| Fionaomolayo.B Limited | Wholesale & retail | 2023 |
| FIR Tree Theatre C.I.C. | Arts & recreation | 2024 |
| Fire and Security Shop Limited | Administrative & support | 2008 |
| Fire WOK Wantage Ltd | Hospitality | 2026 |
| Firefly Film Productions Ltd | Information & communication | 2019 |
| Firefly Technology Limited | Information & communication | 2000 |
| Firestarter Publishing Limited | Information & communication | 2026 |
| Firmvalue Payrolls Limited | Professional & scientific | 1997 |
| Firomy Limited | Arts & recreation | 2018 |
| First Call HR Solutions (South) Limited | Administrative & support | 2010 |
| First Class Insurance Consultants Ltd. | Financial services | 1997 |
| First Class Products (Oxford) Limited | Wholesale & retail | 2008 |
| First Collect International Ltd. | Administrative & support | 1993 |
| First Construction Equipment Limited | Wholesale & retail | 2017 |
| First Down Academy C.I.C. | Education | 2026 |
| First Touch Games Limited | Information & communication | 2011 |
| First.Power.Ja Ltd | Water & waste | 2024 |
| Fisher Studios Limited | Professional & scientific | 2004 |
| Fisherman Steps Advisory Limited | Professional & scientific | 2024 |
| Fisherman Steps Investments Limited | Financial services | 2026 |
| Fishlasers Ltd | Information & communication | 2022 |
| Fit Union Ltd | Arts & recreation | 2020 |
| Fitright Oxford Ltd | Wholesale & retail | 2023 |
| Fits Capital Ltd | Information & communication | 2024 |
| Fitzgeraldpubgroup Ltd | Hospitality | 2026 |
| Five Eight Five Espresso Limited | Hospitality | 2016 |
| Fixndeliver Ltd | Other services | 2025 |
| Fizog Design Limited | Professional & scientific | 2005 |
| FJH Retail Consultancy Limited | Professional & scientific | 2012 |
| FJM Consulting Services Limited | Professional & scientific | 2022 |
| Flagbear Media Ltd | Professional & scientific | 2021 |
| Flat Earth the Musical Ltd | Arts & recreation | 2026 |
| Flatford Place Management Company Limited | Households | 2013 |
| Flavors Pizza and Grill Ltd | Hospitality | 2026 |
| Fldk UK Ltd | Manufacturing | 2024 |
| Fletcher Networks Limited | Information & communication | 2015 |
| Fletcher Services Oxford Ltd | Construction | 2021 |
| Flight Communications Ltd | Professional & scientific | 2021 |
| Flint & Lambourn Marquees Limited | Administrative & support | 2007 |
| Flipkeys & Co. Ltd | Real estate | 2025 |
| Flipping Burgerz Ltd | Hospitality | 2020 |
| Flo's Trading Ltd | Wholesale & retail | 2021 |
| Flono PUB Co Ltd | Hospitality | 2023 |
| Flora Earth Ltd | Professional & scientific | 2012 |
| Flora Lenon Studios Ltd | Professional & scientific | 2026 |
| Florence Park Flats Ltd | Administrative & support | 2016 |
| Florence Park Social Club and Bar Ltd | Hospitality | 2025 |
| Florimel Court (Gedling) Management Company Limited | Real estate | 2005 |
| Flory Bookkeeping Limited | Professional & scientific | 2011 |
| Flourish Development Consulting Ltd | Professional & scientific | 2018 |
| Flow Carpentry Ltd | Manufacturing | 2022 |
| Flow Soundsystem Ltd | Arts & recreation | 2024 |
| Fltrp (UK) Limited | Information & communication | 2014 |
| Fluorok Limited | Manufacturing | 2022 |
| Flutter House Ltd | Information & communication | 2025 |
| Flynn Car Body Repairs Limited | Wholesale & retail | 2022 |
| FNA UK (Compressors) Limited | Administrative & support | 2011 |
| Focus Electrical (Oxford) Ltd | Construction | 2012 |
| Focus Micro Systems Limited | Professional & scientific | 1990 |
| Foilage Property Limited | Real estate | 2012 |
| Folly Bridge Brasserie Limited | Hospitality | 2012 |
| Folly Bridge Court Freehold Limited | Households | 1996 |
| Folly Bridge Court Management Limited | Households | 1983 |
| FON FIX 4 U Oxford Limited | Wholesale & retail | 2014 |
| Fong & TSE Ltd | Real estate | 2020 |
| Food of Nepal Ltd | Hospitality | 2021 |
| Food Square Ltd | Hospitality | 2024 |
| Foodplate Limited | Hospitality | 2021 |
| Foot Life Limited | Health & social care | 2026 |
| Football Coaching Academy Ltd | Administrative & support | 2021 |
| Footloose and Fancy Free Limited | Extraterritorial | 1991 |
| Footsteps Foundation | Health & social care | 2007 |
| Footsteps Ltd | Administrative & support | 2004 |
| Footwork First Limited | Administrative & support | 2007 |
| Foranimall Ltd | Manufacturing | 2020 |
| Forbes & Mccartney Foods Limited | Hospitality | 2006 |
| Fordington Manor Developments Limited | Real estate | 1997 |
| Fordington Manor Estates Limited | Real estate | 1996 |
| Foreign Affairs Consultancy Ltd | Information & communication | 2025 |
| Foresight Oxford Education Ltd | Education | 2005 |
| Forest Beach Group Limited | Financial services | 2026 |
| Forest Beach Ltd | Wholesale & retail | 2025 |
| Forest Beach Management Ltd | Professional & scientific | 2026 |
| Forester Maclean Limited | Financial services | 1971 |
| Forethought Research | Professional & scientific | 2024 |
| Forever Deals Ltd | Wholesale & retail | 2024 |
| Forge App Limited | Information & communication | 2025 |
| Forkpalm Limited | Extraterritorial | 1980 |
| Formal Systems (Europe) Limited | Information & communication | 1989 |
| Formosan UK Limited | Hospitality | 2012 |
| Fornax International Limited | Other services | 2018 |
| Forstone Edistribution Ltd | Wholesale & retail | 2022 |
| Fort Corps Limited | Administrative & support | 2021 |
| Forte Books Ltd | Information & communication | 2021 |
| Fortis Property Consultants Limited | Construction | 2019 |
| Fortitude Communications Limited | Other services | 2017 |
| Fortrams Develop Limited | Construction | 2015 |
| Fortrams Estate Ltd | Construction | 2017 |
| Fortrams Reflect Ltd | Professional & scientific | 2014 |
| Fortress Sports Solutions Ltd | Arts & recreation | 2015 |