| Flwrwine Media Limited | Information & communication | 2025 |
| FLY International Co., Ltd | Extraterritorial | 2014 |
| Flydragon Tech Ltd | Wholesale & retail | 2025 |
| Flydragon Travel Hub Ltd | Administrative & support | 2018 |
| Flyed IED Trading Limited | Wholesale & retail | 2025 |
| Flyenjoy Ltd | Wholesale & retail | 2025 |
| Flyfair Training Ltd | Professional & scientific | 2024 |
| Flyhigh Web Solutions Ltd | Information & communication | 2025 |
| Flying Cat Network Ltd | Information & communication | 2024 |
| Flynex YY Ltd | Wholesale & retail | 2025 |
| FM House Ltd | Wholesale & retail | 2022 |
| FM Sport Limited | Manufacturing | 2017 |
| FMH Properties Limited | Real estate | 2023 |
| FMS (Hereford) Limited | Professional & scientific | 2017 |
| Focuse Ltd | Information & communication | 2024 |
| Foliaura Ltd | Wholesale & retail | 2025 |
| Follicle Factory Limited | Wholesale & retail | 2024 |
| Fontaineshop Ltd | Wholesale & retail | 2026 |
| Fonte Creative Studio Ltd | Professional & scientific | 2025 |
| Food & Beverage Associates Ltd | Professional & scientific | 2016 |
| Foodie Visitor Ltd | Wholesale & retail | 2025 |
| Foodyvan Machinery Co., Ltd | Manufacturing | 2023 |
| Football Fusion International Limited | Arts & recreation | 2018 |
| FOR YOU Group Holding Limited | Financial services | 2025 |
| Fore Season Ltd | Wholesale & retail | 2023 |
| Foreign Language Translation Ltd | Professional & scientific | 2023 |
| Forensic About Business Outsourced Solutions Ltd | Administrative & support | 2022 |
| Forensic About Business Solutions Ltd | Professional & scientific | 2019 |
| Foresight Global Investment Limited | Real estate | 2021 |
| Forest Fresh Mushrooms Ltd | Agriculture & fishing | 2023 |
| Forestc Ltd | Wholesale & retail | 2025 |
| Foreverblush Limited | Manufacturing | 2020 |
| Forface Ltd | Extraterritorial | 2025 |
| Forge 90 Ltd | Wholesale & retail | 2026 |
| Forge FBA Ltd | Wholesale & retail | 2023 |
| Forged Apparel Ltd | Wholesale & retail | 2025 |
| Forgeway Kitchens Ltd | Construction | 2026 |
| Forher Everyday Group Ltd | Wholesale & retail | 2026 |
| Fork Spoon and Roll Ltd | Hospitality | 2024 |
| Formelyx Site Fixes Ltd | Information & communication | 2026 |
| Formtec International Trade Co., Limited | Extraterritorial | 2005 |
| Formula Ltd | Information & communication | 2025 |
| Formyxel Response Logic Ltd | Information & communication | 2026 |
| Fortia Angular Limited | Administrative & support | 2020 |
| Fortian Ltd | Information & communication | 2025 |
| Fortis Property Partners Ltd | Real estate | 2025 |
| Fortom Limited | Information & communication | 2019 |
| Fortress Watch Company Limited | Wholesale & retail | 2024 |
| Fortune Cat Electronics Co., Ltd | Wholesale & retail | 2025 |
| Fortune Vanguard Tech Limited | Wholesale & retail | 2025 |
| Fortuneh Ltd | Wholesale & retail | 2025 |
| Fortunelink International Trading Limited | Administrative & support | 2024 |
| Foru Education Ltd | Administrative & support | 2023 |
| Forwardx Ltd | Professional & scientific | 2023 |
| Foshan Guosi Building Materials Co., Ltd | Wholesale & retail | 2022 |
| Foteng International Limited | Extraterritorial | 2016 |
| Foufou Ltd | Extraterritorial | 2020 |
| Foundry Equipment and Supplies Association Limited | Other services | 1925 |
| Foundry Trade Journal Ltd | Information & communication | 2014 |
| Four Seasons Orchid Limited | Wholesale & retail | 2025 |
| FOUR9'S SDR Limited | Wholesale & retail | 2025 |
| Fourwinds Photography Services Ltd | Information & communication | 2017 |
| Fouzia and Co Ltd | Health & social care | 2023 |
| Foxdales Consulting Ltd | Professional & scientific | 2020 |
| Foxikira Ltd | Information & communication | 2023 |
| Foxy Boxes Ltd | Arts & recreation | 2021 |
| Foxy Lady NO1 Ltd | Information & communication | 2025 |
| FPC Group Ltd | Professional & scientific | 2020 |
| FPF Business Limited | Wholesale & retail | 2026 |
| Fpugbox Link Word Ltd | Information & communication | 2024 |
| Fqpromise Ltd | Wholesale & retail | 2025 |
| Fractal Biogas Ltd | Professional & scientific | 2026 |
| Fractional Accountants Ltd | Professional & scientific | 2025 |
| Frageo Red Ltd | Information & communication | 2025 |
| Fraiya Ltd | Health & social care | 2023 |
| Framesluxx Ltd | Wholesale & retail | 2023 |
| Frametrunk Services Ltd | Information & communication | 2020 |
| Framory Ltd | Wholesale & retail | 2025 |
| France Audou Trading Co., Ltd | Wholesale & retail | 2024 |
| France Coolpad Food Co., Ltd | Manufacturing | 2023 |
| France Haoxiansen Food Co., Ltd | Wholesale & retail | 2024 |
| France Yisen Trading Co., Ltd | Wholesale & retail | 2024 |
| Francesca Braham Family Law Limited | Professional & scientific | 2020 |
| Franche Business Ltd | Wholesale & retail | 2026 |
| Francisca Victoria Limited | Wholesale & retail | 2025 |
| Frankie's Therapy Limited | Health & social care | 2025 |
| Franklin Josetroit Ltd | Wholesale & retail | 2025 |
| Franklin Ross Properties Ltd | Households | 2025 |
| Franks Capital Ltd | Real estate | 2025 |
| Fred Husbyaune Limited | Extraterritorial | 2024 |
| Free Cakes for Kids Limited | Other services | 2015 |
| Free Dreamland Ltd | Wholesale & retail | 2026 |
| Freedawn Ltd | Wholesale & retail | 2024 |
| Freedom Bury ST Edmunds CIC | Health & social care | 2021 |
| Freedom for ALL Group Ltd | Administrative & support | 2026 |
| Freeflow Ltd | Wholesale & retail | 2025 |
| Freelater Ltd | Information & communication | 2026 |
| Freeman Bookkeeping & Accounts Ltd | Professional & scientific | 2013 |
| Freemont Estates Limited | Real estate | 2026 |
| Freepoet Ltd | Wholesale & retail | 2025 |