| FC Organics Ltd | Wholesale & retail | 2023 |
| FC Solutions Ltd | Information & communication | 2021 |
| FC518 Ltd | Real estate | 2018 |
| FCB Limited | Education | 2015 |
| FCD Healthcare Services Ltd | Health & social care | 2024 |
| Fcgh Limited | Manufacturing | 2018 |
| FCJ (Holdings) Ltd | Financial services | 2024 |
| FCL Equine Ltd | Administrative & support | 2016 |
| FCL Global Forwarding Ltd | Transport & logistics | 2012 |
| Fcnk Ltd | Information & communication | 2008 |
| FCP Building Ltd | Construction | 2024 |
| FCS Corporation Limited | Financial services | 2022 |
| FCS Group Holdings Limited | Financial services | 2025 |
| FCS Round Ltd | Information & communication | 2022 |
| FCS Software Solutions Limited | Information & communication | 2019 |
| FCS Systems Limited | Information & communication | 2025 |
| Fcsl Realisations Limited | Manufacturing | 2008 |
| Fcsm Consulting Ltd | Professional & scientific | 2026 |
| FD Data Services Limited | Information & communication | 1995 |
| FD Fire Systems Ltd | Public administration | 2025 |
| FD Food and Beverages Ltd | Manufacturing | 2026 |
| FD Limited | Wholesale & retail | 2025 |
| FDC (General Partner Meif II - Debt WM) Limited | Financial services | 2023 |
| FDC (Meif II - Debt WM Founders) LLP | | 2023 |
| FDC Carried Interest LLP | | 2019 |
| FDC Carry Partner Limited | Financial services | 2021 |
| FDC Debt LP | | 2019 |
| FDC General Partner Limited | Financial services | 2019 |
| FDC SPV Limited | Financial services | 2020 |
| Fdgsi Ltd | Wholesale & retail | 2025 |
| FDJ (Wholesale) Limited | Wholesale & retail | 2011 |
| Fdldn Birmingham Limited | Construction | 2025 |
| Fdmw Development Limited | Real estate | 2022 |
| FDO Capital Culinary Advisors Ltd | Professional & scientific | 2026 |
| FDO Capital Limited | Hospitality | 2025 |
| FDT & Sons Limited | Real estate | 2019 |
| FE FI FO Limited | Wholesale & retail | 2009 |
| FE Motor and MOT Ltd | Wholesale & retail | 2019 |
| FE Solihull Ltd | Hospitality | 2022 |
| Fear Conservation Limited | Construction | 2024 |
| Fearless Grappling Academy Ltd | Arts & recreation | 2025 |
| Fearless MMA Ltd | Arts & recreation | 2011 |
| Fearless Riders Limited | Arts & recreation | 2019 |
| Fearlessthaifit Ltd | Arts & recreation | 2024 |
| Feast Karachi Limited | Hospitality | 2023 |
| Featherland Limited | Real estate | 2022 |
| Featherlife Limited | Real estate | 2025 |
| Feathers Hotel (Ludlow) Limited | Hospitality | 1999 |
| Feathers Medical Ltd | Professional & scientific | 2025 |
| Feathers Wellbeing CIC | Education | 2025 |
| Featherstone Care Services Ltd | Health & social care | 2020 |
| Featherstone Education Centre Ltd | Education | 2026 |
| Featherstone Healthcare Ltd | Wholesale & retail | 2024 |
| Featherstone Transport Ltd | Transport & logistics | 2025 |
| Featherstone Wines Limited | Wholesale & retail | 2023 |
| Featherton House Limited | Other services | 2009 |
| Febems Limited | Real estate | 2026 |
| FED Devon Limited | Hospitality | 2024 |
| Federal Estates Property Management Ltd | Real estate | 2019 |
| Federal Exchange Ltd | Financial services | 2008 |
| Fedility Investment Company Limited | Real estate | 2020 |
| Fedz Ltd | Wholesale & retail | 2026 |
| Feed DA Ducks Ltd | Wholesale & retail | 2024 |
| Feed My Creative CIC | Manufacturing | 2018 |
| Feed the Poor | Health & social care | 1986 |
| Feed Your Head Music Limited | Arts & recreation | 2008 |
| Feeding the World Global Ltd | Hospitality | 2026 |
| Feeding the World Ltd | Wholesale & retail | 2017 |
| Feedtrain UK Ltd | Wholesale & retail | 2026 |
| Feeha Capital Limited | Financial services | 2022 |
| Feel @ Home 24HOURS Limited | Administrative & support | 2017 |
| Feellife Ltd | Extraterritorial | 2014 |
| Feenix Fabs Limited | Manufacturing | 1999 |
| Feenone Limited | Hospitality | 2022 |
| Feet First (Birmingham) Ltd | Health & social care | 2012 |
| Feet for Rest Limited | Health & social care | 2023 |
| Feetandbeautymed Limited | Health & social care | 2014 |
| Feexphonerepair Limited | Other services | 2020 |
| Fegan Electrical Services Ltd | Construction | 2019 |
| Fehnui Ltd | Real estate | 2025 |
| Fehrer Great Britain Ltd | Manufacturing | 1973 |
| FEI CUI Limited | Hospitality | 2023 |
| FEI LIU Fine Jewellery Ltd | Wholesale & retail | 2010 |
| Feida UK Limited | Transport & logistics | 2025 |
| Feldspar Residents Management Company Limited | Real estate | 2016 |
| Felicia Style Ltd | Wholesale & retail | 2026 |
| Felicity and More Ltd | Professional & scientific | 2022 |
| Felineum Consulting Ltd | Information & communication | 2022 |
| Felix L. UK Property Limited | Real estate | 2021 |
| Felix Services Ltd | Construction | 2025 |
| Fellows Auctioneers Limited | Other services | 2014 |
| Fellows Construct Ltd | Construction | 2022 |
| Fellows Speed Shop Ltd | Wholesale & retail | 2011 |
| Felton & Co. Limited | Professional & scientific | 1995 |
| Felton Consult Limited | Professional & scientific | 2013 |
| Feltons (Bham) Limited | Professional & scientific | 2004 |
| Feltons Holdings Limited | Financial services | 2017 |
| Felyx Asset Management Limited | Real estate | 2016 |
| Felyx Capital Limited | Real estate | 2013 |
| Felyx Holding Limited | Financial services | 2023 |