| Fastlane Living Ltd | Wholesale & retail | 2025 |
| Fastlane Productions Limited | Real estate | 1994 |
| Faulknerpropertyholdings Ltd | Real estate | 2025 |
| Fawcett PCS Ltd | Education | 2025 |
| Fawkes Limited | Professional & scientific | 2019 |
| FBX Capital Partners Limited | Financial services | 2021 |
| FC Hardware Limited | Wholesale & retail | 2009 |
| FC Sessions Ltd | Education | 2025 |
| FCE Munro Limited | Manufacturing | 2015 |
| FD Analytical Ltd | Professional & scientific | 2008 |
| FDA Commercial Properties Ltd | Real estate | 2025 |
| FDA Holdings Ltd | Professional & scientific | 2020 |
| FDA Properties 1 Ltd | Real estate | 2024 |
| FDA Property Ltd | Real estate | 2024 |
| Fdkp Ltd | Wholesale & retail | 2024 |
| Feastham Great Pizza Ltd | Hospitality | 2025 |
| Feastham Nice Food Ltd | Hospitality | 2023 |
| Feed OUR Communities CIC | Real estate | 2018 |
| Feedwater Limited | Manufacturing | 1976 |
| Felinefine Limited | Hospitality | 2002 |
| Fellows Podiatry Ltd | Health & social care | 2022 |
| Fellside Braithwaite Ltd | Hospitality | 2025 |
| Felts Event Services Ltd | Administrative & support | 2019 |
| FEM Invest Ltd | Real estate | 2021 |
| Fender Farm Management Company Limited | Households | 2002 |
| Fenestration Solutions Limited | Manufacturing | 2025 |
| Fenton's Insulation Company Ltd | Construction | 2017 |
| Ferguson Site Services Ltd | Construction | 2026 |
| Fergusons Freight Ltd | Transport & logistics | 2023 |
| Fergusson Electrical Contractors Ltd | Administrative & support | 2017 |
| Fernwood Wirral RTM Company Limited | Households | 2014 |
| Ferry Pizzaria Ltd | Hospitality | 2026 |
| Fibratex UK Ltd | Administrative & support | 2019 |
| Fibrepro Advisory Ltd | Professional & scientific | 2025 |
| Fiducia FD Ltd | Administrative & support | 2026 |
| Fieldcrest Ltd | Administrative & support | 2009 |
| Fieldhouse Surveys Ltd | Professional & scientific | 2009 |
| Fieldlease Property Management Limited | Households | 1990 |
| Fife PI 2 Limited | Extraterritorial | 2025 |
| Fife PI Limited | Professional & scientific | 2025 |
| FIG and Olive Assets Limited | Real estate | 2021 |
| Figos Kitchen Ltd | Hospitality | 2025 |
| Fika Property Ltd | Real estate | 2022 |
| Fill ME UP Phils Ltd | Hospitality | 2025 |
| Filling Station Facilities Ltd | Arts & recreation | 2009 |
| Filspire Ltd | Information & communication | 2025 |
| FILTERS4TAPS Ltd | Manufacturing | 2025 |
| Finabeo Limited | Information & communication | 2024 |
| Finance Renewals Ltd | Professional & scientific | 2013 |
| Fine Fruits of Pensby Limited | Wholesale & retail | 2007 |
| Finerose Properties Limited | Real estate | 1999 |
| Finest Christmas Trees Ltd | Agriculture & fishing | 2016 |
| Finkle Street Management Co Limited | Households | 2007 |
| Finlayson Psychological Services Limited | Health & social care | 2021 |
| Finli (FLP) Holdings Ltd | Financial services | 2020 |
| Finn Global Limited | Extraterritorial | 2019 |
| Finn Group Ltd | Information & communication | 2017 |
| Finn International Limited | Manufacturing | 2019 |
| Finsols Holdings Limited | Administrative & support | 2019 |
| Fintra Intelligence Ltd | Information & communication | 2026 |
| FIR Tree Ambleside Management Company Limited | Real estate | 2012 |
| Fire Energy Limited | Professional & scientific | 2019 |
| Fire Industry Research Establishment Limited | Professional & scientific | 2023 |
| Firecode Solutions Ltd | Information & communication | 2024 |
| Fired UP Heating Solutions Limited | Construction | 2020 |
| Firefly Strategic Services Limited | Professional & scientific | 2025 |
| Fireside by Design Online Limited | Wholesale & retail | 2022 |
| Firma Sports Agency Limited | Arts & recreation | 2015 |
| First AID Training Wirral Ltd | Health & social care | 2026 |
| First Alpha Services Ltd | Professional & scientific | 2020 |
| First Choice Catering Equipment Limited | Wholesale & retail | 2013 |
| First Division Medical Services Ltd | Health & social care | 2015 |
| First Footers Dance Ltd | Education | 2013 |
| First Gymnastics South Manchester Limited | Arts & recreation | 2024 |
| First Response Solutions Ltd | Professional & scientific | 2025 |
| Firstfoot Developments Limited | Real estate | 2020 |
| Firstrad Ltd | Health & social care | 2024 |
| Fisher Formula Properties Limited | Real estate | 2025 |
| Fisher North Ltd | Real estate | 2026 |
| Fitpro Sales Sprint Ltd | Administrative & support | 2020 |
| Fitstreak Ltd | Manufacturing | 2025 |
| Fitz Estates Limited | Transport & logistics | 2024 |
| Fiveholds Ltd | Wholesale & retail | 2025 |
| FJ Leafleting Ltd | Other services | 2015 |
| FKD Engineering Limited | Professional & scientific | 2017 |
| Flair Cookery Ltd | Hospitality | 2025 |
| Flame Padel Ltd | Manufacturing | 2026 |
| Flame Promotions Limited | Wholesale & retail | 2021 |
| Flaming Showgirls Ltd | Arts & recreation | 2026 |
| Flamingo Capital Trading Ltd | Wholesale & retail | 2024 |
| Flamingo UK Consultancy Limited | Professional & scientific | 2017 |
| Flavour Explosion Limited | Manufacturing | 2000 |
| Fleetsolve Limited | Energy | 2002 |
| Fleming & Hadden Limited | Other services | 1959 |
| Fleming Holdings Limited | Financial services | 2024 |
| Fleming Surgical Ltd | Health & social care | 2024 |
| Flensburg Development Company Limited | Construction | 2004 |
| Fleuriolie Ltd | Wholesale & retail | 2024 |
| Flexible Packing Services Limited | Manufacturing | 2005 |
| Flexicon UK Limited | Manufacturing | 2008 |