| Fair Nation Limited | Wholesale & retail | 2020 |
| Fair Talk Mediation Limited | Professional & scientific | 2023 |
| Fairfax & Sparrow Ltd | Professional & scientific | 2015 |
| Fairfax Residential Lettings Limited | Real estate | 2003 |
| Fairfield Residential Home | Health & social care | 2005 |
| Fairfields (Haddenham) Management Company Ltd | Households | 2018 |
| Fairheart Ltd | Education | 2020 |
| Fairlight Books Limited | Information & communication | 2016 |
| Fairspearian Limited | Information & communication | 2007 |
| Falafel Home Ltd | Hospitality | 2024 |
| Falcon Property Plus Ltd | Real estate | 2016 |
| Falcon Studios Ltd | Information & communication | 2025 |
| Falconer Software Solutions Ltd | Information & communication | 2019 |
| Falgo Limited | Professional & scientific | 2007 |
| Fallen Holdings Limited | Financial services | 2024 |
| Family Arena Community Link Organisation | Education | 2010 |
| Family First Solicitors Limited | Professional & scientific | 2013 |
| Family Mediation and Mentoring LLP | | 2021 |
| Family Reset CIC | Education | 2026 |
| Famma Enterprises Limited | Wholesale & retail | 2024 |
| Fane Road Management Company Limited | Households | 2007 |
| Faqir Piri Piri Ltd | Hospitality | 2024 |
| Fara London Ltd | Wholesale & retail | 2021 |
| Faraday Studios Limited | Information & communication | 2023 |
| Farahani Healthcare Ltd | Wholesale & retail | 2024 |
| Faraway Medicine Limited | Health & social care | 2013 |
| Faraz @ Co Ltd | Wholesale & retail | 2025 |
| Farhan Janjua Ltd | Health & social care | 2013 |
| Farm Energy and Control Services Limited | Manufacturing | 1980 |
| Farmington Trust Limited(The) | Other services | 1964 |
| Farmoor Investments Ltd | Real estate | 2019 |
| Fasanmade Estates Limited | Households | 2021 |
| Fashion Eleven 11 Limited | Other services | 2017 |
| Fast Movers Group Ltd | Real estate | 2022 |
| Fast Property Limited | Other services | 2020 |
| Fast Solutions Recruitment Limited | Administrative & support | 2020 |
| Faster Brands Ltd | Professional & scientific | 2018 |
| Fastinslow Ltd | Information & communication | 2024 |
| Fatherli Ltd | Health & social care | 2022 |
| Fatimah & Minahil Ltd | Hospitality | 2020 |
| Fatz Kitchen Ltd | Hospitality | 2024 |
| Faulkner & SON Limited | Households | 1963 |
| Fawkes Construction Ltd | Construction | 2012 |
| FC Heating and Plumbing Ltd | Construction | 2023 |
| FCI Trading Limited | Information & communication | 1997 |
| Fedele Oxford Limited | Wholesale & retail | 2018 |
| Fedo Global Ltd | Health & social care | 2022 |
| Feedyourmicrobiome Ltd | Wholesale & retail | 2024 |
| Feel Fit Gym Ltd | Education | 2008 |
| Feelix Ltd | Transport & logistics | 2022 |
| FEI Meng Limited | Professional & scientific | 2023 |
| Feinger Builders Sevices Limited | Construction | 2025 |
| Felicity Bryan Associates Limited | Administrative & support | 1999 |
| Felicity Kumari Ltd | Wholesale & retail | 2018 |
| Fely Dofta Care UK Ltd | Health & social care | 2022 |
| Femme First Consulting Ltd | Professional & scientific | 2025 |
| Fenix Lettings Oxford Ltd | Hospitality | 2024 |
| Fennell Construction Ltd | Construction | 2025 |
| Fermentation Technologies Ltd | Professional & scientific | 2022 |
| Fernando Locksmith Limited | Administrative & support | 2025 |
| Feroz Properties Limited | Real estate | 2024 |
| Fewcott Properties Limited | Real estate | 2005 |
| Fianna Consulting Ltd | Professional & scientific | 2026 |
| Fidem Capital Partners UK Limited | Professional & scientific | 2018 |
| Fielders ROW (Oxford) Management Company Limited | Households | 2017 |
| Fieldside Farm Ltd | Real estate | 2020 |
| Fiesta Property Ltd | Real estate | 2020 |
| Fifield Properties Limited | | 1987 |
| Fileverse Limited | Professional & scientific | 2022 |
| Filipino Community of Oxfordshire Community Interest Company | Arts & recreation | 2021 |
| Filipino Nurses Association UK Community Interest Company | Health & social care | 2020 |
| Film IT International Ltd | Information & communication | 2021 |
| Film Oxford Productions Limited | Information & communication | 2022 |
| Film Shed Media Limited | Information & communication | 2016 |
| Filter Designs Ltd | Manufacturing | 2001 |
| Finance & Management Resources Limited | Professional & scientific | 2004 |
| Finance First Bookkeeping Ltd | Professional & scientific | 2023 |
| Financial Fitness Advisors Ltd | Professional & scientific | 2023 |
| Financial Services and Business Consulting Ltd | Professional & scientific | 2009 |
| Financial Therapy Limited | Financial services | 2025 |
| Find ISO Consultants Ltd | Extraterritorial | 2021 |
| Finden Ltd | Professional & scientific | 2012 |
| Finder Motors Ltd | Wholesale & retail | 2025 |
| Finderproduct Ltd | Wholesale & retail | 2026 |
| Fine Infotech Limited | Wholesale & retail | 2018 |
| Fine Interiors International Ltd | Wholesale & retail | 2025 |
| Fine Wine Management Limited | Professional & scientific | 1998 |
| Fine Wine Trading Limited | Wholesale & retail | 1999 |
| Finedelta Limited | | 1984 |
| Finesse Aviation Detailing Ltd | Transport & logistics | 2019 |
| Finest Hour Warbirds Limited | Transport & logistics | 2014 |
| Finest Property Ltd | Real estate | 2024 |
| Finest Transport Limited | Transport & logistics | 2025 |
| Finn & Jesse Ltd | Information & communication | 2026 |
| Finney Management Limited | Professional & scientific | 2011 |
| Finros Search Ltd | Information & communication | 2026 |
| Fins & Paws Limited | Professional & scientific | 2021 |
| Fintuitive Group Ltd | Financial services | 2020 |
| Fintuitive Ltd | Information & communication | 2018 |
| Fintuitive Treasury Professional Limited | Financial services | 2019 |