| Framework Training Ltd | Education | 2010 |
| France Carp Limited | Arts & recreation | 2002 |
| Francesco Gregorace Limited | Arts & recreation | 2003 |
| Francis & Francis (EOT) Limited | Financial services | 2025 |
| Francis & Francis Holdings Limited | Real estate | 2018 |
| Francis George Solicitor-Advocate Ltd | Professional & scientific | 2013 |
| Francis Mews (High Wycombe) Management Company Limited | Households | 2007 |
| Francisco Transport Ltd | Transport & logistics | 2024 |
| Franco Supersoft Ltd | Hospitality | 2023 |
| Franhil Developments Limited | Real estate | 2002 |
| Frank Fitness Limited | Arts & recreation | 2021 |
| Frank Mullane Ltd | Professional & scientific | 2019 |
| Franken Cleaning Ltd | Administrative & support | 2025 |
| Frankester Solutions Ltd | Extraterritorial | 2022 |
| Franklin Memorials Limited | Other services | 2016 |
| Frankly Recruitment Limited | Administrative & support | 2009 |
| Frantown Medic Services Ltd | Health & social care | 2018 |
| Fran’S NMP Company Ltd | Health & social care | 2025 |
| Fraser Ellis Limited | Professional & scientific | 2005 |
| Fraser Ellis Property Limited | Construction | 2014 |
| Fraser Smith Construction & Management Services Ltd | Professional & scientific | 2019 |
| Fratelis Limited | Hospitality | 2012 |
| Frazer SF Ltd | Information & communication | 2021 |
| Freak Vault Ltd | Wholesale & retail | 2023 |
| Freckles Farm Limited | Real estate | 2024 |
| Fred Baier Associates Limited | Arts & recreation | 2011 |
| Freedog Swindon Limited | Arts & recreation | 2018 |
| Freedom From Within Ltd | Health & social care | 2018 |
| Freelance IT (UK) Limited | Information & communication | 2003 |
| Freeport (Europe) Ltd | Manufacturing | 2019 |
| Freeth Fencing and Garden Services Ltd | Administrative & support | 2007 |
| Freetown Terminal Holding Limited | Financial services | 2010 |
| Frejonesy Limited | Health & social care | 2019 |
| French & Sons Property Limited | Real estate | 2019 |
| French Carriers Limited | Hospitality | 2008 |
| FRENCH7 Property Services Ltd | Real estate | 2025 |
| Fresh Air Content Ltd | Information & communication | 2024 |
| Fresh Barber Ltd | Other services | 2020 |
| Fresh Easy Eats Ltd | Hospitality | 2024 |
| Fresh Path Group Ltd | Information & communication | 2022 |
| Fresh Springs Care Limited | Administrative & support | 2023 |
| Fresh Thinking Warehouse Ltd | Construction | 2025 |
| Fresh Vending UK Ltd | Wholesale & retail | 2025 |
| Freshbrook Dental Practice Limited | Health & social care | 2008 |
| Freshbrook Plumbing and Heating Limited | Construction | 1982 |
| Freshlee Baked Ltd | Wholesale & retail | 2025 |
| Freza Accounting Limited | Professional & scientific | 2020 |
| FRFC1895 CIC | Arts & recreation | 2025 |
| Fridgeblokes Limited | Construction | 2016 |
| FRIEND4FRIEND Limited | Health & social care | 2009 |
| FRIEND4FRIEND Services Co Ltd | Health & social care | 2016 |
| Friendly Horizons Limited | Wholesale & retail | 2008 |
| Friends of HSJ Community Interest Company | Extraterritorial | 2020 |
| Friends of Vamizi Trust | Administrative & support | 2011 |
| Frika Limited | Information & communication | 2016 |
| Frillylily Limited | Wholesale & retail | 1994 |
| Frimz Cleaning Services Ltd | Administrative & support | 2026 |
| Frisk Broths Ltd | Hospitality | 2025 |
| Frobisher House RTM Company Ltd | Households | 2017 |
| Frocester Security Ltd | Administrative & support | 2017 |
| Front of House LS Limited | Arts & recreation | 2015 |
| Frontal Properties Ltd | Households | 2019 |
| Frontierx Ltd | Information & communication | 2021 |
| Frontline Academy of Knowledge Ltd | Professional & scientific | 2024 |
| Frost Equity Ltd | Real estate | 2022 |
| Fryern Dental Practice Limited | Health & social care | 2016 |
| FS1 LLP | | 2016 |
| FSK Solutions & Services Ltd | Construction | 2024 |
| FSL Capital Ltd | Financial services | 2025 |
| FSR Security Ltd | Administrative & support | 2021 |
| Fssp Persian Limited | Real estate | 2005 |
| FT Subago Limited | Construction | 2026 |
| FTK Music Ltd | Information & communication | 2025 |
| Ftmx Limited | Professional & scientific | 2010 |
| Fuelcards UK Limited | Professional & scientific | 2007 |
| Full Fresh Healthcare Ltd | Health & social care | 2025 |
| Fullbase Limited | Households | 1988 |
| Fuller Measure Limited | Wholesale & retail | 2023 |
| Fullfeel Limited | Professional & scientific | 2015 |
| FUN 76 Ltd | Construction | 2024 |
| FUN Forms Limited | Information & communication | 2023 |
| Fundamentally HR Limited | Administrative & support | 2014 |
| Funkykids Ltd | Manufacturing | 2024 |
| Funrise Limited | Education | 2008 |
| Funtails Limited | Wholesale & retail | 2024 |
| Furlong Trading Limited | Administrative & support | 2023 |
| Furniture & Things Ltd | Wholesale & retail | 2023 |
| Furocity Limited | Wholesale & retail | 2021 |
| Fusion Creative LAB Ltd | Other services | 2025 |
| Fusion Link Limited | Information & communication | 2019 |
| Fusion Media Software Solutions Ltd | Information & communication | 2006 |
| Fusion Vehicle Air Conditioning Ltd | Wholesale & retail | 2026 |
| Fuss Free Group Limited | Financial services | 2026 |
| Fuss Free Management Limited | Wholesale & retail | 2023 |
| Fuss Free Nutrition Limited | Wholesale & retail | 2026 |
| Futter & Frost Ltd | Hospitality | 2013 |
| Future Abroad Consultants Limited | Information & communication | 2011 |
| Future Balance Finance Ltd | Professional & scientific | 2018 |
| Future Balance Ltd | Professional & scientific | 2019 |
| Future Path Energy Ltd | Construction | 2025 |