| FM Fashion Ltd | Manufacturing | 2020 |
| FM First Associates Limited | Real estate | 2024 |
| FM Hospitality Limited | Arts & recreation | 2025 |
| FM Resourcing Ltd | Transport & logistics | 2011 |
| FMA Enterprises Limited | Real estate | 2012 |
| Fman Technical Ltd | Professional & scientific | 2026 |
| FMK Autos Ltd | Professional & scientific | 2025 |
| FMK Investments Ltd | Financial services | 2015 |
| Fmlr Limited | Health & social care | 2010 |
| FMR Services Limited | Information & communication | 2018 |
| Fmrt Ltd | Construction | 2024 |
| FMY Clinical Ltd | Health & social care | 2025 |
| FNA Property Limited | Real estate | 2023 |
| Fnam Ltd | Financial services | 2018 |
| Fnbc Training Academy (Birmingham) Ltd | Education | 2024 |
| Fnbc Training Academy Ltd | Education | 2007 |
| FNC Clothing Ltd | Manufacturing | 2025 |
| FND Online Ltd | Wholesale & retail | 2017 |
| Fnl+B Sports ED Community Interest Company | Education | 2023 |
| FNR Accountants Ltd | Professional & scientific | 2025 |
| FNZ Investments Limited | Real estate | 2025 |
| Foam Place Leicester Limited | Wholesale & retail | 2014 |
| Foba Care Services Ltd | Administrative & support | 2021 |
| Foblit Limited | Wholesale & retail | 2016 |
| FOC Holdings Ltd | Administrative & support | 2025 |
| Focal Forwards Ltd | Health & social care | 2018 |
| Focal Tax Solutions Ltd | Professional & scientific | 2025 |
| Focale Specialist Projects Limited | Construction | 2021 |
| Focus Charity | Education | 1998 |
| Focus Creative Services Limited | Professional & scientific | 2026 |
| Focus Property Sales & Management Ltd | Real estate | 2022 |
| FOCUS28 Limited | Professional & scientific | 2020 |
| Fodderstone Elite Ltd | Transport & logistics | 2014 |
| Foflo Ltd | Professional & scientific | 2020 |
| Fogap Consulting Ltd | Information & communication | 2015 |
| Fogarty Holdings Limited | Administrative & support | 2001 |
| Foken Ltd | Information & communication | 2021 |
| Fokse Designs Limited | Wholesale & retail | 2024 |
| Foldypac UK Limited | Professional & scientific | 2000 |
| Folk Touch Boliya Record Ltd | Arts & recreation | 2025 |
| Folkesworth Ability Ltd | Transport & logistics | 2015 |
| Follicco Ltd | Wholesale & retail | 2026 |
| Folly-Yem Systems Limited | Wholesale & retail | 2023 |
| Foltex Limited | Extraterritorial | 1982 |
| Folworth Ltd | Health & social care | 2013 |
| Fondjo Healthcare Ltd | Health & social care | 2022 |
| Fondue Limited | Information & communication | 1995 |
| Fone Booth (Midlands) Limited | Wholesale & retail | 2018 |
| Fone Studio Limited | Wholesale & retail | 2005 |
| FONES360 Limited | Wholesale & retail | 2026 |
| Fonfi Trans Ltd | Transport & logistics | 2017 |
| Fong FAR Thai Spa Ltd | Health & social care | 2020 |
| Fonix AV Solutions Limited | Administrative & support | 2019 |
| Fonston Ability Ltd | Manufacturing | 2014 |
| Fontane Briggs Ltd | Wholesale & retail | 2025 |
| Fonteyn Ltd | Wholesale & retail | 2022 |
| Fonyo Limited | Information & communication | 2017 |
| Food & Shelter Foundation | Health & social care | 2002 |
| Food 4 U Grocers Limited | Wholesale & retail | 2019 |
| Food 4 U Leicester Limited | Wholesale & retail | 2023 |
| Food Attraction Limited | Manufacturing | 2013 |
| Food Fantasia Leicester Ltd | Hospitality | 2024 |
| Food for Thought Coaching & Consulting Limited | Professional & scientific | 2024 |
| Food Lounger Limited | Wholesale & retail | 2019 |
| Food Maths Ltd | Hospitality | 2021 |
| Food Must Limited | Hospitality | 2019 |
| Food Orders Ltd | Hospitality | 2025 |
| Food Routes Ltd | Arts & recreation | 2021 |
| Food Service Hub Ltd | Wholesale & retail | 2025 |
| Food Souq Limited | Wholesale & retail | 2024 |
| Food Technical Support Services Ltd | Hospitality | 2012 |
| Food Times Leicester Ltd | Hospitality | 2018 |
| Foodelo Limited | Wholesale & retail | 2019 |
| Foodess Limited | Hospitality | 2025 |
| Foodiess Hyderabad Kitchen Limited | Hospitality | 2023 |
| Foodsafe Maintenance Ltd | Manufacturing | 2026 |
| Foolat Investments Ltd | Professional & scientific | 2017 |
| Football and Fitness Clubs Limited | Arts & recreation | 2014 |
| Football and Fitness Futures Limited | Arts & recreation | 2018 |
| Football and Fitness Limited | Administrative & support | 2014 |
| Football Club Iannis CIC | Arts & recreation | 2023 |
| Football Remixed Group Ltd | Arts & recreation | 2021 |
| Footballforall C.I.C. | Arts & recreation | 2025 |
| FOR Building Ltd | Construction | 2024 |
| FOR Digital Sakes Ltd | Professional & scientific | 2020 |
| Force Construct Ltd | Construction | 2010 |
| Ford & Slater (Leyland DAF) Trust Limited | Professional & scientific | 1992 |
| Ford & Slater Limited | Wholesale & retail | 1990 |
| Fordham Marketing Ltd | Information & communication | 2022 |
| Fords Transport Ltd | Transport & logistics | 2013 |
| Foreign Property Experts Limited | Real estate | 2019 |
| Foremetric Ltd | Information & communication | 2023 |
| Foremost Intelligence & Automation Ltd | Administrative & support | 2023 |
| Foresight Analytics Limited | Information & communication | 2022 |
| Foresight Partners Ltd | Real estate | 2023 |
| Forest Carpentry and Building Services Ltd | Manufacturing | 2019 |
| Forest East OFF Licence Ltd | Wholesale & retail | 2025 |
| Forest Flow Trade Ltd | Wholesale & retail | 2024 |
| Forest Gate Homes Ltd | Construction | 2023 |
| Forest Gate Ltd | Real estate | 2018 |