| Earth Events Limited | Arts & recreation | 2015 |
| Earth, Wind & Fire Consulting Limited | Professional & scientific | 2015 |
| EAS Medical Ltd | Health & social care | 2019 |
| East Anglia Building Control Limited | Professional & scientific | 1993 |
| East Anglia Car Sales Ltd | Wholesale & retail | 2016 |
| East Anglia Catering Limited | Extraterritorial | 2022 |
| East Anglia Coating Solutions Ltd | Manufacturing | 2026 |
| East Anglia Garden Landscaping Limited | Administrative & support | 2026 |
| East Anglia Inns Limited | Hospitality | 2022 |
| East Anglia Medical Care Ltd | Administrative & support | 2017 |
| East Anglia Property Ltd | Real estate | 2025 |
| East Anglia Trade Services Ltd | Construction | 2024 |
| East Anglia Transport Ltd | Transport & logistics | 2025 |
| East Anglian Consulting Services Ltd | Health & social care | 2023 |
| East Anglian Gunsmiths Ltd | Wholesale & retail | 2011 |
| East Anglian Market Ltd | Wholesale & retail | 2021 |
| East Anglian Sales Ltd | Wholesale & retail | 2023 |
| East Anglian Sealing Company Limited | Manufacturing | 2002 |
| East Anglian Solar Limited | Construction | 2022 |
| East Anglian Wholesale Florists Limited | Wholesale & retail | 2008 |
| East Bridge Property Ltd | Real estate | 2022 |
| East Coast Brickwork Ltd | Construction | 2016 |
| East Coast Consulting Limited | Professional & scientific | 2025 |
| East Coast Investment Holdings Limited | Real estate | 2021 |
| East Coast Management Services Ltd. | Real estate | 2015 |
| East Coast Metalworks Ltd | Professional & scientific | 2020 |
| East Coast Physio Ltd | Health & social care | 2015 |
| East Coast Planning Services Ltd | Professional & scientific | 2013 |
| East Coast Recycling Ltd | Wholesale & retail | 2025 |
| East Coast Roofing Contractors Ltd | Other services | 2018 |
| East Coast Technology Solutions Ltd | Professional & scientific | 2025 |
| East Dulwich Super Cleaners Ltd Ltd | Administrative & support | 2025 |
| East Fencing Ltd | Construction | 2026 |
| East Ipswich Car Sales Ltd | Wholesale & retail | 2019 |
| East of England Co-Op Travel Limited | Administrative & support | 2017 |
| East of England Co-Operative Society (Trustees) Limited | Financial services | 2017 |
| East of England Homecare C.I.C. | Other services | 2014 |
| East of England Trading Standards Association Limited | Public administration | 2004 |
| East Suffolk Builders Ltd | Construction | 2026 |
| East Suffolk Chamber of Commerce & Industry Limited | Extraterritorial | 1995 |
| East Suffolk Crematorium Limited | Other services | 2005 |
| East Suffolk Logistics Ltd | Transport & logistics | 2019 |
| East UK Accountants (City) Ltd. | Professional & scientific | 1995 |
| East Zone Motors Ltd | Wholesale & retail | 2023 |
| Eastdirect Limited | Professional & scientific | 2015 |
| Eastern Angles Production Limited | Arts & recreation | 2014 |
| Eastern Angles Theatre Company Limited | Arts & recreation | 1984 |
| Eastern Counties Motorsport Club Ltd | Arts & recreation | 2023 |
| Eastern Counties Transport Limited | Transport & logistics | 2016 |
| Eastern Electronics (Marine) Limited | Professional & scientific | 2000 |
| Eastern Estate Trading Ltd | Real estate | 2023 |
| Eastern Fire Limited | Public administration | 2003 |
| Eastern Futures Ltd | Education | 2024 |
| Eastern Hose Onsite Limited | Administrative & support | 2024 |
| Eastern Maintenance Limited | Construction | 2008 |
| Eastern Outreach Ltd | Education | 2023 |
| Eastern Plant Repairs Ltd | Manufacturing | 2017 |
| Eastern Property Rent Limited | Real estate | 2024 |
| Eastern Rail Services Limited | Administrative & support | 2011 |
| Eastern Region Care Associations Alliance Limited | Information & communication | 2023 |
| Eastern Region Investigations Limited | Administrative & support | 2026 |
| Eastern Seed Growers Limited | Wholesale & retail | 2021 |
| Eastern Technical Services Ltd | Construction | 2022 |
| Eastern Transport Services Ltd | Transport & logistics | 2025 |
| Eastern Urology Services Limited | Health & social care | 2013 |
| Eastman Underwriting Agency Limited | Financial services | 2003 |
| Eastravel Limited | Administrative & support | 1983 |
| Eastside Engineering Ltd | Professional & scientific | 2024 |
| Eastwick Investments Limited | Administrative & support | 2005 |
| Eastwood Accountancy Services Limited | Professional & scientific | 1997 |
| Easy Cabs East Anglia Limited | Transport & logistics | 2024 |
| Easy Mobility (East Anglian) Ltd | Wholesale & retail | 2006 |
| Easy Plants Newbourne Ltd | Administrative & support | 2025 |
| Easy Ryder Ltd | Other services | 2020 |
| Eatbagel Ltd | Hospitality | 2025 |
| Eaton Oxcroft Ltd | Information & communication | 2024 |
| EBB Analytics Ltd | Information & communication | 2025 |
| EBF (Trading) Ltd | Arts & recreation | 2015 |
| EBL Ipswich Ltd | Real estate | 2023 |
| Ebound Ltd | Wholesale & retail | 2003 |
| EC Beresford & Co Ltd | Professional & scientific | 2022 |
| ECB Plumbing & Heating Ltd | Construction | 2023 |
| Echelon Education Ltd | Education | 2016 |
| Echo Borealis Ltd | Information & communication | 2024 |
| Echo Eryri CIC | Manufacturing | 2025 |
| Echo Labb Limited | Information & communication | 2024 |
| Echo Narrative Limited | Wholesale & retail | 2026 |
| Echo Shot Ltd | Information & communication | 2025 |
| ECJ Catering Ltd | Hospitality | 2023 |
| Ecjrlv LLP | | 2024 |
| Eclch Property Limited | Real estate | 2021 |
| Eclipse Games Limited | Information & communication | 2025 |
| Eclipse Sound and Light Limited | Wholesale & retail | 2003 |
| Eclipto Limited | Construction | 2023 |
| Eco Concrete Limited | Manufacturing | 2014 |
| Eco Fire & Energy Solutions Ltd | Wholesale & retail | 2022 |
| Eco Invest Santiago Ltd | Construction | 2025 |
| Eco PAW Limited | Wholesale & retail | 2016 |
| Ecoanalytics Ltd | Professional & scientific | 2018 |
| Ecocare Electrical Limited | Construction | 2024 |