| Fabode Sparkle Limited | Wholesale & retail | 2024 |
| Fabric Laundry Limited | Other services | 2024 |
| Face Glow Solutions Ltd | Other services | 2024 |
| FAD Holdings Ltd | Professional & scientific | 2025 |
| Fade Blade Grooming Lounge Limited | Other services | 2017 |
| Fair Deal Foods Limited | Wholesale & retail | 2024 |
| Fairlight Court (Greenford) Limited | Households | 1962 |
| Fairview Court (Chinnor Crescent) Management Limited | Households | 2015 |
| Faisal Rashid Chohan Ltd | Wholesale & retail | 2025 |
| Faithful Foundations Limited | Wholesale & retail | 2024 |
| Fakhri Traders Ltd | Wholesale & retail | 2021 |
| Falco Security Ltd | Administrative & support | 2024 |
| Falcon Radio Cars Ltd | Transport & logistics | 2009 |
| FALCON1 Services Limited | Professional & scientific | 2023 |
| Falconstruction Ltd | Construction | 2010 |
| Falgu & Co Limited | Wholesale & retail | 2008 |
| Falgu Properties Limited | Real estate | 2018 |
| Fallon Health + Safety Limited | Professional & scientific | 2007 |
| FAM Ltd | Real estate | 2024 |
| Faqu Limited | Administrative & support | 2015 |
| Faquaougars. Ltd | Manufacturing | 2024 |
| Farah Enterprise Ltd | Wholesale & retail | 2021 |
| Fardoy Limited | Professional & scientific | 2024 |
| Farid Karim Design Ltd | Professional & scientific | 2021 |
| Fariq Ltd | Wholesale & retail | 2025 |
| Farkouh Building Services Limited | Construction | 2019 |
| Farm Organic Fruit and VEG Ltd | Wholesale & retail | 2026 |
| Faro Contents Limited | Wholesale & retail | 2026 |
| Faryaab Ltd | Information & communication | 2018 |
| Fast Lane Wheels Ltd | Other services | 2019 |
| Fast MDX (IP) Limited | Administrative & support | 2011 |
| Fast MDX Limited | Professional & scientific | 1994 |
| Fast Track Mini BUS Limited | Transport & logistics | 2011 |
| Fateh Roofing Ltd | Construction | 2025 |
| Fatsa Limited | Hospitality | 2024 |
| Fauxx Family Limited | Information & communication | 2015 |
| Favor Easy (UK) Ltd | Real estate | 2022 |
| Fazil Enterprises Ltd | Transport & logistics | 2026 |
| FB Flexi Builders Ltd | Construction | 2016 |
| FD Engineering Services Ltd | Wholesale & retail | 2024 |
| Feeding Ealing CIC | Hospitality | 2022 |
| Ferdom Ltd | Information & communication | 2013 |
| Ferncrest Investments | Real estate | 1964 |
| Ferncrest Properties Limited | Professional & scientific | 2001 |
| Fernwood Homes Limited | Construction | 2022 |
| Ferrero UK Limited | Manufacturing | 1966 |
| FFA Logistics Ltd | Transport & logistics | 2019 |
| FHI Heat Limited | Wholesale & retail | 2024 |
| Fidelity Holdings Limited | Real estate | 2016 |
| Fidelity Property Holdings Limited | Financial services | 2017 |
| Fiesta Casa Ltd | Hospitality | 2025 |
| FIGO9 Ltd | Manufacturing | 2026 |
| Filebank Limited | Extraterritorial | 2002 |
| Filtrosol Limited | Wholesale & retail | 2011 |
| Financial Instruments Limited | | 2024 |
| Financial Rising Star Ltd | Other services | 2016 |
| Financial Services Hub Limited | Professional & scientific | 2015 |
| Fine Projects Limited | Construction | 2012 |
| Finest Build Ltd | Construction | 2007 |
| Fins Distributors Ltd | Wholesale & retail | 2026 |
| Fintech Development Services Ltd | Information & communication | 2025 |
| Firdaus Motors Ltd | Wholesale & retail | 2023 |
| Firemax Holdings Ltd | Financial services | 2021 |
| Firemax Properties Ltd | Real estate | 2021 |
| Firemax Protection Ltd | Construction | 2009 |
| Firmgate Limited | Administrative & support | 2017 |
| First Capital Properties Limited | Real estate | 2020 |
| First Class London Chauffeurs Ltd | Transport & logistics | 2023 |
| First Europe Limited | Professional & scientific | 1988 |
| First Step Property Ltd | Real estate | 2025 |
| Firstprimebuilt Ltd | Construction | 2025 |
| Fisys Limited | Information & communication | 2015 |
| Five Stars Construction Ltd | Construction | 2025 |
| Fiveboys Stationery Ltd | Wholesale & retail | 2026 |
| FL Projects Limited | Construction | 2024 |
| Flamin' Peri Peri Ltd | Hospitality | 2025 |
| Flamingo Cont Ltd | Wholesale & retail | 2021 |
| Flash Cargo Services Ltd | Transport & logistics | 2025 |
| Flashpoint Logistics Ltd | Transport & logistics | 2026 |
| Flatfresh Ltd | Administrative & support | 2025 |
| Fleetmill Holdings Limited | Financial services | 2018 |
| Fleetmill Limited | Construction | 1992 |
| Fleetmill Properties Limited | Construction | 2018 |
| Fleksi Ltd | Transport & logistics | 2014 |
| Flex Group Search Ltd | Real estate | 2026 |
| Flitpride Limited | Hospitality | 1997 |
| Flmcr Limited | Real estate | 2016 |
| Floor Design London Limited | Construction | 2013 |
| Floors R US Group Ltd | Construction | 2017 |
| Floortex Furnishing Ltd | Wholesale & retail | 2019 |
| Flowers and Gardens Limited | Wholesale & retail | 2017 |
| Flux Labs Limited | Information & communication | 2010 |
| Fluxcare Limited | Wholesale & retail | 2026 |
| Flyhigh Academy Limited | Education | 2020 |
| Flysom Ltd | Administrative & support | 2025 |
| FM Home Solutions Limited | Construction | 2022 |
| FMS Care Ltd | Health & social care | 2017 |
| FN Builders Limited | Construction | 2013 |
| Focus Accounting Services Ltd | Professional & scientific | 2015 |
| Focus Wide Limited | Professional & scientific | 2004 |