| Frances Clarabella Ltd | Administrative & support | 2014 |
| Francis Project Harrow Ltd | Real estate | 2019 |
| Francis Road Project UK Ltd | Real estate | 2018 |
| Francoise Fourcade Limited | Information & communication | 2017 |
| Frank Brickwork Ltd | Construction | 2022 |
| Frank Productions Limited | Administrative & support | 2017 |
| Frank Truman Limited | Financial services | 1970 |
| Frankie Communications Ltd | Professional & scientific | 2020 |
| Frankies Barber Ltd | Other services | 2014 |
| Franklin Developments Limited | Construction | 2011 |
| Franklin Galley Property Limited | Construction | 2015 |
| Frankton Rail Limited | Administrative & support | 2012 |
| Frantec Automotive Ltd | Extraterritorial | 2025 |
| Fraser Automotives Ltd | Wholesale & retail | 2019 |
| Frasers Fiscal Solutions Limited | Professional & scientific | 1997 |
| Frasers Holdco Limited | Financial services | 2024 |
| Frasers Young (LDN) Ltd | Professional & scientific | 2017 |
| Frasers Young Inc Ltd | Professional & scientific | 2025 |
| Frasers Young Limited | Professional & scientific | 2009 |
| Frasers-Ca Ltd | Professional & scientific | 2025 |
| Fratres Security Limited | Administrative & support | 2015 |
| Fratton Road Development Limited | Construction | 2014 |
| Frauxe Ltd | Wholesale & retail | 2026 |
| Fravn Ltd | Manufacturing | 2025 |
| Fray's Court Limited | Real estate | 2023 |
| Frcgb Limited | Hospitality | 2009 |
| Frederick George Mileham Limited | Construction | 2020 |
| Frederick Reed Limited | Real estate | 1966 |
| Free Renegade Film Technology Ltd | Professional & scientific | 2022 |
| Freedo Limited | Administrative & support | 2015 |
| Freedom One Yachting Ltd | Administrative & support | 2023 |
| Freedom Pictures Limited | Information & communication | 1993 |
| Freehold Properties Limited | Real estate | 2022 |
| Freelogix Limited | Wholesale & retail | 2006 |
| Freeman and Daniels Ltd | Other services | 2012 |
| Freeman Industries Limited | Arts & recreation | 2016 |
| Freemaths Ltd | Education | 2018 |
| Freereach Limited | Wholesale & retail | 2025 |
| Freesia Investments Ltd | Administrative & support | 2020 |
| Freethought International Limited | Information & communication | 2013 |
| Freeway Homes Limited | Real estate | 2005 |
| Freewell Associates Ltd | Professional & scientific | 2014 |
| Freezee Industrial Products Ltd | Manufacturing | 2023 |
| Fremi Creation Ltd | Wholesale & retail | 2025 |
| French Dent Ltd | Health & social care | 2023 |
| Frenchco Holdings Limited | Financial services | 2019 |
| Frencheye White City Ltd | Wholesale & retail | 2017 |
| Frendz Mart Ltd | Wholesale & retail | 2025 |
| Frequencity Global Ltd | Information & communication | 2024 |
| Fresh & Fresh London Ltd | Wholesale & retail | 2013 |
| Fresh Aesthetics (Kent) Ltd | Health & social care | 2019 |
| Fresh Cutz Barbers Limited | Other services | 2023 |
| Fresh Facilities Ltd | Hospitality | 2023 |
| Fresh Fusion Fruits and Juices Limited | Wholesale & retail | 2025 |
| Fresh Networks Services (UK) Limited | Information & communication | 2024 |
| Fresh Ocean UK Limited | Hospitality | 2017 |
| Fresh Organic London Ltd | Construction | 2019 |
| Fresh Protein Fuel Ltd | Hospitality | 2025 |
| Fresh Retreat Limited | Other services | 2023 |
| Fresh STORE1 Ltd | Wholesale & retail | 2025 |
| Fresh Teched Limited | Information & communication | 2022 |
| Fresha Food Ltd | Wholesale & retail | 2017 |
| Freshasset Limited | Households | 1991 |
| Freshcrispy Ltd | Hospitality | 2026 |
| Freshford Cottage Nursing Home Limited | Health & social care | 2017 |
| Freshly Cubed Ltd | Wholesale & retail | 2026 |
| Freshmead Ltd | Hospitality | 2023 |
| Freshsquare Limited | Extraterritorial | 2004 |
| Freshway Courier Ltd | Transport & logistics | 2023 |
| Frewin Court Limited | Households | 1988 |
| Freya Studio Ltd | Other services | 2024 |
| Freyr Restaurant Limited | Hospitality | 2017 |
| Frickers Flowers Ltd | Wholesale & retail | 2025 |
| Friedland Trading Limited | Financial services | 2025 |
| Friends Film Productions Ltd | Information & communication | 2023 |
| Friends of Madhya Pradesh UK Ltd | Other services | 2025 |
| Frilly & Fluffy Limited | Wholesale & retail | 2016 |
| Fringe Management Limited | Arts & recreation | 2017 |
| Frission Limited | Real estate | 2024 |
| Frith Road Ltd | Real estate | 2019 |
| Frithwood Court Management Company Limited | Real estate | 1981 |
| Frithwood Surveying Limited | Real estate | 2016 |
| Frmc Limited | Professional & scientific | 2011 |
| Frodo Ventures Limited | Wholesale & retail | 2024 |
| Frog in a PAN Limited | Education | 2010 |
| From the Silver Screen Limited | Wholesale & retail | 2021 |
| Frome Court Northwood Right to Manage Company Limited | Households | 2012 |
| Front Room Coffee Limited | Hospitality | 2026 |
| Frontera Properties Limited | Real estate | 2021 |
| Frontier R&D Limited | Professional & scientific | 2024 |
| Frontiers Academy Ltd | Hospitality | 2024 |
| Frontline First | Health & social care | 2016 |
| Frontline Magic Limited | Information & communication | 2015 |
| Frost Line Refrigeration Ltd | Construction | 2019 |
| Froz'N-Ice Limited | Other services | 2016 |
| FRS Property Services Ltd | Construction | 2025 |
| Fruicion Ltd | Manufacturing | 2020 |
| Fruitcake Patisseries Limited | Manufacturing | 1994 |
| Frunza Ltd | Wholesale & retail | 2024 |
| Frux Optima Limited | Administrative & support | 2016 |