| Faith in Fitness Ltd | Glasgow | 2025 |
| Faith in Fitness PT Ltd | Staines-Upon-Thames | 2025 |
| Faith in Strangers Ltd | Margate | 2018 |
| Faith Sports Group Limited | London | 2021 |
| Faith Sports Management Ltd | London | 2020 |
| Faixa RUA Limited | London | 2009 |
| Faiz Cultural Foundation, UK | London | 2012 |
| Faized Limited | Atherstone | 2021 |
| Fajr Run Club Ltd | Bradford | 2025 |
| Fake Empires Collective Ltd | Redhill | 2019 |
| Fake Escape Ltd | London | 2021 |
| Fake Festivals Franchising Limited | Doncaster | 2005 |
| Fake Festivals Limited | Doncaster | 2005 |
| Fake Label Limited | London | 2018 |
| Fakemink Ltd | London | 2025 |
| Fakenham Racecourse Limited | Norfolk | 1965 |
| Fakenham Rugby Union Football Club Limited | Dereham | 2012 |
| Fakenham Sports Charity Limited | Fakenham | 1996 |
| Fakenham Town Football Club Limited | King'S Lynn | 2022 |
| Faktory Studios Limited | Chester | 2011 |
| FAL Beer Fest Ltd | Falmouth | 2024 |
| Falchi Interiors Limited | Farnborough | 2006 |
| Falco Film Services Ltd | Borehamwood | 2024 |
| Falco INK Limited | | 1999 |
| Falco Subbuteo Ltd | Leicester | 2015 |
| Falcombe Trading NO. 2 Limited | Gateshead | 2010 |
| Falcon Acrobatics Bedford Limited | Bedford | 2026 |
| Falcon Art CIC | Bolton | 2014 |
| Falcon Boats Limited | Fishguard | 2016 |
| Falcon Bowling and Social Club (Chelmsford) Limited (the) | Chelmsford | 1964 |
| Falcon Corporation EC Limited | Lochgelly | 1995 |
| Falcon Events Limited | Hailsham | 2023 |
| Falcon Fit Gyms Ltd | Glasgow | 2019 |
| Falcon Fitness Frome Limited | Frome | 2007 |
| Falcon Medical Consulting Limited | | 2000 |
| Falcon Racing UK CIC | Carmarthen | 2026 |
| Falcon Recreational Gymnastics Ltd | Bedford | 2019 |
| Falcon Rose Ltd | Darlington | 2023 |
| Falcon S.A. Gymnastics Club Limited | Bedford | 2004 |
| Falcon Security (London) Limited | | 1987 |
| Falcon Spartak School of Gymnastics | Orpington | 1986 |
| Falcon Stuart Limited | Milton Keynes | 1964 |
| Falcon Touring Ltd | Glasgow | 2026 |
| Falcon Trust Gymnastics Club Ltd | Bedford | 2021 |
| Falcon's Gym Ltd | Earlston | 2025 |
| Falconry Scotland Ltd | Hawick | 2019 |
| Falcons AFC Trading Limited | Market Harborough | 2017 |
| Falcons CC Limited | Dagenham | 2024 |
| Falcons Community Sport Centre | Barnstaple | 2011 |
| Falcons Holdings Limited | Market Harborough | 2017 |
| Falconwood Football Club Limited | Welling | 2021 |
| Falisha Entertainment Ltd | London | 2023 |
| Falkeøje Events Limited | Bournemouth | 2025 |
| Falkirk Football and Athletic Club Ltd. (the) | Falkirk | 1905 |
| Falkirk Rugby Football & Sports Club Ltd | Falkirk | 2013 |
| Falkirk School of Gymnastics Trust Limited | Falkirk | 1986 |
| Falkland Cricket Club Limited | Newbury | 2015 |
| Falkland Cricket Club Trading Limited | Newbury | 2016 |
| Falklands WAR Heritage Centre Ltd | Gloucester | 2023 |
| Fall Line Events Limited | Leicester | 2012 |
| Falling Angel Productions Limited | Worthing | 2016 |
| Falling Below Ltd | London | 2025 |
| Falling Leaf Ltd | London | 2019 |
| Falling Leaves Limited | Bolton | 2019 |
| Fallon Sherrock Dart Promotions Limited | Hampton | 2019 |
| Fallon Stocker Ltd | Stanford-Le-Hope | 2025 |
| Fallow Forest Fitness Limited | Cannock | 2026 |
| Falls Bowling Club C.I.C. | | 1926 |
| Falmouth Classics Association Ltd | Falmouth | 2013 |
| Falmouth Marine Solutions Ltd | Falmouth | 2010 |
| Falmouth Powerboat School Ltd | Falmouth | 2011 |
| Falmouth Reggae Festival Ltd | Falmouth | 2024 |
| Falmouth Rugby Football and Athletic Club Limited | Falmouth | 2010 |
| Falmouth Sport and Leisure Limited | Normandy | 2021 |
| Falmouth Town Association Football Club Limited | Falmouth | 1953 |
| Falmouth Training Solutions Ltd | Falmouth | 2009 |
| Falmouth Water Sports Association | Cornwall | 1992 |
| Falmouth Yacht Marina Limited | Southampton | 1992 |
| Faloh Media Entertainment Limited | Southampton | 2025 |
| Falola Fitness Ltd | Ilford | 2025 |
| Falon Cooper Designs Ltd | Leyland | 2021 |
| False Alarms Ltd | London | 2022 |
| False Flag Tattoo Ltd | Southampton | 2018 |
| False Locust Projects C.I.C. | Altrincham | 2025 |
| FAM Talent Ltd | Ryehill | 2021 |
| Famberry Ltd | London | 2015 |
| Fambridge Yacht Haven Limited | Hampshire | 2003 |
| Fame Creative Talent Ltd | London | 2024 |
| Fame Factory Holdings Limited | London | 2021 |
| Fame Fitness Limited | Barnsley | 2019 |
| Fame MMA UK Ltd | Manchester | 2019 |
| Fame Promotions UK Ltd | London | 2018 |
| Fame Star Youth | Hemel Hempstead | 2019 |
| Fame Xtreme Dance & Cheer Ltd | Hamilton | 2021 |
| Familia DE LA Noche Theatre Company Ltd | Porthcawl | 2014 |
| Familiar Faces Limited | Peterborough | 2015 |
| Familiar Shadow Limited | Stratford-Upon-Avon | 2023 |
| Family Activity Centre Limited | Maidstone | 2016 |
| Family Adventures (Leisure) Limited | Weston-Super-Mare | 2020 |
| Family Adventures Group Ltd | Weston-Super-Mare | 2020 |