| Fulfilrr Group Limited | Administrative & support | 2014 |
| FULGENCE2025 Ltd | Hospitality | 2025 |
| Full Bore Plumbing & Heating Limited | Construction | 2026 |
| Full Feast Catering Ltd | Hospitality | 2019 |
| Full Metal Skillet Ltd | Hospitality | 2018 |
| Full Support Care Services Ltd | Administrative & support | 2014 |
| Full Support Recruitment Ltd | Administrative & support | 2019 |
| Full Tilt Blog Limited | Information & communication | 2008 |
| Full Tilt Poker Limited | Information & communication | 2008 |
| Fullcircleconsultancy Ltd | Administrative & support | 2022 |
| Fullers Family Law Limited | Professional & scientific | 2012 |
| Fullers Property Development Limited | Construction | 2017 |
| Fullers Slade Auto Centre Ltd | Wholesale & retail | 2022 |
| Fullfeast Ltd | Hospitality | 2014 |
| Fullon Hobbies Ltd | Wholesale & retail | 2022 |
| Fully Properties Ltd | Real estate | 2024 |
| FULLYFILAMENT3D Ltd | Manufacturing | 2025 |
| Fulwoods Drive 1955 Limited | Extraterritorial | 2014 |
| FUN 4 ALL Rides Limited | Arts & recreation | 2002 |
| FUN Fiesta Limited | Information & communication | 2015 |
| Funeral Supplies Ltd | Other services | 2018 |
| Funk Productions Limited | Professional & scientific | 2008 |
| Funkin Limited | Other services | 1999 |
| Funkin USA Limited | Wholesale & retail | 2006 |
| Funky Divas Morrisons Ltd | Other services | 2014 |
| Funky Huts Ltd | Construction | 2022 |
| Funrise International Limited | Administrative & support | 2001 |
| Furmanac Limited | Manufacturing | 1972 |
| Furniche Home Limited | Wholesale & retail | 2007 |
| Furnish Straps Limited | Wholesale & retail | 2024 |
| Furniture Avenue Limited | Wholesale & retail | 1997 |
| Furniture Group Manufacturing Limited | Manufacturing | 1997 |
| Furny Ltd | Information & communication | 2023 |
| Furtho Consulting Ltd | Information & communication | 2010 |
| Furtho Events Limited | Arts & recreation | 2016 |
| Furtho Farm Limited | Agriculture & fishing | 1997 |
| Furzehill Parade Residents Association Limited | Households | 1985 |
| Fusames Solutions Ltd | Health & social care | 2020 |
| Fuse PC Limited | Professional & scientific | 2014 |
| Fuseade Limited | Construction | 2012 |
| Fusemetrix Group Limited | Information & communication | 2014 |
| Fusemetrix Holdings Limited | Information & communication | 2022 |
| Fusex Limited | Information & communication | 2025 |
| Fusi Hair Limited | Other services | 2013 |
| Fusion Flavors Ltd | Wholesale & retail | 2024 |
| Fusion IT Media Limited | Extraterritorial | 2026 |
| Fusion Living Properties Ltd | Real estate | 2021 |
| Fusion MK Ltd | Hospitality | 2025 |
| Fusion on Wheels Ltd | Hospitality | 2025 |
| Fusion Path Limited | Wholesale & retail | 2008 |
| Fusion Property Innovations Ltd | Construction | 2024 |
| Fusion Solutions Consulting Ltd. | Water & waste | 2012 |
| Fusionmadness Limited | Wholesale & retail | 2024 |
| Future Bridge CIC | Information & communication | 2026 |
| Future Care Enable Ltd | Administrative & support | 2016 |
| Future Carpet Cleaning Services Ltd | Administrative & support | 2002 |
| Future Cleaning Services (Southwest) Ltd | Administrative & support | 1999 |
| Future Cleaning Services Limited | Administrative & support | 2004 |
| Future Global Investment Limited | Wholesale & retail | 2019 |
| Future Green Upgrades Limited | Construction | 2026 |
| Future Knights Ltd | Wholesale & retail | 2020 |
| Future Legal Limited | Professional & scientific | 2021 |
| Future Organisational Culture & Change Ltd | Professional & scientific | 2021 |
| Future Proof Creative Ltd | Information & communication | 2015 |
| Future Proof Sales (London) Ltd | Administrative & support | 1976 |
| Future Residentals Ltd | Real estate | 2026 |
| Future Tech Innovations-Fti Ltd | Information & communication | 2025 |
| Future Tense Limited | Wholesale & retail | 2024 |
| Future Transfers Ltd | Wholesale & retail | 2023 |
| Future Wills Ltd | Professional & scientific | 2017 |
| FUTURE20 Limited | Professional & scientific | 2008 |
| Futures for Somerset Limited | Construction | 2010 |
| Futurewerk Consultancy Services Limited | Information & communication | 2020 |
| Futuristic Payroll Services Limited | Professional & scientific | 2024 |
| Futurus Token Ltd | Other services | 2022 |
| Fuzzy.Travel UK Limited | Information & communication | 2024 |
| FVH Distribution Services Ltd | Transport & logistics | 2020 |
| FW COX Metals Ltd | Extraterritorial | 2024 |
| FW Sushi Bar Ltd | Hospitality | 2023 |
| Fwrd Digital and Product Ltd | Professional & scientific | 2023 |
| Fxip Consulting Ltd. | Professional & scientific | 2014 |
| Fylde Coast Gate Limited | Manufacturing | 2003 |
| Fymm Ltd | Financial services | 2021 |
| Fyrst Ltd | Other services | 2023 |
| Fyrst One Ltd | Other services | 2023 |
| Fz-Tech Ltd | Information & communication | 2018 |
| FÉ Care Ltd | Health & social care | 2019 |
| G & D Newman Limited | Hospitality | 2012 |
| G & G Autos Limited | Wholesale & retail | 2013 |
| G & J Logistics Limited | Manufacturing | 2001 |
| G & R Flooring Limited | Construction | 2014 |
| G & S Sign Services Ltd | Administrative & support | 2009 |
| G and a Developments Limited | Construction | 2008 |
| G and W Property Services Limited | Real estate | 2023 |
| G B Autos Group Limited | Other services | 2023 |
| G Cunningham Builders Ltd | Construction | 2024 |
| G Dads Collectables Limited | Wholesale & retail | 2010 |
| G Dads Furniture Ltd | Wholesale & retail | 2013 |
| G Goods Ltd | Professional & scientific | 2020 |
| G HAK Limited | Health & social care | 2024 |