| Francis Valeting Ltd | Norwich | 2021 |
| Francis Wain Limited | Norfolk | 1998 |
| Francis Webster & Sons (Sales) Limited | Rochdale | 1961 |
| Francis Willey (English) Limited | Bingley | 2003 |
| Francis Willey (Synthetics) Limited | Slaithwaite | 1960 |
| Franco Capital Management Limited | Whetstone | 2014 |
| Francois James Ltd | Leicester | 2022 |
| Frandcom Industrial Limited | London | 2008 |
| Frangel Limited | Canvey Island | 2020 |
| Frangipani Dreams Limited | Alconbury Weald, Huntingdon | 2010 |
| Frani's Fashion Ltd | London | 2024 |
| Frank and Steiner Ltd | Northampton | 2022 |
| Frank Barnes (Consultancy) Limited | Blackburn | 1998 |
| Frank Books Ltd | Margate | 2018 |
| Frank Dale Foods Ltd | Norwich | 2019 |
| Frank Edward Haley Limited | Twickenham | 2025 |
| Frank Harris and Company Limited | Teddington | 2008 |
| Frank Maschinen-Technik Ltd | Kenilworth | 2015 |
| Frank Stephenson & SON (Funeral Directors) Limited | Sutton Coldfield | 1979 |
| Frank Valori Demolition & Civils Limited | London | 2013 |
| Frankab Limited | Manchester | 2025 |
| Frankby 1960 Limited | Wirral | 2014 |
| Franke Smythson Co., Limited | Beckenham | 2020 |
| Frankester Solutions Ltd | Swindon | 2022 |
| Frankham Estates Limited | Faversham | 2023 |
| Frankie Media Limited | Corsham | 2022 |
| Frankincense Retreats Limited | Exeter | 2019 |
| Franking First Limited | West Byfleet | 2012 |
| Frankland Housings Ltd | Blackburn | 2024 |
| Franklin Bensons Investments Ltd. | London | 2015 |
| Franklin Crafts & Toys Co., Ltd. | Beckenham | 2016 |
| Franklin Ellis EOT Limited | Nottingham | 2022 |
| Franklin Facilities Limited | High Wycombe | 2022 |
| Franklin James Entertainments Ltd | Ellesmere Port | 2020 |
| Franklin Medical Solutions Limited | Northampton | 2024 |
| Frankly MR Franky Limited | Stockport | 2022 |
| Franks Curtis Limited | Brigg | 2012 |
| Frankson Limited | Birmingham | 2012 |
| Franlew Ltd | Edinburgh | 2011 |
| Frantec Automotive Ltd | Harrow | 2025 |
| Franze UK Limited | Birkenhead | 2021 |
| Fraoch Investments Limited | Hampton | 2009 |
| Fraser Bell Limited | Bromborough | 2012 |
| Fraser Bruce (Holdings) Limited | | 2006 |
| Fraser Fire Alarms Limited | Coatbridge | 2008 |
| Fraser Hamilton Limited | London | 1998 |
| Fraser Hammerton Group Holdings Ltd | Plymouth | 2017 |
| Fraser Lancastrian Services Limited | Blackburn | 2018 |
| Fraser Lockhart Limited | Harrogate | 2025 |
| Fraser Lovat Limited | Midhurst | 1956 |
| Fratelli Hair Cambridge Limited | Cambridge | 2018 |
| Fratelli Rossetti Limited | London | 2016 |
| Frates Ltd | Longfield | 2020 |
| Fraud Control Limited | Herne Bay | 2008 |
| Fraud Prevention Limited | Harrogate | 2013 |
| Fraud Risk Investigations Limited | London | 2009 |
| Frax Limited | London | 2015 |
| Fraydean Limited | Bridgend | 2025 |
| Frays Property Management (NO.1) Limited | York | 2000 |
| Frays Property Management (NO.2) Limited | York | 2000 |
| Frays Property Management (NO.6) Limited | York | 2001 |
| Frayward Limited | Bridgend | 2025 |
| Frazer Cloud Ltd | Newark | 2016 |
| Frbc Rooofers and Builders Ltd | Airdrie | 2024 |
| FRC Consulting Ltd | Brighton & Hove | 2020 |
| FRC Portfolio Ltd | Royston | 2015 |
| FRC Storage Limited | Dunstable | 2013 |
| FRE3DOM Systems Ltd | Bristol | 2021 |
| Freakish Limited | Harrogate | 2026 |
| Frebo Marketing Ltd | Bicester | 2014 |
| Freckle & Hyde Limited | Maidstone | 2011 |
| Frecos Holdings Limited | Newton Abbot | 2019 |
| Fred 154 Limited | Oxford | 2011 |
| Fred Balls Fastenings Limited | Beverley | 2008 |
| Fred Chappell Limited | Ossett | 1949 |
| Fred Husbyaune Limited | Kington | 2024 |
| Fred Mcpetrie Ltd | Kingsbridge | 2016 |
| Fred Pilkington and SON Limited | Harrogate | 1981 |
| Fred Sherwood & Sons (Trading) Limited | Leicestershire | 2007 |
| Fred Steinhaug Invest Limited | London | 2026 |
| Fred the Tread Ltd | Milton Keynes | 2024 |
| FREDD1E Ltd | Harrogate | 2020 |
| Freddel Joseph Thompson Ltd | Tilbury | 2024 |
| Freddie 2009 Limited | London | 2005 |
| Freddie Cann Limited | Norwich | 2002 |
| Freddie Consulting Ltd | Brighton & Hove | 2019 |
| Freddie Grubb Limited | Cambridge | 2011 |
| Freddy Johansen Invest Limited | London | 2022 |
| Fredericas Limited | Stevenage | 2012 |
| Frederick Beesley Ltd | London | 2014 |
| Frederick George Limited | Deal | 2011 |
| Frederick Hugh Tait Ltd | Dunfermline | 2024 |
| Frederick Street Bars Ltd | Edinburgh | 2015 |
| Frederick W. Chitty & Co. Limited | Sutton Coldfield | 1945 |
| Frederick Whitfield Griffith Limited | London | 2023 |
| Frederick-Trevor Congdon Limited | Bude | 2022 |
| Fredi's Grill & Taverna Ltd | New Romney | 2019 |
| Fredjar Ltd | London | 2014 |
| Fredk. W. Paine Limited | Sutton Coldfield | 1938 |
| Fredmans Limited | Merseyside | 2005 |