| FK Digital Alliance Limited | Professional & scientific | 2026 |
| FK Housing Ltd | Real estate | 2025 |
| Flags Software Limited | Information & communication | 2019 |
| Flaming Ltd | Information & communication | 2004 |
| Flaming Rain Limited | Information & communication | 2010 |
| Flash Climbing Centre Limited | Arts & recreation | 2018 |
| Flaxley Court Management Limited | Households | 2006 |
| Fledglings Nursery (Solihull) Ltd | Education | 2005 |
| Fleet Electrical Installations Limited | Wholesale & retail | 2025 |
| Fleet Services Network Limited | Wholesale & retail | 2008 |
| Fleet Street Consulting Limited | Professional & scientific | 2009 |
| Fleetly Limited | Information & communication | 2025 |
| Fletcher Property Rentals Limited | Real estate | 2013 |
| Fleur & Dragon Escapes Ltd | Real estate | 2026 |
| Flexi Communication & Electrical Limited | Information & communication | 2010 |
| Flexiglass Limited | Wholesale & retail | 2019 |
| Flight Limited | Extraterritorial | 2025 |
| Flingo Limited | Financial services | 2016 |
| Flinn Ltd | Professional & scientific | 2023 |
| Flinthouse Consulting Limited | Professional & scientific | 2024 |
| Flippin Pizza Co Ltd | Hospitality | 2023 |
| FLIX24 Limited | Wholesale & retail | 2024 |
| Floaim Ltd | Extraterritorial | 2012 |
| Floms Consultancy Limited | Professional & scientific | 2021 |
| Flood Defence Gates Co Limited | Professional & scientific | 2007 |
| Floor Pro Ltd | Construction | 2015 |
| Floor Restorations Limited | Construction | 1982 |
| Floor Restorations UK Limited | Extraterritorial | 2008 |
| Floor Trends Limited | Construction | 2013 |
| Floorskills Limited | Education | 2012 |
| Florence & Picalilo Limited | Wholesale & retail | 2023 |
| Floridian Properties Limited | Real estate | 1969 |
| Flourish Business Development Limited | Professional & scientific | 2010 |
| Flourish Interiors Ltd | Professional & scientific | 2022 |
| Flourishing Futures Care Limited | Health & social care | 2025 |
| Flourishing Futures Holdings Limited | Financial services | 2025 |
| Flowaime Ltd | Other services | 2012 |
| Flowers of Beauty Bentley Heath Limited | Wholesale & retail | 2026 |
| Flowers of Beauty Knowle Limited | Wholesale & retail | 2026 |
| Flowscent Limited | Wholesale & retail | 2014 |
| Flowtec Limited | Construction | 2017 |
| FLR Floors Ltd | Extraterritorial | 2013 |
| FLR Group Ltd | Construction | 2016 |
| FLR Lifestyle Ltd | Other services | 2016 |
| FLR Resin Floors Ltd | Construction | 2016 |
| FLY - First Love Yourself Ltd | Wholesale & retail | 2018 |
| FLY Belt Limited | Wholesale & retail | 2011 |
| Flying Buddha Limited | Extraterritorial | 2023 |
| Flymingo (UK) Limited | Information & communication | 2022 |
| FM (1933) Properties Limited | Real estate | 2018 |
| FND Medical Limited | Health & social care | 2015 |
| Fnsteel Limited | Wholesale & retail | 2011 |
| Focalpoint.Ai Ltd | Professional & scientific | 2025 |
| Focus Green Ltd | Construction | 2021 |
| Focus Referrals Limited | Professional & scientific | 2017 |
| Focus Roofing Services Ltd | Construction | 2023 |
| Fone Dealer Ltd | Wholesale & retail | 2005 |
| Fone Squad (Midlands) Limited | Wholesale & retail | 2022 |
| Fone Squad Limited | Wholesale & retail | 2017 |
| Food Brokerage Ltd | Hospitality | 2017 |
| Food Champs Limited | Hospitality | 2021 |
| Food for Thought Nourishing Bodies Healing Minds C.I.C. | Hospitality | 2024 |
| Food Terminal Ltd | Hospitality | 2026 |
| Foot Matters Ltd | Health & social care | 2010 |
| Footie Fest Limited | Administrative & support | 2026 |
| Fope Jewellery Limited | Wholesale & retail | 2017 |
| Ford Sales Agency Limited | Administrative & support | 2009 |
| Forders Gym Limited | Other services | 2019 |
| Forensic Eyecare Limited | Health & social care | 2005 |
| Forest Grange Management Limited | Real estate | 2008 |
| Forest Veterinary Centre Limited | Professional & scientific | 2013 |
| Forestry Estates Ltd | Real estate | 2024 |
| Forever Glow Limited | Other services | 2023 |
| Forever Living Products (U.K.) Limited | Wholesale & retail | 1988 |
| Forever Property Maintenance Limited | Real estate | 2016 |
| Forge House Estates Holdings Ltd | Real estate | 2015 |
| Forge House Estates Ltd | Real estate | 2015 |
| Forge Strategy Group Ltd | Professional & scientific | 2026 |
| Forgedpoint Ltd | Construction | 2024 |
| Forgen Renewables Ltd | Professional & scientific | 2010 |
| Fork & Knife Foods Limited | Hospitality | 2018 |
| Fork Lift Recruitment & Training Limited | Administrative & support | 2006 |
| Forksnfolks Limited | Hospitality | 2026 |
| Form Genie AI Limited | Information & communication | 2025 |
| Form Social Limited | Information & communication | 2020 |
| Formtecnic Limited | Manufacturing | 2025 |
| Formula for Coffee Ltd | Hospitality | 2024 |
| Forrester Street Limited | Real estate | 2005 |
| Forshaw Heath Investments Limited | Real estate | 2012 |
| Forshaw Investments (Coventry) Limited | Real estate | 2015 |
| Fort & Wolfe Limited | Real estate | 2016 |
| Fortis Merchants Limited | Administrative & support | 2013 |
| Fortis Property Management Ltd | Administrative & support | 2013 |
| Fortium Holdings Ltd | Financial services | 2025 |
| Fortnite Investments Limited | Real estate | 2020 |
| Fortress Boxing Limited | Wholesale & retail | 2021 |
| Forttas Ltd | Professional & scientific | 2014 |
| Fortune House (Solihull) Ltd | Hospitality | 2024 |
| Fortune Vistas Limited | Real estate | 2021 |
| Forward Construction & Carpentry Ltd | Construction | 2026 |