| Formcare Limited | Professional & scientific | 2024 |
| Foros Advisory Ltd | Other services | 2021 |
| Forrest Properties Ltd | Real estate | 2021 |
| Fort Traders Ltd | Wholesale & retail | 2024 |
| Fortel London Ltd | Construction | 2023 |
| Fortex Property Ltd | Real estate | 2026 |
| Forthium Ltd | Wholesale & retail | 2025 |
| Fortilly Ltd | Health & social care | 2024 |
| Fortiwave Guardian Limited | Administrative & support | 2025 |
| Fortress Asset Group Ltd | Real estate | 2025 |
| Fortress Protection Security Ltd | Other services | 2022 |
| Fortune Clipper (UK) Limited | Professional & scientific | 2013 |
| Fortune Drylining Ltd | Construction | 2024 |
| Fortune First Ltd | Hospitality | 2024 |
| Fortune Trading Services UK Ltd | Wholesale & retail | 2024 |
| Forwardians Limited | Health & social care | 2020 |
| FOS Buildings Limited | Construction | 2018 |
| Foscom Property Services Ltd | Real estate | 2022 |
| Fotacheandalex Limited | Construction | 2022 |
| Fountain Healthcare Ltd | Health & social care | 2018 |
| Four Mighty Brothers Ltd | Wholesale & retail | 2024 |
| Four Seasons Driveways & Patios Ltd | Administrative & support | 2025 |
| Foyer Limited | Hospitality | 2019 |
| FR Logistics Ltd | Transport & logistics | 2024 |
| FR Security Ltd | Administrative & support | 2020 |
| Frameworks & Narratives Consulting Ltd | Professional & scientific | 2024 |
| Fran Healthcare Ltd | Health & social care | 2022 |
| Francas Building Ltd | Construction | 2011 |
| Francbless Community Outreach CIC | Health & social care | 2024 |
| Francis T Samuel Transport Ltd | Transport & logistics | 2024 |
| Frandel Care & Support Services Ltd | Health & social care | 2024 |
| Frankielz Company Limited | Health & social care | 2015 |
| Frankus Ltd | Administrative & support | 2016 |
| Franova Emporium Ltd | Wholesale & retail | 2025 |
| Fransthesy Care UK Ltd | Health & social care | 2023 |
| Fraser Health Ltd | Health & social care | 2015 |
| Fray Bentos Construction Ltd | Construction | 2016 |
| FRC85 Ltd | Construction | 2026 |
| Frcp Ventures Ltd | Health & social care | 2018 |
| Fred the Bull Limited | Construction | 2023 |
| Fredi Construction Ltd | Construction | 2022 |
| Freightorix Limited | Transport & logistics | 2025 |
| Fresh Crate Ltd | Wholesale & retail | 2020 |
| Fresh OFF the Boat Ltd | Wholesale & retail | 2021 |
| Fresh Washroom Services Ltd. | Water & waste | 2021 |
| Freshery UK Limited | Wholesale & retail | 2019 |
| Freshiuk Limited | Construction | 2014 |
| Friends of Art & Silversmith Ltd | Manufacturing | 2013 |
| Friends of the Bridegroom International Ministries | Other services | 2009 |
| Friethan Ltd | Professional & scientific | 2022 |
| Fritzdylfa Social Care Limited | Health & social care | 2019 |
| FRO Consultancy Ltd | Professional & scientific | 2021 |
| FRO Property Ltd | Real estate | 2023 |
| Frontisti Services Limited | Health & social care | 2017 |
| Frost’Sconstruction Ltd | Manufacturing | 2019 |
| Froyo Food Ltd | Hospitality | 2014 |
| Frson Limited | Information & communication | 2021 |
| Frugal Finds Ltd | Wholesale & retail | 2023 |
| Fruitful Hands Ltd | Health & social care | 2025 |
| Fruitman 777 Ltd | Wholesale & retail | 2020 |
| FS Professional IT Services Limited | Information & communication | 2020 |
| FS Transcon Ltd | Transport & logistics | 2024 |
| Fsbt Ltd | Professional & scientific | 2010 |
| FSF Excellence Consultancy Limited | Health & social care | 2014 |
| FSK Associates Ltd | Real estate | 2025 |
| FTK Construction Ltd | Construction | 2025 |
| Fubon Technologies Limited | Wholesale & retail | 2019 |
| Fuego Ltd | Wholesale & retail | 2026 |
| Fulfillit Ltd | Information & communication | 2022 |
| Full Gospel Ministerial Board Ltd | Other services | 2025 |
| Fulvex Ltd | Wholesale & retail | 2026 |
| Funkyday Limited | Hospitality | 2015 |
| Funmi B Limited | Health & social care | 2013 |
| Funmiz Admin Services Limited | Administrative & support | 2016 |
| Furkan(Uk) Ltd | Wholesale & retail | 2022 |
| Furnicuta Ltd | Construction | 2020 |
| Furniture Home Ltd | Wholesale & retail | 2025 |
| Fusion Design London Ltd | Information & communication | 2022 |
| Fusion Fork Ltd | Hospitality | 2024 |
| Fusion Nest Ltd | Wholesale & retail | 2024 |
| Fusionsa Ltd | Wholesale & retail | 2023 |
| Future Business Installations Ltd | Transport & logistics | 2019 |
| Future Care Service 2000 Ltd | Health & social care | 2025 |
| Future Care Service 2010 Limited | Administrative & support | 2020 |
| Future Carpentry & Construction Ltd | Construction | 2022 |
| Future Consultants (UK) Limited | Professional & scientific | 2014 |
| Future Plan Services Limited | Health & social care | 2019 |
| Futuregen Properties Limited | Real estate | 2023 |
| Futurewise Limited | Transport & logistics | 2024 |
| Fuxion Group Ltd | Professional & scientific | 2025 |
| FVA Telecom Ltd | Construction | 2025 |
| FX Plumbing & Heating Ltd | Construction | 2022 |
| Fxfashion UK Ltd | Wholesale & retail | 2022 |
| Fyniti Limited | Information & communication | 2024 |
| Fynora Digital Ltd | Information & communication | 2026 |
| FYS Construction Ltd | Construction | 2025 |
| Fz.Kickz Ltd | Wholesale & retail | 2023 |
| Fête DE LA Musique Francophone UK Ltd | Arts & recreation | 2017 |
| G & G Cleaning and Building Services Ltd | Administrative & support | 2025 |
| G & I Contractors Ltd | Construction | 2021 |