| Excel Painting Contractors Limited | Construction | 2016 |
| Exclusive Car Network Ltd | Wholesale & retail | 2021 |
| Executive Lettings Limited | Real estate | 2011 |
| Executive Property Sales Ltd | Real estate | 2025 |
| Executive Stays Limited | Real estate | 2021 |
| Executive Stretch Limited | Administrative & support | 2006 |
| Expert Interactive Limited | Information & communication | 2005 |
| Explore Independence Ltd | Health & social care | 2012 |
| Explore Pathways Support Ltd | Health & social care | 2022 |
| Explore UK Estate Investments Ltd | Real estate | 2020 |
| Express Taverns Limited | Hospitality | 2014 |
| Expressionate Limited | Real estate | 2022 |
| Extra PUB Company Limited | Hospitality | 2020 |
| Extractor FAN Repair Ltd | Manufacturing | 2024 |
| Eyaz Properties Ltd | Real estate | 2023 |
| EYE Level Media Ltd | Professional & scientific | 2023 |
| EZ Security Services Ltd | Administrative & support | 2016 |
| F & M Industrial Transport Limited | Transport & logistics | 2018 |
| F J Pinions Ltd | Water & waste | 2021 |
| F R Building Services Limited | Construction | 2012 |
| F R Property Portfolio Limited | Real estate | 2025 |
| F.G.Halladey and Sons,Limited | Wholesale & retail | 1955 |
| FA1 Investment Ltd | Real estate | 2024 |
| Fabulicious Baking School Ltd | Hospitality | 2013 |
| Facade Investments Limited | Financial services | 1999 |
| Facade Maintenance Ltd | Manufacturing | 2024 |
| Face Fit Taxi Limited | Health & social care | 2021 |
| Faces by Megan Academy Limited | Education | 2025 |
| Faces by Megan Limited | Other services | 2021 |
| FAE Social Ltd | Professional & scientific | 2026 |
| Fair Green West Limited | Wholesale & retail | 2007 |
| Fairbairn & Wolf Studio Limited | Wholesale & retail | 2015 |
| Fairbank Property Limited | Real estate | 2022 |
| Fairbanks RD Ltd | Real estate | 2025 |
| Fairfax Drive Developments Limited | Extraterritorial | 2013 |
| Fairlands Management Company Limited | Households | 2005 |
| Fairlawns Management Company (Chingford) Limited | Households | 2007 |
| Fairlopboatsandbikes Ltd | Administrative & support | 2023 |
| Fairmile Technical Ltd | Professional & scientific | 2020 |
| Fairplay Transit Ltd | Transport & logistics | 2023 |
| Fairview Fyefield Limited | Construction | 2023 |
| Fairytale Studios Ltd | Arts & recreation | 2025 |
| Fall Global Ltd | Administrative & support | 2014 |
| Fall Press Limited | Administrative & support | 2009 |
| Falla UK Limited | Administrative & support | 2023 |
| Fanoperience Limited | Administrative & support | 2019 |
| Faoz Ltd | Wholesale & retail | 2026 |
| FAR Group for Investment Limited | Wholesale & retail | 2025 |
| FAR Queue Ltd | Arts & recreation | 2020 |
| Fareedom of Exchange Ltd | Information & communication | 2025 |
| Fareedom of Work Ltd | Wholesale & retail | 2024 |
| Farooq & Sons Limited | Wholesale & retail | 2025 |
| Fast and Clean Pest Control Services Limited | Administrative & support | 2026 |
| FAT FOX Desserts Ltd | Hospitality | 2025 |
| Fawn Heights Management Company Limited | Real estate | 2014 |
| Fawnmaster Limited | Real estate | 1996 |
| Faylands Medical Services Limited | Health & social care | 2010 |
| Fcll Developments Ltd | Construction | 2026 |
| Fdldn Limited | Construction | 2021 |
| Fearne Ltd | Professional & scientific | 2017 |
| Felcon Blackheath Ltd | Real estate | 2015 |
| Fellows MC Limited | Professional & scientific | 2009 |
| Felwins Limited | Information & communication | 2020 |
| Females in the Fleet Limited | Transport & logistics | 2024 |
| Fentoncharley Services Limited | Other services | 2025 |
| Fergo Fine Jewellery Limited | Wholesale & retail | 2023 |
| Ferguson's Wharf (Blocks A,B) Management Company Limited | Households | 1996 |
| Fern Anderson Interiors Ltd | Other services | 2016 |
| Ferreira Marino Ltd | Construction | 2013 |
| Fewdog Ltd | Professional & scientific | 2024 |
| FHP Heating Limited | Construction | 2024 |
| FI Tutors Maths Ltd | Education | 2024 |
| FIB Films Limited | Information & communication | 2021 |
| Fibonacci Solutions Ltd. | Information & communication | 2018 |
| Fidus Capital Ventures Limited | Professional & scientific | 2026 |
| Field Logistics Ltd | Professional & scientific | 2012 |
| Fieldfind Limited | Construction | 2000 |
| Fielding Court (the Uplands) Management Company Limited | Other services | 2011 |
| Fifth Finance Ltd | Other services | 2011 |
| Fight IT OUT Ltd | Education | 2023 |
| Fight Pride Ltd | Information & communication | 2024 |
| Fikr Corp Ltd | Wholesale & retail | 2026 |
| Filbert Press Limited | Information & communication | 2015 |
| Film Games Ltd | Information & communication | 2025 |
| Film Unit Cars.Com Limited | Transport & logistics | 2000 |
| FIN and FLO Trading Limited | Financial services | 2015 |
| Finahomes Ltd | Real estate | 2026 |
| Finance Director Smes Limited | Professional & scientific | 2019 |
| Financial Claim Legal Services Limited | Administrative & support | 2008 |
| Finarb Properties Ltd | Real estate | 2025 |
| Finchfields Limited | Construction | 2014 |
| Finchley (Holdings) Limited | Real estate | 1990 |
| Finchley Lending Solutions Limited | Financial services | 2018 |
| Finchley Road (Smiths) Limited | Administrative & support | 2008 |
| Find a Trader Sevices Ltd | Construction | 2023 |
| Find Whats Wrong Limited | Information & communication | 2021 |
| Fineros Ltd | Real estate | 2022 |
| Finesse Flare Ltd | Professional & scientific | 2022 |
| Finest Catering Ltd | Hospitality | 2016 |
| Finisterre Hold Co Limited | Financial services | 2024 |