| Evolution Security Systems Europe Limited | Extraterritorial | 2011 |
| Evolve Homes Ltd | Real estate | 2015 |
| Evolve Project Management Limited | Construction | 2012 |
| Excel Fundraising Limited | Administrative & support | 2021 |
| Exclusive Ladyk Limited | Health & social care | 2025 |
| Exclusively Cats Limited | Agriculture & fishing | 2020 |
| Exclusively Thames Valley Limited | Professional & scientific | 2016 |
| Executive Tax and Advisory Services Ltd | Professional & scientific | 2024 |
| Exhib Direct Limited | Administrative & support | 2004 |
| Expowiz Limited | Administrative & support | 2023 |
| Expozone Limited | Professional & scientific | 2004 |
| External Construction Solutions Limited | Construction | 2017 |
| Eyebolt Limited | Real estate | 2015 |
| Eyecare Solutions Ltd | Wholesale & retail | 2010 |
| EYES2MARKET UK Limited | Professional & scientific | 2005 |
| Ezra LAI Homes Ltd | Construction | 2017 |
| Fairbairn Lawson Engineering Projects Ltd. | Manufacturing | 1988 |
| Falcon Construction & Management Contractors Ltd | Construction | 2016 |
| Falcons Nest Consulting Limited | Professional & scientific | 2023 |
| FAMILY4EVER Ltd | Health & social care | 2021 |
| Famous Brands UK Limited | Professional & scientific | 2002 |
| Fangs FX Limited | Arts & recreation | 2001 |
| FAR Business Ventures Limited | Professional & scientific | 2011 |
| Faro Communications Limited | Professional & scientific | 2022 |
| Farrier Court (Bourne END) Freehold One Limited | Hospitality | 2018 |
| Fastosh Aviation Limited | Manufacturing | 2016 |
| Faye's Sitters Limited | Information & communication | 2025 |
| Feeney Consulting Limited | Professional & scientific | 2025 |
| Felix Negribus Limited | Professional & scientific | 2021 |
| Ferry Lane Advisory Ltd | Professional & scientific | 2023 |
| Fest Holdings Limited | Administrative & support | 2023 |
| Ffinch Limited | Financial services | 2024 |
| FGD Services (Southern) Limited | Construction | 2016 |
| Fidus Power Limited | Wholesale & retail | 2015 |
| Fieldview (Blackthorn) Ltd | Construction | 2023 |
| Fieldview (Sonning Common) Limited | Construction | 2024 |
| Fieldview Group Ltd | Financial services | 2023 |
| Fiennes Park Residents Management Company Limited | Households | 2015 |
| Fifield Developments Management Company (Benson) Limited | Households | 1990 |
| Fikka Limited | Real estate | 2016 |
| Film Air Services Limited | Transport & logistics | 2019 |
| Financial Progression Limited | Professional & scientific | 2008 |
| Fingest Property Ltd | Real estate | 2024 |
| Finpro-Connect Ltd | Information & communication | 2016 |
| Fin’S Fast Track Limited | Education | 2025 |
| Fireflies Fitness CIC | Health & social care | 2022 |
| Firestarter Coaching Ltd | Professional & scientific | 2021 |
| Firestarter Collective LLP | | 2021 |
| Firestarter Creative Ltd | Professional & scientific | 2015 |
| Firestone Solutions Limited | Information & communication | 2010 |
| Firmstone Limited | Real estate | 2002 |
| First Avenue Consulting Ltd | Professional & scientific | 2021 |
| First Growth | Health & social care | 2011 |
| First Thames Limited | Other services | 2017 |
| Fischer Consulting Limited | Professional & scientific | 2019 |
| Fishy Escapes Ltd | Hospitality | 2024 |
| Fitapp Limited | Information & communication | 2016 |
| Five in a Boat Limited | Information & communication | 2016 |
| Fizzy Happiness Ltd | Wholesale & retail | 2022 |
| FJE Harris Legal Services Limited | Professional & scientific | 2019 |
| Flamborough Spur Management Company Limited | Households | 1990 |
| Flametree Consultants Limited | Professional & scientific | 2012 |
| Flashing Dog Star Limited | Information & communication | 2012 |
| Flats Management (RAY Park Road) Limited | Households | 1988 |
| Flatweave & Carpet Ltd | Construction | 2023 |
| Fledge Ltd | Administrative & support | 2023 |
| Fleos Limited | Wholesale & retail | 2023 |
| Flexology Limited | Professional & scientific | 2014 |
| Flinteriors Home Improvements Ltd | Construction | 2023 |
| FLO Networks Limited | Information & communication | 2012 |
| Fluency Limited | Professional & scientific | 2010 |
| Fogg & Associates Limited | Education | 2012 |
| Folbro Gravel Assets Limited | Extraterritorial | 1991 |
| Folley & SON Ltd | Water & waste | 2021 |
| Fomo AI Ltd | Information & communication | 2026 |
| Foothold Residential Limited | Real estate | 2015 |
| Foreplay Golf Limited | Manufacturing | 2025 |
| Forest Park Residents Company Limited | Households | 2000 |
| Form Consultancy Group Ltd | Construction | 2020 |
| Form Holdings Limited | Construction | 2009 |
| Form Workplace Solutions Limited | Construction | 2006 |
| Formula One Films Limited | Other services | 1971 |
| Forty Acres Ltd | Wholesale & retail | 2014 |
| Four Hundred Crews Ltd | Information & communication | 2026 |
| Four Nobles Consulting Ltd | Professional & scientific | 2017 |
| Four Seasons Amenity & Leisure Services Ltd | Construction | 2008 |
| Four Shires Marquees Ltd | Other services | 2014 |
| Fourdrinier Court Management Company Limited | Households | 1998 |
| Fourway Management Limited | Other services | 1982 |
| Fowler Smith Builders Ltd | Construction | 2023 |
| FOX Curtis Murray Limited | Professional & scientific | 1995 |
| FOX Smith Associates Ltd | Other services | 2016 |
| Foxtrot Papa Services Ltd | Professional & scientific | 2021 |
| FPH Global E-Commerce Ltd | Wholesale & retail | 2024 |
| Freddie+Florence Productions Ltd | Information & communication | 2021 |
| Freedom Songs Limited | Arts & recreation | 1968 |
| Freedomize Ltd | Professional & scientific | 2023 |
| Friday Trend Ltd | Wholesale & retail | 2019 |
| Frogeye Estates Limited | Real estate | 1990 |
| Frogeye Limited | Extraterritorial | 1987 |