| Finance Education Centre Ltd | Other services | 2020 |
| Financial Fusion UK Ltd | Administrative & support | 2023 |
| Financial Recruit Limited | Administrative & support | 2016 |
| Finch Aggregates Limited | Wholesale & retail | 1981 |
| Finch Properties (NW) Limited | Real estate | 2025 |
| Fine Stitch Abayah Ltd | Wholesale & retail | 2026 |
| Fineside Timberframe Ltd | Construction | 2014 |
| Finest Fitting Ltd | Construction | 2024 |
| Fineva Holdings Ltd | Financial services | 2026 |
| Finished in Style Limited | Construction | 2018 |
| Finnian Gateley Ltd | Wholesale & retail | 2021 |
| Finns Organic Cosmetics Ltd | Manufacturing | 2025 |
| Finros Ltd | Wholesale & retail | 2026 |
| Fiona Castela Consulting Company Limited | Administrative & support | 2016 |
| Fire-Tech Coatings UK Ltd | Construction | 2021 |
| Fireworks Northwest Limited | Wholesale & retail | 2015 |
| Firmacucu Ltd | Wholesale & retail | 2022 |
| Firmedge Ltd | Information & communication | 2011 |
| First 4 Print Finishing Limited | Manufacturing | 2003 |
| First Call Care (London) Ltd | Other services | 2020 |
| First Call Estates (London) Ltd | Real estate | 2022 |
| First Choice Fork Truck Training Ltd | Education | 2008 |
| First Choice Telecommunications Ltd | Information & communication | 2022 |
| First Class Travel Ltd | Administrative & support | 2025 |
| First Hawk Limited | Professional & scientific | 2010 |
| First Light Creative Ltd | Professional & scientific | 2019 |
| First Stop Shop Ltd | Wholesale & retail | 2025 |
| First Stop Vehicle Hire Ltd | Administrative & support | 2020 |
| Firstchoicemotorsltd Ltd | Wholesale & retail | 2025 |
| FIS Property Management Ltd | Real estate | 2013 |
| Fisherground Ltd | Hospitality | 2010 |
| Fishmoor Chippery Ltd | Hospitality | 2024 |
| Fishmoor Healthcare Ltd | Health & social care | 2021 |
| Fishmoor Store Ltd | Wholesale & retail | 2016 |
| Fitapedia Ltd | Arts & recreation | 2022 |
| Fithaus UK Ltd | Construction | 2025 |
| Fitzhenry Holdings Limited | Construction | 2018 |
| Fitzpatrick Family Office Ltd | Financial services | 2025 |
| Five Star Builder Ltd | Manufacturing | 2024 |
| Five Star Property Sales & Lettings Ltd | Administrative & support | 2025 |
| Five Star Rental Ltd | Construction | 2025 |
| Fivetwelveforteen Ltd | Other services | 2024 |
| Fixit GAS Ltd | Construction | 2024 |
| Fiza Tech Ltd | Wholesale & retail | 2022 |
| FJ GAS and Heating Services Ltd | Construction | 2021 |
| FK Hybrid Ltd | Wholesale & retail | 2025 |
| Fkca Services Ltd | Professional & scientific | 2018 |
| Flare Direct Ltd | Wholesale & retail | 2021 |
| Flatcap Engineering Ltd | Manufacturing | 2022 |
| Flavours and Essences UK Limited | Manufacturing | 1998 |
| Flawless Roomz Ltd | Other services | 2025 |
| Fleet Serve Consultants Ltd | Professional & scientific | 2025 |
| FLEET247 Limited | Information & communication | 2022 |
| Fleming Heritage Limited | Administrative & support | 2001 |
| Fletchers Scaffolding Service's Ltd | Construction | 2019 |
| Flex Deal Ltd | Wholesale & retail | 2026 |
| Flexi Box Self Storage Limited | Other services | 2025 |
| Flexi Removals Limited | Transport & logistics | 2017 |
| Flexin Gym Wear Ltd | Wholesale & retail | 2026 |
| Flippin Bounty Limited | Wholesale & retail | 2026 |
| Floormonk UK Ltd | Wholesale & retail | 2026 |
| Floors 'N' Carpets Ltd | Wholesale & retail | 2005 |
| Floorz 'N' Doorz (UK) Ltd | Wholesale & retail | 2008 |
| Flourish and Prosper Ltd | Health & social care | 2025 |
| Flower Occasions Limited | Wholesale & retail | 2019 |
| FM Finds Ltd | Wholesale & retail | 2025 |
| FM General Trading Ltd | Wholesale & retail | 2020 |
| FMA Properties Ltd | Real estate | 2021 |
| Fmas Group Limited | Other services | 2024 |
| FMB Ltd | Professional & scientific | 2019 |
| FMC Consultancy Ltd | Professional & scientific | 2023 |
| FMG Enterprise Ltd | Wholesale & retail | 2026 |
| Fmtt Hospitality Limited | Administrative & support | 2019 |
| Fmtt Limited | Administrative & support | 2014 |
| FMW Electrical Contractors Limited | Manufacturing | 2011 |
| FN Medical Limited | Health & social care | 2025 |
| FND Therapy Services Ltd | Other services | 2026 |
| FNV 2 Ltd | Wholesale & retail | 2020 |
| FNV 3 Ltd | Wholesale & retail | 2021 |
| Foam Galaxy Limited | Manufacturing | 2026 |
| Focus Hearing Ltd | Wholesale & retail | 2020 |
| Focus Pro Ltd | Other services | 2016 |
| FOG Mansion Ltd | Administrative & support | 2017 |
| Fogartys Financial Services Limited | Financial services | 2016 |
| Fone Trade Limited | Wholesale & retail | 2012 |
| Fones Care GH Ltd | Wholesale & retail | 2026 |
| Fones.Com Limited | Information & communication | 2006 |
| Fonez Shop Limited | Wholesale & retail | 2019 |
| FONEZ4ALL Limited | Wholesale & retail | 2006 |
| Fonezone Distribution Limited | Information & communication | 2012 |
| Fonthill Mews Management Limited | Households | 2017 |
| Food & Hospitality Ltd | Wholesale & retail | 2020 |
| Food 4 Blackburn Ltd | Hospitality | 2026 |
| Food by TOM Byrom Limited | Hospitality | 2021 |
| Food Plus Accy Limited | Wholesale & retail | 2024 |
| Food Safety and Hygiene Solutions Limited | Hospitality | 2019 |
| Food Smuggler Ltd | Hospitality | 2024 |
| Foot Fall Flooring Limited | Manufacturing | 2011 |
| Footfall Distribution Ltd | Professional & scientific | 2005 |
| Foottech Designs Ltd | Professional & scientific | 2025 |