| Frontida Medics Ltd | Health & social care | 2024 |
| Frontida Services Ltd. | Other services | 2015 |
| Frontier Nexus Limited | Information & communication | 2025 |
| Frontline Business Services Ltd | Real estate | 2024 |
| Frontline Defenders Limited | Administrative & support | 2023 |
| Frontline Housing Ltd | Transport & logistics | 2025 |
| Frontline Shopfitters Limited | Construction | 2009 |
| Frostpixel Limited | Information & communication | 2025 |
| Froth UP Limited | Hospitality | 2024 |
| FRS Construction Ltd | Construction | 2022 |
| Frugal Furnishings Ltd | Wholesale & retail | 2025 |
| Fruit BOY Ltd | Wholesale & retail | 2024 |
| Fruit Monk Ltd | Hospitality | 2026 |
| Fruitandvegetableslaboieru Ltd | Wholesale & retail | 2024 |
| Fruits for Futures CIC | Health & social care | 2025 |
| Fruvibe Ltd | Manufacturing | 2025 |
| FRY Away Chicken Ltd | Hospitality | 2023 |
| FRY ME Crazy Limited | Hospitality | 2025 |
| FSA Holdings Ltd | Financial services | 2020 |
| FSB Stores Ltd | Wholesale & retail | 2026 |
| FSG Consulting Services Limited | Administrative & support | 2018 |
| FSR Trading Limited | Professional & scientific | 1997 |
| Fsss Kitchenware and House Hold Ltd | Wholesale & retail | 2024 |
| FT Enterprises London Limited | Wholesale & retail | 2012 |
| FT Investments LLP | | 2019 |
| FT Media London Group Limited | Other services | 2017 |
| FT Transport Solutions Limited | Transport & logistics | 2012 |
| FTA Ventures Ltd | Construction | 2016 |
| Ftkm UK Limited | Wholesale & retail | 2025 |
| FTM Associates Ltd | Wholesale & retail | 2013 |
| FTM PR Management UK Ltd | Professional & scientific | 2026 |
| FTS First Tech Solutions Limited | Administrative & support | 2011 |
| Fubalon Limited | Real estate | 2018 |
| Fubo Trading Ltd | Wholesale & retail | 2025 |
| Fuel & Nourish Ltd | Hospitality | 2026 |
| Full Circle Cars Limited | Transport & logistics | 2022 |
| Full Flava Limited | Other services | 2002 |
| Full Foods Ltd | Manufacturing | 2024 |
| Full Moon International Ltd | Wholesale & retail | 2025 |
| Full Score Limited | Other services | 2001 |
| Full Substance Ltd | Information & communication | 2021 |
| Fullcircle IT Services Ltd | Information & communication | 2013 |
| Fullfield Optical Ltd | Health & social care | 2021 |
| Fullfitz Limited | Construction | 2025 |
| Fulloaks Care Services Ltd | Health & social care | 2022 |
| Fullwell Enterprises Ltd | Real estate | 2025 |
| Fullwell Properties Ltd | Real estate | 2025 |
| FUN Factory 99 Ltd | Wholesale & retail | 2025 |
| FUN With PAN Ltd | Hospitality | 2024 |
| Fundingconnect Ltd | Information & communication | 2012 |
| Funesp Technology Ltd | Wholesale & retail | 2025 |
| Funky Haddock Ltd | Hospitality | 2020 |
| Funky Pheasant Boutique Limited | Wholesale & retail | 2026 |
| Funstep Limited | Information & communication | 2014 |
| Furnesia Ltd | Wholesale & retail | 2025 |
| Furni Depo Ltd | Wholesale & retail | 2026 |
| Furniture Fleet Limited | Wholesale & retail | 2008 |
| Furniture Outlet London Bespoke Limited | Wholesale & retail | 2025 |
| Furniture Outlet London Deliveries Furniture Limited | Wholesale & retail | 2025 |
| Furniture Outlet London Suppliers Limited | Wholesale & retail | 2025 |
| Furo.Store Limited | Wholesale & retail | 2025 |
| Fusion Builders Ltd | Construction | 2024 |
| Fusion Cars Ltd | Wholesale & retail | 2025 |
| Fusion Center Ltd | Manufacturing | 2024 |
| Fusion Exclusive Limited | Hospitality | 2014 |
| Fusion Flavours by TEE Ltd | Hospitality | 2023 |
| Fusion Food Ilford Ltd | Wholesale & retail | 2019 |
| Fusion Print Solutions Ltd | Administrative & support | 2009 |
| Fusion Stone Limited | Extraterritorial | 2021 |
| Fusion Turkish Ltd | Hospitality | 2019 |
| Fusionexperience Limited | Information & communication | 2007 |
| Fusionnfoods Limited | Hospitality | 2025 |
| Future 4 Ltd | Wholesale & retail | 2012 |
| Future Carpentry Ltd | Construction | 2017 |
| Future Champions | | 1997 |
| Future Doctors Academy Ltd | Education | 2025 |
| Future Exams Ltd | Education | 2026 |
| Future Falcon Security Ltd | Administrative & support | 2022 |
| Future Fluency Limited | Information & communication | 2021 |
| Future Green Home Ltd | Administrative & support | 2012 |
| Future Horizon Care Ltd | Health & social care | 2023 |
| Future Letting House Ltd | Real estate | 2020 |
| Future Media Network Limited | Information & communication | 2017 |
| Future Methods Limited | Financial services | 1995 |
| Future of Africa Limited | Financial services | 2019 |
| Future Point Ltd | Education | 2020 |
| Future Professional Training Limited | Education | 2020 |
| Future Ride Executive Ltd | Administrative & support | 2026 |
| Future Tech Groups Ltd | Administrative & support | 2021 |
| Future Tech Mobiles and Accessories Limited | Wholesale & retail | 2021 |
| Future Training Centre Ltd | Education | 2012 |
| Future United Ltd | Financial services | 2023 |
| Futurebridge Consultancy Ltd | Education | 2025 |
| Futurebuilds Property Development Ltd | Construction | 2026 |
| Futureents | Administrative & support | 2022 |
| Futurefield IT Solutions Ltd | Information & communication | 2020 |
| Futureme Ltd | Information & communication | 2025 |
| Futuretech Inc Ltd | Wholesale & retail | 2024 |
| Futuretechies Hub Private Ltd | Education | 2026 |
| Futuria-Ai Ltd | Financial services | 2025 |