| E & a Tooling Limited | Manufacturing | 1982 |
| E and C Flack Consultancy Ltd | Professional & scientific | 2025 |
| E C Simpson Plant Hire Limited | Agriculture & fishing | 1997 |
| EAF Logistics Ltd | Transport & logistics | 2008 |
| EBS Property Management Limited | Real estate | 1956 |
| Ectagon Ltd | Administrative & support | 2023 |
| Edge to Edge Garden Design Limited | Administrative & support | 2004 |
| Edify London Ltd | Professional & scientific | 2018 |
| Ednam Estates Limited | Construction | 1935 |
| Edwards Limited | Manufacturing | 2007 |
| EG Spice Limited | Hospitality | 2022 |
| Ejct ENG Ltd | Professional & scientific | 2023 |
| Electair Exports Ltd. | Wholesale & retail | 1985 |
| Electrical Test Inspect Limited | Construction | 2006 |
| Elegant & Shine Ltd | Other services | 2025 |
| Elektrotech Limited | Information & communication | 2001 |
| Elibrix Limited | Real estate | 2018 |
| Elite Aviation Limited | Transport & logistics | 1994 |
| Elite Office Systems Technology Limited | Wholesale & retail | 2004 |
| Embraer CAE Training Services (U.K.) Limited | Education | 2023 |
| Emcel Filters Limited | Manufacturing | 1957 |
| Emerald Financial Solutions Limited | Financial services | 2005 |
| Emerge Training and Consultancy Ltd | Professional & scientific | 2007 |
| Emily Rollings Limited | Wholesale & retail | 1996 |
| Emma Waddingham Consulting Ltd | Professional & scientific | 2013 |
| Empire Grill Ltd | Hospitality | 2021 |
| Empire Paper Limited | Manufacturing | 1988 |
| Empty Jets Limited | Professional & scientific | 2003 |
| Enerconsult Limited | Professional & scientific | 2005 |
| Energy Watcher Limited | Professional & scientific | 2008 |
| Engineering Support Publications Ltd | Manufacturing | 1996 |
| English Yarns Limited | Wholesale & retail | 1996 |
| Enterdata Computers Limited | Information & communication | 1998 |
| Enterprise Cleaning Services Limited | Administrative & support | 1994 |
| Environmental and Energy Control Limited | | 1982 |
| Envitia Group Limited | Information & communication | 2000 |
| Ephesus Painting & Decorating Ltd | Construction | 2016 |
| ERA Healthcare Limited | Health & social care | 2006 |
| ERA Training Limited | Education | 2006 |
| Eric Marchant & Co. - Burgess Hill | | 1989 |
| Eric Marchant & Co. - Hassocks | | 1989 |
| Erinmore Ltd | Professional & scientific | 2003 |
| Euro Datagen Limited | Professional & scientific | 1989 |
| European Abnormal Load Logistics Ltd | Transport & logistics | 2021 |
| European Travelplan Limited | Administrative & support | 1985 |
| Euroscope Finance & Property Limited | Financial services | 1990 |
| Eurotherm Limited | Manufacturing | 1965 |
| Everything Bathrooms and Showers Limited | Wholesale & retail | 2017 |
| Exclusive Expeditions Ltd | Administrative & support | 2024 |
| Executive Services (Gatwick) Limited | Administrative & support | 2001 |
| Executive Solutions Search and Selection Limited | Administrative & support | 1997 |
| Exemplar Project Solutions Limited | Other services | 2006 |
| Exonova Ltd | Professional & scientific | 2025 |
| Express Burger Rustington Ltd | Hospitality | 2025 |
| Fagus Sylvatica Ltd | Professional & scientific | 2025 |
| Fairlawn Controls Limited | Professional & scientific | 2004 |
| Farney Educational Trust | Education | 1955 |
| Farren Court Homes Limited | Construction | 1996 |
| Farro Hicks Limited | Professional & scientific | 1990 |
| Farthings Walk Property Management Company Limited | Households | 1999 |
| FAZ Air Limited | Administrative & support | 2004 |
| FB Europe Limited | Real estate | 2008 |
| FDT GB Limited | Wholesale & retail | 2002 |
| Feedmec Limited | Financial services | 1998 |
| Feetplus Rochester Ltd | Health & social care | 2004 |
| Felton Property Services Limited | Real estate | 1998 |
| Ferrywaye Court Management Limited | Households | 1991 |
| FGA Services Ltd | Professional & scientific | 2020 |
| Fiction Films Ltd | Arts & recreation | 2015 |
| Fidelis Consultants Limited | Financial services | 2007 |
| Figurative Limited | Professional & scientific | 2001 |
| Finance Systems Integration Ltd. | Information & communication | 2000 |
| Findahome Limited | Information & communication | 2007 |
| Finite Technology Limited | Professional & scientific | 2003 |
| Fircroft Newsagency Limited | Wholesale & retail | 2005 |
| Fire Extinguisher Valve Company Limited | Manufacturing | 2003 |
| First Class Function Limited | Other services | 2007 |
| First Steps Childcare Group Limited | Education | 1993 |
| Firstgate Services Limited | Manufacturing | 2002 |
| Firstkey Systems Limited | Information & communication | 2000 |
| Fixem Limited | Wholesale & retail | 1999 |
| Flatpitch Limited | Professional & scientific | 2004 |
| Fleetrise Limited | Professional & scientific | 1998 |
| Flich Limited | Health & social care | 2014 |
| Flomec (Europe) Limited | Professional & scientific | 2007 |
| Flomec Limited | Professional & scientific | 2007 |
| Flowgrange Limited | Households | 1995 |
| Fontwell Consultants Limited | Professional & scientific | 1998 |
| Food Standard Solutions Limited | Professional & scientific | 2003 |
| Force 9 Design Ltd | Professional & scientific | 2007 |
| Forest Lodge Residents Company Limited | Households | 2003 |
| Forestfield Software Limited | Information & communication | 1990 |
| Forever Care Ltd | Health & social care | 2006 |
| Formalstart Property Management Limited | Households | 1994 |
| Fortech G. R. P. Limited | Manufacturing | 1988 |
| Four B Consulting Ltd | Professional & scientific | 2023 |
| Fourfront Limited | Information & communication | 1990 |
| Frederick Bartholomew Ltd | Real estate | 2005 |
| Freds Fish and Chips Limited | Hospitality | 2002 |
| Frogg Limited | Other services | 2005 |