| ETA Control Systems Limited | Construction | 2017 |
| ETS Build Ltd | Construction | 2014 |
| Eucto International Ltd | Information & communication | 2024 |
| Eunish Consulting Limited | Professional & scientific | 2017 |
| Evans Heritage Consultants Ltd | Professional & scientific | 2020 |
| Eveneco Limited | Construction | 2025 |
| Everwood Cabins Ltd | Wholesale & retail | 2025 |
| Everybase Ltd | Construction | 2010 |
| Everythingfitness Limited | Wholesale & retail | 2025 |
| Evolvnex Solutions Ltd | Information & communication | 2024 |
| Evoniti Limited | Information & communication | 2012 |
| Excel Telecommunication Limited | Information & communication | 2012 |
| Exemplar Property Solutions Limited | Construction | 2025 |
| Expert Assist Ltd | Information & communication | 2012 |
| Explosive Designs Apparel Ltd | Professional & scientific | 2019 |
| Explosive Learning Solutions Limited | Professional & scientific | 2005 |
| Exprodo Software Limited | Professional & scientific | 2012 |
| Extreme Healthcare Limited | Health & social care | 2020 |
| Fahrenheit 212 Limited | Administrative & support | 2007 |
| Fairflow Energy Ltd | Professional & scientific | 2024 |
| Fama Limited | Professional & scientific | 2022 |
| Farmhouse Pizza Didcot Ltd | Hospitality | 2021 |
| Farrar Investments Limited | Real estate | 2024 |
| Fast Consultancy & Management Limited | Professional & scientific | 2013 |
| Fast F Delivery Ltd | Transport & logistics | 2026 |
| FEB Bros Ltd | Hospitality | 2023 |
| Fedatech Properties Limited | Construction | 2025 |
| Fedora Business Limited | Professional & scientific | 2024 |
| Fenallen Ltd | Information & communication | 2013 |
| Fenn Consulting Limited | Information & communication | 2019 |
| Fenny Nyatsanza Limited | Hospitality | 2021 |
| Ferry RD Ltd | Real estate | 2026 |
| FGC Practice UK Ltd | Health & social care | 2020 |
| Finest Bakery Ltd | Wholesale & retail | 2023 |
| Fingers and Forks Events Ltd | Hospitality | 2013 |
| Finsight Systems Ltd | Information & communication | 2025 |
| Fintech Boostup Ltd | Information & communication | 2024 |
| Finverse Technologies Ltd | Information & communication | 2025 |
| First Class Fabrication Ltd | Manufacturing | 2022 |
| First Phoenix (FCP) Ltd | Professional & scientific | 2010 |
| Firstclass Training Limited | Professional & scientific | 2009 |
| Fitness & Wellbeing Hub Ltd | Arts & recreation | 2020 |
| Fives Stein Limited | Professional & scientific | 1993 |
| FIX & Point Limited | Construction | 2020 |
| FIX Survey Limited | Professional & scientific | 2021 |
| Fixing-Talent Ltd | Administrative & support | 2026 |
| Fjakhan Ltd | Hospitality | 2024 |
| Fleet Roofing and Scaffolding Services Ltd | Construction | 2020 |
| Fleet Way 1967 Limited | Extraterritorial | 2014 |
| Fleur DE LYS Limited | Hospitality | 2024 |
| Flippa Interiors Ltd | Professional & scientific | 2021 |
| Florena T Ltd | Financial services | 2024 |
| Fluxsyn Ltd | Manufacturing | 2025 |
| Flyingcolors Ltd | Real estate | 2025 |
| FMG Assets Ltd | Real estate | 2026 |
| Food on the Park Ltd | Hospitality | 2017 |
| Force Cars Limited | Wholesale & retail | 2009 |
| Ford Matthews Ltd | Professional & scientific | 2017 |
| Forest Legacy Limited | Real estate | 2024 |
| Formbar Limited | Wholesale & retail | 2004 |
| Forster Medwriting Ltd | Professional & scientific | 2025 |
| Fortis Security and Protection Limited | Administrative & support | 2010 |
| Forward Curve Limited | Financial services | 2007 |
| Four Future International Limited | Real estate | 2020 |
| Fourapps Healthcare Ltd | Professional & scientific | 2021 |
| Fourtythree Oxford Street Ltd | Real estate | 2025 |
| Foxhall (Didcot) Limited | Real estate | 2019 |
| Frasers Retail Limited | Wholesale & retail | 2011 |
| French Thewlis Ltd | Professional & scientific | 2013 |
| Fresh Palette Ltd | Real estate | 2015 |
| Friarn Apartments Ltd | Real estate | 2014 |
| From London With LUX Ltd | Wholesale & retail | 2025 |
| FS Bookeeping and Accounting Services Ltd | Professional & scientific | 2018 |
| Fsne Investments Ltd | Real estate | 2025 |
| Full Funnel PR Limited | Professional & scientific | 2025 |
| Fullstack Trading Ltd | Wholesale & retail | 2024 |
| FUNCTION2GROW Ltd | Health & social care | 2019 |
| Future Delivery Ltd | Transport & logistics | 2025 |
| Futuro Consulting and Investments Ltd | Professional & scientific | 2019 |
| FX Forums Ltd | Extraterritorial | 2010 |
| G&L Tyler Limited | Administrative & support | 2013 |
| G&R Collins Construction Ltd | Construction | 2011 |
| G.E.M. Carpentry Solutions Limited | Manufacturing | 2020 |
| G4G TGS Ltd | Professional & scientific | 2025 |
| G60 Limited | Construction | 2025 |
| Galpin Benton IV Ltd | Real estate | 2026 |
| Ganicore Ltd | Information & communication | 2026 |
| Gannon Sports Therapy Ltd | Arts & recreation | 2023 |
| Garden Close (Didcot) Limited | Households | 1994 |
| Gareth Clark Hair for MEN (Wallingford) Ltd | Extraterritorial | 2020 |
| Gareth Clark Hair for MEN Ltd | Other services | 2013 |
| Gareth Davies Composite Trimmer Limited | Manufacturing | 2023 |
| Garko Resources UK Ltd | Manufacturing | 2024 |
| Garner ADR Logistics Ltd | Transport & logistics | 2015 |
| GB Guitar Shows Ltd | Administrative & support | 2025 |
| GB Short Lets Ltd | Administrative & support | 2023 |
| GC Property Sourcing Ltd | Administrative & support | 2025 |
| Gees Estates Ltd | Real estate | 2023 |
| General Baptist Association of the New Connexion (the) | Other services | 1885 |
| George Maciak Limited | Construction | 2002 |