| Folkeast Limited | Halesworth | 2011 |
| Folkeast Productions Limited | Halesworth | 2012 |
| Folkestone & Hythe Golf Club Limited | Folkestone | 1954 |
| Folkestone & Hythe Orchestral Productions Limited | Densole | 2018 |
| Folkestone Athletic FC CIC | Folkestone | 2026 |
| Folkestone Bowls Association Limited | Folkestone | 1965 |
| Folkestone Comedy Ltd | Folkestone | 2022 |
| Folkestone Invicta F.C. Limited | Folkestone | 2001 |
| Folkestone Jiujitsu Team Ltd | Folkestone | 2023 |
| Folkestone Live CIC | Folkestone | 2025 |
| Folkestone Race Course Limited | London | 1899 |
| Folkestone Rescue Ltd | Folkestone | 2015 |
| Folkestone Rugby Club Limited | Folkestone | 2011 |
| Folkestone Sculling Academy Limited | Hythe | 2025 |
| Folkestone Sports Centre Trust Limited | Milton Keynes | 1973 |
| Folkfit Ltd | King'S Lynn | 2020 |
| Folkingham Creative Arts Ltd | Sleaford | 2022 |
| Folklore Ensemble Bulgaria - London CIC | Reading | 2024 |
| Folklore Sessions Ltd | Hove | 2021 |
| Folklore Venues Ltd | Hove | 2025 |
| Folksy Theatre Limited | Glasgow | 2012 |
| Follies in Concert (London) Ltd | London | 2014 |
| Follifoot Cricket Club Trustees Limited | Leeds | 2003 |
| Follow for Money Limited | London | 2025 |
| Follow the Nightjar Ltd | 3 Dorset Rise | 2026 |
| Follow Your Art With Pauline CIC | London | 2024 |
| Follow Your Dreamz Performing Arts CIC | Emsworth | 2019 |
| Follow Your Heart Productions Ltd | Folkestone | 2025 |
| Follyvision Limited | Borehamwood | 2016 |
| FOM Ltd | St. Albans | 2025 |
| Fomo ADS Ltd | London | 2025 |
| Fomocompetitions Ltd | Manchester | 2025 |
| Fondazione Giovani Valori | London | 2020 |
| Fondazione Memoria Predappio Ltd | London | 2022 |
| Fones Down Ltd | Newcastle Upon Tyne | 2025 |
| Fonfe Talent Ltd | Windsor | 2023 |
| Fonmon Castle Limited | Alcester | 2018 |
| Fonofire Media Limited | Wallington | 2021 |
| Fonseca Wellbeing Ltd | Basingstoke | 2022 |
| Font Creative Ltd | Chelmsford | 2017 |
| Fontaine Boxing and Fitness Ltd | London | 2020 |
| Fontalba Limited | London | 2004 |
| Fontown Limited | London | 2014 |
| Fontwell Park Steeplechase Limited (the) | London | 1923 |
| Fontygary Parks Limited | South Glamorgan | 1960 |
| Fonz and the Poet Limited | Neath | 2017 |
| Fonzarelli Limited | London | 2015 |
| Food and Funk Tour Ltd | London | 2019 |
| Food Festivals Ltd | Cheltenham | 2013 |
| Food of WAR Ltd | London | 2022 |
| Food Routes Ltd | Leicester | 2021 |
| Fool in the Forest Limited | London | 2019 |
| Fool Moon Ltd | London | 2025 |
| Fool's Gold Tattoo Ltd | Liverpool | 2019 |
| Foolanas Limited | Twickenham | 2019 |
| Fooley and Fooley Ltd | London | 2017 |
| Foolish Productions Ltd | London | 2023 |
| Fools on Horses Limited | Newport Pagnell | 2009 |
| Fools Paradise Limited | Exeter | 1999 |
| Foord & Co UK Ltd | Southampton | 2009 |
| Foosball Academy Ltd | Exmouth | 2014 |
| Foot Down Records Ltd | Leominster | 2024 |
| Foot Forward Community Limited | London | 2025 |
| Foot Golf Wise Limited | Chelmsford | 2015 |
| Foot Soldiers Music Limited | Baildon | 2018 |
| Foot Stompin' Ceilidh Band Limited | Glasgow | 2019 |
| Foot Tappers Limited | Woldingham | 2018 |
| Foot-Tech Academy Ltd | Leeds | 2015 |
| Football 24-7 Limited | Preston | 2013 |
| Football 4 Football Limited | Manchester | 2009 |
| Football 567 Ltd | Wallington | 2011 |
| Football Academy Bournemouth Ltd | Bournemouth | 2025 |
| Football Academy Europe Limited | Northwich | 2014 |
| Football Action Network CIC | Reading | 2026 |
| Football African Statistics Ltd | London | 2023 |
| Football Agent UK Ltd | Bury | 2023 |
| Football and Fitness Clubs Limited | Leicester | 2014 |
| Football and Fitness Futures Limited | Leicester | 2018 |
| Football Association Limited | London | 1903 |
| Football Association of Tamil Eelam Limited | London | 2017 |
| Football Association of Wales Limited | Hensol | 1926 |
| Football Black Book Holdings Ltd | London | 2025 |
| Football Buzz Ltd | Livingston | 2011 |
| Football Buzz Partnership Limited | West Calder | 2021 |
| Football Buzz West Ltd | Johnstone | 2024 |
| Football Capital Limited | London | 2014 |
| Football Careers Centre Limited | Colchester | 2003 |
| Football Champion Limited | London | 2021 |
| Football Club Hertz Limited | Cranbrook | 2025 |
| Football Club Iannis CIC | Leicester | 2023 |
| Football Coaching & Development Ltd | Manchester | 2025 |
| Football Connect Ltd | Croydon | 2022 |
| Football Cricket Specialists Ltd | Loughborough | 2013 |
| Football Development East Limited | London | 2022 |
| Football Domination Ltd | London | 2013 |
| Football Education Development Opportunity Limited | Maidenhead | 2014 |
| Football Escapes Limited | Richmond | 2016 |
| Football Family Limited | Wilmslow | 2018 |
| Football Fiesta Limited | Tiverton | 2018 |
| Football First 2002 Limited | Bridgnorth | 2009 |