| Elmgold Investments Limited | Construction | 1998 |
| Elmwood Business Centres Limited | Real estate | 2015 |
| Elmwood Cottages Management Ltd | Households | 2004 |
| Elmwood Management Services Limited | Households | 1987 |
| Elmwood Protection Services Limited | Construction | 2025 |
| Elol Ltd | Information & communication | 2025 |
| Elomense Limited | Health & social care | 2024 |
| Elric Limited | Administrative & support | 2010 |
| Elsies Woodfired Pizza Limited | Hospitality | 2023 |
| Elsteel N.I Limited | Manufacturing | 2023 |
| Elstran Limited | Manufacturing | 1995 |
| Elta Properties Ltd | Real estate | 2026 |
| Elucidate Consultancy Limited | Information & communication | 2007 |
| Elvanta Limited | Wholesale & retail | 2026 |
| Elvoro Commerce Limited | Wholesale & retail | 2026 |
| Elwood & Capper Limited | Other services | 2005 |
| Elwood Medical Limited | Health & social care | 2023 |
| ELY Manor Ltd | Households | 2016 |
| Elysial Ltd | Education | 2024 |
| Elysium Business Group LP | | 2019 |
| Elysium Gym Ltd | Arts & recreation | 2013 |
| Elyte Sports Limited | Arts & recreation | 2025 |
| ELZ Acquisitions Ltd | Professional & scientific | 2022 |
| EM Aesthetics Limited | Health & social care | 2019 |
| EM Business Consultants Limited | Administrative & support | 2018 |
| EM Studio Academy Ltd | Education | 2026 |
| Em&M Global Limited | Wholesale & retail | 2024 |
| EMA Contracts Ltd. | Construction | 2017 |
| EMA Global Limited | Wholesale & retail | 2021 |
| EMA Wellbeing Ltd | Health & social care | 2017 |
| Emadan Healthcare Ltd | Health & social care | 2023 |
| Email Saviour Limited | Information & communication | 2007 |
| Emania Trading Limited | Wholesale & retail | 2018 |
| Embankment Management Services Limited | Households | 2004 |
| Embark Protein Ltd | Manufacturing | 2024 |
| Ember Advertising and Media Limited | Manufacturing | 2023 |
| Ember Power Ltd | Energy | 2013 |
| Emberly Company Ltd | Wholesale & retail | 2025 |
| Embrace Ortho Ltd | Health & social care | 2020 |
| Embrace Vibe'Er's Ltd | Other services | 2025 |
| EMC Performance Academy Ltd | Arts & recreation | 2021 |
| EMC Performance Programmes Ltd | Arts & recreation | 2022 |
| EMC Properties (NI) Limited | Real estate | 2009 |
| Emca Limited | Professional & scientific | 2021 |
| Emcc Solutions Ltd | Wholesale & retail | 2011 |
| Emcgsolutions Limited | Professional & scientific | 2008 |
| Emck Medical Limited | Health & social care | 2023 |
| Emeen Enterprise Ltd | Administrative & support | 2022 |
| Emel Solutions Ltd | Wholesale & retail | 2023 |
| Emerald - Light Auto Mart Limited | Wholesale & retail | 2025 |
| Emerald Ancestors Limited | Administrative & support | 2007 |
| Emerald Chauffeurs Belfast Limited | Transport & logistics | 2026 |
| Emerald City 2026 Ltd | Hospitality | 2026 |
| Emerald Creative Limited | Wholesale & retail | 2023 |
| Emerald Custodian Services Limited | Other services | 2025 |
| Emerald Enterprise (IRL) Limited | Transport & logistics | 2024 |
| Emerald Enterprises (UK) Ltd | Information & communication | 1999 |
| Emerald Erwen Ltd | Wholesale & retail | 2024 |
| Emerald Golf and Culture Tours Ltd | Administrative & support | 2024 |
| Emerald Green Media Ltd | Information & communication | 2019 |
| Emerald Hall Limited | Health & social care | 2021 |
| Emerald Isle Apparel Ltd | Wholesale & retail | 2021 |
| Emerald Isle Limited | Extraterritorial | 2024 |
| Emerald Isle Properties Limited | Administrative & support | 2007 |
| Emerald LJ LP | | 2023 |
| Emerald Nextwave Energy Limited | Construction | 2026 |
| Emerald Power Ltd | Construction | 2015 |
| Emerald Protect Limited | Financial services | 2025 |
| Emerald Slumber Ltd | Wholesale & retail | 2025 |
| Emerald Tree & Landscapes Ltd | Administrative & support | 2024 |
| Emerald Urgent Care Limited | Health & social care | 2024 |
| Emerald Window Cleaning Supplies Ltd | Manufacturing | 2025 |
| Emerge 21 Ltd | Information & communication | 2024 |
| Emerge Markets Ltd | Wholesale & retail | 2026 |
| Emerging Markets Power (Holdings) Limited | Energy | 2016 |
| Emerging Markets Power (NI) Limited | Energy | 2016 |
| Emexconsult Ltd | Administrative & support | 2012 |
| Emezzions Care Limited | Manufacturing | 2025 |
| EMG Bridge Consulting Ltd | Professional & scientific | 2019 |
| EMG N.I. Ltd | Other services | 2025 |
| Emien Boper Ltd | Wholesale & retail | 2024 |
| Emijoa Limited | Wholesale & retail | 2024 |
| Emily Peru Hope Trust | Other services | 2016 |
| Eminence Global Services Limited | Information & communication | 2025 |
| Emirobel Ltd | Financial services | 2015 |
| Emit Ltd | Information & communication | 2020 |
| Emit Technologies Ltd | Information & communication | 2025 |
| Emjw Limited | Arts & recreation | 2025 |
| EMK Template Design Ltd | Information & communication | 2020 |
| Emkc UK Limited | Education | 2015 |
| EMM Productions Ltd | Information & communication | 2012 |
| Emma and Samuel Mullan Ltd | Manufacturing | 2021 |
| Emma Hughes Limited | Manufacturing | 2024 |
| Emma Kenny Ltd | Professional & scientific | 2014 |
| Emma Louise Bailey Ltd | Wholesale & retail | 2025 |
| Emma Louise Smith Ltd | Wholesale & retail | 2025 |
| Emma Lyons Ltd | Professional & scientific | 2026 |
| Emma SUE Bannon Limited | Wholesale & retail | 2024 |
| Emmafloair Ltd | Professional & scientific | 2016 |
| Emmanuel Belfast | Other services | 2024 |