| Fortunate Door Supervision Ltd | Administrative & support | 2019 |
| Foster Development Ltd | Professional & scientific | 2014 |
| Fosterwade Limited | Professional & scientific | 2013 |
| Foundation for Knowledge Exchange | Professional & scientific | 2012 |
| Founders & Funders Foundation | Professional & scientific | 2023 |
| Fountaire Ltd | Professional & scientific | 2025 |
| Four Byte Limited | Information & communication | 2024 |
| Fourcroft Limited | Information & communication | 2022 |
| Fowler Digital Solutions Ltd | Wholesale & retail | 2022 |
| Fowler Fisheries Ltd | Agriculture & fishing | 2021 |
| Fowler Investment Group Limited | Wholesale & retail | 2022 |
| Fowler Property Company Limited | Real estate | 2022 |
| FOX Accountants Ltd | Professional & scientific | 2023 |
| FOX Collectables Ltd | Wholesale & retail | 2026 |
| FOX Earth Cleaning Solutions Limited | Administrative & support | 2025 |
| FOX Financial & Taxation Services Ltd | Professional & scientific | 2022 |
| Foxbury Estates Limited | Extraterritorial | 2024 |
| Foxbury Land and Planning Consultancy Limited | Professional & scientific | 2019 |
| Foxcombe Lodge Hotel Limited | Hospitality | 1984 |
| Foxley Design Limited | Real estate | 1973 |
| Foxtrot Group Ltd | Professional & scientific | 2016 |
| Foxtrot Zulu Holdings Limited | Information & communication | 2024 |
| FPS Air Compressors Limited | Extraterritorial | 2024 |
| FPS Property Management Limited | Administrative & support | 2014 |
| FRA Construction Limited | Construction | 2018 |
| Fractional Talent Limited | Real estate | 2008 |
| Frameworx Scaffolding Ltd | Construction | 2021 |
| Francis Fraser Limited | Professional & scientific | 2023 |
| Franzen Consulting Limited | Professional & scientific | 2020 |
| Fraser Hill Limited | Professional & scientific | 2017 |
| Freack Holdings Limited | Financial services | 2024 |
| Fred 154 Limited | Extraterritorial | 2011 |
| Freddie Flintoff Enterprises Limited | Arts & recreation | 2001 |
| Fredshed Limited | Professional & scientific | 2000 |
| Freeman and Clarke Group Limited | Information & communication | 2016 |
| Freeman and Clarke Limited | Information & communication | 2012 |
| Freeman Holdings & Investments Ltd | Financial services | 2026 |
| Freetoll Limited | Information & communication | 1993 |
| Fresco Cafe & Restaurant Ltd | Hospitality | 2026 |
| Fresh Boost Consulting Limited | Professional & scientific | 2010 |
| Fresh Connection Limited | Hospitality | 2006 |
| Fresh CUT Video Ltd | Information & communication | 2016 |
| Fresh Networks UK Limited | Information & communication | 2008 |
| Freshnette Ltd | Administrative & support | 2024 |
| Freshsu Ltd | Manufacturing | 2021 |
| Freshwater Habitats Trust | Professional & scientific | 2004 |
| Fricker Ltd | Real estate | 2025 |
| Frideswide Limited | Professional & scientific | 2017 |
| Friends International Limited | Education | 1998 |
| Friends International Ministries | Other services | 2002 |
| Friends of Education Africa | Administrative & support | 2009 |
| Friends of Horspath | Health & social care | 2013 |
| Friends of the Bodleian | Education | 1945 |
| Friends of the Young Musicians' Association | Education | 1995 |
| Frilford Homes Ltd | Real estate | 2005 |
| Froe Studio Ltd | Manufacturing | 2026 |
| Frog Orange Limited | Wholesale & retail | 2014 |
| From Insight Ltd | Information & communication | 2025 |
| Fronsac Group Ltd | Information & communication | 2022 |
| Front Five Estimating Limited | Professional & scientific | 2012 |
| Frontier Distillery Ltd | Manufacturing | 2022 |
| Frontline Maintenance Ltd | Construction | 2020 |
| Frontline Ventures Limited | Professional & scientific | 2025 |
| Frost & Frost Limited | Professional & scientific | 2010 |
| Frost-Tech Limited | Extraterritorial | 2010 |
| FRS Properties Ltd | Real estate | 2021 |
| FS Diagnostics Ltd | Health & social care | 2018 |
| FU MAN LOU Limited | Hospitality | 2023 |
| Fulcycle Ltd | Wholesale & retail | 2019 |
| Funafloat Limited | Administrative & support | 1997 |
| Function Studio LLP | | 2017 |
| Fungi Kitchen Ltd | Hospitality | 2023 |
| Funky Fidgets Limited | Education | 2014 |
| Funny Story Productions Limited | Arts & recreation | 2025 |
| Furness Films Ltd. | Information & communication | 2017 |
| Fusion Advisory Services Ltd | Professional & scientific | 2023 |
| Fusion Brickwork & Development Limited | Construction | 2023 |
| Fusion Dynamics Corporation Ltd | Manufacturing | 2025 |
| Fusion TT Ltd | Hospitality | 2025 |
| Fusion-Oxford's Community Arts Agency Limited | Arts & recreation | 1987 |
| Futebol DE Salao UK Limited | Arts & recreation | 1997 |
| Futura Property Investment Ltd | Real estate | 2017 |
| Future Build Innovations Ltd | Construction | 2024 |
| Future Developments Oxford Limited | Construction | 2016 |
| Future Gate Limited | Education | 2019 |
| Future Learn School Limited | Education | 2020 |
| Future Property Group Ltd | Real estate | 2024 |
| Future Revolution Ltd | Information & communication | 2021 |
| Futurecurve Limited | Professional & scientific | 2003 |
| Futurewave Insights Ltd | Professional & scientific | 2025 |
| Fuze FIN Limited | Administrative & support | 2019 |
| Fuzion Group Ltd | Real estate | 2018 |
| FW5 Holdings Ltd | Financial services | 2026 |
| Fyfield Lodge Management Company Limited | Households | 1995 |
| Fëanor Technologies Ltd | Information & communication | 2025 |
| G & D'S Limited | Manufacturing | 1992 |
| G a K Limited | Construction | 2006 |
| G C Construction and Civils Limited | Construction | 2020 |
| G C Homes Oxford Limited | Real estate | 2020 |
| G C Interiors Construction Limited | Other services | 2013 |