| Filling the Void Ltd | London | 2017 |
| Fillingham Enterprises Ltd | Robertsbridge | 2023 |
| Fillingham Martial Arts Ltd | London | 2022 |
| Film & Digital Services Limited | Epsom | 2013 |
| Film & Photographic Ltd | Middlesex | 2006 |
| Film & TV Sculptor Ltd | St. Albans | 2018 |
| Film Art & Design Ltd | Stevenage | 2022 |
| Film Associates Ltd | Kidderminster | 2020 |
| Film Camp Ltd | Egham | 2017 |
| Film City Glasgow Limited | Glasgow | 2001 |
| Film City Limited | Glasgow | 2013 |
| Film Club Entertainment Limited | Croydon | 2022 |
| Film Collectables Competitions Limited | Belfast | 2025 |
| Film Design Limited | London | 2009 |
| Film Factory Library Ltd | London | 2023 |
| Film Festival Promotions Ltd. | London | 2016 |
| Film Fifty LDA Limited | Harpenden | 2025 |
| Film Files Club Ltd | London | 2023 |
| Film FIX Ltd | Iver | 2024 |
| Film Hub Limited | Warrington | 2025 |
| Film Industry Talent Limited | London | 2011 |
| Film Innovation Location Media Ltd | Bodmin | 2015 |
| Film Medical Services Limited | Uxbridge | 1990 |
| Film Rights Limited | London | 1932 |
| Film Textiles Limited | Dorking | 2025 |
| Film Transmission Limited | Poole | 2018 |
| Film Vehicle Sourcing Ltd | Glasgow | 2019 |
| Filmaluation Limited | Croydon | 2013 |
| Filmcraft Limited | Sheffield | 1994 |
| Filmcrest Distributors Limited | London | 1976 |
| Filmd Ltd | Preston | 2020 |
| Filmd Services Ltd | Preston | 2022 |
| Filmee Films Ltd | Birmingham | 2026 |
| Filmhouse (Edinburgh) Ltd | Edinburgh | 2022 |
| Filmingo Limited | London | 2017 |
| Filmon.Tv UK Limited | Harrow | 2008 |
| Filmore Brown Productions Ltd | 5Th Floor | 2024 |
| Filmpro C.I.C. | London | 2009 |
| Films at Draper Hall Ltd | London | 2019 |
| Filmsim Ltd | Peterborough | 2008 |
| Filmusicompany Ltd | Essex | 2020 |
| Filsell Fitness Studio Limited | Hailsham | 2024 |
| Filskit Theatre Ltd | Southampton | 2020 |
| Filter Theatre | Watford | 2009 |
| Filter Union Limited | Liverpool | 2017 |
| Filth Comedy Productions Ltd | London | 2025 |
| Filth Events Ltd | Birmingham | 2018 |
| Filthy Friday Ltd | Manchester | 2019 |
| Filton Golf Club (1979) Limited | Filton | 1978 |
| Filtow Limited | Haltwhistle | 2011 |
| Filtr Sports Ltd | Richmond | 2021 |
| Filu Limited | London | 2026 |
| Filum Ltd | Chipping Norton | 2025 |
| Filwood Playing Field Trust | Bristol | 2001 |
| Fimbo Fitness UK Ltd | Cambridge | 2026 |
| FIN DE Fiesta CIC | Folkestone | 2022 |
| FIN FAR FAI Ltd | Glasgow | 2019 |
| FIN Marketing & Communications Limited | Sidcup | 1983 |
| FIN Taylor Ltd | London | 2025 |
| FIN Tours Limited | London | 2014 |
| Final Call Creative Ltd | Hereford | 2018 |
| Final Call Production Theatre Company Ltd | Carshalton | 2015 |
| Final Form Entertainment Ltd | Lancaster | 2019 |
| Final Form Fitness Limited | Brackley | 2023 |
| Final Girl Limited | London | 2020 |
| Final Run Company Ltd | London | 2025 |
| Final Third Events Ltd | London | 2026 |
| Final Tree Ltd | Burton-On-Trent | 2025 |
| Final Whistle Agency Ltd | London | 2025 |
| Final Whistle Ltd | Loughborough | 2019 |
| Finalframefilms Ltd | Sidcup | 2021 |
| Finally Here Productions Limited | London | 2024 |
| Finalpoint Ltd | Erith | 2026 |
| Financial Promotion Ltd | Walton On The Hill | 2009 |
| Finarte Ltd | London | 2013 |
| Finbarn Ltd | Co Down | 2003 |
| FINBAX1 Limited | Newport | 2024 |
| Finbo Adventure Ltd | North Berwick | 2020 |
| Finborough Theatre | London | 1997 |
| Finca Art Ltd | London | 2019 |
| Finch 24 Limited | Market Harborough | 2014 |
| Finch and Company Fine Art Limited | London | 2023 |
| Finch Fitness Limited | Tysea Hill, Stapleford Abbots | 2025 |
| Finch Studio Limited | Winchester | 2005 |
| Finch Visuals Ltd | Glasgow | 2024 |
| Finchcocks Ltd | London | 2016 |
| Finchingfield Windmill CIC | Braintree | 2025 |
| Finchley Golf Club Limited | London | 1929 |
| Finchley Symphony Orchestra Limited | London | 2020 |
| Find a Holiday Buddy Limited | Egham | 2008 |
| Find a Performer Ltd | Lewes | 2003 |
| Find a Way by LC Ltd | Nottingham | 2025 |
| Find an ACT Ltd | Cambridge | 2019 |
| Find an Entertainer Limited | Rushden | 2026 |
| Find My Bricks Limited | Manchester | 2021 |
| Find My Business Services Ltd | Bristol | 2024 |
| Find My Facility Ltd | Devizes | 2019 |
| Find My Hospitality Limited | Bristol | 2010 |
| Find the Balance Limited | London | 2004 |
| Find the Beat Ltd | London | 2025 |