F.M Optometry Limited | Health & social care | 2025 |
| F.M.Q Automotive Ltd | Wholesale & retail | 2023 |
| F.Moradian Transportation Services 2109 Limited | Transport & logistics | 2025 |
| F.Net Delivery Ltd | Wholesale & retail | 2022 |
| F.O.D International Ltd | Financial services | 2022 |
| F.S. Transport Ltd | Transport & logistics | 2025 |
| F.S.N.A Ltd | Wholesale & retail | 2026 |
| F1 Alloys Ltd | Wholesale & retail | 2026 |
| F1 Hydraulics Limited | Transport & logistics | 1974 |
| F1 Interiors Ltd | Professional & scientific | 2018 |
| F1 Trading Ltd | Wholesale & retail | 2024 |
| F10 Services Limited | Professional & scientific | 2018 |
| F1RSTCHOICE Limited | Financial services | 2017 |
| F4 Property Limited | Real estate | 2018 |
| F4A Construction Limited | Construction | 2024 |
| F4P Ltd | Wholesale & retail | 2019 |
| F5 Foster Care Limited | Hospitality | 2016 |
| F8 Private Members Club Ltd | Other services | 2025 |
| F9 Media Ltd | Professional & scientific | 2022 |
| FA Aspires Ltd | Transport & logistics | 2025 |
| FA Cleaning Service Ltd | Administrative & support | 2024 |
| FA Housing Ltd | Hospitality | 2022 |
| FA Management Consultancy Ltd | Professional & scientific | 2026 |
| FA Smile Holdings Ltd | Other services | 2023 |
| FA Smile Trading Ltd | Other services | 2026 |
| FA2 Developments Ltd | Construction | 2019 |
| Faaas Invesments Ltd | Real estate | 2023 |
| Faam Traders Ltd | Wholesale & retail | 2021 |
| Faas Global Limited | Transport & logistics | 2026 |
| FAB 4X4 Service Centre Limited | Wholesale & retail | 2019 |
| FAB Beauty Empire Ltd | Other services | 2026 |
| FAB Coffee Co. Ltd | Wholesale & retail | 2018 |
| FAB Crocus Limited | Real estate | 2020 |
| FAB Equip Ltd | Wholesale & retail | 2018 |
| FAB Estate Investments Limited | Real estate | 2024 |
| FAB Express Ltd | Wholesale & retail | 2025 |
| FAB Garage&Breakers Ltd | Wholesale & retail | 2025 |
| FAB Homes &Maintenance Limited | Construction | 2026 |
| FAB Hospitality Limited | Wholesale & retail | 2020 |
| FAB Living Ltd | Hospitality | 2025 |
| FAB Travel N Parcel Services Limited | Transport & logistics | 2014 |
| FAB Vehicle Solutions Limited | Wholesale & retail | 2026 |
| FAB4 FM Ltd | Administrative & support | 2025 |
| Fabasif Ltd | Real estate | 2024 |
| Faber Consulting Limited | Professional & scientific | 2012 |
| Fabian J Folkes Ltd | Manufacturing | 2017 |
| Fabiha Fashion Ltd | Manufacturing | 2023 |
| Fabio Luciano Ltd | Construction | 2025 |
| Fablink (Evenwood) Limited | Manufacturing | 2024 |
| Fablink (Luton) Limited | Manufacturing | 2024 |
| Fablink (Northampton) Limited | Manufacturing | 2024 |
| Fablink (Wolverhampton) Limited | Manufacturing | 2024 |
| Fablink Group Holdings Limited | Manufacturing | 2017 |
| Fabric Care Ltd | Administrative & support | 2022 |
| Fabric Design & Integration Ltd | Construction | 2014 |
| Fabric Design Group Limited | Professional & scientific | 2013 |
| Fabric Distributors Ltd | Manufacturing | 2025 |
| Fabric Emporia Limited | Wholesale & retail | 2013 |
| Fabric Living Limited | Extraterritorial | 2019 |
| Fabric Maintenance Projects Ltd | Construction | 2024 |
| Fabric of the Community CIC | Education | 2022 |
| Fabric Property Group Limited | Construction | 2023 |
| Fabric Solutions London Ltd | Construction | 2010 |
| Fabrica & Komerco Trading Ltd | Wholesale & retail | 2026 |
| Fabricate X Ltd | Manufacturing | 2024 |
| Fabricshift Limited | Information & communication | 2015 |
| Fabrikado LP | | 2015 |
| Fabrimast Ltd | Wholesale & retail | 2020 |
| Fabryc & Taylor Ltd | Manufacturing | 2022 |
| Fabulash Lash Boudoir Ltd | Other services | 2019 |
| Fabulicious Pamper Parties Limited | Other services | 2025 |
| Fabulous Cleaning Services Ltd | Administrative & support | 2025 |
| Fabulous Eyes & Brows Limited | Other services | 2009 |
| Fabulous Floor Fitters Ltd | Wholesale & retail | 2018 |
| Fabulous Floors Ltd | Wholesale & retail | 2021 |
| Fabulous Health Care Ltd | Health & social care | 2020 |
| Fabulous Home Furnishings Ltd | Wholesale & retail | 2018 |
| Fabulouspropertymaintanance Ltd | Construction | 2026 |
| Fabulouz Desserts Ltd | Hospitality | 2021 |
| Fabulouz Foods Ltd | Hospitality | 2020 |
| Fabvip Limited | Wholesale & retail | 2012 |
| Faby Cleaning Limited | Other services | 2019 |
| Faby Transport Ltd | Transport & logistics | 2015 |
| FAC & OAC Ltd | Health & social care | 2022 |
| FAC Yardley Ltd | Hospitality | 2026 |
| Facade & Drylining Limited | Construction | 2011 |
| Facade & Glazing Solutions UK Limited | Construction | 2018 |
| Facade Engine Limited | Manufacturing | 2021 |