| Farleigh School Trust Limited | Education | 1967 |
| Farm Waste Solutions Limited | Water & waste | 2024 |
| Farrtech Ltd | Professional & scientific | 2025 |
| Fast & Reliable Services Limited | Wholesale & retail | 2017 |
| Fast Build Supplies Limited | Construction | 2014 |
| Father & Daughter Transport Limited | Transport & logistics | 2013 |
| Fazed Pictures Ltd | Information & communication | 2014 |
| FBA Consult Limited | Professional & scientific | 2026 |
| FCO Investments Ltd. | Financial services | 2021 |
| Felcoe Property Ltd | Real estate | 2025 |
| Femkks Ltd | Hospitality | 2025 |
| Fenestration Maintenance Ltd | Extraterritorial | 2024 |
| Ferati Valet Ltd | Other services | 2026 |
| Fetch the Soap Ltd | Other services | 2023 |
| Fevo Consultancy Limited | Arts & recreation | 2020 |
| Fevo Limited | Arts & recreation | 2020 |
| Fface Solutions Ltd | Construction | 2014 |
| FFB Limited | Transport & logistics | 2016 |
| Fibregence Ltd | Extraterritorial | 2022 |
| Field and Folk Creative Ltd | Professional & scientific | 2025 |
| Fieldcroft Land Ltd | Real estate | 2021 |
| Fifehead Manor Limited | Households | 2008 |
| Fighting Falcons Ltd | Arts & recreation | 2017 |
| Figure’Z Ltd | Professional & scientific | 2020 |
| Fikka Commerce Ltd | Wholesale & retail | 2020 |
| Filmekanik Ltd | Information & communication | 2012 |
| Financial Alchemy Limited | Professional & scientific | 2007 |
| Finca Management Limited | Real estate | 2013 |
| Finding Fulfilment Youth Services Ltd | Health & social care | 2026 |
| Findlay Rose Ltd | Professional & scientific | 2016 |
| Finkley Down Farm Ltd | Hospitality | 2013 |
| Fire Guard Solutions Ltd | Construction | 2017 |
| First Fast Solution Ltd | Transport & logistics | 2018 |
| First FIX Construction Limited | Construction | 2021 |
| FIRST4BUSINESSES Limited | Wholesale & retail | 2003 |
| Fish and Chips (Andover) Limited | Hospitality | 2022 |
| Fitzmaurice Mccall Limited | Professional & scientific | 1979 |
| Five White Mice Consultancy Ltd | Professional & scientific | 2023 |
| Fiverivers Civil Engineering (5R) Limited | Other services | 2025 |
| Fiverivers Consultancy (5R) Limited | Extraterritorial | 2025 |
| Fiverivers Group (5R) Limited | Extraterritorial | 2025 |
| Fiverivers Partnership LLP | | 2022 |
| Fivespillars Limited | Hospitality | 2025 |
| Flamed Earth Ceramics LLP | | 2021 |
| Flamelily Care Services Ltd | Health & social care | 2025 |
| Flamelily Independent Living Ltd | Health & social care | 2017 |
| Fleximed Ltd | Administrative & support | 2018 |
| Flexinet Ltd | Information & communication | 2021 |
| Flora Estates Limited | Construction | 2024 |
| Florilega Limited | Agriculture & fishing | 2022 |
| Flourish Business Services Limited | Professional & scientific | 2025 |
| Flow Management Solutions Ltd | Water & waste | 2023 |
| Flow Mens Grooming Ltd | Other services | 2024 |
| Flowcentric Technologies Limited | Information & communication | 2017 |
| Flowerdew Management Limited | Households | 2025 |
| Flyby Coffee Ltd | Hospitality | 2024 |
| Folud Ltd | Real estate | 2026 |
| Fone Care Wells Limited | Wholesale & retail | 2023 |
| Forest Call Handling Ltd | Administrative & support | 2018 |
| Forest View Asset Management Ltd | Financial services | 2020 |
| Forest View Capital Investments Limited | Financial services | 2024 |
| Forest View Capital Limited | Financial services | 2024 |
| Forest View Wealth Management Limited | Financial services | 2024 |
| Forghetti Limited | Information & communication | 2017 |
| Forseti Projects Ltd | Professional & scientific | 2018 |
| Fortiestestveritasmedia Limited | Manufacturing | 2025 |
| Fortress Consultancy Ltd | Professional & scientific | 2026 |
| Fortuna Flora Ltd | Health & social care | 2025 |
| Forty Four Junction Road Limited | Other services | 1985 |
| Forwex Limited | Wholesale & retail | 2023 |
| Foster & Forge Ltd | Education | 2014 |
| Foster Bowes Limited | Manufacturing | 2019 |
| Foster Growth Consultancy Ltd | Professional & scientific | 2025 |
| Foundry Farm Ltd | Administrative & support | 2016 |
| Founds (U.K.) Limited | Construction | 1993 |
| Four Pillars Ltd | Real estate | 2023 |
| Fouracre Systems Ltd | Administrative & support | 2010 |
| FOX Farm Management Ltd. | Real estate | 2001 |
| FOX Red Safety Ltd | Professional & scientific | 2025 |
| Foxcotte Ltd | Professional & scientific | 2024 |
| Foxcotte Property and Plumbing Ltd | Construction | 2019 |
| Foxdown Overton Management Limited | Households | 2008 |
| Foxtangley Ltd | Hospitality | 2013 |
| Foxx Consulting Ltd | Professional & scientific | 2024 |
| Framing Success Limited | Other services | 1989 |
| Francesca Jane Designs Ltd | Professional & scientific | 2024 |
| Freedom Bi-Folds Limited | Wholesale & retail | 2015 |
| Front ROW Construction Limited | Construction | 2020 |
| Frontrow Property Rentals Ltd | Real estate | 2019 |
| Frost Procurement Adventurer Ltd | Professional & scientific | 2016 |
| FSS Motorsport Ltd | Wholesale & retail | 2021 |
| FTL Compliance Ltd | Transport & logistics | 2020 |
| Fuges Group Limited | Hospitality | 2019 |
| Fulfil Limited | Manufacturing | 2011 |
| Fulfil UK LLP | | 2011 |
| Fullerton Farms Holdings Limited | Financial services | 2025 |
| Fullerton Farms Limited | Agriculture & fishing | 1969 |
| Fulton Management Limited | Administrative & support | 2011 |
| Funshoj Healthcare Ltd | Health & social care | 2023 |
| Furlong Business Solutions Limited | Information & communication | 2003 |