| Fengqi Group Co., Ltd | Kenilworth | 2019 |
| Fengyuan Chemical Co., Ltd | London | 2019 |
| Fengzhan Trading Co., Ltd | Cambridge | 2020 |
| Fenice Massage Therapy Ltd | London | 2020 |
| Fenimore Group Limited | Harrogate | 2025 |
| Fenix Interiors Ltd | Altrincham | 2021 |
| Fenix Yachting Ltd | Bromley | 2025 |
| Fenja Ltd | London | 2022 |
| Fenland Eco Builders (Soham) Limited | March | 2010 |
| Fenland Equestrian Centre Ltd | Wisbech | 2012 |
| Fenland Recruitment Limited | Wisbech | 2010 |
| Fenleigh Limited | Coventry | 2025 |
| Fenn Graphics Limited | Lowestoft | 1995 |
| Fenn Norge Limited | London | 2011 |
| Fennec Electrical Ltd | Bury St. Edmunds | 2026 |
| Fennult Designs Ltd | Bathgate | 2010 |
| Fennyboy Ltd | Southampton | 2020 |
| Fenris Sports (UK) Limited | London | 2022 |
| Fensome and Payne Limited | Wisbech | 2015 |
| Fenster Bifold Limited | Bury | 2012 |
| Fenstone Quarries Limited | East Yorkshire | 2005 |
| Fentech Solutions Limited | Manchester | 2021 |
| Fentech Systems Limited | Watford | 2017 |
| Fenton Barns (Mushrooms) Limited | East Lothian | 1987 |
| Fenwick Industries Limited | Harrogate | 2026 |
| Fenwick Investments Limited | South Lanarkshire | 2000 |
| Fenwold Veterinary Practice Limited | Bristol | 2005 |
| FEP Ltd | Yeovil | 2022 |
| Fepper Ltd | London | 2023 |
| Ferdinand Aeroplane Maintenance Limited | London | 2016 |
| Ferdinand Management Ltd | Coventry | 2015 |
| Ferdous Properties Ltd | Woodford Green | 2016 |
| Fergie Sent ME Ltd | East Kilbride | 2012 |
| Fergus Ltd | Harrogate | 2013 |
| Ferguson Asia Limited | Kenilworth | 2007 |
| Ferguson Winnersh Finance (Theale) Limited | Berkshire | 2003 |
| Ferguson Winnersh Properties Limited | Berkshire | 1964 |
| Fergusson Hoskins Estates Limited | Derby | 2019 |
| Ferguy Heights Management Company Limited | Co Tyrone | 2006 |
| Ferikizi Fora Ltd | London | 2023 |
| Ferkingstad Consulting Services Limited | Cardiff | 2025 |
| Ferlim Nominees Limited | London | 1971 |
| Ferman Fine Foods Ltd | Bradford | 2017 |
| Fermanagh Feeds Limited | | 1978 |
| Fermat Consulting Limited | Huntingdon | 2010 |
| Ferme Park Mansions RTM Company Limited | London | 2008 |
| Fermenter Limited | Bristol | 2015 |
| Fermex Limited | Worcester | 2003 |
| Fermoy Road 1955 Limited | London | 2015 |
| Fern Cissokho Limited | Brighton | 2024 |
| Fern Crest Realty Group Ltd | Manchester | 2026 |
| Fern Line Capital Management Ltd | Manchester | 2026 |
| Fern Marketing Ltd | Liskeard | 2022 |
| Ferna Limited | Richmond | 2017 |
| Fernco Environmental Limited | Macclesfield | 2013 |
| Fernco International Limited | Barnsley | 2004 |
| Ferncrest Limited | Enfield | 2004 |
| Ferneyley Investments Limited | Gloucestershire | 1945 |
| Fernhurst Colden Common Management Company Limited | Winchester | 2007 |
| Fernica Residential Care Home Limited | Manchester | 2012 |
| Fernlea Management Co (Salcombe) Limited | Reigate | 2015 |
| Fernlea Road Management Company (London) Limited | Surrey | 2005 |
| Fernmoor Textiles Co.Limited | New Mill Huddersfield | 1968 |
| Fernride Limited | Bridgend | 2025 |
| Ferns Group Limited | Maidstone | 2015 |
| Ferns Infrastructure Limited | Maidstone | 2024 |
| Fernvale Properties Limited | Manchester | 2021 |
| Fernwood Park Limited | Honeybourne | 2025 |
| Ferrari Private Investments Company Ltd | London | 2023 |
| Ferratsi Bathrooms Limited | Leeds | 2011 |
| Ferratsi Limited | Leeds | 2006 |
| Ferriers PIT Ltd | Bures | 2013 |
| Ferries Ltd | London | 1998 |
| Ferries Trains Planes Ltd | London | 2008 |
| Ferrinho Ltd | Chesterfield | 2018 |
| Ferris Holdings 2011 Ltd | Nottingham | 2011 |
| Ferris Painting Contractors Limited | Eastleigh | 1999 |
| Ferruccio Limited | Harrogate | 2026 |
| Ferry 1967 Limited | Wakefield | 2013 |
| Ferry Quay Developments Limited | York | 1989 |
| Ferrybridge Workshops RE Limited | London | 2025 |
| Ferryfield Developments Ltd | Barnet | 2011 |
| Ferryton Limited | Edinburgh | 2017 |
| Ferryvale Property Ltd | Stanmore | 2014 |
| Ferryveer Limited | Hyde | 1985 |
| Fertility Focus Limited | Haslemere | 2021 |
| Fertility Talent Limited | York | 2021 |
| Fertilizer + Chemical Consultancy Limited | London | 2003 |
| Feruge Ltd | Hove | 2023 |
| FES (Scotland) Limited | Stirling | 2008 |
| FES Contracts Limited | Stirling | 2006 |
| FES Services Limited | Stirling | 2006 |
| FES Systems Limited | Stirling | 2006 |
| FES Utilities Limited | Stirling | 2006 |
| Fesc Limited | Croydon | 2015 |
| Feslunt Ltd | Beckenham | 2021 |
| FEST1VAL Limited | Harrogate | 2026 |
| Festim Limited | Northolt | 2019 |
| Festival & Events Group Ltd | Manchester | 2014 |
| Festival Fifty One Limited | Bristol | 2013 |