| Executive Transport Ltd | Transport & logistics | 2021 |
| Exegesis Pharma Ltd | Professional & scientific | 2021 |
| Expecting to FLY Consulting Limited | Professional & scientific | 2008 |
| Expensedoc Ltd | Information & communication | 2018 |
| Explosion Digital Ltd | Information & communication | 2018 |
| Exquisite HD Ltd | Education | 2026 |
| Eyetracker Solutions (UK) Limited | Professional & scientific | 2003 |
| FAB & Fair LLP | | 2007 |
| Fairfield Freeholders Limited | Real estate | 2003 |
| Family Lockdown Creations Ltd | Wholesale & retail | 2023 |
| Farm Management Services Limited | Professional & scientific | 2008 |
| Fasth Business Partner Ltd | Professional & scientific | 2019 |
| Faye Cornhill Ltd | Administrative & support | 2023 |
| Fazloe Limited | Real estate | 2023 |
| FEC Heliports Worldwide Ltd | Manufacturing | 2006 |
| Federation Against Software Theft | Information & communication | 1984 |
| Fellowship Group Ltd | Wholesale & retail | 2019 |
| Fertility Solutions Limited | Health & social care | 2013 |
| FFF Recordings Limited | Arts & recreation | 2014 |
| Ffortissimo Leisure Ltd | Hospitality | 2024 |
| Fidelis Advisory Limited | Professional & scientific | 2008 |
| Fidelis Partners Limited | Administrative & support | 2006 |
| Fifty One/Fifty Two Vanbrugh Park Limited | Households | 2007 |
| Fiinnac Ltd | Real estate | 2023 |
| Film & TV Enterprise Limited | Professional & scientific | 2022 |
| Film Props Ltd | Information & communication | 2011 |
| FIN Consultancy Ltd | Professional & scientific | 2013 |
| Fin-Trade Solutions Ltd | Information & communication | 2018 |
| Finchers Consulting Limited | Health & social care | 2009 |
| Find a Place Ltd | Real estate | 2019 |
| Findtech Limited | Professional & scientific | 2004 |
| Findtree Limited | Professional & scientific | 2007 |
| Finewines Limited | Extraterritorial | 1996 |
| Finyas Limited | Information & communication | 2020 |
| Fioro Ltd | Information & communication | 2010 |
| Fire Fighting Enterprises Limited | Professional & scientific | 1982 |
| Firefly Entertainment Ltd | Professional & scientific | 2024 |
| First Touch Sports Coaching Limited | Health & social care | 2012 |
| First Villa Properties Ltd | Real estate | 2023 |
| Fit Products Limited | Extraterritorial | 2019 |
| Five Smooth Stones Limited | Professional & scientific | 2009 |
| Flintlock Education Ltd | Education | 2012 |
| Flintlock Theatre | Arts & recreation | 2019 |
| Flitetec Limited | Manufacturing | 1993 |
| Flitetrak Limited | Manufacturing | 2017 |
| Floors at Fourteen Limited | Construction | 2019 |
| Floriobilinski Creations Limited | Real estate | 2020 |
| Flower Boutique Ltd | Wholesale & retail | 2011 |
| FLX Services Limited | Construction | 2020 |
| Flyco Limited | Other services | 2001 |
| Flying Design Limited | Professional & scientific | 2015 |
| FM (Ckaf) Ltd | Hospitality | 2022 |
| Focus Media Solutions Limited | Information & communication | 2013 |
| Foisbusinesslaw Ltd | Professional & scientific | 2020 |
| Folgate Properties Limited | Real estate | 2010 |
| Folwark (UK) Ltd | Real estate | 2007 |
| Fontain Motors Limited | Wholesale & retail | 1991 |
| Foodnet Enterprises Limited | Financial services | 2021 |
| Foodnet Holdings Limited | Professional & scientific | 2002 |
| Foodnet Limited | Hospitality | 1990 |
| Footprints & Whispers Limited | Wholesale & retail | 2025 |
| Footsteps (Bucks) Limited | Health & social care | 2010 |
| Force 9 Energy Limited | Energy | 2021 |
| Force 9 Energy Partners LLP | | 2010 |
| Formidable Music Ltd | Professional & scientific | 2025 |
| Fornax Finance Ltd | Extraterritorial | 2023 |
| Fortiores UNA Limited | Financial services | 2021 |
| Fortiori Law Limited | Professional & scientific | 2022 |
| Forwardground Property Management Limited | Extraterritorial | 1990 |
| Fourtell Ltd | Administrative & support | 2026 |
| FOX & Co Construction Limited | Construction | 2023 |
| Fraxis Media Limited | Information & communication | 2025 |
| Frazer Financial Services Limited | Administrative & support | 2008 |
| Freeaim Technologies Limited | Professional & scientific | 2021 |
| Fresh Home Cleaning Services Limited | Public administration | 2022 |
| Friars Croft Enterprises Ltd | Financial services | 2016 |
| Front Velocity Limited | Information & communication | 2008 |
| Frontier Rail Consultants Ltd | Professional & scientific | 2012 |
| Frontline Buddy Ltd | Professional & scientific | 2023 |
| FSK Financial Planning Ltd | Financial services | 2022 |
| Fugen Networks Ltd | Information & communication | 2016 |
| Fulbeck Properties Limited | Real estate | 2004 |
| FVM01 Ltd | Financial services | 2023 |
| Fxmotion Ltd | Information & communication | 2020 |
| G & E Contracts Limited | Professional & scientific | 2018 |
| Gabi Harrison Consulting Ltd | Administrative & support | 2020 |
| Gable House Investments Ltd | Real estate | 2025 |
| Galty Ventures Ltd | Wholesale & retail | 2009 |
| Galway Gate Limited | Professional & scientific | 2019 |
| Game Plan Sports Limited | Education | 2023 |
| Garcia Equine Ltd | Real estate | 2025 |
| Garments Care Ltd | Other services | 2025 |
| Garrison Smart Homes Limited | Real estate | 2022 |
| Garthway Advisory Limited | Professional & scientific | 2026 |
| GAS MAN Gill Ltd | Construction | 2024 |
| GAS Pro Limited | Construction | 2012 |
| Gathani Enterprises Ltd | Real estate | 2018 |
| GBB Electrical Ltd | Construction | 2018 |
| Gbta Europe Limited | Administrative & support | 2009 |
| GCH Technologies Limited | Manufacturing | 2022 |