| Fofana Ltd | Construction | 2025 |
| Foila Birmingham Limited | Water & waste | 2024 |
| Foila Group Limited | Financial services | 2024 |
| Foila Ipswich Limited | Water & waste | 2024 |
| Foila London Limited | Water & waste | 2024 |
| Foila Nottingham Limited | Water & waste | 2024 |
| Foila Teesside Limited | Water & waste | 2023 |
| Fokkens Property Group Limited | Financial services | 2026 |
| Folaplus Ltd | Health & social care | 2022 |
| Foley Solutions Ltd | Professional & scientific | 2024 |
| Folkestone Sports Centre Trust Limited | Arts & recreation | 1973 |
| Folly Fields Farm Ltd | Agriculture & fishing | 2020 |
| Fomatek Consulting Limited | Information & communication | 2017 |
| Food Creations Ltd | Manufacturing | 2021 |
| Food HOG Ltd | Hospitality | 2023 |
| Food Mill Ltd | Wholesale & retail | 2012 |
| Food Shelter Clothing Learn Ltd | Wholesale & retail | 2019 |
| Food Story International Ltd | Administrative & support | 2019 |
| Food Truckerz Ltd | Hospitality | 2026 |
| Food Unit Company Limited | Wholesale & retail | 2017 |
| Foodbusinesscompany Limited | Hospitality | 2019 |
| Foodfresh Ltd | Wholesale & retail | 2020 |
| Foodie Mama Ltd | Hospitality | 2021 |
| Foodie Mama Restaurant Ltd | Hospitality | 2024 |
| Foodvantage Limited | Hospitality | 2026 |
| Foord Consulting Services Ltd | Professional & scientific | 2025 |
| Footage Farm Ltd. | Administrative & support | 2001 |
| Football 2 Music Ltd | Education | 2020 |
| Football FUN Factory (Community 017) Limited | Arts & recreation | 2021 |
| Football Star Ltd | Arts & recreation | 2022 |
| Footprint Glass Lifting & Installations Ltd | Construction | 2015 |
| Footyfigurz Limited | Wholesale & retail | 2023 |
| FOR ALL Business Ltd | Information & communication | 2012 |
| FOR Profit Limited | Professional & scientific | 2013 |
| FOR YOU Electrical Services Ltd | Construction | 2014 |
| Forbes Property Lettings Ltd | Real estate | 2017 |
| Force 4 Growth Coaching & Consulting Ltd | Professional & scientific | 2025 |
| Ford Read Consultancy Ltd | Extraterritorial | 2021 |
| Foreign Exchange Limited | Professional & scientific | 2003 |
| Foreman & SON Ltd | Other services | 2015 |
| Forensic Support International Limited | Administrative & support | 2009 |
| Foresight Leadership Group United Kingdom Limited | Professional & scientific | 2020 |
| Forest Medical Reports Ltd | Financial services | 2022 |
| Forest Room Marston Moretaine Limited | Hospitality | 2021 |
| Forest Traffic Services Limited | Financial services | 2024 |
| Forestadent Limited | Wholesale & retail | 1978 |
| Foresters (New Bradwell) Management Company Limited | Households | 2025 |
| Forever Active Limited | Extraterritorial | 2001 |
| Forever Green Gardening Solutions Limited | Administrative & support | 2023 |
| Forex-Pt Ltd | Administrative & support | 2018 |
| Forge HR Consultancy Limited | Professional & scientific | 2017 |
| Forge Investments Limited | Real estate | 1999 |
| Forge Legacy Capital Limited | Financial services | 2026 |
| Forgewave Ltd | Wholesale & retail | 2024 |
| Forgeway Projects Ltd | Construction | 2026 |
| Forklift Licence Training Ltd | Transport & logistics | 2021 |
| Forma Design and Build Ltd | Construction | 2025 |
| Formaserve Systems Limited | Information & communication | 1990 |
| Format Graphics Limited | Manufacturing | 2012 |
| Formedge Limited | Real estate | 1995 |
| Formonix Sales Limited | Wholesale & retail | 2021 |
| Formsurf Ltd | Professional & scientific | 2023 |
| Formula Fast Limited | Arts & recreation | 2009 |
| Forq Ltd | Real estate | 2015 |
| Forrest & Stewart Limited | Professional & scientific | 2025 |
| Forrest Homes and Investments Ltd | Real estate | 2024 |
| Forrest Transport Group Ltd | Transport & logistics | 2025 |
| Forrest, Holmes & Hadlow Ltd | Transport & logistics | 2026 |
| Forseti Limited | Education | 2023 |
| Forshaw Tech Limited | Construction | 2023 |
| Forson & Associates Limited | Health & social care | 2022 |
| Forster Holdings Ltd | Financial services | 2025 |
| Forsyth MOT Solutions Ltd | Wholesale & retail | 2018 |
| Forsythe Estates Investment Ltd | Real estate | 2025 |
| Forte Investment Group UK Ltd | Information & communication | 2022 |
| Forte Walsham Limited | Information & communication | 2013 |
| Fortees Property Ltd | Real estate | 2020 |
| Fortfield Group Limited | Wholesale & retail | 2015 |
| Forth and Vale Limited | Manufacturing | 2025 |
| Forthright Consulting Limited | Professional & scientific | 2020 |
| Fortis Carpentry Ltd | Construction | 2025 |
| Fortis Green Development Limited | Construction | 2025 |
| Fortis Investment Group Ltd | Financial services | 2025 |
| Fortis Logistics Ltd | Transport & logistics | 2025 |
| Fortiter Limited | Information & communication | 2025 |
| Fortitude Solutions Limited | Real estate | 2013 |
| Fortius Industrial Company Ltd | Construction | 2020 |
| Fortna UK Limited | Professional & scientific | 1991 |
| Fortosh Flat Management Company Limited | Real estate | 1977 |
| Fortress Global Group Limited | Information & communication | 2007 |
| Fortuna Frutos (UK) Limited | Wholesale & retail | 1999 |
| Fortuna Labs Limited | Information & communication | 2025 |
| Fortune Focus Limited | Other services | 2023 |
| Fortune Publishing Limited | Information & communication | 1998 |
| Fortuno Packaging and Storage Ltd | Transport & logistics | 2024 |
| Fortware Limited | Professional & scientific | 2011 |
| Forty 1 Solutions Ltd | Information & communication | 2023 |
| Forty-Two Consulting Limited | Professional & scientific | 2014 |
| Fossil (UK) Global Services Ltd | Financial services | 2025 |
| Fossil (UK) Holdings Limited | Financial services | 2001 |