| Forest Local Ltd | Wholesale & retail | 2025 |
| Foreverbargain Ltd | Wholesale & retail | 2026 |
| Formcraft Limited | Real estate | 2009 |
| Forme Fitness Ltd | Wholesale & retail | 2023 |
| Former Chocolate Factory RMC Limited | Households | 2026 |
| Formexia Limited | Professional & scientific | 2013 |
| Formidable Fencing Limited | Construction | 2025 |
| Forno Fresh Pizza Limited | Hospitality | 2021 |
| Fortar Limited | Professional & scientific | 2013 |
| Fortland Investment Limited | Real estate | 2021 |
| Fortland Realty Ltd | Real estate | 2023 |
| Fortland Sussex Ltd | Real estate | 2023 |
| Fortunate Homes Limited | Real estate | 2022 |
| Fortune Clothing Limited | Wholesale & retail | 2013 |
| Forty SIX Sutherland Avenue Management Limited | Households | 1986 |
| Foulds Ingham Associates Limited | Professional & scientific | 1978 |
| Fountain Care Limited | Health & social care | 2009 |
| Fountaingrove Estates Limited | Real estate | 1999 |
| Four Forty Nine Ltd | Real estate | 2020 |
| Fourays Ltd | Real estate | 2019 |
| FOX Internet Limited | Information & communication | 2018 |
| FOX Maintenance Construction Ltd | Construction | 2023 |
| Foxhound Technology Solutions Limited | Extraterritorial | 2014 |
| Foxton Properties Limited | Real estate | 2023 |
| Fragrance & Fabric Bazar Ltd | Wholesale & retail | 2025 |
| Framberg Limited | Professional & scientific | 2004 |
| Framelight UK Ltd | Information & communication | 2013 |
| Frandovi Construction Ltd | Professional & scientific | 2015 |
| Frandovi Holdings Ltd | Real estate | 2025 |
| Frank Whyte Sports Management Ltd. | Other services | 2019 |
| Frankosher - UK Ltd | Other services | 2024 |
| Franmere Limited | Professional & scientific | 2025 |
| Freedom Holding Group Ltd | Professional & scientific | 2026 |
| Freedom Path Financial Planning Limited | Financial services | 2024 |
| Freeholders Funds Limited | Professional & scientific | 2013 |
| Freigro Investments Ltd | Construction | 2020 |
| Fresh and Clean Solutions Ltd | Administrative & support | 2024 |
| Fresh Bubbles Hammersmith Ltd | Hospitality | 2022 |
| Fresh Choice International Limited | Wholesale & retail | 2016 |
| Fresh Cool Ltd | Manufacturing | 2015 |
| Fresh Food Enterprises Limited | Administrative & support | 2015 |
| Fresh Foods Cafes Ltd | Hospitality | 2017 |
| Fresh VEG Supply Limited | Wholesale & retail | 2019 |
| Freva Holding Ltd | Professional & scientific | 2024 |
| Frid&Mo Limited | Health & social care | 2019 |
| Friday Court Management Company Limited | Administrative & support | 1988 |
| Fried Chicken City Ltd | Hospitality | 2023 |
| Friedchickenhw Ltd | Hospitality | 2026 |
| Friendly Property Investments Limited | Real estate | 2021 |
| Frobisher Investments Limited | Financial services | 2019 |
| Frock ME! Limited | Wholesale & retail | 2008 |
| Fromay Limited | Professional & scientific | 2004 |
| Front Point Accounting Solutions Ltd | Professional & scientific | 2024 |
| Fruity Fresh Limited | Professional & scientific | 1992 |
| FS Drywall Ltd | Construction | 2025 |
| Fspm Construction Ltd | Construction | 2015 |
| FU SHENG168 Ltd | Hospitality | 2024 |
| Fuchs Wood Ltd | Manufacturing | 2024 |
| Fuel 4 U Ltd | Wholesale & retail | 2013 |
| Fueler Consulting Ltd | Administrative & support | 2025 |
| Fuge Design Services Limited | Professional & scientific | 2016 |
| Fuji Maintenance Solutions Ltd | Construction | 2025 |
| Full Fresh Ltd | Extraterritorial | 2014 |
| Fully Involved Limited | Real estate | 1999 |
| Fully Networking (UK) Ltd | Information & communication | 2022 |
| Fumigo Limited | Professional & scientific | 2023 |
| Funcell Games UK Ltd | Information & communication | 2024 |
| Functional Furniture Limited | Other services | 1998 |
| Funky Scissors Limited | Other services | 2018 |
| Funnel Foundry SEO Limited | Information & communication | 2025 |
| Furniplus Ltd | Other services | 2021 |
| Fusion Hospitality Limited | Hospitality | 2013 |
| Fusion Rental LLP | | 2024 |
| Future Hub Centre Ltd | Hospitality | 2023 |
| Future Style Perfumes UK Limited | Wholesale & retail | 2026 |
| Futuretick Limited | Information & communication | 2023 |
| Fuudies Ltd | Other services | 2019 |
| FWV Ltd | Arts & recreation | 2015 |
| G a Plumbing & Renovation Services Ltd | Construction | 2022 |
| G and N Interiors Limited | Wholesale & retail | 2010 |
| G C FOX Limited | Other services | 2018 |
| G C Properties (Warley) Limited | Real estate | 2022 |
| G D Construction Ltd | Construction | 2015 |
| G D Jewellery Limited | Wholesale & retail | 2014 |
| G Delvila Ltd | Information & communication | 2023 |
| G E Surdoiu Ltd | Construction | 2019 |
| G J Builders Limited | Construction | 2008 |
| G K T Construction Limited | Construction | 2006 |
| G Keys Ltd | Administrative & support | 2022 |
| G M Impex Limited | Wholesale & retail | 1992 |
| G Mummery Roofing Limited | Construction | 2017 |
| G R IT Solutions Limited | Information & communication | 2017 |
| G Unit Autocare Ltd | Administrative & support | 2024 |
| G&A Gold Ltd | Construction | 2020 |
| G&B Properties (Laindon) Limited | Real estate | 2021 |
| G&G Construct Limited | Construction | 2019 |
| G&G R Ltd | Construction | 2015 |
| G&S Builders London Ltd | Construction | 2025 |
| G&S Diamonds Limited | Wholesale & retail | 2019 |
| G&Sb Business Ltd | Transport & logistics | 2025 |