| Croker Properties Limited | Extraterritorial | 2005 |
| Crown J Properties Ltd | Real estate | 2024 |
| Crumlin Plant Sales Limited | Wholesale & retail | 2001 |
| CST Properties Ltd | Real estate | 2003 |
| D&G Products Limited | Manufacturing | 2025 |
| Daily Prophetic Ltd | Information & communication | 2023 |
| Darren Vogan Ltd | Construction | 2025 |
| Davidson Funeral Services Ltd | Other services | 2024 |
| DBD Haulage Ltd | Transport & logistics | 2022 |
| DBL Donnelly Building Ltd | Construction | 2014 |
| Deila Ltd | Wholesale & retail | 2020 |
| Dernavogie Developments Limited | Real estate | 2021 |
| Derrygavad Holdings Ltd | Financial services | 2020 |
| Derryhirk Management Company Limited | Professional & scientific | 2010 |
| Derryveagh Limited | Administrative & support | 2023 |
| Derryvore Properties Limited | Real estate | 2018 |
| DGM (N.I.) Ltd | Real estate | 2017 |
| Digital Hype Limited | Administrative & support | 2016 |
| Direct Ferries (Ireland) Ltd | Extraterritorial | 2003 |
| DMX Technologies Ltd | Wholesale & retail | 2011 |
| Doctor of Aesthetics Ltd | Health & social care | 2021 |
| DQ Contracts Ltd | Construction | 2018 |
| DRL Energy Ltd | Manufacturing | 2015 |
| Drumard Properties Ltd | Real estate | 2024 |
| Dunbarton Properties (Co. Down) Limited | Real estate | 2000 |
| Dunway Properties Limited | Real estate | 2025 |
| E&E Developments Limited | Construction | 2006 |
| E-Cloud Emporium Limited | Wholesale & retail | 2016 |
| East Coast Ministries (Ireland) Limited | Health & social care | 2013 |
| East Forensic Psychiatry Limited | Health & social care | 2022 |
| Elevate IC Ltd | Professional & scientific | 2019 |
| Empirefitnessgymni Ltd | Arts & recreation | 2021 |
| Empower Gardening and Educational Centre Ltd | Wholesale & retail | 2020 |
| ESP Solutions Ltd | Professional & scientific | 2003 |
| Evadan Limited | Other services | 2012 |
| Everytrade Solutions Ltd | Wholesale & retail | 2026 |
| Evron Foods Limited | Hospitality | 1983 |
| Express Merchants Ltd | Wholesale & retail | 2017 |
| Fige Ltd | Real estate | 2018 |
| Finnard Developments Limited | Construction | 2004 |
| Finnard Finance Limited | Financial services | 2011 |
| First Stop Consulting NI Ltd | Financial services | 2024 |
| First Stop Mortgages & Protection NI Ltd | Financial services | 2016 |
| First Stop Wills & Estate Planning Ltd. | Financial services | 2019 |
| FMC Building Services Limited | Construction | 2013 |
| Foyleside Acquisitions Limited | Real estate | 2014 |
| Fresh-Dental Independent Dental Hygiene Clinic Ltd | Health & social care | 2023 |
| G & AJ Properties Ltd | Real estate | 2022 |
| G&M Motorcars Limited | Wholesale & retail | 2022 |
| GAC Farming Ltd | Administrative & support | 2017 |
| Gaea Environmental Limited | Water & waste | 2016 |
| Gamaliel Investment Venture Entrepreneur - International UK Limited | Professional & scientific | 2026 |
| Gate & Door Solutions Ltd | Manufacturing | 2024 |
| Gerard Maguire Solicitors Limited | Professional & scientific | 2014 |
| Giffin Hughes Surveyors Limited | Professional & scientific | 2014 |
| Gilford Van Hire Limited | Administrative & support | 1986 |
| GJ Windows Ltd | Construction | 2023 |
| GK Portadown Ltd | Hospitality | 2024 |
| Glass Hannath Property Ltd | Real estate | 2024 |
| Glenfinn Properties Limited | Construction | 2006 |
| Glenlough Developments Limited | Construction | 2004 |
| Glenview Private Care Home Ltd | Extraterritorial | 2016 |
| Global Interiors (IRL) Ltd | Wholesale & retail | 2013 |
| Global Skin & Hide Co. Ltd | Manufacturing | 2010 |
| Global Steel Arch Buildings Limited | Manufacturing | 2002 |
| Global Technical Limited | Financial services | 2023 |
| GN Medical Services Ltd | Health & social care | 2025 |
| Goal Line Youth Trust Limited-The | Other services | 1991 |
| Goban Street Management Company Limited | Real estate | 2013 |
| Gordys Ltd | Hospitality | 2025 |
| Gosford View Manor Management Co Ltd | Households | 2021 |
| Gotec Software Solutions Ltd | Information & communication | 2020 |
| Graham & Percival Limited | Construction | 2010 |
| Greenmount Veterinary Clinic Limited | Professional & scientific | 2010 |
| GW Precision Engineering Ltd | Manufacturing | 2024 |
| H & H Precision Engineering Ltd | Professional & scientific | 2006 |
| Hackett Properties Limited | | 2006 |
| Haffey Group Holdings Ltd | Financial services | 2026 |
| Haffey Ireland Limited | Professional & scientific | 2004 |
| Hannath Ltd | Real estate | 2018 |
| Harshaw Investments Limited | Real estate | 2024 |
| HE Feedstock Ltd | Wholesale & retail | 2018 |
| Helping Hands Community Outreach Project | Health & social care | 2021 |
| Hemp Works Ltd | Agriculture & fishing | 2019 |
| Hilltop Farm Supplies Ltd | Extraterritorial | 2006 |
| Hilmark Limited | Real estate | 2000 |
| Horta Soils Limited | Professional & scientific | 1988 |
| Hunniford Energy Ltd | Agriculture & fishing | 2014 |
| Iain Irwin Photography Ltd | Professional & scientific | 2025 |
| In-House Publishing Ltd | Information & communication | 2005 |
| Indocrafts Ltd | Wholesale & retail | 2020 |
| Inksanity Bodydesign Limited | Other services | 2016 |
| Inn Road Manor Management (Dollingstown) Ltd | Households | 2025 |
| Isdj Ltd | Wholesale & retail | 2025 |
| J M Tiling Ltd | Construction | 2024 |
| J. H. Turkington & Sons Limited | Construction | 1985 |
| J.D. Tipler Limited | Wholesale & retail | 1991 |
| J.H.T. (UUC) Limited | Real estate | 2002 |
| J.H.T. Newtownards Limited | Construction | 2001 |
| JA Devlin Engineering Ltd | Manufacturing | 2014 |