| Eacm Properties LLP | | 2016 |
| Eannetta Limited | Wholesale & retail | 2024 |
| Early Birdie Golf Ltd | Wholesale & retail | 2021 |
| Easy Clean Machines Ltd | Manufacturing | 2021 |
| Easyconveyance Ltd. | Real estate | 2017 |
| EB Mccallan Building Ltd | Construction | 2016 |
| Ebrington Holdings Ltd | Financial services | 2018 |
| Eccles & Kerr Building Contractors Limited | Construction | 2019 |
| Ecclesville Printing Services Ltd | Professional & scientific | 2013 |
| Echo GEN Ltd | Real estate | 2011 |
| Echoprop Limited | Real estate | 2024 |
| Eclipse Cinemas Ltd | Information & communication | 2014 |
| Eclipse Products Ltd | | 2003 |
| ECM Eco Energy Innovation Limited | Construction | 2026 |
| Ecohog Limited | Manufacturing | 2013 |
| Ecology NW Ltd | Professional & scientific | 2023 |
| Econi Ltd | Real estate | 2022 |
| EDA Architects Ltd | Professional & scientific | 2022 |
| Edenglen Holdings Limited | Financial services | 2022 |
| Edenglen Properties Limited | Real estate | 2017 |
| Edenvale Contracts Limited | Construction | 2014 |
| EF Site Limited | Construction | 2018 |
| EH Consulting Engineer Limited | Professional & scientific | 2023 |
| EH Groundsworks Ltd | Construction | 2026 |
| Eirtite Ltd | Wholesale & retail | 2024 |
| EJM Mckeown Ltd | Manufacturing | 2005 |
| EKG Graham Limited | Health & social care | 2025 |
| EKO Farms Ltd | Wholesale & retail | 2021 |
| EL Greco Sauce Innovations Ltd | Manufacturing | 2019 |
| Elda Homes Limited | Construction | 1989 |
| Electraserve Ltd | Professional & scientific | 2025 |
| Electricast Ltd | Manufacturing | 2018 |
| Elite Performance & Recovery Limited | Arts & recreation | 2024 |
| Elkin Plumbing Supplies Ltd | Wholesale & retail | 2012 |
| Ellison Engineering Ltd | Construction | 2025 |
| Emac Contracts Ltd | Information & communication | 2020 |
| Emerald Isle Maintenance Ltd | Manufacturing | 2019 |
| Emmroan Developments Limited | Arts & recreation | 2007 |
| EMN Mechanical Ltd | Professional & scientific | 2026 |
| Empowerment Quality Engineering Limited | Information & communication | 2006 |
| END Holdings Ltd | Financial services | 2024 |
| Endoscopic Solutions Ltd | Health & social care | 2025 |
| Energy Cloud Limited | Professional & scientific | 2021 |
| Enviro Care N.I. Limited | Water & waste | 2004 |
| EP Assessment Solutions Limited | Education | 2023 |
| EPF Inspections Ltd | Agriculture & fishing | 2016 |
| Epro Asset Management Ltd | Professional & scientific | 2019 |
| Erin Energie Limited | Extraterritorial | 2011 |
| Erne Brickwork Ltd | Construction | 2022 |
| Erne Electrical Services Ltd | Construction | 2023 |
| Erne Hardware Supplies Limited | Wholesale & retail | 2023 |
| Ernegas Services Limited | Water & waste | 2014 |
| Eska Energy Limited | Energy | 2022 |
| Eskra Childcare Limited | Education | 2002 |
| Eskra Community Association | Arts & recreation | 2000 |
| Eskra Quarries Ltd | Mining & quarrying | 2019 |
| ETN Holdings Ltd | Financial services | 2023 |
| Etso Holdings Ltd | Financial services | 2023 |
| Euro Auctions (UK) Ltd | Wholesale & retail | 2019 |
| Euro Auctions (UK) NO.2 Ltd | Wholesale & retail | 2001 |
| Euro Auctions Holdings Limited | Financial services | 2017 |
| Euro Auctions Limited | Financial services | 2019 |
| Euro Auctions Middle East Limited | Financial services | 2022 |
| Evergreen Biogas SM Ltd | Energy | 2014 |
| Evergreen Landscaping & Gardening Ltd | Administrative & support | 2025 |
| Evergreen Natural Energy Ltd | Energy | 2011 |
| Every Step Skills Ltd | Education | 2021 |
| Expansion Enterprises Ltd | Professional & scientific | 2019 |
| F & H Engineering (Omagh) Ltd | Construction | 2005 |
| F G Groundworks Ltd | Construction | 2008 |
| F150 Properties Limited | Real estate | 2015 |
| Fabx Engineering Ltd | Professional & scientific | 2026 |
| Face Regeneration Ltd | Other services | 2024 |
| Fairywater Farms Ltd | Agriculture & fishing | 2019 |
| Fairywater Peat Co. Ltd | Manufacturing | 2003 |
| Fairywater Properties (NI) Ltd | Real estate | 2025 |
| Falcarragh Ltd | Extraterritorial | 2024 |
| Falcon Commercial Finance Ltd | Financial services | 2017 |
| Falcon Property Development Ltd | Construction | 2024 |
| Falk Ltd | Extraterritorial | 2013 |
| Fallagh Hire Ltd | Construction | 2022 |
| Families Moving on | Other services | 2010 |
| Farmhill Construction Limited | Construction | 2019 |
| Farmtheory Ltd | Information & communication | 2021 |
| FD Designs.Architects Ltd | Professional & scientific | 2024 |
| Fecarry Farm Ltd | Agriculture & fishing | 2019 |
| Feeneys 5LA Ltd | Hospitality | 2023 |
| Feeneys 72BCL Ltd | Hospitality | 2023 |
| Feeneys Pubs Ltd | Hospitality | 2022 |
| Feeroocon Limited | Manufacturing | 2023 |
| Ferco Contracts Ltd | Agriculture & fishing | 2015 |
| Ferman Global Resources Ltd | Wholesale & retail | 2023 |
| Fern Contracts Ltd | Construction | 2021 |
| Fernview Contracts Ltd | Construction | 2018 |
| Fernview Property Maintenance Ltd | Administrative & support | 2016 |
| FG Homes (N.I.) Ltd | Real estate | 2019 |
| Fifo Capital Finance Ltd | Financial services | 2016 |
| Figtec Ltd | Information & communication | 2025 |
| Financial Options Ltd | Other services | 2012 |
| Find Your Masterpiece Ltd | Wholesale & retail | 2021 |