| Foxpro Events Ltd | London | 2015 |
| Foxrock Foundation | London | 2017 |
| Foxrock Productions Ltd | Bristol | 2014 |
| Foxsake Films Limited | Enfield | 2023 |
| Foxton Equestrian Centre Limited | Market Harborough | 2021 |
| Foxton Inclined Plane Trust(The) | Market Harborough | 1982 |
| Foxtrot Alpha Recordings Limited | Usk | 2016 |
| Foxtrot Events Limited | Bromsgrove | 2018 |
| Foxtrot Racing Management Ltd | Leyburn | 2009 |
| Foxtrot Seven Ltd | Kettering | 2021 |
| Foxtrotter Coaching Ltd | Nottingham | 2024 |
| Foxwear Co Ltd | Lichfield | 2025 |
| Foxy Boxes Ltd | Kington | 2021 |
| Foxy Industries Ltd | Plymouth | 2022 |
| Foxy Tongue Voices Ltd | London | 2024 |
| Foxy Yoga Limited | Warrington | 2019 |
| Foxy's Field Ltd | Oldham | 2022 |
| Foyer Productions Ltd | London | 2021 |
| Foyers Publishing Ltd | Perth | 2025 |
| Foyle District Motor Cycle Club Limited | Londonderry | 1999 |
| Foyle Film Projects Limited | Londonderry | 1987 |
| Foymore Lodge Shooting School Ltd | Craigavon | 2005 |
| FOZ Motorsport Ltd | Bridgwater | 2017 |
| FP Cardiff Limited | Bristol | 2022 |
| FP Fitness Ltd | Basingstoke | 2019 |
| FP Online Limited | Swansea | 2017 |
| FP Sports Consulting Limited | London | 2018 |
| FP UK Operations Limited | Finchley | 2026 |
| FP2 Limited | Bourne | 2013 |
| FPA Sports Club CIC | Liverpool | 2024 |
| Fpercussionista Limited | London | 2025 |
| Fpinter Limited | London | 1963 |
| FPL (Investment) Limited | London | 2020 |
| FPL Family Limited | Kingston Upon Thames | 2019 |
| FPL Ltd | Wilmslow | 2024 |
| FPM Music Management Limited | London | 2022 |
| FPS Fitness Ltd | Birmingham | 2018 |
| FPV Drone Fest Ltd | Mansfield | 2023 |
| FPV Group Limited | Cardiff | 2019 |
| FQF Solutions Limited | Glasgow | 2025 |
| FQM Entertainment Limited | London | 2005 |
| FR Golf Consultancy Limited | Arbroath | 2025 |
| FR Holdings London Limited | Orpington | 2025 |
| FR Training Ltd | Spennymoor | 2019 |
| FR808DOM Ltd | Bristol | 2020 |
| FRA Smith Ltd | Cardiff | 2022 |
| Fracar Enterprises Ltd | Christchurch | 2010 |
| Fractal A/V Solutions Ltd | Exeter | 2025 |
| Fractal Lines Ltd | London | 2021 |
| Fractional Football Ltd | Cardiff | 2025 |
| Fracture Ltd | Leicester | 2024 |
| Fractured Pictures Ltd | Pinner | 2014 |
| Fraddon Motopark Limited | Newquay | 2023 |
| Fradley Football Club Ltd | Sutton Coldfield | 2022 |
| Fradley Marina Limited | Burton-On-Trent | 2015 |
| Frag Aviation Limited | Ashford | 2024 |
| Fraggle Jury Limited | Derby | 2013 |
| Fraggle's Rock Lighting Ltd | Bradford | 2015 |
| Fragile Fight Limited | Canterbury | 2017 |
| Fragile Media Ltd | London | 2012 |
| Fragments & Monuments | | 2006 |
| Fragor Games Limited | Isle Of Lewis | 2004 |
| Fragrantly Moist Limited | London | 2020 |
| Fraise Records Limited | Rayleigh | 2019 |
| Frakkur Limited | Southwark | 2017 |
| Fraktal Limited | London | 2013 |
| Fraktal Talent Ltd | Bradford | 2025 |
| Frakture Ltd | York | 2023 |
| Frame 2 Rochdale Ltd | Rochdale | 2026 |
| Frame 36 Ltd | Glasgow | 2023 |
| Frame London Limited | London | 2014 |
| Frame One Lounge Ltd | Leeds | 2025 |
| Frame One Television Limited | Tonbridge | 2004 |
| Frame Theory Ltd | Sheffield | 2025 |
| Frame Worldwide Ltd | Harrow | 2019 |
| Frameless Creative Limited | London | 2022 |
| Frameless Entertainment Limited | London | 2025 |
| Frameless London Ltd | London | 2021 |
| Frames of Impact CIC | Cardiff | 2025 |
| Frames Snooker Club Limited | Leamington Spa | 2007 |
| Frametastic Ltd | London | 2018 |
| Framework Central Ltd | Cambridge | 2016 |
| Framework Pilates Ltd | St. Albans | 2023 |
| Framework Property Maintenance Ltd | Hove | 2025 |
| Framewrx Group Ltd | Aberdeen | 2025 |
| Framewrx Method Ltd | Aberdeen | 2025 |
| Framingdale Ltd. | Ascot | 2021 |
| Framlingham Livestock Association | Stowmarket | 1990 |
| Frampton Cotterell Rugby Football Club | Winterbourne | 2011 |
| Frampton Country Fair Limited | Gloucester | 2007 |
| Frampton Youth Football Club | Stroud | 2019 |
| Fran on Violin Ltd | London | 2026 |
| Franbury Ltd | Milton Keynes | 2019 |
| Franc Moody Limited | London | 2018 |
| France Carp Limited | Swindon | 2002 |
| France-Lise Ltd | Glasgow | 2022 |
| Frances a Jolland Ltd | London | 2026 |
| Frances Bell Limited | Alnwick | 2024 |
| Frances Games Limited | Stanstead Abbotts | 2020 |
| Frances Jolland Ltd | London | 2025 |