| Ferndale Legal Services Limited | Professional & scientific | 2005 |
| Ferndale Living Limited | Wholesale & retail | 2025 |
| Fersc Limited | Agriculture & fishing | 2024 |
| Feteade Property Limited | Real estate | 2020 |
| Ffifl Limited | Administrative & support | 2007 |
| Field Rogers Limited | Professional & scientific | 2020 |
| Filan Accountants Limited | Professional & scientific | 2015 |
| Fina Furniture Limited | Manufacturing | 2022 |
| Finlows Limited | Construction | 2017 |
| Fintech 100 Limited | Administrative & support | 2014 |
| Fire & Ice Professional Catering Equipment Limited | Wholesale & retail | 2015 |
| Firefighter Coffee Ltd | Wholesale & retail | 2025 |
| Firewood Pictures Ltd. | Information & communication | 2016 |
| First Base Solutions Ltd | Wholesale & retail | 2003 |
| First Choice Engineering Limited | Construction | 2014 |
| First Hand Services Limited | Wholesale & retail | 2014 |
| First Party Limited | Professional & scientific | 2013 |
| Fisher and Co Developments Ltd | Real estate | 2025 |
| Fisher Landscapes Limited | Administrative & support | 2015 |
| FIT2COMMUNICATE Limited | Professional & scientific | 2018 |
| Fitchford Finance Limited | Professional & scientific | 2025 |
| Fitzgerald Educational Consultancy Limited | Education | 2023 |
| Five Star Systems Limited | Information & communication | 2025 |
| FKP Investment Limited | Real estate | 2023 |
| Flame Red Communications Limited | Professional & scientific | 2016 |
| Flandria Property Limited | Real estate | 2020 |
| Flintfox Europe Limited | Information & communication | 2015 |
| Florentine Investments Ltd | Real estate | 2011 |
| Flourish at the Farm Limited | Education | 2019 |
| Flow Development Limited | Education | 2016 |
| Fltr UK Ltd | Hospitality | 2024 |
| Fludium Limited | Professional & scientific | 2021 |
| Fluxma Limited | Professional & scientific | 2025 |
| FLY Harrier Limited | Arts & recreation | 2014 |
| FM Technologies Limited | Information & communication | 2017 |
| FMC UK Construction Service Ltd | Financial services | 2024 |
| FMP Medical Consulting Limited | Administrative & support | 2012 |
| Folium Ltd | Construction | 2016 |
| Follander Limited | Wholesale & retail | 2023 |
| Foocole Ltd | Wholesale & retail | 2008 |
| Food Champs 2020 Ltd | Hospitality | 2018 |
| Food Champs Group Ltd | Hospitality | 2024 |
| Foot Comfort Shoes Limited | Wholesale & retail | 2023 |
| FOR Something Different Limited | Wholesale & retail | 2019 |
| Ford Consultancy Limited | Professional & scientific | 2025 |
| Foreland Enterprises Limited | Construction | 2022 |
| Forrest Marina Management Ltd | Other services | 2026 |
| Forseti Interim Limited | Professional & scientific | 2017 |
| Fortress Industries Limited | Professional & scientific | 2026 |
| Forwardspan Property Management Limited | Extraterritorial | 1990 |
| FOS Brand Management Limited | Extraterritorial | 2009 |
| Fosseway Trading Limited | Wholesale & retail | 2006 |
| Fosters Enterprise Ltd | Real estate | 2025 |
| Four Counties Pool Care Limited | Administrative & support | 2008 |
| Four Leaf Clover Foods Limited | Manufacturing | 2013 |
| Four Points Consultancy Ltd | Professional & scientific | 2026 |
| Four Seasons PHO Limited | Hospitality | 2021 |
| Fourth Realm Limited | Financial services | 2018 |
| FOX Blue Pubs Limited | Hospitality | 2025 |
| Foxes Lane Management Company Ltd | Administrative & support | 2014 |
| Foxplas Ltd | Professional & scientific | 2025 |
| Foxwood Flat Management Limited | Real estate | 1995 |
| FOY Wealth Ltd | Administrative & support | 2009 |
| Fraction Flow Ltd | Professional & scientific | 2025 |
| Freckle Fundraising Limited | Administrative & support | 2020 |
| Fred Hart Agricultural Services Ltd | Manufacturing | 2010 |
| Freedom Serviced Accommodation Limited | Hospitality | 2021 |
| Fresh Baguette Bar Ltd | Hospitality | 2025 |
| Fresh Fire Media Ltd | Wholesale & retail | 2004 |
| Freudenberger UK Limited | Wholesale & retail | 2021 |
| Froggle Parties EL Ltd | Arts & recreation | 2020 |
| Frost Research Ltd | Professional & scientific | 2003 |
| Fruition Accountancy Limited | Professional & scientific | 2009 |
| Fruition Accountants Limited | Professional & scientific | 2020 |
| Fruition Advisory LLP | | 2010 |
| Fruition Audit Limited | Professional & scientific | 2020 |
| Fryer Mayfield Civil Engineering Ltd | Construction | 2025 |
| FS Independent Trustee Limited | Professional & scientific | 2020 |
| Fuel for Performance Ltd | Health & social care | 2025 |
| Fuel Healthspan Ltd | Wholesale & retail | 2024 |
| Fulbrook Properties Ltd | Construction | 2020 |
| Fulcrum Ctrm Limited | Professional & scientific | 2026 |
| Fusing Energy Limited | Extraterritorial | 2011 |
| Fusion Clan Food Ltd | Hospitality | 2025 |
| Fusiontek Limited | Construction | 2023 |
| Future INK Limited | Education | 2011 |
| Future Parking Limited | Real estate | 2017 |
| Future Vent Limited | Construction | 2022 |
| FWC Advisory Ltd | Professional & scientific | 2023 |
| FX Dynamics Ltd | Manufacturing | 2010 |
| G Investco Ltd | Financial services | 2020 |
| G M James Limited | Other services | 2006 |
| G M Wyatt Holdings Limited | Construction | 1973 |
| G Wright Homes Limited | Real estate | 2025 |
| G-Motive Limited | Professional & scientific | 2019 |
| G.M Wyatt Investments Limited | Construction | 1982 |
| G3WORX Ltd | Wholesale & retail | 2025 |
| GAB Associates Limited | Professional & scientific | 2023 |
| GAD Gully Ltd | Financial services | 2024 |
| Gaincope Limited | Administrative & support | 2022 |