| Falling Leaves Band Ltd | Wholesale & retail | 2025 |
| Famel Global Limited | Wholesale & retail | 2025 |
| Family Harvest Ltd | Agriculture & fishing | 2025 |
| Family Maker Space Ltd | Wholesale & retail | 2025 |
| Fancyland Limited | Wholesale & retail | 2025 |
| Fanm Ltd | Wholesale & retail | 2025 |
| Fanosphere Ltd | Information & communication | 2026 |
| Fantastic-Ecom Ltd | Extraterritorial | 2022 |
| Fantasy Allstars CIC | Education | 2023 |
| FAR Green Properties Limited | Real estate | 2018 |
| Farag Dental Limited | Health & social care | 2024 |
| Farangserv Limited | Information & communication | 2023 |
| Faras Automobile Brands Ltd | Wholesale & retail | 2022 |
| Farbyte Ltd | Information & communication | 2012 |
| Fariax Digital Media Ltd | Wholesale & retail | 2025 |
| Farlo Technologies Ltd | Information & communication | 2025 |
| FASHIO24 Ltd | Wholesale & retail | 2026 |
| Fashionably Conscious CIC | Wholesale & retail | 2023 |
| Fast Forward Maths Ltd | Education | 2024 |
| Fast Lead Solutions Ltd | Manufacturing | 2023 |
| Fast Pick Store Limited | Arts & recreation | 2026 |
| Fast Reliable Printing Ltd | Manufacturing | 2025 |
| Fast UK Auto Ltd | Wholesale & retail | 2020 |
| Fastend Ltd | Information & communication | 2025 |
| Faster Marketing Ltd | Wholesale & retail | 2021 |
| Fatafati Sauce Co Ltd | Manufacturing | 2025 |
| Fatcon Digital Limited | Wholesale & retail | 2026 |
| Fatir Ltd | Wholesale & retail | 2025 |
| Faywell Group Ltd | Health & social care | 2025 |
| FC Global Limited | Wholesale & retail | 2026 |
| Febbis Limited | Professional & scientific | 2011 |
| February House Ltd | Information & communication | 2026 |
| Feed US UP CIC | Health & social care | 2025 |
| Feel Noor Group Ltd | Health & social care | 2025 |
| Feelgrowlive Ltd | Education | 2023 |
| Feeling Aphrodite Limited | Wholesale & retail | 2025 |
| Feifei Trading Ltd | Wholesale & retail | 2026 |
| Feivital Limited | Wholesale & retail | 2025 |
| Felac Ltd | Real estate | 2023 |
| Felix Group Contractors Limited | Extraterritorial | 2023 |
| Fenella Clothing Limited | Wholesale & retail | 2022 |
| Feng Rise Ltd | Wholesale & retail | 2025 |
| Fengrong Technology Co. Ltd | Wholesale & retail | 2026 |
| Fengsheng Culture Media Ltd | Wholesale & retail | 2026 |
| Fengshuianalyze Limited | Wholesale & retail | 2025 |
| Fetchsync Ltd | Information & communication | 2025 |
| FF Global Limited | Wholesale & retail | 2024 |
| Ffhawa Limited | Arts & recreation | 2026 |
| FG Advisory Ltd | Professional & scientific | 2012 |
| FHF Consultancy Ltd | Administrative & support | 2023 |
| Fielden Power Consultancy Ltd | Professional & scientific | 2023 |
| Fielden Property Ltd | Real estate | 2024 |
| Fifth Square Limited | Professional & scientific | 2013 |
| Figenblad Ltd | Information & communication | 2025 |
| Fight Gear Giveaways Limited | Wholesale & retail | 2025 |
| Figure Eight Aesthetics Ltd | Other services | 2022 |
| Fikoko Ltd | Professional & scientific | 2018 |
| Filament Consulting Ltd | Professional & scientific | 2024 |
| Fillyx Technology Ltd | Information & communication | 2025 |
| Fimilla Market Ltd | Wholesale & retail | 2026 |
| Finagoo Ltd | Financial services | 2016 |
| Finbridge Consulting Limited | Information & communication | 2025 |
| Find the Hidden Garden Ltd | Hospitality | 2023 |
| Find Your Mountain Ltd | Administrative & support | 2024 |
| Find Your Pick Limited | Wholesale & retail | 2020 |
| Findmorefashion Ltd | Wholesale & retail | 2025 |
| Fineo Properties Limited | Real estate | 2023 |
| Finji Ltd | Real estate | 2025 |
| Finmem Ltd | Information & communication | 2024 |
| Finsafe Ltd | Professional & scientific | 2025 |
| Fintegrate Consulting Ltd | Information & communication | 2026 |
| Fire Horse PA and Governance Services Ltd | Administrative & support | 2026 |
| Firefly Care Consultancy and Advice Services Ltd | Professional & scientific | 2024 |
| Firefly GX Ltd | Professional & scientific | 2026 |
| First Choice Work Recruitment Ltd | Administrative & support | 2026 |
| First Developments and Real Estate Limited | Real estate | 2024 |
| First FIX Formwork Limited | Manufacturing | 2023 |
| First Great National Limited | Wholesale & retail | 2012 |
| First Stop Windscreens Ltd | Wholesale & retail | 2025 |
| Firstday Automation Ltd | Professional & scientific | 2021 |
| Fish Recruitment SR Limited | Administrative & support | 2025 |
| Fisher Aylward Ltd | Professional & scientific | 2018 |
| Fit With SAM Tilley Limited | Other services | 2025 |
| Fitim Ltd | Wholesale & retail | 2025 |
| Fitra Flow Ltd | Wholesale & retail | 2023 |
| Fitya Initiative CIC | Education | 2024 |
| Fitzwilliam Shaw Associates Limited | Information & communication | 2025 |
| Fivestar Apps Ltd | Information & communication | 2012 |
| Fivestar Services London Ltd | Professional & scientific | 2010 |
| Fivethousand Homes Limited | Real estate | 2025 |
| Fixxa AI Ltd | Information & communication | 2025 |
| Flagship East Enterprise Ltd | Real estate | 2023 |
| Flamingo Retail Ltd | Wholesale & retail | 2018 |
| Flare Technologies Ltd | Professional & scientific | 2025 |
| Flareguard Ltd | Financial services | 2025 |
| Flash Your Things Ltd | Manufacturing | 2024 |
| Flava Global Direct Ltd | Wholesale & retail | 2020 |
| Fleet Flyer Ltd | Transport & logistics | 2025 |
| Fleur Lamont Ltd | Professional & scientific | 2024 |
| Fleurs on Sunday Ltd | Arts & recreation | 2024 |