| EOT Clean Ltd | Administrative & support | 2024 |
| EP Marketing Limited | Wholesale & retail | 2013 |
| Epia Limited | Real estate | 2015 |
| Epic FX Supplies Ltd | Wholesale & retail | 2019 |
| Epoc Beds Limited | Manufacturing | 2009 |
| Eppeworth Drive (Alconbury) Block Management Company Limited | Households | 2022 |
| Epph Holding Company Limited | Financial services | 2020 |
| Epph Limited | Construction | 2013 |
| Eppl P1056 Limited | Real estate | 2005 |
| Epso Limited | Real estate | 2015 |
| Eptsoft Limited | Education | 1999 |
| EQ Developments Limited | Financial services | 2023 |
| EQ Renewables Limited | Financial services | 2023 |
| Equacapital LLP | | 2018 |
| EQUATOR7 Limited | Construction | 2024 |
| Equine Investments Limited | Arts & recreation | 2005 |
| Equity Bypass Nursery Limited | Construction | 2024 |
| Equity Land Limited | Professional & scientific | 1988 |
| ER Mobile Limited | Wholesale & retail | 2017 |
| Er.Hanim.S Limited | Real estate | 2026 |
| Erasmus Productions Ltd | Information & communication | 2025 |
| Erben Machinery Limited | Wholesale & retail | 2025 |
| Ercan Arda Ltd | Hospitality | 2026 |
| ERD Properties Limited | Real estate | 2021 |
| EREN02 Limited | Transport & logistics | 2025 |
| Eric Dines Contract Flooring Limited | Wholesale & retail | 1988 |
| Eric Professional Hand Car Wash Ltd | Other services | 2023 |
| Eric Valeting Centre Ltd | Other services | 2025 |
| Erikafabi Ltd | Transport & logistics | 2024 |
| Erland Properties Limited | Real estate | 2009 |
| Ernis Ltd | Construction | 2025 |
| ERP (Anglia) Ltd | Real estate | 2025 |
| ERW Court Property Management Company Limited | Real estate | 1984 |
| Erwarton Bay Estates Ltd | Real estate | 2026 |
| ES Suffolk Limited | Information & communication | 2024 |
| ESA Solutions Ltd | Information & communication | 2011 |
| Esbourne Freehold Limited | Households | 2019 |
| Escapade 2 Limited | Construction | 2023 |
| Escape Club Ltd | Hospitality | 2025 |
| Escape to the Dales Ltd | Hospitality | 2026 |
| Escaping Gravity Limited | Information & communication | 2018 |
| Esenas Limited | Hospitality | 2018 |
| ESH (Projects) Limited | Construction | 2022 |
| Esimplay Limited | Wholesale & retail | 2025 |
| ESK Balustrade Systems Limited | Construction | 2015 |
| Eske Property Limited | Real estate | 2025 |
| ESL Productions UK Ltd | Administrative & support | 2025 |
| Eslsearch Limited | Information & communication | 2013 |
| ESN Ipswich Ltd | Hospitality | 2024 |
| Espranzo Property Management Ltd | Real estate | 2023 |
| Espressotechno Limited | Manufacturing | 2000 |
| Essential Carpet Care Ltd | Administrative & support | 2013 |
| Essential IFA Limited | Financial services | 2007 |
| Essential Wholesale Limited | Wholesale & retail | 2015 |
| Essex & Suffolk Pest Solutions Limited | Agriculture & fishing | 2010 |
| Essex Doors & Shutters Ltd | Manufacturing | 2018 |
| Essex Facilities Management Ltd | Construction | 2001 |
| Essex Golfer Limited | Arts & recreation | 2016 |
| Essex Hydroplane Racing Club Limited | Arts & recreation | 1981 |
| Essex Learning Station Ltd | Education | 2026 |
| Essex Roof Drone Services Ltd | Professional & scientific | 2024 |
| Essex Social Media Limited | Manufacturing | 2015 |
| Essex Turf Contracts Ltd | Administrative & support | 2017 |
| Essora Health Limited | Public administration | 2026 |
| EST Property Investments Limited | Real estate | 2019 |
| Esteemed Ventures Limited | Hospitality | 2022 |
| Esteri Ltd | Wholesale & retail | 2023 |
| Estherjoel Healthcare Limited | Health & social care | 2024 |
| Esture Group Ltd | Construction | 2025 |
| Estyz Kitchen Ltd | Hospitality | 2025 |
| Esualz Ltd | Health & social care | 2025 |
| Eternal Blue Cleaning Ltd | Administrative & support | 2025 |
| Eternity Healthcare Limited | Administrative & support | 2014 |
| Etheldene Limited | Professional & scientific | 2017 |
| Ethical Property Solutions Limited | Construction | 2017 |
| Ethio-Arts Ltd | Wholesale & retail | 2024 |
| Etica Projects Limited | Administrative & support | 2006 |
| Eton House Hotel Ltd | Real estate | 2025 |
| ETR Transport Ltd | Transport & logistics | 2018 |
| Etrr East Anglia Ltd | Administrative & support | 2021 |
| Etsal Limited | Hospitality | 2025 |
| Ettle Limited | Financial services | 1995 |
| ETU Limited | Construction | 2017 |
| EU Supper Market Ltd | Wholesale & retail | 2019 |
| Eums Services Ltd | Professional & scientific | 2024 |
| Euphrasia Ventures Limited | Hospitality | 2016 |
| Euro Asia Claims Limited | Financial services | 2022 |
| Euro Business Enterprises Limited | Information & communication | 2006 |
| Euro Exim Bangko Limited | Financial services | 2012 |
| Euro Ipswich Ltd | Wholesale & retail | 2025 |
| Euro Roofing Supplies Limited | Construction | 2013 |
| Euro-Trans 72 Ltd | Transport & logistics | 2017 |
| Eurobody Paint Centre Ltd | Wholesale & retail | 2019 |
| Eurocommercial Properties Limited | Administrative & support | 2000 |
| Europa Bioproducts Limited | Manufacturing | 2018 |
| Europe Investment RE Limited | Real estate | 2025 |
| European Customer Solutions Limited | Professional & scientific | 1995 |
| European Inspection Supervision Ltd | Professional & scientific | 2026 |
| European Yachting Equipment Company Limited | Professional & scientific | 1990 |
| Europium Properties Ltd | Real estate | 2022 |