| East Coast Lift Services Limited | Manufacturing | 2005 |
| East Coast Locums Ltd | Health & social care | 2022 |
| East Coast Motorboat Training Ltd | Education | 2016 |
| East Coast Paving Limited | Administrative & support | 2013 |
| East Coast Property Services Lowestoft Ltd | Construction | 2026 |
| East Coast Recovery Ltd | Health & social care | 2008 |
| East Coast Resin Limited | Construction | 2026 |
| East Coast Scaffolding Limited | Construction | 2006 |
| East Coast Static Solutions Ltd | Hospitality | 2024 |
| East Cost Car Valeting Ltd | Other services | 2024 |
| East Events Co Ltd | Administrative & support | 2026 |
| East Harbour Events Ltd | Hospitality | 2024 |
| East Point Bargains Limited | Wholesale & retail | 2025 |
| East Point Business Services Ltd | Administrative & support | 2014 |
| East Point Developments EA Limited | Construction | 2024 |
| East Point Electrical Limited | Construction | 2022 |
| East Point Interiors Limited | Construction | 2019 |
| East Point Motorhomes Ltd | Wholesale & retail | 2021 |
| East Point Paws Ltd | Other services | 2018 |
| East Point Pension Solutions Limited | Professional & scientific | 2014 |
| East Point Properties Ltd | Real estate | 2020 |
| East Point Storage Solutions Ltd | Transport & logistics | 2021 |
| East Suffolk Building Preservation Trust | Construction | 2010 |
| East Suffolk One Media C.I.C. | Information & communication | 2019 |
| East-Point Sports Ltd. | Wholesale & retail | 2011 |
| Eastbridge Elms Limited | Professional & scientific | 2021 |
| Eastcoast Lets Ltd | Real estate | 2021 |
| Eastcoast Windscreens Ltd | Wholesale & retail | 2021 |
| Eastcroft Properties Limited | Construction | 1989 |
| Eastern Beach Holiday Park Limited | Hospitality | 2006 |
| Eastern Care Homes Ltd | Extraterritorial | 2013 |
| Eastern Commercial Services (LT) Limited | Wholesale & retail | 2018 |
| Eastern Consultancy Services Ltd | Administrative & support | 2025 |
| Eastern Design Architecture Ltd | Professional & scientific | 2019 |
| Eastern Energy Consultants Limited | Professional & scientific | 2014 |
| Eastern Healthcare (Holdings) Limited | Financial services | 2020 |
| Eastern Healthcare Estates Limited | Extraterritorial | 2018 |
| Eastern Healthcare Ltd | Health & social care | 2013 |
| Eastern Marine Limited | Manufacturing | 2011 |
| Eastern Specialist Services Limited | Health & social care | 2016 |
| Eastern Spray Services Limited | Construction | 2010 |
| Eastleigh Flats Limited | Professional & scientific | 1987 |
| Eastpoint Car Repairs Limited | Wholesale & retail | 2025 |
| Eastside GAS Ltd | Construction | 2024 |
| Eastview (Lowestoft) Ltd. | Health & social care | 2001 |
| Easy Solar Limited | Construction | 2024 |
| Easyresidences Holdco Limited | Financial services | 2024 |
| Easyresidences Opco Limited | Health & social care | 2024 |
| Easyresidences Propco Limited | Real estate | 2024 |
| Eaton's Pallets Ltd | Manufacturing | 2015 |
| Eaura Ltd | Wholesale & retail | 2021 |
| EB Financial Limited | Financial services | 2025 |
| EBG Empowering Business Growth Ltd | Professional & scientific | 2024 |
| Eclipse Decorating and Building Limited | Construction | 2010 |
| Eco Chimney Sweep Limited | Administrative & support | 2012 |
| Eco Systems (East Anglia) Limited | Administrative & support | 2007 |
| Ecommattresses Ltd | Wholesale & retail | 2025 |
| Econiti Ltd | Professional & scientific | 2016 |
| ECS Accountancy Ltd. | Professional & scientific | 2015 |
| ECS Web Design Ltd. | Information & communication | 2015 |
| Edmonds Z & a Properties Limited | Real estate | 2024 |
| EIGHTY20 Ltd | Wholesale & retail | 2022 |
| EIM Oilfield Services Ltd | Administrative & support | 2014 |
| EKC (E.A) Limited | Hospitality | 2008 |
| Electrafix (EA) Limited | Construction | 2022 |
| Electrical & Instrument Offshore Services Ltd | Construction | 2025 |
| Electromech Shears Limited | Administrative & support | 2012 |
| Electwarehouse Limited | Wholesale & retail | 2026 |
| Elegance Staffing Ltd | Administrative & support | 2023 |
| Elevated Access Scaffolding Ltd | Construction | 2025 |
| Eliot Engineering Limited | Professional & scientific | 2007 |
| Elite Foodservice Design Ltd | Wholesale & retail | 2016 |
| Elite Interiors (UK) Ltd | Construction | 2000 |
| Elite Physiques Gym Ltd | Arts & recreation | 2025 |
| Elite Power and Lighting Ltd | Construction | 2026 |
| Elitetrain Co Limited | Other services | 2025 |
| Elizabeth Court (Lowestoft) Management Company Limited | Households | 1989 |
| Elkesie Limited | Health & social care | 2015 |
| Ellis Subsea Ltd | Professional & scientific | 2024 |
| ELM Foods Ltd | Hospitality | 2025 |
| Elmwood Care Homes Limited | Health & social care | 2023 |
| Elmwood Healthcare Properties Limited | Health & social care | 2023 |
| Elsbury Events Limited | Hospitality | 2024 |
| Emelle's Bistro Limited | Wholesale & retail | 2025 |
| Eminent Care Services Limited | Health & social care | 2009 |
| Empha-Systems Limited | Information & communication | 1990 |
| Empire Hair Salon Limited | Other services | 2018 |
| Empower EA Limited | Construction | 2018 |
| Empowering Communities AU Limited | Other services | 2018 |
| Empowering Technologies Ltd | Information & communication | 2007 |
| Enby Ltd | Wholesale & retail | 2021 |
| Endeavour Motors Limited | Wholesale & retail | 2014 |
| Endeavour Property Limited | Real estate | 2026 |
| Energy Marine Consultancy Services Limited | Mining & quarrying | 2021 |
| Engineer Christopher Clark Ltd | Construction | 2020 |
| English Country Cottages Limited | Professional & scientific | 2003 |
| Engpro Limited | Professional & scientific | 2009 |
| Ennkay Holdings Ltd | Transport & logistics | 2025 |
| Envi Southwold Limited | Other services | 2025 |
| Epic Electrical (Lowestoft) Ltd | Construction | 2014 |