| Faithful FR129 Fishing Ltd | Fraserburgh | 2018 |
| Faiva Property Services Ltd | St. Helens | 2024 |
| Fakro Holdings Limited | Swadlincote | 2000 |
| Fakro Roof Windows Limited | Swadlincote | 2012 |
| FAL Estuary Investments Limited | London | 2020 |
| FAL Foundation | Cambridge | 2020 |
| Falah Enterprise Limited | London | 2011 |
| Falah Limited | Riversway | 1997 |
| Falana Group Ltd | St Helens | 2022 |
| Falcarragh Ltd | Omagh | 2024 |
| Falco Boats Limited | Exeter | 2012 |
| Falcombe Nominees Limited | London | 2009 |
| Falcombe Trading Limited | Gateshead | 2010 |
| Falcombe Trading NO. 1 Limited | Gateshead | 2010 |
| Falcon Catering Equipment Limited | King'S Lynn | 1952 |
| Falcon Crest Investments Ltd | Manchester | 2025 |
| Falcon Financial Ltd | Salford | 2015 |
| Falcon Flight Training Academy Limited | Westerham | 2009 |
| Falcon Flying Group Limited | Westerham | 2008 |
| Falcon Flying School Limited | Westerham | 2012 |
| Falcon for General Trading Limited | Manchester | 2026 |
| Falcon for Trading & Services Limited | Manchester | 2026 |
| Falcon for Trading Limited | Manchester | 2026 |
| Falcon General Trading Limited | Manchester | 2026 |
| Falcon Inter Teck Limited | Usk | 1983 |
| Falcon Investments (LKP) Limited | Bristol | 2007 |
| Falcon Leisure (Morecambe) Limited | Lancaster | 2016 |
| Falcon Marine Limited | Cannock | 2006 |
| Falcon Mews Management Limited | Grimsby | 2007 |
| Falcon Precision Properties Ltd | Southampton | 2014 |
| Falcon Prestige Sales & Motorsports Ltd | Middlesbrough | 2011 |
| Falcon Sport (1966) Limited | Hemel Hempstead | 1946 |
| Falcon Traders Ltd | Glasgow | 2020 |
| Falcon Waves Ltd | London | 2026 |
| Falcon Yachting Limited | London | 2025 |
| Falcona Solutions Limited | Bracknell | 2026 |
| Falconer Road Property Limited | Haddenham | 1989 |
| Falconettis Limited | Harrogate | 2012 |
| Falconland Brighton Limited | London | 2000 |
| Falconline Limited | Manchester | 1995 |
| Falcontec Limited | Halesowen | 2013 |
| Faldane Limited | Bainsford | 1987 |
| Falder Matthews Limited | Chelmsford | 2014 |
| Falin (Midlands) Limited | Sutton Coldfield | 2006 |
| Falinower Limited | East Sussex | 1973 |
| Falk Ltd | Omagh | 2013 |
| Falkingham Limited | Rugby | 2018 |
| Falkirk Impex Ltd | Birmingham | 2020 |
| Falkland Press Limited | Letchworth Garden City | 2009 |
| Falkland Press Property Limited | Letchworth Garden City | 2013 |
| Falkopings Nattcafe Limited | London | 2019 |
| Fall OFF the Wall Trustee Limited | Toddington | 2024 |
| Falldalen Limited | London | 2023 |
| Fallen Oak Ltd | Worksop | 2023 |
| Fallmans Grav & Jordforbattring Invest Limited | London | 2023 |
| Fallowridge Ltd | Doncaster | 2026 |
| Falltide Press Limited | Ashford | 2025 |
| Falmec UK Limited | Colchester | 2019 |
| Falmouth Avenue Freehold Limited | London | 2018 |
| Falmouth District Pilot Boat Association(The) | Truro | 1887 |
| Falooday Wala Ltd | Hayes | 2021 |
| FAM Pedersen Limited | London | 2009 |
| Fama Identity PLC | Dover | 2009 |
| Famag Ltd | London | 2016 |
| Famato Ltd | London | 2011 |
| Fambh Limited | Ashford | 2021 |
| Famcore Ltd | Manchester | 2025 |
| Famechem Co., Limited | London | 2021 |
| Famella Building Contractors Ltd | Waltham Abbey | 2008 |
| Famfabrix Ltd | Wolverhampton | 2020 |
| Famhill Ltd | Bournemouth | 2022 |
| Familie Hofer Ltd | Manchester | 2023 |
| Familienheimatdw Ltd | Manchester | 2023 |
| Family & Life | | 2008 |
| Family 1ST Homecare Ltd | Rowley Regis | 2024 |
| Family Angels Ltd | Beaconsfield | 2009 |
| Family Cargo Bikes Limited | Christchurch | 2013 |
| Family Company Investments Limited | Leeds | 1966 |
| Family Contact Worker Ltd | Reading | 2024 |
| Family FUN 1 Ltd | London | 2019 |
| Family Funeral Services Limited | Sutton Coldfield | 1975 |
| Family Golf (Meyrick Park) Limited | Reading | 1997 |
| Family Graves Memorials Limited | Wolverhampton | 2009 |
| Family Law Week Limited | Corsham | 2011 |
| Family Money Limited | Brighton | 2015 |
| Family Options Limited | Bolton | 2009 |
| Family Pass Limited | Altrincham | 2019 |
| Family Search Limited | Crewe | 2013 |
| Family Shapes Childminder Limited | Milton Keynes | 2022 |
| Family Time Yachting Limited | London | 2020 |
| Family Violaris Ltd | Coventry | 2015 |
| Family Wellbeing Ltd | Luton | 2025 |
| Family Wisdom Ltd | London | 2025 |
| FAMO5 Ltd | Manchester | 2023 |
| Famous Filmwear Limited | Chatham | 2020 |
| Famous Folks Limited | Harrogate | 2012 |
| Famous Makers Limited | Taunton | 2018 |
| Famous Pies Limited | Coventry | 2008 |
| Famousfour.Com Limited | Louth | 2002 |
| Famvel Investment Ltd | London | 2020 |