| Foundational Approach Limited | Extraterritorial | 1973 |
| Foundations for Life Ltd | Extraterritorial | 2008 |
| Foundations PRS LLP | | 2015 |
| Foundations the Estate Agents Limited | Real estate | 2005 |
| Founders Finance Studio Limited | Professional & scientific | 2025 |
| Foundrometers Limited | Manufacturing | 2024 |
| Foundry Cyber Limited | Information & communication | 2026 |
| Foundry Nexus Ltd | Administrative & support | 2025 |
| Fount Investment Ltd | Real estate | 2020 |
| Fountain Dental Limited | Health & social care | 2025 |
| Fountain Diagnostic Limited | Health & social care | 2006 |
| Fountain Foods Morley Ltd | Wholesale & retail | 2023 |
| Fountain OUT of School Club Limited | Education | 2010 |
| Four Accountancy Ltd | Professional & scientific | 2015 |
| Four Corners Yorkshire Ltd | Real estate | 2025 |
| Four Eyes Properties Limited | Real estate | 2021 |
| Four Four Music Composition Ltd | Information & communication | 2024 |
| Four Gable Properties Ltd | Real estate | 2021 |
| Four Leaf Clover Classics Limited | Manufacturing | 2015 |
| Four Lights Investments Limited | Real estate | 2025 |
| Four Plus 4 Holdings Limited | Financial services | 2024 |
| Four Plus 4 Limited | Wholesale & retail | 2002 |
| Four Seasons Control (UK) Limited | Manufacturing | 2014 |
| Four Star Holdings Limited | Real estate | 2026 |
| Four Star Ventures Ltd | Information & communication | 2023 |
| Four Trade Wholesalers Ltd | Wholesale & retail | 2023 |
| FOUR89 Ltd | Hospitality | 2017 |
| Fourboys (Leeds) Ltd | Hospitality | 2025 |
| Fourj Painting & Decorating Limited | Construction | 2026 |
| Fourtysix Creative Ltd | Information & communication | 2025 |
| Fowlds Cooke Group Ltd | Financial services | 2025 |
| Fowler & Powell Limited | Real estate | 2018 |
| Fowler & Powell Sales Limited | Real estate | 2019 |
| Fowler and Powell Investments Limited | Real estate | 2025 |
| Fowler Oldfield Limited | Administrative & support | 2008 |
| FOX & Finch Catering Limited | Hospitality | 2020 |
| FOX & Finch Corporate Catering Limited | Hospitality | 2024 |
| FOX & FOX Developments Limited | Real estate | 2018 |
| FOX & Horbury Ltd | Real estate | 2022 |
| FOX & Hound Hotel Ltd | Extraterritorial | 2024 |
| FOX & Hounds Hotel Slapewath Ltd | Hospitality | 2019 |
| FOX Agency Holdings Limited | Financial services | 2025 |
| FOX and Grapes (Leeds) Limited | Hospitality | 2026 |
| FOX and Grapes Limited | Hospitality | 2015 |
| FOX Builders Merchants Limited | Real estate | 2024 |
| FOX Communications (UK) Limited | Professional & scientific | 2011 |
| FOX Craft Ltd | Manufacturing | 2025 |
| FOX Force Five Ltd | Real estate | 2024 |
| FOX Industrial Doors Limited | Manufacturing | 2017 |
| FOX Lloyd Jones Limited | Real estate | 2003 |
| FOX Lloyd Limited | Professional & scientific | 2018 |
| FOX Mccoy Properties Limited | Real estate | 2023 |
| FOX Red Risk Consulting Ltd | Professional & scientific | 2019 |
| FOX River Investments Ltd | Other services | 2023 |
| FOX Scaffolders Limited | Real estate | 2024 |
| FOX Social Enterprise CIC | Education | 2021 |
| FOX Squared Limited | Professional & scientific | 2025 |
| Foxbridge Products Limited | Wholesale & retail | 2025 |
| Foxcroft Roofing LLP | | 2024 |
| Foxdale View House Management Company Limited | Households | 1982 |
| Foxes Media Ltd | Professional & scientific | 2025 |
| Foxesorg Ltd | Wholesale & retail | 2026 |
| Foxglove Contracts Ltd | Construction | 2018 |
| Foxhill Court Limited | Households | 1975 |
| Foxhill Media Limited | Information & communication | 2015 |
| Foxholme Direct Ltd | Information & communication | 2006 |
| Foxie Pops Ltd | Information & communication | 2024 |
| Foxshire Limited | Professional & scientific | 2013 |
| Foxtrad Limited | Professional & scientific | 2019 |
| Foxwood Panyard Limited | Education | 2026 |
| Foxy FOX Cleaning Ltd | Administrative & support | 2025 |
| Foxy's Catering Ltd | Hospitality | 2026 |
| Fozard Building Co Limited | Construction | 2019 |
| FP Installations Limited | Construction | 2012 |
| FPD Group Limited | Manufacturing | 2007 |
| FPG Marketing Ltd | Other services | 2013 |
| FPS (North) Ltd | Construction | 2020 |
| FPS2 Ltd | Administrative & support | 2022 |
| FPW Management Limited | Professional & scientific | 2015 |
| FR Contracting Ltd | Professional & scientific | 2019 |
| FR Properties Leeds Ltd | Real estate | 2020 |
| FR1ENDS and FAM1LY Ltd | Wholesale & retail | 2025 |
| Fractal Group Ltd | Wholesale & retail | 2023 |
| Fractional Investments Ltd | Financial services | 2013 |
| Fracture Solutions Limited | Health & social care | 2011 |
| Fradley Park Industrial Limited | Real estate | 2014 |
| Fragrance Kiosk Ltd | Wholesale & retail | 2024 |
| Framcourt Developments Limited | Construction | 2002 |
| Frame & Tailor Holdings Limited | Professional & scientific | 2025 |
| Frame & Tailor Limited | Administrative & support | 2021 |
| Frame One Lounge Ltd | Arts & recreation | 2025 |
| Frame Tech Limited | Construction | 2006 |
| Franca Malcher Limited | Other services | 2018 |
| Franchise Business Training and Consultancy Limited | Professional & scientific | 2022 |
| Franchise Focused Sales Ltd | Administrative & support | 2013 |
| Franchises Incorporated PVT Limited | Professional & scientific | 2026 |
| Francis & Company Property Consultants Limited | Professional & scientific | 2008 |
| Francis David Limited | Real estate | 2012 |
| Francis Transport Services Limited | Information & communication | 1999 |
| Franco's Trattoria Limited | Real estate | 2014 |