| Excalibur Building Contractors Limited | Construction | 2018 |
| Excel Shoe Repairs Ltd | Other services | 2020 |
| Executive Facilities Limited | Administrative & support | 1965 |
| Exeme Limited | Information & communication | 2026 |
| Experia Holdings Limited | Financial services | 2026 |
| Experience AV Limited | Administrative & support | 2009 |
| Expert Freedom Ltd | Information & communication | 2018 |
| Expert Media Partners Holdings Limited | Other services | 2018 |
| Expert Media Partners Limited | Professional & scientific | 2014 |
| Expert-Hr Limited | Professional & scientific | 2011 |
| Exportshaw Limited | Wholesale & retail | 1987 |
| Express Solutions Group Limited | Construction | 2014 |
| Expresso Property (Pacific Quay) Limited | Construction | 2018 |
| Expro Vehicles Limited | Wholesale & retail | 2025 |
| EYE Noor Ltd | Other services | 2012 |
| Eymert Limited | Other services | 2025 |
| Eyot Developments Limited | Real estate | 1992 |
| Ezee GEE Music Limited | Arts & recreation | 2017 |
| Ezi-Hhh Rugby Ltd | Real estate | 2022 |
| F J Samuely and Partners Limited | Professional & scientific | 2000 |
| F&D Investments Ltd | Real estate | 2014 |
| F&G Associates Limited | Construction | 2019 |
| F. Bullett & Co. Limited | Manufacturing | 1996 |
| F.E. Boughton Limited | Hospitality | 1964 |
| F11 Workshops Limited | Professional & scientific | 2020 |
| Faaria Kenny Studio Ltd | Professional & scientific | 2025 |
| FAB Solutions Limited | Information & communication | 2000 |
| Fable & Fang Limited | Wholesale & retail | 2020 |
| Face Weybridge Ltd | Other services | 2018 |
| Fahad Limited | Real estate | 2009 |
| Fair Advice Consultants Ltd | Education | 2026 |
| Fairacre Estate Limited | Households | 1984 |
| Fairview Vehicle Solutions Ltd | Wholesale & retail | 2019 |
| Falcon and Stone Ltd | Professional & scientific | 2024 |
| Falcon Electrical Limited | Construction | 1991 |
| FAR East & Co Limited | Administrative & support | 2011 |
| Farah CFO Limited | Professional & scientific | 2015 |
| Farnell Mews Flats Management Limited | Households | 2015 |
| Farringford Consulting Limited | Professional & scientific | 2023 |
| Fast Motion Media Limited | Information & communication | 2022 |
| Fastcarlocksmith Ltd | Manufacturing | 2021 |
| Fastforwardfx Limited | Information & communication | 2018 |
| Fastnet Solar 2020 Limited | Energy | 2020 |
| Favo Coffee Limited | Hospitality | 2025 |
| FC JB Co Limited | Administrative & support | 2010 |
| Feast and Quench Limited | Information & communication | 2019 |
| Feerie Ltd | Wholesale & retail | 2024 |
| Fego Limited | Professional & scientific | 2017 |
| Fence Bidco Limited | Professional & scientific | 2015 |
| Fence Holdco Limited | Professional & scientific | 2015 |
| Fence Midco Limited | Professional & scientific | 2015 |
| Fence Topco Limited | Professional & scientific | 2015 |
| Ferndore Limited | Professional & scientific | 2026 |
| Fernlow Limited | Financial services | 2021 |
| Fertilitae Limited | Health & social care | 2020 |
| Ferwood Limited | Real estate | 2010 |
| Fetch & Friends Pet Services Limited | Other services | 2025 |
| Fetch ME Later Ltd | Other services | 2026 |
| Fhit Ltd | Information & communication | 2023 |
| Fides Consulting Limited | Professional & scientific | 2012 |
| Fiducia Supporting Services Limited | Professional & scientific | 2019 |
| Field Network Services Limited | Financial services | 2019 |
| Field Property Partners Ltd | Real estate | 2026 |
| Fifthtrill Limited | Real estate | 2025 |
| Fifty Five Mount Harry Road Management Co Ltd | Households | 2021 |
| FIG Tree Solutions Limited | Information & communication | 2019 |
| Fiinu 2 Limited | Information & communication | 2020 |
| Fiinu Holdings Limited | Financial services | 2017 |
| Fiinu PLC | Professional & scientific | 2003 |
| Fiinu Services Ltd | Information & communication | 2020 |
| Filiotech Limited | Other services | 2016 |
| Film RF Ltd | Information & communication | 2019 |
| Filmsfx Limited | Information & communication | 2022 |
| Filzi Limited | Wholesale & retail | 2024 |
| Financial Wellness Tracker Ltd | Information & communication | 2025 |
| Financially Speaking Limited | Financial services | 2003 |
| Finchlea Estates Limited | Real estate | 1999 |
| Finchlea Holdings Limited | Professional & scientific | 1999 |
| Finchlea Investments Limited | Construction | 1994 |
| Find a Podcast Guest Limited | Information & communication | 2025 |
| Find Focus Limited | Information & communication | 2012 |
| Fine Food Traders Limited | Hospitality | 2018 |
| Fine Foods Lanka (UK) Limited | Wholesale & retail | 2024 |
| Fine Point Services Ltd | Professional & scientific | 2024 |
| Finejoan Limited | Real estate | 2020 |
| Finetaste Ltd | Extraterritorial | 2009 |
| Finexco Ltd | Professional & scientific | 2025 |
| Finlay FOX Limited | Financial services | 2024 |
| Finsbury Infrastructure Holdings 2 Ltd | Construction | 2025 |
| Finsbury Infrastructure Holdings Limited | Financial services | 2024 |
| Finsbury Infrastructure Services UK Ltd | Construction | 2024 |
| Finterest Ltd | Professional & scientific | 2022 |
| Fircroft Estates Limited | Real estate | 2007 |
| Fire Safety Matters Ltd | Administrative & support | 1984 |
| Fireco Partners Limited | Professional & scientific | 2018 |
| Firepro (UK) Ltd | Wholesale & retail | 2011 |
| Firfields Roads Limited | Real estate | 2024 |
| Firlands Residents Management Company Limited | Households | 2017 |
| First Cape Limited | Administrative & support | 2003 |
| First Consultancy Limited | Administrative & support | 2010 |