| FSG (Elthorne) Developments Limited | Construction | 2024 |
| FSG (Five) Limited | Construction | 2024 |
| FSG (Four) Limited | Construction | 2024 |
| FSG (South) Limited | Construction | 2021 |
| FSG Bolton Moor Lane Developments (One) Limited | Construction | 2022 |
| FSG Moor Lane Bolton Developments Limited | Construction | 2021 |
| FSG Southway Ryebank Developments Limited | Construction | 2020 |
| Fshe Properties Ltd | Real estate | 2026 |
| FSI Commerce Ltd | Wholesale & retail | 2026 |
| FSJ Electrical Services Ltd | Construction | 2019 |
| FSL Beauty Ltd | Wholesale & retail | 2025 |
| FSL International Limited | Wholesale & retail | 2018 |
| FSL Properties Ford Lane Limited | Real estate | 2011 |
| FSM Global Limited | Wholesale & retail | 2025 |
| Fsnd Homes Ltd | Households | 2018 |
| FSQ Conformity Ltd | Professional & scientific | 2019 |
| FSR Solicitors Limited | Professional & scientific | 2017 |
| FSS Clinical Research Limited | Professional & scientific | 2004 |
| FST Farm Ltd | Agriculture & fishing | 2026 |
| FST Logistics Ltd | Transport & logistics | 2026 |
| FST Management Ltd | Professional & scientific | 2024 |
| FST Media Rights Limited | Administrative & support | 2016 |
| FST Property Ltd | Construction | 2025 |
| Fstc 1 Limited | Real estate | 2020 |
| Fstc Limited | Education | 1999 |
| Fsya Ltd | Hospitality | 2020 |
| FSZ Property Ltd | Real estate | 2016 |
| FT Dent Ltd | Health & social care | 2019 |
| FT Industries Limited | Information & communication | 2017 |
| FT Locums Ltd | Wholesale & retail | 2022 |
| FT MCR Ltd | Wholesale & retail | 2025 |
| Ftaj Projects Ltd | Information & communication | 2025 |
| Ftbi UK Ltd | Construction | 2025 |
| FTC International Education Limited | Education | 2020 |
| FTF Arts CIC | Arts & recreation | 2020 |
| FTI Cleaning Group Ltd | Administrative & support | 2025 |
| FTL Holdings North West Ltd | Wholesale & retail | 2024 |
| FTM Ltd | Hospitality | 2026 |
| Ftml Consultant Ltd | Construction | 2017 |
| Ftnd Ltd | Wholesale & retail | 2025 |
| FTP Healthcare Ltd | Professional & scientific | 2016 |
| FTR Healthcare Ltd | Health & social care | 2015 |
| FTR Ingredients Limited | Administrative & support | 2025 |
| Ftr-Ric Ltd | Transport & logistics | 2025 |
| FTS Electrical Supplies Ltd | Wholesale & retail | 2022 |
| FTS Fmcg Ltd | Wholesale & retail | 2010 |
| FTS International Ltd | Administrative & support | 2026 |
| FTV Drivers Ltd | Administrative & support | 2026 |
| Ftw-International Ltd | Agriculture & fishing | 2022 |
| FTX BTL Limited | Real estate | 2024 |
| FTZ Sports Ltd | Education | 2018 |
| FU EN Limited | Wholesale & retail | 2026 |
| FU Gilbert Ltd | Transport & logistics | 2022 |
| Fuad Fragrances Ltd | Wholesale & retail | 2024 |
| Fubar Mental Health Ltd | Health & social care | 2026 |
| Fucang Brand Commercial Limited | Extraterritorial | 2023 |
| Fuchs Lubritech (UK) Limited | Manufacturing | 1955 |
| Fuchs Lubritech International Limited | Professional & scientific | 2000 |
| Fuchs Online Ltd | Information & communication | 2008 |
| Fuchsiahawk Limited | Real estate | 2025 |
| Fudaf Care Ltd | Health & social care | 2019 |
| Fudwaves Catering Ltd | Hospitality | 2025 |
| Fudwaves Limited | Hospitality | 2023 |
| Fueguia Limited | Wholesale & retail | 2019 |
| Fuel & Tonic Limited | Wholesale & retail | 2025 |
| Fuel Cafe Ltd | Hospitality | 2011 |
| Fuel Shakes Ltd | Hospitality | 2014 |
| Fuel Time Drinks UK Ltd | Manufacturing | 2019 |
| Fuelish Ltd | Hospitality | 2025 |
| Fuelled Car Care Ltd | Manufacturing | 2023 |
| Fuelled Events Limited | Administrative & support | 2008 |
| Fuelled X Ltd | Wholesale & retail | 2024 |
| Fuelwise Limited | Wholesale & retail | 2022 |
| Fugz Official Limited | Information & communication | 2025 |
| Fujiyama Ltd | Hospitality | 2025 |
| Fujtown Investments Ltd | Wholesale & retail | 2023 |
| Fulbourne Road Management Company Limited | Households | 2024 |
| Fulcrm Limited | Professional & scientific | 2017 |
| Fulcrum Hub Ltd | Administrative & support | 2019 |
| Fulcrum Pegasus Viadex Exchange Co Ltd | Financial services | 2023 |
| Fulfilling Care Limited | Health & social care | 2026 |
| Fulfilx Ltd | Transport & logistics | 2023 |
| Full Circle Facility Limited | Administrative & support | 2011 |
| Full Circle Textiles Ltd | Manufacturing | 2019 |
| Full Circle Workplace (Holdings) Ltd | Financial services | 2023 |
| Full Contact Contender Limited | Arts & recreation | 2020 |
| Full Contact Physiotherapy Ltd | Health & social care | 2024 |
| Full Couture Limited | Manufacturing | 2025 |
| Full Force Combat Limited | Professional & scientific | 2025 |
| Full Life Consulting Limited | Professional & scientific | 2010 |
| Full Life Solutions Limited | Professional & scientific | 2019 |
| Full Mind Ltd | Health & social care | 2025 |
| Full Mistica Ltd | Wholesale & retail | 2023 |
| Full Monty Pizza & Kebab Ltd | Hospitality | 2017 |
| Full Moon View Ltd | Hospitality | 2021 |
| Full Motion Physio Ltd | Health & social care | 2015 |
| Full of Fashion Ltd | Wholesale & retail | 2026 |
| Full of Lizards Ltd | Information & communication | 2018 |
| Full Run Merch Limited | Wholesale & retail | 2015 |
| Full Scope Electrical Limited | Construction | 2019 |