| Feltham Consultancy Ltd | Professional & scientific | 2024 |
| Fens Healthcare and Recruitment Limited | Administrative & support | 2019 |
| Feroz Investments Limited | Real estate | 2025 |
| Festyy Assessments Ltd | Public administration | 2026 |
| Ffej LLC Ltd | Real estate | 2022 |
| FHM Group Limited | Construction | 2025 |
| FHM Property Management Limited | Real estate | 2018 |
| Fiab Enterprises Ltd | Transport & logistics | 2018 |
| Fidan Property Ltd | Real estate | 2025 |
| Fidantech Ltd | Information & communication | 2011 |
| Filmanthropy CIC | Information & communication | 2017 |
| FIN Leathers Limited | Wholesale & retail | 2019 |
| Finch Enterprise Ltd | Information & communication | 2017 |
| Find Free Flow Limited | Education | 2021 |
| Fine Wooden Floors Limited | Other services | 2009 |
| Finemoulds Limited | Extraterritorial | 1992 |
| Finespark (Horsham) Limited | Extraterritorial | 1992 |
| Finishing Touches Barbers Ltd | Other services | 2018 |
| Finstead Limited | Real estate | 1978 |
| Firefly Foot and Ankle Clinic. Ltd | Other services | 2013 |
| Firkata Ltd | Transport & logistics | 2025 |
| Firm 1 Limited | Wholesale & retail | 2021 |
| First Choice Building Consultancy Limited | Professional & scientific | 2026 |
| First Step Enterprise Ltd | Wholesale & retail | 2025 |
| Fish Kalainchiyam Ltd | Wholesale & retail | 2025 |
| Fit & FUN 4 Everyone Limited | Arts & recreation | 2023 |
| Fitstretch Ltd | Health & social care | 2021 |
| Five Aside Theatre CIC | Arts & recreation | 2020 |
| FIX and Focus Ltd | Administrative & support | 2026 |
| FIX IT Autocentres Ltd | Wholesale & retail | 2025 |
| FIX Optimum 94 Ltd | Construction | 2019 |
| Fixxie Intl Ltd | Wholesale & retail | 2024 |
| FKM Lettings Limited | Real estate | 2025 |
| FL Alpha Ltd | Real estate | 2025 |
| Flare Consultants Ltd | Information & communication | 2017 |
| Flash Electrical Contracting Ltd | Construction | 2019 |
| Flash Force Limited | Wholesale & retail | 2025 |
| Flashwash LDN Limited | Other services | 2026 |
| Flavers Bakery Ltd | Wholesale & retail | 2019 |
| Fleet Riggers Limited | Other services | 2015 |
| Flexi Consultants Ltd | Administrative & support | 2017 |
| Flexible Teacher Talent Ltd | Information & communication | 2022 |
| Flexycall Ltd | Administrative & support | 2018 |
| Florencia Leonard Associates Limited | Administrative & support | 2024 |
| Florin's Management & Construction Ltd | Construction | 2019 |
| Floritah Limited | Public administration | 2022 |
| Flow State Fit Club Ltd | Arts & recreation | 2025 |
| Flowbizz Ltd | Wholesale & retail | 2024 |
| FM and Daughters Limited | Hospitality | 2022 |
| FML Advisory Limited | Professional & scientific | 2022 |
| FND Consultancy Services Ltd | Professional & scientific | 2022 |
| Focus 4 1 CIC | Health & social care | 2015 |
| Focus Accountants Ltd | Professional & scientific | 2009 |
| Focus Auto Ltd | Wholesale & retail | 2015 |
| Focus Commercial & Residential Properties Ltd | Real estate | 2026 |
| Focus Wines Ltd | Wholesale & retail | 2020 |
| Fofanah Properties Ltd | Real estate | 2023 |
| Fone&Vape Offlicence Limited | Other services | 2022 |
| Food Express (Balham) Ltd | Wholesale & retail | 2025 |
| Food Rites Limited | Information & communication | 2017 |
| Food.Inc Ltd | Hospitality | 2025 |
| FOR Ever Homes Group Ltd | Construction | 2022 |
| Forbes Fitness Training Ltd | Arts & recreation | 2018 |
| Forepoint Management Ltd | Professional & scientific | 2025 |
| Foresight Engineering Ltd | Construction | 2019 |
| Forestdale Property Management Limited | Financial services | 2023 |
| Forever Fenix Care Ltd | Households | 2017 |
| Foreword Media Services Limited | Information & communication | 2004 |
| Forma House Limited | Wholesale & retail | 1979 |
| Forma Lighting Limited | Manufacturing | 1973 |
| Fortcog Ltd | Wholesale & retail | 2020 |
| Fortress Security Group Ltd | Administrative & support | 2025 |
| Forty Two Consultancy Ltd | Professional & scientific | 2024 |
| Forum for Promoting Peace (London) | Education | 2019 |
| Foster Boyele Properties Ltd | Real estate | 2020 |
| Four Capital Limited | Wholesale & retail | 2021 |
| Four Square Property Management Ltd | Real estate | 2021 |
| Foxniche Management Ltd | Information & communication | 2016 |
| Framal Ltd | Wholesale & retail | 2024 |
| Framear Limited | Professional & scientific | 2025 |
| Framz Limited | Professional & scientific | 2024 |
| Francis & Family Ltd | Wholesale & retail | 2025 |
| Fransstrans Ltd | Transport & logistics | 2016 |
| Fraudrecoveryexperts Ltd | Professional & scientific | 2025 |
| Frelan Property Limited | Real estate | 2023 |
| French Resources Recruitment Ltd | Administrative & support | 2019 |
| Freolic Ltd | Manufacturing | 2014 |
| Fresh Fire Organisation Ltd | Professional & scientific | 2026 |
| Fresh Wave Security UK Limited | Administrative & support | 2019 |
| Freyaa Ltd | Health & social care | 2025 |
| FRIENDLY4 Cars Ltd | Transport & logistics | 2018 |
| Friends Motors Ltd | Wholesale & retail | 2020 |
| Front Bridge Services Limited | Administrative & support | 2013 |
| Frontend Backend Systems Limited | Professional & scientific | 2008 |
| Fruit and Vegetables Village Ltd | Wholesale & retail | 2025 |
| FRUIT2GO Ltd | Wholesale & retail | 2020 |
| FTJ & Co (London) Ltd | Real estate | 2025 |
| Full Circle Management Ltd | Real estate | 2018 |
| Full Circle Support UK Ltd | Health & social care | 2009 |
| Full of Promise | Other services | 2014 |