| E a Fixings Limited | Extraterritorial | 2010 |
| E C P Video Limited | Information & communication | 1999 |
| E&E Cloudtech Solutions Ltd | Information & communication | 2019 |
| E&P Property Services Limited | Construction | 2023 |
| E. Clarke & SON (Coaches) Limited | Transport & logistics | 1964 |
| E.J. Business Consultants Ltd | Professional & scientific | 2002 |
| E.R. Amesbury (Rowbury) Limited | Agriculture & fishing | 1983 |
| E.U. Fire & Security Ltd | Extraterritorial | 2003 |
| E2E Data Limited | Information & communication | 2022 |
| E3 Communications Ltd | Professional & scientific | 1994 |
| Eaoza Group Ltd | Wholesale & retail | 2022 |
| Earth Works Designs Ltd | Extraterritorial | 2020 |
| East Empire Limited | Hospitality | 2024 |
| East Hillside Homes Ltd | Real estate | 2025 |
| East Woodhay Stud Ltd | Agriculture & fishing | 2026 |
| Eastern Chef Takeaway Ltd | Hospitality | 2024 |
| Eastern Leasing Company Limited(The) | Administrative & support | 1982 |
| Eastfields Management Company Limited(The) | Households | 1985 |
| Eastwick Limited | Other services | 2019 |
| Easy Advice Limited | Financial services | 2014 |
| Easy Cabs Ltd | Transport & logistics | 2024 |
| Easy Prune Ltd | Administrative & support | 2024 |
| Easy Web Accounting Limited | Professional & scientific | 2011 |
| Easytax Plus Limited | Professional & scientific | 1996 |
| EAT Bitter Ltd | Information & communication | 2025 |
| ECM Investments Ltd | Financial services | 2023 |
| Eco & Tech Limited | Information & communication | 2021 |
| Eco Extinguishers Ltd | Public administration | 2020 |
| Eco Power Generation Limited | Energy | 2019 |
| Ecocircle CIC | Manufacturing | 2021 |
| Ecologcabins Ltd | Wholesale & retail | 2019 |
| Ecotemp Services Berkshire Ltd | Construction | 2026 |
| Eddison Financial Services Limited | Financial services | 2003 |
| Eddolls Limited | Transport & logistics | 2010 |
| Eden Wildlife Trust | Administrative & support | 1997 |
| Edgemarsh Properties Limited | Real estate | 2021 |
| Editaxiis Limited | Information & communication | 2017 |
| Edition Records Limited | Information & communication | 2014 |
| Educafe CIC | Hospitality | 2021 |
| Education Business Partnership West Berkshire Limited | Education | 1993 |
| Education Maintenance Services Limited | Extraterritorial | 1995 |
| Education Vision Consultancy Ltd | Education | 2011 |
| Edward Hannam Limited | Professional & scientific | 2012 |
| Edward Odaro Ltd | Information & communication | 2023 |
| EE Homes Limited | Construction | 2015 |
| Eeek Consulting Limited | Administrative & support | 2018 |
| Eeio Technology Limited | Information & communication | 2023 |
| Effect Systems Ltd | Manufacturing | 2022 |
| EG3 Consulting Limited | Professional & scientific | 2025 |
| Egain Communications Ltd | Information & communication | 1990 |
| EGO Therapy Clinic Ltd | Health & social care | 2022 |
| Ehplabs Ltd | Wholesale & retail | 2020 |
| Eitherways Limited | Wholesale & retail | 2025 |
| EJ Financial Limited | Professional & scientific | 2014 |
| Ejbc Holdings Limited | Financial services | 2021 |
| EJC Events Limited | Professional & scientific | 2016 |
| EJM Tree Services Limited | Administrative & support | 2018 |
| EL Technology Limited | Information & communication | 2026 |
| Electac Ltd | Professional & scientific | 2007 |
| Electric Aviation Maven Ltd | Professional & scientific | 2023 |
| Electrical Trades Supply Limited | Extraterritorial | 1977 |
| Elegant Hopitality Ltd | Wholesale & retail | 2026 |
| Elegant Pictures Ltd | Information & communication | 2020 |
| Elephants Don'T Forget UK Limited | Other services | 2014 |
| ELEV8TE Talent Ltd | Administrative & support | 2025 |
| Elevenfifthteen Media Limited | Professional & scientific | 2021 |
| ELG 2025 LLP | | 2025 |
| Elite Alarm Monitoring Services Limited | Administrative & support | 2008 |
| Elite Garage Services Limited | Wholesale & retail | 2001 |
| Elite Investment Holdings Limited | Administrative & support | 2006 |
| Elite Learning Limited | Education | 2006 |
| Elite Performance Golf Studios Ltd | Arts & recreation | 2020 |
| Elite Players Academy Ltd | Other services | 2022 |
| Elite Security Management Services Limited | Administrative & support | 2009 |
| Elite Security Manned Guarding Limited | Administrative & support | 2009 |
| Elite Supplier Management Limited | Administrative & support | 2006 |
| Ellenbern Holdings Limited | Hospitality | 1961 |
| Elliot Barnes Ltd | Health & social care | 2023 |
| Elmac Software Limited | Information & communication | 2015 |
| Elmcroft Editorial Services Limited | Administrative & support | 2009 |
| Elmgrove Homes Ltd | Households | 2024 |
| Eltherm UK Limited | Manufacturing | 1978 |
| Emergency Help by Oksana Ltd | Health & social care | 2021 |
| Emerging Film Production Ltd | Information & communication | 2019 |
| Emilio Hotels Ltd | Hospitality | 2025 |
| Emily Jane Hair Group Ltd | Other services | 2024 |
| Emitforce Limited | Real estate | 1983 |
| Empowwr Limited | Wholesale & retail | 2025 |
| Emprise Associates LLP | | 2012 |
| Emprose Electrical Limited | Construction | 2002 |
| Emprose Limited | Construction | 1999 |
| EMR Hospitality Limited | Hospitality | 2024 |
| Enborne Court Management Company Limited | Households | 1989 |
| Enborne Equestrian Community Interest Company | Agriculture & fishing | 2014 |
| Enborne Equestrian Services Limited | Agriculture & fishing | 2020 |
| Enborne Estates Ltd | Real estate | 2016 |
| Enborne Gate Lodge Management Limited | Real estate | 2007 |
| Enborne Holdings Ltd | Professional & scientific | 2023 |
| Enborne Project Consultancy Ltd | Professional & scientific | 2018 |
| Enborne Systems Limited | Real estate | 1962 |