| FTF Tech Limited | Brighton | 2019 |
| FTF Worldwide Limited | Old Hatfield | 1996 |
| FTG Electrical Ltd | Letchworth Garden City | 2023 |
| Ftgc Limited | St Helens | 2016 |
| FTH Holdings Ltd | London | 2020 |
| FTI (Secretariat) Limited | London | 2001 |
| FTM Investment Services Ltd | Bramhall | 2014 |
| Ftnb Capital Ltd | London | 2022 |
| FTS Capital Limited | Milton Keynes | 2023 |
| FTS Group (Scotland) Ltd | Glasgow | 2016 |
| FTS Hire Ltd | Glasgow | 2016 |
| FTS Plant Ltd | Glasgow | 2016 |
| FTS WFG Ltd | London | 1992 |
| Ftvm Co Ltd | Ongar | 2019 |
| FTY FLY Ltd | Eastleigh | 2022 |
| FU LE Trading Co., Limited | Beckenham | 2019 |
| FU Limited | Newmarket | 2014 |
| Fu's Roast Limited | Glasgow | 2025 |
| Fubon Bandung Investment Group Ltd | London | 2021 |
| Fucang Brand Commercial Limited | Manchester | 2023 |
| Fudal Ltd | Leicester | 2017 |
| Fudge Kitchen Group Trustee Limited | Folkestone | 2022 |
| Fuel (a Registered Trade Mark) Graphic Design Limited | Kent | 2003 |
| Fuel and Combustion Technology International Limited | Warrington | 1994 |
| Fuel Angel Limited | Darlington | 2008 |
| Fuel Check Limited | Worksop | 2020 |
| Fuel Connect Ltd | London | 2024 |
| Fuel GAS Services Limited | Whitley Bay | 2006 |
| Fuel Master Limited | Hull | 2018 |
| Fuel Oils Limited | Erith | 1996 |
| Fuel Solutions Limited | Newcastle Under Lyme | 2010 |
| Fuel Stop (UK) Ltd | Hertfordshire | 2002 |
| Fuel-It Ltd | Tamworth | 2012 |
| Fuelcell UK Limited | Edinburgh | 2014 |
| Fuelseeker Limited | Larbert | 2008 |
| Fuelsmart (UK) Ltd | Chorley | 2012 |
| Fuelsolve Limited | Wirral | 2007 |
| Fuerte Management Ltd | Coventry | 2018 |
| Fugazi Services Ltd | London | 2016 |
| Fuglyfruit Ltd | Wednesbury | 2017 |
| Fuhaiyoubang Shipping Service Limited | Gillingham | 2020 |
| Fuji Elevator Limited | Beckenham | 2017 |
| Fuji Sand Ltd | London | 2021 |
| Fujia International Limited | Cambridge | 2012 |
| Fujia Laser Technology Co., Ltd | London | 2013 |
| Fujian Daidong Trading Co., Limited | Beckenham | 2015 |
| Fujian Eksapower Import & Export Co., Ltd | Beckenham | 2015 |
| Fujian Minqing Xinfeng Ceramics Co., Limited | Beckenham | 2017 |
| Fujian Unik Industrial Co., Ltd | Beckenham | 2021 |
| Fujienergy Limited | Greenford | 2025 |
| Fujifilm Speciality INK Systems Pension Plan Trustee Limited | Broadstairs | 2003 |
| Fujin Ltd | London | 2024 |
| Fujitec Group Limited | London | 2021 |
| Fujitsu (FTS) Pension Trustees Limited | Bracknell | 2020 |
| Fujitsu Comparable Pension Trust Limited | Bracknell | 1995 |
| Fujitsu Services (Flexible Finance) Limited | Bracknell | 1992 |
| Fujitsu Services (Investments) Limited | Bracknell | 1993 |
| Fujitsu Services (Medical Plan Trustee) Limited | Bracknell | 1995 |
| Fujitsu Services Capital Limited | Bracknell | 2003 |
| Fujitsu UK Pension Trust Limited | Bracknell | 2003 |
| Fukas Industry Group Limited | Beckenham | 2018 |
| Fuland Group Ltd. | London | 2024 |
| Fulbourn Wood Ltd | Huntingdon | 2013 |
| Fulcrum (England) Ltd | Northampton | 2010 |
| Fulcrum Accountants Limited | Milton Keynes | 2018 |
| Fulcrum FM Holdings Limited | London | 2022 |
| Fuldamobil Limited | London | 2017 |
| Fulfilled Promises Ltd | London | 2014 |
| Fulfillers Ltd | London | 2026 |
| Fulford Grange Medical Centre Limited | London | 1993 |
| Fulgent Limited | Pershore | 2018 |
| Fulgor Milano UK Limited | Colchester | 2024 |
| Fulham Pottery and Fine Art Limited | Kings Road | 2003 |
| Fulin Global Trade Ltd | London | 2019 |
| Fuljet Co., Ltd | Beckenham | 2011 |
| Fulkers Limited | London | 2019 |
| Full Circle Bedrooms Limited | Scunthorpe | 1980 |
| Full Circle Care Agency Limited | Mansfield | 2016 |
| Full Circle Catering Agency Limited | Mansfield | 2016 |
| Full Circle Contracting Services Limited | Bedford | 2012 |
| Full Compass Fit OUT Limited | Swansea | 2018 |
| Full Connection Limited | Dunmow | 2019 |
| Full Essentials Limited | Coventry | 2021 |
| Full FAT Electronics Ltd | Welwyn | 2020 |
| Full FAT Motors Ltd | Banbury | 2023 |
| Full Fresh Ltd | Edgware | 2014 |
| Full FUN Art and Craft Limited | Cambridge | 2015 |
| Full House Live Ltd | Sutton | 2025 |
| Full House Pantomime Ltd | Sutton | 2025 |
| Full House Stage Ltd | Sutton | 2025 |
| Full House Theatres Production Ltd | Sutton | 2025 |
| Full Link Ltd | Birmingham | 2017 |
| Full Living Limited | Welwyn Garden City | 2015 |
| Full Management Ltd | Oldham | 2023 |
| Full Monty 1 Limited | Rainham | 2018 |
| Full of Goodness Limited | Hunslet | 2018 |
| Full of Ideas Ltd | London | 2004 |
| Full Power Records Ltd | London | 2023 |
| Full Power Tuning Ltd | Bristol | 2023 |
| Full Property Services Limited | Salisbury | 2007 |