| Eastpoint Church | Other services | 2017 |
| Eastside Arts | Arts & recreation | 2015 |
| Eastside Business Centre Limited | Professional & scientific | 2025 |
| Eastside Deli Belfast Ltd | Hospitality | 2025 |
| Eastside Greenways | Other services | 2012 |
| Eastside Partnership | Other services | 1996 |
| Eastside Property Belfast | Real estate | 1998 |
| Eastside Services NI Limited | Wholesale & retail | 2026 |
| Eastside Taxi Management Limited | Transport & logistics | 2023 |
| Eastside Taxis Limited | Transport & logistics | 2016 |
| Eastside Tourism Ltd | Administrative & support | 2017 |
| Eastwood Agents Ltd | Real estate | 2022 |
| Eastwood Construction Ltd | Construction | 2019 |
| Eastwood Credit Limited | Real estate | 2009 |
| Eastwood Pictures Ltd | Administrative & support | 2020 |
| Easy Boom E-Commerce Co., Ltd | Extraterritorial | 2024 |
| Easy Data Recovery Ltd | Information & communication | 2014 |
| Easy Read NI Limited | Administrative & support | 2023 |
| Easy Tax Accountancy NI Ltd | Professional & scientific | 2020 |
| Easyline Roofing and Repairs Limited | Construction | 2024 |
| Easysend Ltd | Financial services | 2011 |
| Easyslides Ltd | Information & communication | 2012 |
| Eat-O-Pak Ltd | Manufacturing | 2022 |
| Eatao Castlecourt Ltd | Hospitality | 2023 |
| Eazyriderz NI Ltd | Wholesale & retail | 2020 |
| EB (Northern Ireland) Limited | Financial services | 2013 |
| EB Property Services Ltd | Construction | 2024 |
| Ebecomemore Ltd | Wholesale & retail | 2023 |
| Eblana House Management Company Limited | Hospitality | 2007 |
| EBM Community Services Ltd | Hospitality | 2025 |
| Ebony ASD Ltd | Wholesale & retail | 2024 |
| Ebrington Hall Management Company Limited | Real estate | 2022 |
| EC Ambat Ltd | Health & social care | 2020 |
| EC Legal Process Servers Ltd | Professional & scientific | 2020 |
| EC Property Investments Limited | Real estate | 2019 |
| EC Wholesale Ltd | Wholesale & retail | 2025 |
| Ecaj Ltd | Health & social care | 2025 |
| Eccet Ltd | Professional & scientific | 2021 |
| Ecclesiastical Brokers Limited | Financial services | 2015 |
| ECG Coaching Limited | Arts & recreation | 2020 |
| ECH Innovation Ltd | Professional & scientific | 2023 |
| Echo & Ember Limited | Financial services | 2023 |
| Echo Drip Ltd | Wholesale & retail | 2025 |
| Echo Northern Ireland Limited | Administrative & support | 2006 |
| ECI Lighting (NI) Limited | Manufacturing | 2006 |
| Eclarton Limited | Wholesale & retail | 2024 |
| Eclate Ltd | Hospitality | 2023 |
| Eclipse IT Support Ltd | Information & communication | 2010 |
| Eclipse Technology Belfast Limited | Information & communication | 2022 |
| Eclo Circle Limited | Wholesale & retail | 2025 |
| Eco Efficiency Heating Ltd | Wholesale & retail | 2019 |
| Eco Fresh Food Ltd | Wholesale & retail | 2022 |
| Eco Planet Belfast Limited | Water & waste | 2022 |
| Ecobead Limited | Manufacturing | 2003 |
| Ecobuild Design & Construction Ltd | Construction | 2024 |
| Ecocity Developments Hilden Limited | Real estate | 2023 |
| Ecocity Developments Limited | Construction | 2019 |
| Ecocity Developments Lochburn Ltd | Construction | 2025 |
| Ecocrete Limited | Manufacturing | 2018 |
| Ecoformula Labs Ltd | Wholesale & retail | 2024 |
| Ecohydrological Analysis Limited | Professional & scientific | 2013 |
| Ecologyni Ltd | Professional & scientific | 2025 |
| Ecom Software Limited | Information & communication | 2000 |
| Ecomm Direct Limited | Wholesale & retail | 2023 |
| Ecomovate Ltd | Wholesale & retail | 2024 |
| Ecomvest Limited | Other services | 2022 |
| Economic Planning and Environmental Consultants Ltd | Information & communication | 1997 |
| Economic Properties Ltd | Real estate | 2000 |
| Ecosparkni Limited | Construction | 2021 |
| Ecowood Belfast Ltd | Construction | 2021 |
| Ecowood Ireland Ltd | Wholesale & retail | 2024 |
| Ecto-Vault Ltd | Wholesale & retail | 2025 |
| Ed.Marketing Ltd | Other services | 2018 |
| Edco 2021 Ltd | Financial services | 2021 |
| Eddmac Ltd | Professional & scientific | 2024 |
| Edecos Ltd | Transport & logistics | 2018 |
| Edel Mccaffrey Consulting Ltd | Other services | 2017 |
| Eden Bridal Limited | Wholesale & retail | 2015 |
| Eden Grange Property Holdings Ltd | Real estate | 2025 |
| Eden M & E Limited | Construction | 2017 |
| Eden Printing Inks Ltd | Manufacturing | 2005 |
| Eden Rental Homes NI Ltd | Real estate | 2024 |
| Eden ROC Investments Limited | Financial services | 2024 |
| Eden Wood (N.I.) Ltd | Households | 2018 |
| Edenbrook Investments Limited | Real estate | 2006 |
| Edenbrook Properties Ltd | Real estate | 2003 |
| Edenderry Developments Limited | Real estate | 1996 |
| Edenderry House Farm Ltd | Agriculture & fishing | 2024 |
| Edenderry Trading Limited | Extraterritorial | 2008 |
| Edenglen Estates Ltd | Real estate | 2026 |
| Edenvale Developments Limited | Extraterritorial | 1987 |
| Edenvale Lane Management Company Limited | Real estate | 2015 |
| EDF Coaching Ltd | Health & social care | 2026 |
| Edgcumbe Consulting Ltd | Professional & scientific | 2024 |
| Edge Coffeehouse Ltd | Hospitality | 2020 |
| Edgewater Apartments (NO.1) Limited | Households | 2013 |
| Edgewater Apartments (NO.6) Limited | Households | 2017 |
| Edgewater Apartments (Number Four) Limited | Households | 1988 |
| Edgewater Apartments (Number Seven) Limited | Households | 1988 |
| Edgewater Hotel Limited | Real estate | 2002 |