| Forget-Me-Not Vintage & Dolls Ltd | Wholesale & retail | 2023 |
| Forgrace Ltd | Health & social care | 2023 |
| Forjoe Capital Ltd | Real estate | 2019 |
| Form and Hold Estates Ltd | Real estate | 2025 |
| Forma Workplace Limited | Manufacturing | 2023 |
| Formby Storage Ltd | Construction | 2022 |
| Formgraphics Limited | Manufacturing | 1986 |
| Forsa Utilities Limited | Water & waste | 2024 |
| Fort Concept Services Ltd Ltd | Wholesale & retail | 2022 |
| Fort Mansions Management Limited | Households | 2000 |
| Fortashe Limited | Real estate | 2021 |
| Forthegods Limited | Information & communication | 2022 |
| FORTI5 Ltd | Wholesale & retail | 2023 |
| Fortis and Noble Ltd | Professional & scientific | 2025 |
| Fortress International Limited | Professional & scientific | 2009 |
| Forward Finance Solutions Ltd | Information & communication | 2016 |
| Forward Steps Ltd | Health & social care | 2020 |
| Fount Virtue Limited | Professional & scientific | 2012 |
| Fountain of Praise Christian Center | Other services | 2016 |
| Four F Property Ltd | Real estate | 2024 |
| FOX Valentine Group Ltd | Professional & scientific | 2022 |
| FOX Wardrobes Ltd | Construction | 2012 |
| Foxy Mechanical Services Ltd | Construction | 2023 |
| Franco & Ciccio Forza Ltd | Hospitality | 2023 |
| Francomb's Bespoke Joinery Ltd | Manufacturing | 2023 |
| Frank Finance Ltd | Information & communication | 2025 |
| Fratelly Zingary Ltd | Wholesale & retail | 2023 |
| Fred Richard & Associates Ltd | Other services | 2013 |
| Freight Express-Seacon (RYE) Limited | Transport & logistics | 1973 |
| Fresh Health Childcare Limited | Education | 2018 |
| Fromow Services Limited | Administrative & support | 2014 |
| Frontline Business Consultancy Ltd | Financial services | 2008 |
| Frsh Custom Limited | Wholesale & retail | 2016 |
| Fruitful Vine Yard Ltd | Real estate | 2026 |
| FRY Brickwork & Building Ltd | Construction | 2022 |
| FRY FM Limited | Administrative & support | 2025 |
| FRY Group Ltd | Financial services | 2025 |
| FRY MEP Limited | Construction | 2025 |
| FRY MM Limited | Other services | 2018 |
| FRY Plant Hire Limited | Administrative & support | 2025 |
| FRY Site Services Limited | Construction | 2024 |
| FRY Trading Ltd | Wholesale & retail | 2023 |
| FSD Maintenance Ltd | Construction | 2025 |
| FSP Construction Limited | Construction | 2020 |
| FT 2020 Ltd | Education | 2018 |
| FT Driving Limited | Construction | 2023 |
| Fulfilling Healthcare Ltd | Health & social care | 2021 |
| Full Intensity Limited | Arts & recreation | 2015 |
| Funny Hands Media Ltd | Information & communication | 2016 |
| Furn & LOW GAS Ltd | Construction | 2024 |
| Furze Associates Limited | Construction | 2024 |
| Fusion Matrix Care Ltd | Health & social care | 2020 |
| Fusion Matrix Limited | Hospitality | 2020 |
| Future Community Pathways CIC | Arts & recreation | 2024 |
| Future Insight Accounting Ltd | Professional & scientific | 2017 |
| Future Insight Bookkeepers Ltd | Professional & scientific | 2018 |
| Future Insight Consultancy Ltd | Professional & scientific | 2011 |
| Future Insight Group Limited | Financial services | 2018 |
| Future Properties London Limited | Real estate | 2002 |
| Future Properties Northolt Ltd | Real estate | 2020 |
| Future Property (MR) Ltd | Hospitality | 2015 |
| Futureshift Skills Hub CIC | Education | 2025 |
| FØN Energy Services UK Wind Ltd | Professional & scientific | 2014 |
| G & B Land Survey Ltd | Construction | 2016 |
| G & G Dry-Lining Ltd | Construction | 2024 |
| G & M Motors Limited | Wholesale & retail | 2025 |
| G Fuller Services Limited | Construction | 2023 |
| G I Woodruff & Sons Ltd | Construction | 2018 |
| G Nimmo Builders Ltd | Construction | 2009 |
| G Rendering Ltd | Construction | 2012 |
| G S Hoomes Limited | Real estate | 2024 |
| G&J Engineering & Erection Services Ltd | Construction | 2011 |
| G&J Prime Health Care Services Ltd | Health & social care | 2025 |
| G&N Catering Limited | Hospitality | 2020 |
| G&S Carpentry Services Ltd | Construction | 2023 |
| G&T Events Ltd | Other services | 2022 |
| G&T Outdoor Events Ltd | Arts & recreation | 2023 |
| G-Mac Construction Ltd | Construction | 2018 |
| G-Secure Limited | Extraterritorial | 2013 |
| G-Spec Contractors Ltd. | Construction | 2016 |
| G-Tek International Ltd | Wholesale & retail | 2018 |
| G-Works Retail (Gravesend) Limited | Wholesale & retail | 2017 |
| G.A. Autos Ltd | Administrative & support | 2008 |
| G.C.Ride Ventures Limited | Health & social care | 2014 |
| G.H. Supplies Ltd | Wholesale & retail | 1996 |
| G.M. Mechanical & Welding Services Limited | Construction | 1994 |
| G.S. Plastering Ltd | Construction | 2016 |
| G.U. Home Renovation Ltd | Construction | 2021 |
| G/L Transport Ltd | Transport & logistics | 2019 |
| G11 Financial Management Limited | Financial services | 2005 |
| G1P Limited | Construction | 2020 |
| G8AUTOMATION Ltd | Manufacturing | 2026 |
| GA EOT Trustee Company Limited | Financial services | 2025 |
| Gabnichi Ltd | Health & social care | 2018 |
| Gabriel AGE Trans Ltd | Transport & logistics | 2022 |
| Gabriel Baltag Transport Ltd | Transport & logistics | 2018 |
| Gabriel Cosmin Transport Ltd | Transport & logistics | 2017 |
| Gabriel Titi Construction Ltd | Construction | 2019 |
| Gabriellas Thai & Mediterranean Ltd | Hospitality | 2023 |
| Gaby Trans Limited | Transport & logistics | 2015 |