| ESC Group International Ltd | Construction | 2025 |
| Escape South Limited | Real estate | 2023 |
| Essex Surgical Specialists Ltd | Health & social care | 2015 |
| Estate Grocer Limited | Real estate | 1961 |
| ETA (Holdings) Ltd | Professional & scientific | 2009 |
| Eta-Connect Limited | Manufacturing | 2015 |
| Eurasian Boxing Parliament Ltd | Arts & recreation | 2015 |
| European Society for Vascular Surgery | Information & communication | 2002 |
| European Vascular Surgery Journals Limited | Information & communication | 1999 |
| European Vascular Surgery Trading Limited | Professional & scientific | 2015 |
| Evan Davies Limited | Health & social care | 2003 |
| Evan Davies Medical LLP | | 2026 |
| Evans Hunter Properties Limited | Real estate | 2019 |
| Evans-Hunter Limited | Real estate | 2014 |
| Event Perfection Limited | Other services | 2014 |
| Eversawn Limited | Manufacturing | 2025 |
| Everyday Solutions Limited | Professional & scientific | 2012 |
| Everything in Motion Ltd | Information & communication | 2019 |
| Evocarbon Limited | Energy | 2020 |
| Experto Credite Consulting Limited | Construction | 2012 |
| EYE Photography Limited | Professional & scientific | 2014 |
| Eyegas Consultants Limited | Health & social care | 2012 |
| Eyegas Medical Services LLP | | 2026 |
| EZE Bookkeeping Services Ltd | Professional & scientific | 1989 |
| F&B Landford Limited | Administrative & support | 2019 |
| Faded Glamour Ltd | Professional & scientific | 2025 |
| Fair Health Care Limited | Administrative & support | 2012 |
| Fair Play Consulting Limited | Professional & scientific | 2009 |
| Fairwood Estates Limited | Real estate | 2025 |
| Falcon Vanguard Improvements Ltd | Construction | 2023 |
| Famshire Limited | Professional & scientific | 2024 |
| Fanfield Farm Ltd | Agriculture & fishing | 2019 |
| Farley and Flick Holdings Limited | Financial services | 2026 |
| Farm and General Supplies Limited | Extraterritorial | 2015 |
| FDF Medical Limited | Health & social care | 2019 |
| Feather & Bloom Limited | Manufacturing | 2017 |
| Feature Staircase Limited | Manufacturing | 2019 |
| Feed Ingredients Trading Limited | Other services | 2026 |
| Femak Incorporation UK Limited | Financial services | 2011 |
| Femcare Group Limited | Professional & scientific | 2004 |
| Femcare Limited | Manufacturing | 1988 |
| Fencing Direct Hampshire Ltd | Administrative & support | 2022 |
| Fenwick Commercial Services Limited | Construction | 2004 |
| Ferguson Joinery Limited | Construction | 2004 |
| Fern Freight Limited | Transport & logistics | 2019 |
| FFK Properties Limited | Households | 2011 |
| Field Partition Solutions Ltd | Construction | 2011 |
| FIG and FOX Design Ltd | Wholesale & retail | 2022 |
| FIG Products Ltd | Wholesale & retail | 2018 |
| FIG Recycling Ltd | Wholesale & retail | 2023 |
| Finance Technology Services Limited | Information & communication | 2018 |
| FINISH3D Ltd | Manufacturing | 2025 |
| Finishing Touch International Ltd | Wholesale & retail | 2018 |
| Fireoak Ltd | Information & communication | 2015 |
| Firestorm Digital Ltd | Information & communication | 2026 |
| Firework Productions Ltd | Information & communication | 2020 |
| First Carlton Holdings Limited | Real estate | 2018 |
| Fit.Rockstarr Ltd | Other services | 2019 |
| Fitumi Properties Ltd | Real estate | 2025 |
| Fitzgerald Transport Ltd | Transport & logistics | 2024 |
| Fixtrue Solutions Ltd | Construction | 2025 |
| Flame Installations Limited | Construction | 2022 |
| Flannel and FIR Ltd | Wholesale & retail | 2025 |
| Flatiron Capital Limited | Hospitality | 2015 |
| Fleetside Ltd | Construction | 2023 |
| Flexworld UK Limited | Real estate | 1998 |
| Floretti Ltd | Hospitality | 2025 |
| Flowtic Ltd | Wholesale & retail | 2025 |
| Flywalk Ltd | Wholesale & retail | 2006 |
| Focus Asset Finance Limited | Financial services | 2001 |
| Focus Business Services Limited | Administrative & support | 2021 |
| Focus CGI Ltd | Professional & scientific | 2016 |
| Focus Finance Limited | Financial services | 2001 |
| Focus Leasing Limited | Extraterritorial | 2005 |
| Ford Management Company Limited | Households | 2004 |
| Forest and Cove Ltd | Wholesale & retail | 2021 |
| Forest Grange Limited | Financial services | 2023 |
| Foreverwild Pins Community Interest Company | Wholesale & retail | 2025 |
| Fork N Spoon Ltd | Hospitality | 2013 |
| Forth Building Services Ltd | Construction | 2000 |
| Forth Fire Ltd | Public administration | 2022 |
| Forth Group Services Limited | Real estate | 2022 |
| Forth Hold Limited | Financial services | 2017 |
| Forth Technical Services Ltd | Construction | 2000 |
| Fortissium Consulting Ltd | Information & communication | 2017 |
| Foster and Williams Limited | Hospitality | 2025 |
| Foster Fencing Limited | Manufacturing | 2008 |
| Four by Four Hire Limited | Wholesale & retail | 1970 |
| Fourth Winds Ltd | Construction | 2018 |
| Foxcraft Engineering Limited | Wholesale & retail | 2003 |
| Foxcraft Racing Limited | Arts & recreation | 2020 |
| Foxes Lane Estate Ltd | Real estate | 2020 |
| FR Homes & Developments Limited | Real estate | 2020 |
| Frampton & Frampton Ltd | Education | 2024 |
| Frank Murphy Consulting Ltd | Health & social care | 2011 |
| Frank Woodward Construction Consultants Limited | Construction | 2004 |
| Franklin Allan Limited | Real estate | 2011 |
| Freeman Maintenance South Ltd | Construction | 2024 |
| Freemantle Garage Ltd | Wholesale & retail | 2020 |
| Freshtake Media Limited | Professional & scientific | 2017 |