| Fenn Logistics Limited | Transport & logistics | 2001 |
| Fenwick Alloys NW Ltd | Construction | 2023 |
| Feonmed Healthcare Ltd | Wholesale & retail | 2021 |
| Ferguson B Ltd | Health & social care | 2007 |
| Ferguson Property Rental Ltd | Hospitality | 2021 |
| Fern Doors Limited | Manufacturing | 1998 |
| Fern Hill Land Limited | Real estate | 2017 |
| Fern Innovation Limited | Other services | 2011 |
| Fern Tranport Ltd | Transport & logistics | 2025 |
| Fernleigh Nursery Ltd | Agriculture & fishing | 2020 |
| Fernleigh Wearden & Company Ltd | Financial services | 2020 |
| Fernlight Ltd. | Administrative & support | 2014 |
| Ferranova Ltd | Construction | 2026 |
| Ferranti Motors Ltd | Wholesale & retail | 2025 |
| Ferret Live Productions CIC | Arts & recreation | 2022 |
| Ferry Estates Ltd | Real estate | 2023 |
| Fertile Frog Limited | Information & communication | 2012 |
| Festa Consulting 2 Ltd | Wholesale & retail | 2023 |
| Festa Consulting Ltd | Professional & scientific | 2018 |
| Festoon Media Ltd | Other services | 2024 |
| Fever Dance Club Ltd | Education | 2019 |
| Fever Dance Company Limited | Arts & recreation | 2006 |
| FEZ Transport Ltd | Transport & logistics | 2018 |
| FFF Holdings Limited | Financial services | 2004 |
| FFF Property Services Limited | Real estate | 2017 |
| FFL Capital Projects Limited | Construction | 2009 |
| Ffta Limited | Hospitality | 2024 |
| FG Garden Design Ltd | Administrative & support | 2025 |
| FGH Dogs Ltd | Agriculture & fishing | 2024 |
| Fgprojects-Uk Ltd | Professional & scientific | 2024 |
| FGR Trustee One Limited | Other services | 2024 |
| FGR Trustee Two Limited | Other services | 2024 |
| FH Preston Foods Limited | Hospitality | 2022 |
| FHA Limited | Wholesale & retail | 2019 |
| Fhame Entertainment Ltd | Wholesale & retail | 2022 |
| Fhemeeda Patel Limited | Other services | 2025 |
| Fhhiy Properties Ltd | Real estate | 2026 |
| FHK Investments Ltd. | Wholesale & retail | 2017 |
| Fiamma Holding Investments Ltd | Professional & scientific | 2016 |
| FIB Assets Limited | Financial services | 2026 |
| Fiddlers Milk Delivery Ltd | Wholesale & retail | 2026 |
| Fidelity-Max Limited | Wholesale & retail | 2024 |
| Fidura Consulting Ltd | Professional & scientific | 2026 |
| Field and Fire Limited | Manufacturing | 2024 |
| Field Media Limited | Information & communication | 2015 |
| Fieldhead Properties Limited | Real estate | 2021 |
| Fielding Limited | Construction | 2008 |
| Fields (Coniston) Ltd | Real estate | 2026 |
| Fifi and Philly Coffee Corner Limited | Hospitality | 2024 |
| Fifth Avenue Beauty Ltd | Other services | 2025 |
| Fifth Gear Competitions Ltd | Arts & recreation | 2025 |
| FIFTYFIVE5 Recruitment Limited | Administrative & support | 2022 |
| Fiftysix Spares UK Limited | Wholesale & retail | 2023 |
| FIG and Olives Foods Ltd | Hospitality | 2023 |
| FIG Limited | Wholesale & retail | 2011 |
| Figaros 1 Company Limited | Hospitality | 2017 |
| Figure Pilates Limited | Arts & recreation | 2025 |
| FII Qissah Limited | Wholesale & retail | 2025 |
| Fija Limited | Real estate | 2002 |
| Filesimple Limited | Information & communication | 2026 |
| Fill N' Go Limited | Professional & scientific | 2012 |
| Film Scan UK Limited | Professional & scientific | 2015 |
| Filmd Ltd | Arts & recreation | 2020 |
| Filmd Services Ltd | Arts & recreation | 2022 |
| Filo Accountants Limited | Professional & scientific | 2020 |
| Filtee Fleetwash Limited | Other services | 2014 |
| FIN Marketing Limited | Professional & scientific | 2024 |
| Fin-Ai Solutions Ltd | Professional & scientific | 2026 |
| Final Debt Recovery Ltd | Administrative & support | 2025 |
| Final Formalities Ltd | Professional & scientific | 2020 |
| Finalcoursedesign Ltd | Professional & scientific | 2026 |
| Finalscale Limited | Information & communication | 1996 |
| Finalux Ltd | Real estate | 2023 |
| Finance & Accounting Corporate Limited | Professional & scientific | 2014 |
| Financial GP Limited | Extraterritorial | 2020 |
| Financial Hygienics Limited | Financial services | 2025 |
| Financial Minefield Ltd | Financial services | 2004 |
| Financial Resources Limited | Professional & scientific | 1998 |
| Financial Saviour Limited | Administrative & support | 2016 |
| Finch Newco Limited | Financial services | 2026 |
| Finducar Limited | Wholesale & retail | 2008 |
| Findyourwayfitness Ltd | Arts & recreation | 2025 |
| Fineline Properties Ltd | Real estate | 2022 |
| Fineline Trim Ltd | Other services | 2026 |
| Finesse Roofline Ltd | Construction | 2007 |
| Finley Brickwork Ltd | Construction | 2013 |
| Finn Burger Ltd | Hospitality | 2025 |
| Finn Mccarthy Real Estate Ltd | Real estate | 2025 |
| Finney and Hardicker Limited | Real estate | 1981 |
| Finome Limited | Information & communication | 2023 |
| Finotapas Ltd | Hospitality | 2018 |
| Fins Outdoors Limited | Wholesale & retail | 2023 |
| Finson Property Limited | Construction | 2017 |
| Fintec Engineering Europe Ltd | Manufacturing | 2023 |
| Fintec Groundworks Limited | Administrative & support | 2016 |
| Fintec Utilities Limited | Construction | 2022 |
| Finton Doyle Limited | Professional & scientific | 2010 |
| Finwin Limited | Information & communication | 2026 |
| Fiona Beaumont Education Consultancy Ltd | Education | 2019 |
| FIQ Ltd | Arts & recreation | 2024 |