| Frytow Limited | Professional & scientific | 2010 |
| FS Hair Ltd | Other services | 2019 |
| FS Property & Land Investments Ltd | Real estate | 2024 |
| FS3 Propery Investment Ltd | Real estate | 2022 |
| FSC Vehicle Repair & Hire Limited | Wholesale & retail | 2025 |
| FSE Plumbing & Heating Ltd | Construction | 2025 |
| FSF Properties Limited | Real estate | 2009 |
| FSF Property Limited | Real estate | 2016 |
| FSG Partners Ltd | Real estate | 2025 |
| FSK Gardeners Ltd | Other services | 2019 |
| FSN D&A Limited | Health & social care | 2021 |
| FSN Holdings Limited | Financial services | 2025 |
| FTJ Properties Ltd | Construction | 2014 |
| FTL Resources Limited | Real estate | 2013 |
| FTP International Ltd | Water & waste | 2021 |
| Fuchsia Homes Ltd | Real estate | 2017 |
| Fuelco Limited | Manufacturing | 2021 |
| Fugen UK Limited | Wholesale & retail | 2010 |
| Fuji Studios Ltd | Information & communication | 2019 |
| Fulham Glass Company Limited | | 1988 |
| Full Stack Analytics Limited | Other services | 2022 |
| Full Tilt Limited | Professional & scientific | 2015 |
| Fullerton Turner Limited | Other services | 2014 |
| Fulton Rose Limited | Professional & scientific | 2019 |
| Fulwood Close Management Company Limited | Households | 1969 |
| Functional Wellness Ltd | Wholesale & retail | 2025 |
| Functionpoint Limited | Information & communication | 1991 |
| Fundamental Asset Management Limited | Financial services | 2004 |
| Funding Partners 1 Ltd | Professional & scientific | 2021 |
| Fundthegreats Ltd | Information & communication | 2026 |
| Funkids Nurseries Ltd | Education | 2018 |
| Funky Elephant Watford Limited | Hospitality | 2024 |
| Funky Monkey Events Ltd | Wholesale & retail | 2018 |
| Funky YAK Limited | Wholesale & retail | 2013 |
| Funny Face Pizza Limited | Hospitality | 2020 |
| Furat Investment Limited | Real estate | 2011 |
| Furness Kindle & Flint Limited | Information & communication | 2007 |
| Furniture Wholesale Comp Limited | Administrative & support | 2024 |
| Furoma Ltd | Administrative & support | 2026 |
| Fuselodge Limited | Other services | 1999 |
| Fusion 2 Cardiff Limited | Real estate | 2025 |
| Fusion Bliss Limited | Wholesale & retail | 2024 |
| Fusion Financial Services Limited | Financial services | 2022 |
| Fusion Information Technology Limited | Information & communication | 2015 |
| Fusion Rail Ltd | Construction | 2017 |
| Fusion Spice (Kent) Ltd | Hospitality | 2015 |
| Fusion Wear Ltd | Wholesale & retail | 2024 |
| Fusobotics Limited | Information & communication | 2023 |
| Fuss Pots Limited | | 1988 |
| Fussell Consultancy Limited | Real estate | 2009 |
| Futr World Limited | Professional & scientific | 2015 |
| Futture Homes Limited | Financial services | 2011 |
| Futture Ltd | Construction | 2015 |
| Future Connect Ltd | Wholesale & retail | 2025 |
| Future Connect Media Ltd | Information & communication | 2019 |
| Future Deal Ltd | Wholesale & retail | 2012 |
| Future Fourways Limited | Real estate | 2017 |
| Future IT Software Ltd | Information & communication | 2013 |
| Future Think Limited | Education | 2011 |
| Future Ventures Investment Limited | Real estate | 2018 |
| Future Zoom Limited | Information & communication | 2014 |
| Futuretext Ltd | Information & communication | 1999 |
| Fuze Studio Limited | Administrative & support | 2023 |
| Fuzion Engineering Services and Trader Ltd | Manufacturing | 2025 |
| FV Building Materials Ltd | Wholesale & retail | 2025 |
| FV Consultant Ltd | Construction | 2010 |
| FVS Electrical Limited | Construction | 2021 |
| FWA Consulting Ltd | Professional & scientific | 2026 |
| Fwdp Plumbing & Heating Services Ltd | Construction | 2016 |
| Fwdp Property Investments Ltd | Real estate | 2022 |
| Fwrd Visuals Limited | Professional & scientific | 2023 |
| Fxcet Ltd | Manufacturing | 2025 |
| FYH Trading Limited | Wholesale & retail | 2013 |
| Fysik 20 Limited | Arts & recreation | 2024 |
| FZK Limited | Construction | 2025 |
| G & Co Housekeeping Limited | Administrative & support | 2018 |
| G & H Fast Foods Ltd | Hospitality | 2018 |
| G & I Enterprise Ltd | Real estate | 2023 |
| G & P Lions Ltd | Professional & scientific | 2025 |
| G & S Associates Limited | Households | 1996 |
| G & S Contract Agents and General Trading Limited | Wholesale & retail | 2010 |
| G & T Resources (Europe) Limited | Wholesale & retail | 2001 |
| G & V Sweet for Everyone Ltd | Hospitality | 2019 |
| G a B Drylining Ltd | Construction | 2026 |
| G a B Drywall Ltd | Construction | 2023 |
| G and B Plastic Supplies Ltd | Wholesale & retail | 2018 |
| G C Homes UK Ltd | Construction | 2007 |
| G Chebli Limited | Construction | 2014 |
| G Construction Contractors Limited | Construction | 2011 |
| G Corporate Ltd | Real estate | 2020 |
| G Finance Corporate Ltd | Real estate | 2023 |
| G Force Crew Limited | Professional & scientific | 2014 |
| G Gabur Ltd | Construction | 2025 |
| G J Taylor & Company Limited | Construction | 2016 |
| G Jeyam Properties Ltd | Real estate | 2025 |
| G K Telecom Ltd | Administrative & support | 2009 |
| G M Innovate Limited | Professional & scientific | 2021 |
| G M Productions Ltd | Information & communication | 2019 |
| G N Sons Limited | Other services | 2013 |
| G P Clothing Ltd | Wholesale & retail | 2013 |