| Facility Managers Ltd | Construction | 2018 |
| Facsimile Ltd | Financial services | 2019 |
| Fadep Limited | Construction | 2023 |
| Fair Choice Limited | Wholesale & retail | 2024 |
| Fair Property Lettings Ltd | Manufacturing | 2020 |
| Fairbairn Amateur Boxing Club CIC | Arts & recreation | 2018 |
| Fairplace Ltd | Professional & scientific | 2019 |
| Fairway Homes & Property Ltd | Real estate | 2025 |
| Faith Builder UK Ltd | Construction | 2026 |
| Fajem Resources Ltd | Health & social care | 2022 |
| FAL Impact Limited | Professional & scientific | 2020 |
| Fallacy Ltd | Wholesale & retail | 2025 |
| Family Dwellings Ltd | Real estate | 2019 |
| Famo Bodywork Garage Ltd | Wholesale & retail | 2024 |
| Famruch Properties Ltd | Real estate | 2019 |
| Famug Limited | Administrative & support | 2019 |
| Fancy Dessert Ltd | Hospitality | 2026 |
| Farid’S Property Development Ltd | Real estate | 2024 |
| Fariyals Ltd | Real estate | 2015 |
| Farm Grays Pizza Ltd | Hospitality | 2025 |
| Farm House Properties Investment Group Ltd | Real estate | 2026 |
| Farmview Support Services Ltd | Health & social care | 2025 |
| Farus Ltd | Transport & logistics | 2024 |
| Fashlad Ultimate Ltd | Real estate | 2024 |
| Fast Competitions Limited | Wholesale & retail | 2025 |
| Fast Engines Limited | Wholesale & retail | 2016 |
| Fast Fixers Ltd | Construction | 2018 |
| Fast Lane Parts Limited | Wholesale & retail | 2026 |
| Fast Tomasz Ltd | Transport & logistics | 2018 |
| Fast Tracks Limited | Wholesale & retail | 2002 |
| Fathom Digital Ltd | Information & communication | 2023 |
| Faustino Tiffany & Co Limited | Health & social care | 2014 |
| Favourite Foods Ltd | Hospitality | 2026 |
| Fawks Properties Limited | Real estate | 2024 |
| Façade Construction Team Ltd | Construction | 2024 |
| Fbaworkinsales Ltd | Wholesale & retail | 2024 |
| Fbts International Limited | Wholesale & retail | 2023 |
| FCC Properties Limited | Construction | 2022 |
| FCD Property Solutions Ltd | Construction | 2019 |
| Feed Your Soul Ltd | Hospitality | 2025 |
| Fegm Law Tech Ltd | Professional & scientific | 2017 |
| Fehu Petio Ltd | Transport & logistics | 2021 |
| FEJ Limited | Construction | 2015 |
| Felka Company Limited | Construction | 2008 |
| Felmoor Holidays Limited | Hospitality | 2019 |
| Ferdinand Fajuyitan Ltd | Administrative & support | 2019 |
| Ferdinc Ltd | Financial services | 2024 |
| Ferdous Distribution Ltd | Wholesale & retail | 2025 |
| Fernscot Ltd | Professional & scientific | 2000 |
| Fernside Accounting Limited | Professional & scientific | 2017 |
| Fessok Group Ltd | Professional & scientific | 2025 |
| Fest Force Media and Communications Ltd | Professional & scientific | 2025 |
| Festevent Group Ltd | Arts & recreation | 2025 |
| Festus .Francis Widow/Widower | Health & social care | 2020 |
| Fesvebi Ltd | Education | 2025 |
| Fettom Properties Ltd | Real estate | 2021 |
| FFG Investments Limited | Real estate | 2002 |
| FG27 Property Investment Limited | Real estate | 2025 |
| FHP Property Limited | Real estate | 2022 |
| Fibrenow Ltd | Information & communication | 2019 |
| Fidelity Investments Essex Limited | Transport & logistics | 2023 |
| Fieldgate Creative Ltd | Professional & scientific | 2023 |
| Fielding Transport Limited | Transport & logistics | 2024 |
| Films Inkk Ltd | Information & communication | 2018 |
| Filoxenia Healthcare Ltd | Health & social care | 2016 |
| Finance and Accounting Tuition Ltd | Education | 2022 |
| Finance Talents Ltd | Professional & scientific | 2014 |
| FINANCE4EDUCATION Limited | Professional & scientific | 2009 |
| Financialtech Intelligence Ltd | Information & communication | 2015 |
| Finches Holdings Ltd | Financial services | 2025 |
| Fincom Solutions Limited | Professional & scientific | 2025 |
| Fine Homes Construction Ltd | Construction | 2022 |
| Finsbury Business House Ltd | Wholesale & retail | 2005 |
| Firebird Esport Organization Ltd | Wholesale & retail | 2023 |
| Firesafe & Sound Limited | Wholesale & retail | 2011 |
| Firetech Construction Ltd | Construction | 2024 |
| Firmus Nutrition Ltd | Health & social care | 2025 |
| First Electrical Solutions Limited | Construction | 2023 |
| First Choice Surfacing Ltd | Construction | 2021 |
| First Class P&D Ltd | Construction | 2025 |
| First Class Property Lettings Ltd | Real estate | 2012 |
| First Grade Cleaning Services Ltd | Administrative & support | 2025 |
| First Pathway Limited | Financial services | 2024 |
| FIRSTSTOP4CARS Ltd | Wholesale & retail | 2020 |
| Fisic Transport Ltd | Transport & logistics | 2021 |
| Fiso Consultants Limited | Administrative & support | 2018 |
| Fitman Ltd | Construction | 2010 |
| Fitness Rebels Limited | Education | 2012 |
| Fitz Plant Ltd | Construction | 2025 |
| Fitzrovia Properties & Construction Limited | Construction | 2021 |
| Fixser Limited | Construction | 2025 |
| Fixup Consult Limited | Professional & scientific | 2021 |
| Fiyola Ltd | Real estate | 2024 |
| FK Prestige Real Estate Limited | Real estate | 2026 |
| FKS Group Ltd | Real estate | 2018 |
| Fl-Facilities Group Ltd | Construction | 2023 |
| Flakes Ventures Ltd | Financial services | 2020 |
| Flash Accommodations Ltd | Hospitality | 2023 |
| Flashfix Pro Ltd | Information & communication | 2024 |
| Flavcos Limited | Transport & logistics | 2014 |