| Fenix Bridge Holdings Limited | Financial services | 2025 |
| Fenix Bridge Investments Ltd | Financial services | 2024 |
| Fergus Property Limited | Real estate | 2024 |
| Fernheath Consulting Limited | Information & communication | 2018 |
| Ferrari Owners' Club (Holdings) Limited | Other services | 1967 |
| Fetch ME a Drink Ltd | Manufacturing | 2025 |
| FEY Capital Holding UK Ltd | Financial services | 2020 |
| FEY Holding UK Ltd | Financial services | 2019 |
| FEY Motors Ltd | Other services | 2023 |
| Final State Ltd | Information & communication | 2026 |
| Finance British Business Ltd | Extraterritorial | 2021 |
| Find ME a Surveyor Limited | Professional & scientific | 2023 |
| Fireact Ltd | Wholesale & retail | 2019 |
| Fired UP Talent Limited | Professional & scientific | 2014 |
| Fireworks Enterprises Limited | Professional & scientific | 2024 |
| Fireworks Group Ltd | Wholesale & retail | 2023 |
| Firm Academy Limited | Professional & scientific | 1995 |
| First Call Crew Ltd | Arts & recreation | 2017 |
| First Fifteen Limited | Financial services | 2020 |
| First Funded UK Ltd | Professional & scientific | 2019 |
| First-Case (UK Operations) Limited | Professional & scientific | 2019 |
| First-Case Ltd | Information & communication | 2020 |
| Fishing on Line Limited | Wholesale & retail | 1999 |
| Fitr Nation Limited | Arts & recreation | 2023 |
| Fitzmorris Consulting Ltd. | Professional & scientific | 2011 |
| Flame Hair Studios Ltd | Other services | 2018 |
| Flanagan Commercial Properties Ltd | Other services | 2022 |
| Flat White Speciality Coffee Ltd | Other services | 2019 |
| Flatfootsams Limited | Professional & scientific | 2007 |
| Flatley Heating Ltd | Construction | 2013 |
| FLO & Co Food Ltd | Hospitality | 2020 |
| Flomingo Ltd | Financial services | 2025 |
| Floodlets Ltd | Real estate | 2025 |
| Flowers by Jill Ltd | Wholesale & retail | 2025 |
| Fluids in Motorsport Ltd | Wholesale & retail | 2007 |
| Flying V Limited | Professional & scientific | 2018 |
| Fmegroup Ltd | Construction | 2024 |
| Fnpr Properties Ltd | Real estate | 2024 |
| Focus Marketing Ltd | Information & communication | 2012 |
| Fontwell IT Solutions Ltd | Information & communication | 2023 |
| FOR Great Events Limited | Professional & scientific | 2026 |
| Forefront Engineering Ltd | Professional & scientific | 2023 |
| Forenpsych Services Limited | Health & social care | 2011 |
| Forthprice Limited | Construction | 1980 |
| Fortis Education Limited | Other services | 2023 |
| Fortis Performance Centre Limited | Wholesale & retail | 2025 |
| Fortis Racing Limited | Wholesale & retail | 2008 |
| Fostering Connectivity Sales Ltd | Professional & scientific | 2024 |
| Foundry Consulting Limited | Professional & scientific | 2018 |
| Foundry Lettings Ltd | Financial services | 2019 |
| Foundry Place Management Company Limited | Extraterritorial | 2004 |
| Four Acorns Ltd | Administrative & support | 2026 |
| Four Stroke Media Ltd | Professional & scientific | 2018 |
| Francis Lloyd Trading Ltd | Wholesale & retail | 2022 |
| Free Solar EE Limited | Professional & scientific | 2015 |
| Freightpay Assist Ltd | Administrative & support | 2026 |
| Fremzy Limited | Administrative & support | 2016 |
| French Organic Wine Importers Limited | Other services | 2020 |
| FRENCH22 Limited | Real estate | 2020 |
| Fresh Future Ltd | Administrative & support | 2007 |
| Friendly Support Services Limited | Health & social care | 2011 |
| Frithgate Limited | Wholesale & retail | 1983 |
| Frost Electrical Limited | Construction | 2026 |
| FTZ Studios Limited | Information & communication | 2014 |
| Fuelpeople Limited | Professional & scientific | 2005 |
| Full Circle Dating Limited | Other services | 2017 |
| Fumoney Ltd | Wholesale & retail | 2021 |
| Fund Jumpers Limited | Manufacturing | 2020 |
| Furlong WEB3 Ltd | Professional & scientific | 2022 |
| Fusion Glow Limited | Wholesale & retail | 2023 |
| Future Innovation Recycling Enterprise Limited | Professional & scientific | 2021 |
| Future Manuf Ltd | Professional & scientific | 2018 |
| Fyzuntu Games Limited | Wholesale & retail | 2013 |
| G L Aerodynamics Limited | Administrative & support | 2002 |
| G Trusswell Consultancy Limited | Health & social care | 2015 |
| G&E Freehold Ltd | Households | 2015 |
| G&W Fabrications Ltd | Manufacturing | 2018 |
| G'S Coffee Bar Ltd | Manufacturing | 2025 |
| Gallacher Loft Conversions Limited | Construction | 2021 |
| Gallery View Ltd | Information & communication | 2022 |
| Game Day Sports Presentation Ltd | Arts & recreation | 2024 |
| Games Night Ltd | Wholesale & retail | 2026 |
| Gang Forward Limited | Professional & scientific | 1999 |
| Gangas Spice Ltd | Hospitality | 2026 |
| Gapa Consulting Limited | Professional & scientific | 2014 |
| Gaps-Tech Limited | Professional & scientific | 2022 |
| Garnham Investments Limited | Financial services | 2018 |
| Gary Enterprises Ltd | Other services | 2010 |
| GAS & Electrical Services Ltd | Construction | 2015 |
| Gawcott Rose Ltd | Other services | 2023 |
| Gazewell Property Ltd | Real estate | 2018 |
| GB Interior Systems Ltd | Construction | 2026 |
| Gblb World Limited | Wholesale & retail | 2021 |
| Gbsb Consulting Ltd | Professional & scientific | 2020 |
| Gcnhub UK Ltd | Other services | 2019 |
| GED Property Limited | Real estate | 2021 |
| Gelert Associates Limited | Extraterritorial | 2017 |
| Genesis Software Limited | Information & communication | 2022 |
| Genesis Solar Limited | Wholesale & retail | 2017 |
| Genesisprop LLP | | 2016 |