| DR Benjamin Cosgrove Ltd | Health & social care | 2025 |
| DR. Needles Ltd | Health & social care | 2018 |
| DRA Credit Management Ltd | Administrative & support | 2006 |
| Drain Master Services Limited | Water & waste | 2016 |
| Dromara Destroyers Tribute Ltd | Arts & recreation | 2013 |
| Dromore Community Initiatives C.I.C. | Health & social care | 2025 |
| Drumarkin Roofing Systems Limited | Construction | 2013 |
| Drumhare Ltd | Construction | 2021 |
| Drumnahare Developments Ltd | Construction | 2016 |
| Drumnahunshin Farms Limited | Agriculture & fishing | 2013 |
| Dufferin Rentals Ltd | Real estate | 2024 |
| Dynamic Design Consultants Ltd | Administrative & support | 2004 |
| E&I Industrial Systems Ltd | Construction | 2026 |
| E.N.E. Limited | Manufacturing | 1996 |
| E2 Computer Solutions Ltd | Information & communication | 2023 |
| Easka Products Ltd | Wholesale & retail | 2025 |
| Eastmore Investments Limited | Real estate | 2014 |
| Eden TCE Limited | Construction | 2024 |
| Edenbrook Management Company Limited | Households | 2022 |
| Education Associates Ireland Limited | Education | 2020 |
| Edward ORR Solicitors Limited | Professional & scientific | 2019 |
| EF Engineering Works Ltd | Manufacturing | 2019 |
| Efpi Limited | Real estate | 2025 |
| Eglantine Investments Limited | Real estate | 2017 |
| Elco Engineering Limited | Wholesale & retail | 2003 |
| Eleventh Investments Ltd | Construction | 2022 |
| Elkco Engineering Ltd | Construction | 2017 |
| ELM Developments (NI) Limited | Real estate | 2013 |
| Emdale Trading Ltd | Agriculture & fishing | 2012 |
| Emmet J. Kelly & Co. Solicitors Limited | Professional & scientific | 2011 |
| Employers Forum on Disability (N.I.) | Information & communication | 1996 |
| Enrich and Endure Limited | Manufacturing | 2013 |
| EOH Building and Landscaping Ltd | Construction | 2022 |
| EOS Estates Limited | Transport & logistics | 2016 |
| EOS IT Solutions Limited | Information & communication | 2011 |
| EOS Management Services LLP | | 2011 |
| EOS Process Manufacturing Ltd | Manufacturing | 2018 |
| ER Media Ltd | Information & communication | 1999 |
| Ervine Plant Ltd | Manufacturing | 2015 |
| Ervine Properties Ltd | Real estate | 2022 |
| EST28 PT Ltd | Arts & recreation | 2026 |
| Euro Food Importers (NI) Limited | Hospitality | 2015 |
| F&G Electrical Ltd | Construction | 2023 |
| FAE Ltd | Agriculture & fishing | 2019 |
| Fallswater Investments Limited | Real estate | 2020 |
| Faraway Home Productions Limited | Information & communication | 2023 |
| Farrell Electrical & Solar Limited | Construction | 2014 |
| Fedney Investments Ltd | Financial services | 2022 |
| Fegan Consulting Ltd | Construction | 2020 |
| Feral Fire & Architectural Glazing Ltd | Manufacturing | 2015 |
| Ferris & Co Solicitors Limited | Professional & scientific | 2022 |
| Financial Facts Ltd | Financial services | 2023 |
| Finney Bros Ltd | Wholesale & retail | 2016 |
| Fion Developments Ltd | Real estate | 2025 |
| FL Tiling Ltd | Construction | 2025 |
| Flan Autos & Recovery Ltd | Wholesale & retail | 2024 |
| Flash the Cash Ltd | Arts & recreation | 2026 |
| Following the Nerd Ltd | Information & communication | 2011 |
| Foster Mccavitt Ltd | Professional & scientific | 2007 |
| Fradine Ltd | Real estate | 2013 |
| Franklins 3PL Ltd | Wholesale & retail | 2012 |
| Franklins International Ltd | Manufacturing | 1976 |
| Fred Elliott Butchers Ltd | Hospitality | 2019 |
| Freya Risk Management Ltd | Extraterritorial | 2022 |
| FSG (IRL) Limited | Manufacturing | 2012 |
| Futureproof Inc Ltd | Health & social care | 2000 |
| G & MAC Properties Ltd | Real estate | 2018 |
| G.S. Properties Ltd. | Households | 1978 |
| Gadget Xchange Direct Ltd | Real estate | 2015 |
| Gadgetxchangegroup Ltd | Wholesale & retail | 2021 |
| Gallywally Enterprises Limited | Professional & scientific | 2016 |
| Garbhaig Limited | Real estate | 2014 |
| Garden Roofs N.I Ltd | Construction | 2020 |
| Gary N Daly Solicitors Ltd | Professional & scientific | 2013 |
| Gastroglobal Trading Ltd | Wholesale & retail | 2023 |
| GBE Transport Ltd | Transport & logistics | 2016 |
| GCR Business Solutions NI Ltd | Information & communication | 2024 |
| GDS2 Limited | Extraterritorial | 2005 |
| Gelderd Ltd | Construction | 2022 |
| Gemma Corbett Genetic Counselling Ltd | Health & social care | 2025 |
| Genova North West Limited | Real estate | 1999 |
| Genova Properties Limited | Administrative & support | 2007 |
| Gerdian LDC Herts Ltd | Wholesale & retail | 2025 |
| German Motor Works N.I. Limited | Manufacturing | 2019 |
| Gibson (Banbridge) Limited | Construction | 1975 |
| Gibson Bros Limited | Mining & quarrying | 1986 |
| Gibson Motors Ltd | Wholesale & retail | 2016 |
| Gibson Power Limited | Energy | 2023 |
| Gibson Properties Limited | Real estate | 1986 |
| Gibson Quarries (Banbridge) Limited | Mining & quarrying | 1978 |
| Gillen & Co Solicitors Limited | Professional & scientific | 2017 |
| Glasgiven Contracts Limited | Construction | 1984 |
| Glasker Enterprises Ltd | Construction | 2017 |
| Glasses ROW Limited | Real estate | 2024 |
| Glazing Design Systems Limited | Manufacturing | 1993 |
| Glenagri Dairy Services Ltd | Wholesale & retail | 2025 |
| Glencregagh Park (Flats) Limited | Households | 1986 |
| Glenelg Distribution Ltd | Transport & logistics | 2011 |
| Glennbridge Wealth Ltd | Financial services | 2025 |
| Glenview Farm Carnew Ltd | Agriculture & fishing | 2023 |