| Earls Colne Consultancy Ltd | Professional & scientific | 2020 |
| Earls Colne Farm Limited | Agriculture & fishing | 2012 |
| Early Learners Academy Limited | Education | 2024 |
| Early Mist Investments Unlimited | Financial services | 2024 |
| Earlybird Healthcare Group Ltd | Administrative & support | 2015 |
| Earlybird Roofing & Building Limited | Construction | 2024 |
| Earl’S Meadow (Easton) Management Company Limited | Households | 2018 |
| Earth Child Project Limited | Information & communication | 2020 |
| Earthenform Ltd | Wholesale & retail | 2026 |
| Ease My Click Limited | Transport & logistics | 2024 |
| Easi Blake Holdings Limited | Financial services | 2025 |
| Eason Media Limited | Arts & recreation | 2010 |
| East 15 Acting School Limited | Extraterritorial | 2002 |
| East Anglia Efficient Solutions Ltd | Energy | 2025 |
| East Anglia Environmental Services Limited | Professional & scientific | 1998 |
| East Anglia Property Investments Ltd | Real estate | 2016 |
| East Anglian Financial Planning (Services) Ltd | Administrative & support | 2022 |
| East Anglian Financial Planning Ltd | Financial services | 2013 |
| East Anglian Lift Service Limited | Manufacturing | 2013 |
| East Anglian Property Investments Limited | Administrative & support | 2004 |
| East Anglian Railway Museum (Trading) Limited | Wholesale & retail | 1970 |
| East Anglian Renovations Limited | Real estate | 1992 |
| East Anglian Residential Limited | Real estate | 1999 |
| East Anglian Traction Engine Club | Arts & recreation | 1987 |
| East Anglian Trailers Limited | Wholesale & retail | 1987 |
| East Berghof Limited | Real estate | 2025 |
| East Bergholt Thai Ltd | Hospitality | 2022 |
| East Block Group Limited | Real estate | 2017 |
| East Blossom Limited | Hospitality | 2025 |
| East Coast Camper Company Limited | Administrative & support | 2025 |
| East Coast Car Recovery Ltd | Transport & logistics | 2022 |
| East Coast Lofts Ltd | Construction | 2026 |
| East Coast Marine Aggregates Limited | Wholesale & retail | 2021 |
| East Coast Medicals Ltd. | Health & social care | 2017 |
| East Coast Mortgage Ltd | Financial services | 2021 |
| East Coast Sailmakers Ltd | Manufacturing | 2025 |
| East Effects Ltd | Arts & recreation | 2012 |
| East Hanningfield and Great Burstead Cricket Club Limited | Arts & recreation | 2012 |
| East Harbour Group Limited | Wholesale & retail | 2017 |
| East Hays Farming Limited | Agriculture & fishing | 1996 |
| East Housing Ltd | Real estate | 2023 |
| East Kent Pharma Consulting Ltd | Administrative & support | 2016 |
| East Links Residential Lettings Limited | Real estate | 2019 |
| Eastcoast Highways Ltd | Other services | 2018 |
| Easter Green Ltd | Professional & scientific | 2014 |
| Easter Square (Property) Limited | Real estate | 2023 |
| Eastern Best Ltd | Real estate | 2013 |
| Eastern Counties Educational Trust Limited | Education | 1922 |
| Eastern Edge Ltd | Professional & scientific | 2010 |
| Eastern Family Services Limited | Health & social care | 2011 |
| Eastern HE Cost Sharing Limited | Professional & scientific | 2015 |
| Eastern Heatwise Ltd | Construction | 2012 |
| Eastern Lift Services Limited | Manufacturing | 2003 |
| Eastern National Busmen's Canteen Ltd | Hospitality | 2024 |
| Eastern Plastics Machinery Limited | Wholesale & retail | 1976 |
| Eastern Road Markings Limited | Construction | 2004 |
| Eastern Sports Surfaces Ltd | Construction | 2016 |
| Eastern Square (Project Management) Limited | Real estate | 2009 |
| Eastern Square Contracts Limited | Construction | 2025 |
| Eastern Theorists Limited | Professional & scientific | 2013 |
| Eastland Securities Limited | Real estate | 1971 |
| Easton Homes Ltd | Construction | 2020 |
| Eastside Spaces Limited | Administrative & support | 2008 |
| Eastwell House Limited | Households | 1995 |
| Eastwell Roofing Limited | Construction | 2021 |
| Eastwood Drive (Highwoods) Management Company Limited | Households | 1986 |
| Eastwood Tile Ltd | Wholesale & retail | 2017 |
| Easy Auto Repair Centre Limited | Wholesale & retail | 2018 |
| Easyfit Tire Essex Limited | Wholesale & retail | 2020 |
| Easyheat Solutions Ltd | Construction | 2025 |
| EAT Food Limited | Hospitality | 2015 |
| EAT Inn Diner Ltd | Hospitality | 2024 |
| Eateasy Limited | Information & communication | 2009 |
| Eatlookfeel Ltd | Health & social care | 2021 |
| Eaton House Studio Ltd | Administrative & support | 2012 |
| Eatonoak Limited | Households | 1990 |
| Eats at Home Ltd | Transport & logistics | 2023 |
| Eave Assistants Ltd | Administrative & support | 2024 |
| Eazybuy Ltd | Wholesale & retail | 2025 |
| EB Transport Ltd | Transport & logistics | 2016 |
| EBB & Flow Colchester Ltd | Other services | 2019 |
| Ebbisham Lane Holdings Ltd | Real estate | 2019 |
| Ebec Holdings Limited | Professional & scientific | 2007 |
| Ebi-Jay Ventures Ltd | Wholesale & retail | 2025 |
| EBM Group Ltd | Financial services | 2026 |
| EBM One Ltd | Wholesale & retail | 2026 |
| Ebony Close (Charter House) RTM Company Limited | Households | 2019 |
| EC Chesterwell (PVT) Ltd | Hospitality | 2024 |
| EC Managed Services Ltd | Professional & scientific | 2022 |
| EC MIX Ltd | Professional & scientific | 2019 |
| EC Services Ltd | Construction | 2025 |
| Ecacalin Ltd | Health & social care | 2018 |
| Ecare Ltd | Health & social care | 2012 |
| Ecatch Trend Limited | Wholesale & retail | 2023 |
| ECC Property Investments Ltd | Real estate | 2021 |
| Eccentric IT Solutions Ltd | Information & communication | 2016 |
| Ecco Solutions Ltd | Information & communication | 2010 |
| ECF Finance Limited | Financial services | 2018 |
| Echelon Care Ltd | Health & social care | 2023 |
| Echelon Inc Limited | Wholesale & retail | 2023 |