| Esidock NI Limited | Wholesale & retail | 2021 |
| Esjm UK Limited | Health & social care | 2021 |
| ESL Futures Ltd | Real estate | 2020 |
| ESO Solutions UK Ltd | Information & communication | 2019 |
| Esperia Holdings Limited | Real estate | 2023 |
| Esposito Gennaro Ltd | Wholesale & retail | 2025 |
| Esquiregroup Ltd | Real estate | 2025 |
| ESS Ireland Ltd | Energy | 2024 |
| ESS Modular Limited | Construction | 2019 |
| Essentia Tax Technologies Limited | Information & communication | 2021 |
| ESSENTIALS4MEN Ltd | Wholesale & retail | 2015 |
| Essentialsm Ltd | Wholesale & retail | 2025 |
| Essex Mews Management Company Ltd | Households | 2025 |
| Established Coffee Co. Ltd. | Hospitality | 2013 |
| Established Coffee Roasters Ltd | Wholesale & retail | 2016 |
| Establishment Manpower Ltd | Transport & logistics | 2025 |
| Ester Commerce LP | | 2018 |
| Estomac Limited | Health & social care | 2018 |
| ETA Futures Ltd | Professional & scientific | 2022 |
| ETA Property 1 Ltd | Real estate | 2024 |
| Etain Limited | Information & communication | 1999 |
| Etalon Ireland Limited | Extraterritorial | 2015 |
| Etam PLC | | 1943 |
| ETC Awards Ltd | Education | 2000 |
| Ethan Webb Ltd | Wholesale & retail | 2025 |
| Ethanna Developments Limited | Professional & scientific | 2002 |
| Ethanna LLP | | 2009 |
| Ethera Solution LP | | 2017 |
| Ethermic Ltd. | Construction | 2023 |
| Ethnic Language Support Ltd | Education | 2019 |
| Ethril Ltd | Hospitality | 2014 |
| Etolan Ltd | Information & communication | 2009 |
| Etpl ESS Limited | Administrative & support | 2022 |
| Etrux Limited | Manufacturing | 2021 |
| Etta Essence Ltd | Other services | 2025 |
| EU Representative Ltd | Wholesale & retail | 2024 |
| Eu-Uk Authorised Representative Limited | Professional & scientific | 2020 |
| EUC UK Limited | Information & communication | 2020 |
| Eugene Donaghy Ltd | Wholesale & retail | 2025 |
| Eugene Kelly Ltd | Wholesale & retail | 2025 |
| Eugene Lynch Associates Ltd | Professional & scientific | 2020 |
| Eugene Mclaughlin Ltd | Wholesale & retail | 2025 |
| Euro Advice Legal Services Ltd | Professional & scientific | 2021 |
| Euro Aggregates Limited | Extraterritorial | 1998 |
| Euro Bros 2021 Ltd | Wholesale & retail | 2021 |
| Euro Electrix (NI) Limited | Construction | 2006 |
| Euro Freight Solutions Ltd | Transport & logistics | 2019 |
| Euro Garden and Home Limited | Wholesale & retail | 2012 |
| Euro Groupe Ltd | Other services | 2016 |
| Euro Sterling Ltd | Wholesale & retail | 2024 |
| Euro Supply Chain Jobs Limited | Administrative & support | 2011 |
| Euro-Asian Consultancy Limited | Administrative & support | 2022 |
| Euro-Pharm Limited | Manufacturing | 2025 |
| Euro-Tec (Bangor) Limited | | 1994 |
| Euro.Africa Consult Ltd | Professional & scientific | 2024 |
| Eurocables (Belfast) Limited | Wholesale & retail | 1996 |
| Eurocarautologistics Ltd | Transport & logistics | 2023 |
| Eurocarlogistics NI Limited | Transport & logistics | 2025 |
| Eurocem Limited | Extraterritorial | 1997 |
| Euroclean (NI) Ltd | Other services | 2010 |
| Euroconnect Express Ltd | Transport & logistics | 2023 |
| Eurofit NI Limited | Wholesale & retail | 2016 |
| Eurojet Aviation Limited | | 1993 |
| Eurol Freight Ltd | Transport & logistics | 2012 |
| Euromotive Group Ltd | Wholesale & retail | 2026 |
| Europa Car Wash Limited | Wholesale & retail | 2019 |
| European Contract Interiors Ltd | Construction | 2014 |
| European Delicatessance (2008) Limited | Wholesale & retail | 2008 |
| European Fire & Stoves Ltd | Extraterritorial | 2007 |
| European Magazine Services Limited | | 1999 |
| European Quality Services Private Limited | Professional & scientific | 2019 |
| European Responsibility Limited | Administrative & support | 2024 |
| Eurotas Limited | Construction | 2018 |
| Eurotech Innovations Ltd | Wholesale & retail | 2025 |
| Eurotrade Logistics LP | | 2017 |
| Eurotrading Ireland Ltd | Wholesale & retail | 2020 |
| Eutectyx Limited | Professional & scientific | 2026 |
| Eutopia Leisure Limited | Administrative & support | 2007 |
| Euzer Ltd | Other services | 2024 |
| Evaar Consulting Limited | Professional & scientific | 2019 |
| Evans Close Europe Limited | Extraterritorial | 2025 |
| Evant Capital Limited | Construction | 2015 |
| Evasia Ltd | Wholesale & retail | 2023 |
| Evci Global Limited | Professional & scientific | 2022 |
| Evenshot Ltd | Professional & scientific | 2025 |
| Event Centre LLP | | 2012 |
| Event Direct Ltd | Arts & recreation | 2006 |
| Event Medic (NI) Ltd | Health & social care | 2011 |
| Event Seating NI Limited | Other services | 2016 |
| Event Warrior Limited | Hospitality | 2018 |
| Eventfully Yours Ltd | Administrative & support | 2025 |
| Eventmap Solutions Limited | Financial services | 2019 |
| Eventni Ltd | Administrative & support | 2025 |
| Events & Stuff Ltd | Administrative & support | 2025 |
| Events Barn Limited | Professional & scientific | 2018 |
| Eventsec (LL) Holdings Limited | Financial services | 2025 |
| Eventsec Holdings (LL) Limited | Financial services | 2025 |
| Eventsec Holdings Limited | Financial services | 2021 |
| Eventsec Ltd | Administrative & support | 2000 |
| Everay Renewables (NI) Limited | Energy | 2026 |