| Extendable Well Commodity Limited | Wholesale & retail | 2017 |
| Extle Solutions Limited | Professional & scientific | 2016 |
| Extra Potash Ltd | Agriculture & fishing | 2021 |
| Extrabuild Holding Company Limited | Professional & scientific | 2022 |
| Extrabuild Limited | Construction | 2016 |
| Extreme Expedition Tours Limited | Administrative & support | 2022 |
| Extreme Instrumentation Limited | Professional & scientific | 2007 |
| Extremophilegear Limited | Manufacturing | 2017 |
| Exuberant Clouds Invest Ltd | Financial services | 2018 |
| Exue International Ltd | Education | 2018 |
| Exvom Ltd | Real estate | 2026 |
| Exylon Aerospace Ltd | Manufacturing | 2024 |
| Eyba Ltd | Wholesale & retail | 2026 |
| EYE in the Skies Limited | Professional & scientific | 2024 |
| EYE SEE Social Ltd | Information & communication | 2017 |
| EYE Time Ltd | Wholesale & retail | 2018 |
| Eyebright Consulting Ltd | Other services | 2021 |
| Eyesea Green Limited | Administrative & support | 2022 |
| Eyespan Limited | Information & communication | 2009 |
| EYMEN24 Ltd | Real estate | 2024 |
| Ezka Foods Ltd | Hospitality | 2026 |
| EZT Solutions Limited | Information & communication | 2024 |
| F & H Homes Limited | Construction | 2010 |
| F Ltd | Extraterritorial | 2021 |
| F M Instruments Limited | Manufacturing | 2007 |
| F&E Logistics Ltd | Transport & logistics | 2015 |
| F&L Roofing Limited | Construction | 2025 |
| F&P Logistics Ltd | Wholesale & retail | 2017 |
| F-Star Therapeutics Limited | Professional & scientific | 2018 |
| F.A.F Property Investment Ltd | Real estate | 2024 |
| F.C. Butler & Sons Limited | Agriculture & fishing | 1960 |
| F.Cravo Engineering Ltd | Manufacturing | 2026 |
| F.H. Investments Limited | Real estate | 2007 |
| F.Instituut Limited | Professional & scientific | 2021 |
| F.O.L Design Ltd | Construction | 2017 |
| F.R.P.D Ltd | Real estate | 2006 |
| F.W.Deptford(Over)Limited | Agriculture & fishing | 1952 |
| F1 Garacing Ltd | Manufacturing | 2026 |
| FA & J Ltd | Construction | 2014 |
| FA Catering Limited | Hospitality | 2019 |
| FA Fruitage Ltd | Real estate | 2024 |
| Faber Sanitation Co., Ltd | Manufacturing | 2024 |
| Fabios Logistics Ltd | Transport & logistics | 2024 |
| Fable Games Limited | Information & communication | 2025 |
| Fabric First Limited | Construction | 2025 |
| Fabricform Ltd | Manufacturing | 2018 |
| Fabulang Ltd | Information & communication | 2025 |
| Fabulook Fitness UK Limited | Arts & recreation | 2025 |
| Facialfocus Surgical Group Ltd | Health & social care | 2024 |
| Facilities Support Consultancy Limited | Professional & scientific | 2002 |
| Facility Innovators Ltd | Education | 2011 |
| Fact- Finder (UK) Limited | Information & communication | 2014 |
| Factory Motorsport Ltd | Manufacturing | 2025 |
| Factotum Limited | Administrative & support | 2002 |
| Facu China Import and Export Co., Ltd | Wholesale & retail | 2023 |
| Facundo Helicopters Ltd | Manufacturing | 2023 |
| Faerch Ukco I Limited | Manufacturing | 2008 |
| Fair Curator Ltd | Information & communication | 2018 |
| Fair Street Management Limited | Real estate | 1997 |
| Fair Trade Gemstones Limited | Mining & quarrying | 2007 |
| Fairfield Homes Limited | Construction | 2008 |
| Fairford Management Company Limited | Households | 1986 |
| Fairhaven Property (Cambridge) Limited | Real estate | 2021 |
| Fairhill Holdings Ltd | Financial services | 2025 |
| Fairlawns Racing Limited | Agriculture & fishing | 2018 |
| Fairlead Consulting Ltd | Professional & scientific | 2025 |
| Fairmount Weather Systems Ltd | Manufacturing | 2002 |
| Fairview Capital Group Ltd | Financial services | 2019 |
| Fairways Consultants Limited | Information & communication | 2017 |
| Fairy Trove Limited | Wholesale & retail | 2025 |
| Fairylandz Health Care Limited | Health & social care | 2023 |
| Faith in Business Limited | Education | 2019 |
| Faith Transport Limited | Transport & logistics | 2015 |
| Faithlove Limited | Health & social care | 2021 |
| FAL Foundation | Extraterritorial | 2020 |
| Falcon IT Services Limited | Information & communication | 2015 |
| Falcon Printing Services Limited | Manufacturing | 2008 |
| Fallan 42 Holding Company Limited | Financial services | 2024 |
| Fallbeam Capital Limited | Financial services | 2019 |
| Fallowfields Media Communication Ltd | Other services | 2016 |
| Falls Bridge Cheverny UK Limited | Financial services | 2023 |
| Falmouth Flexible Ltd | Education | 2016 |
| Famali Property Ltd | Real estate | 2025 |
| Family Osteopathy Limited | Health & social care | 2005 |
| Familya Care Services Cambridgeshire Ltd | Health & social care | 2024 |
| Famiz Consulting Ltd | Professional & scientific | 2026 |
| Fampdf Limited | Information & communication | 2021 |
| FAN Engeneering Limited | Construction | 2023 |
| Fancy Global Co., Ltd | Information & communication | 2025 |
| Fangshuren Limited | Information & communication | 2025 |
| Fanhams Grange Property Management Company Limited | Households | 1993 |
| Fantasist Ltd | Information & communication | 2021 |
| Fantastic Partners Limited | Arts & recreation | 2012 |
| Fantastico Fans UK Limited | Manufacturing | 2025 |
| Fantell Ltd | Arts & recreation | 2026 |
| Fanyspeedair Ltd | Manufacturing | 2024 |
| Fapapo Co., Ltd | Manufacturing | 2022 |
| Faraday Motors Ltd | Manufacturing | 2021 |
| Faraday Predictive Limited | Professional & scientific | 2017 |
| Farboudaville Limited | Real estate | 2024 |