| Euro Environmental JV Limited | Construction | 2014 |
| Euro Gold Field Ltd | Water & waste | 2015 |
| Euro Services Contracts Ltd | Construction | 2009 |
| Euro Services Hire Limited | Construction | 2019 |
| Eurojadis Limited | Wholesale & retail | 2023 |
| European FOG Association Ltd | Professional & scientific | 2010 |
| European Grease Management Association Ltd | Professional & scientific | 2010 |
| EV Breakers Ltd | Water & waste | 2022 |
| EV Power Ltd | Wholesale & retail | 2018 |
| EVA & Co Group Ltd | Other services | 2026 |
| Event Walls NI Ltd | Wholesale & retail | 2020 |
| Events Hireni Limited | Hospitality | 2018 |
| Evergold Organization L.P. | | 2017 |
| Eversafe Technologies Limited | Manufacturing | 2015 |
| Evertin Protein Ltd | Manufacturing | 2025 |
| Everything IT Design Ltd. | Manufacturing | 2021 |
| Everythings Rosie Limited | Wholesale & retail | 2024 |
| Evie & Fionn Ltd | Manufacturing | 2019 |
| EVO Brickworkx Limited | Construction | 2024 |
| Evolness Group LP | | 2022 |
| Evolution Geotechnical Engineering Ltd | Construction | 2024 |
| Evolve Contracts NI Ltd | Construction | 2026 |
| Evvr Inspired Ltd | Hospitality | 2026 |
| Evvr Paws Ltd | Agriculture & fishing | 2026 |
| Evvrclean Ltd | Administrative & support | 2020 |
| EW Creamery Ltd | Hospitality | 2021 |
| EX7 Ltd | Administrative & support | 2023 |
| Exact CNC (NI) Ltd | Manufacturing | 2013 |
| Exact Comms Ltd | Information & communication | 2022 |
| Exact Medical Ltd | Manufacturing | 2020 |
| Excel Construction (N.I.) Ltd | Construction | 2009 |
| Excel Gymnastics C.I.C. | Arts & recreation | 2016 |
| Excel Plumbing Products (NI) Limited | Wholesale & retail | 1993 |
| Excelerator Partners Ltd | Professional & scientific | 2023 |
| Excelex Limited | Information & communication | 2020 |
| Excelxceed Ltd | Professional & scientific | 2026 |
| Executive Cars (NI) Ltd | Wholesale & retail | 2011 |
| Executive Hair & Co. Ltd | Wholesale & retail | 2025 |
| Executive Wood Products Limited | Administrative & support | 2004 |
| Exitex (UK) Ltd | Manufacturing | 2019 |
| Exitex Holdings Limited | Financial services | 2025 |
| Exmark Construction L.P. | | 2017 |
| Exolt Limited | Other services | 2019 |
| Exona Universal L.P. | | 2017 |
| Experienceeducation Ltd | Education | 2025 |
| Express Import Car Sales Ltd | Wholesale & retail | 2022 |
| Extend Elite Ltd | Other services | 2024 |
| Extrainvest L.P. | | 2017 |
| EYE Media Broadcasting Group Ltd | Information & communication | 2023 |
| Ezliving Furniture (Northern Ireland) | Wholesale & retail | 2021 |
| Ezliving Furniture (Webni) | Wholesale & retail | 2021 |
| Ezvis Ltd | Administrative & support | 2025 |
| F & G Development Limited | Real estate | 2007 |
| F C K Labels Productions Ltd | Arts & recreation | 2023 |
| F&N Male Grooming Ltd | Other services | 2019 |
| F. K. Electrical Limited | Construction | 2006 |
| F. Mcparland & Co Ltd | Construction | 2001 |
| F10 Marine Limited | Wholesale & retail | 2020 |
| FAB Construct Services Ltd | Construction | 2008 |
| FAB Health Limited | Other services | 2003 |
| Fabtops Limited | Manufacturing | 2009 |
| Fair Green Engineering Ltd | Manufacturing | 2019 |
| Fair Havens Harbour Ltd | Other services | 2024 |
| Fairbairn Opticians Ltd | Wholesale & retail | 2018 |
| Faire (NI) Limited | Information & communication | 2007 |
| Fairview Hall Limited | Construction | 2024 |
| Fairvox United L.P. | | 2017 |
| Fairways Manor Management Company Ltd | Households | 2016 |
| Fairways View Management Ltd | Households | 2010 |
| Fairwinds Property Management Ltd | Households | 2002 |
| Fallon's Pubs Ltd | Hospitality | 2022 |
| Fane Control Panels Limited | Manufacturing | 2003 |
| Farhan Medical Services Ltd | Health & social care | 2025 |
| Farm Candy Ltd | Agriculture & fishing | 2021 |
| Farm Energy (N.I) Ltd | Energy | 2013 |
| Farm to Fork Ltd | Manufacturing | 2013 |
| Farrell Electrical Contracts Limited | Construction | 2019 |
| Fastfab Engineering Limited | Extraterritorial | 2005 |
| FAT Fish Marketing Limited | Information & communication | 2016 |
| Fathom Line Construction Limited | Construction | 2026 |
| Fathom Line Holdings Limited | Financial services | 2025 |
| Fathom Properties Ltd | Real estate | 2025 |
| Fatyak Limited | Wholesale & retail | 2018 |
| Faughill Joinery Works Ltd | Construction | 2018 |
| Fawkes Coffee Ltd | Hospitality | 2018 |
| Fayre & Square Restaurant Crossmaglen Ltd | Hospitality | 2024 |
| Fayre Properties Ltd | Real estate | 2026 |
| FB & Associates Ltd | Health & social care | 2023 |
| FB INT Developments Ltd | Agriculture & fishing | 2018 |
| FC Farms Ltd | Agriculture & fishing | 2013 |
| FCM Sales L.P. | | 2017 |
| FCP Consultants Limited | Professional & scientific | 2009 |
| FCR Haulage Ltd | Transport & logistics | 2017 |
| FCS Food Ltd | Hospitality | 2024 |
| FDJ Ecommerce Ltd | Administrative & support | 2021 |
| Fearon Bros Ltd | Manufacturing | 2004 |
| Fearon Brothers Limited | Wholesale & retail | 2019 |
| Fearon Motor Sales Ltd | Wholesale & retail | 2021 |
| Feast Rostrevor Ltd | Hospitality | 2024 |
| Federation of Family Practices Armagh and Dungannon C.I.C. | Health & social care | 2015 |