| GL Business Strategy Ltd | Professional & scientific | 2026 |
| Glasgowparcellogistics Ltd | Transport & logistics | 2026 |
| Glenanne Holdings Limited | Financial services | 2023 |
| Glenanne Properties Limited | Real estate | 2023 |
| Glenfarn Ltd | Transport & logistics | 2025 |
| Glenvale Waste Ltd | Water & waste | 2008 |
| Glenview Bricklaying Ltd | Construction | 2026 |
| Glenview Developments (NI) Limited | Construction | 2003 |
| Glenwood Property Services Limited | Construction | 2004 |
| Glide Design Services Limited | Information & communication | 2016 |
| Glidepath Solutions Ltd | Professional & scientific | 2022 |
| Global Cargo Solutions Limited | Transport & logistics | 2016 |
| GM Downes Limited | Manufacturing | 2023 |
| Gmac Holdings Ltd | Financial services | 2026 |
| Gmac Plant Hire Limited | Administrative & support | 2018 |
| Gmac Utilities Ltd | Construction | 2014 |
| GMC Energy Solutions Ltd | Construction | 2018 |
| GMC Landscaping Ltd | Administrative & support | 2024 |
| GMC Utility Group Ltd | Construction | 2016 |
| GMG Electrical Armagh Limited | Construction | 2025 |
| GMG Formwork Ltd | Construction | 2021 |
| Gmmt Ltd | Administrative & support | 2024 |
| Goldcare Limited | | 2006 |
| Goldcircle Mushrooms (NI) Limited | Agriculture & fishing | 2020 |
| Golden Bamboo Tang Limited | Hospitality | 2022 |
| Golden Gate Armagh Ltd | Hospitality | 2025 |
| Golden Structures Group Ltd | Administrative & support | 2022 |
| Golden Village 2026 Ltd | Hospitality | 2026 |
| Golden Village Takeaway Ltd | Hospitality | 2024 |
| Golf Day Pass Ltd | Information & communication | 2025 |
| Good People Staffing Solutions Limited | Administrative & support | 2023 |
| Gorcon Ltd | Construction | 2020 |
| Gorcon Properties and Maintenance Ltd | Construction | 2025 |
| Gorman Brian Limited | Extraterritorial | 2022 |
| Gosford Castle Estates Limited | Real estate | 2013 |
| Gosford Properties Ltd | Construction | 2021 |
| Gosford Rentals Ltd | Construction | 2024 |
| Gosford Services Ltd | Wholesale & retail | 2022 |
| Goss Group Holdings Ltd | Financial services | 2025 |
| Goss Group INT Ltd | Administrative & support | 2022 |
| Goss Rentals Ltd | Real estate | 2024 |
| GPH Mushrooms Ltd | Agriculture & fishing | 2009 |
| GR8 Electrical Limited | Construction | 2024 |
| Grafique Limited | Manufacturing | 2024 |
| Gran LA Familia (95) Ltd | Hospitality | 2024 |
| Grange BUS Hire Ltd | Transport & logistics | 2016 |
| Grange Community Group CIC | Other services | 2025 |
| Grange Haulage and Hire Ltd | Transport & logistics | 2025 |
| Grannys Fayre Limited | Administrative & support | 2016 |
| Granville N.I Limited | Financial services | 2025 |
| Gratom Ltd | Information & communication | 2019 |
| Gray & Maguire Construction Ltd | Construction | 2005 |
| Gray Construction & Design Limited | Construction | 2011 |
| Greater Rathfriland Community Development Forum Ltd | Other services | 2018 |
| Green Energy Ireland Ltd | Manufacturing | 2020 |
| Green Future Group Ltd | Construction | 2020 |
| Green Future Homes Ltd | Construction | 2019 |
| Green Vision Refrigeration Limited | Manufacturing | 2016 |
| Greenacres Broilers Ltd | Agriculture & fishing | 2026 |
| Greenacres Chicks Ltd | Agriculture & fishing | 2014 |
| Greenacres Haulage Ltd | Transport & logistics | 2016 |
| Greencircle Renewables Ltd | Energy | 2016 |
| Greene Facade Consulting Ltd | Professional & scientific | 2019 |
| Greenhall Services Limited | Extraterritorial | 2015 |
| Greentherm Ltd | Construction | 2012 |
| Greenway (Ireland) Limited | Water & waste | 2000 |
| Gridline Fit-Out Ltd | Construction | 2024 |
| Griffin Exports Limited | Wholesale & retail | 2024 |
| Grimley Electrical Ltd | Construction | 2025 |
| GSK Online Ltd | Wholesale & retail | 2025 |
| GTM Electrical (N.I.) Limited | Construction | 2019 |
| GUS Campbell Solicitors (Armagh) Ltd | Professional & scientific | 2009 |
| Gym Spec Ltd | Manufacturing | 2020 |
| H J Livestock Ltd | Agriculture & fishing | 2021 |
| H&H Freight Ltd | Transport & logistics | 2018 |
| H2 Flow Water Management Limited | Construction | 2018 |
| Haffey Holdings Ltd | Manufacturing | 2023 |
| Hair by T Limited | Other services | 2024 |
| Halliday Farms Ltd | Agriculture & fishing | 2014 |
| Halliday Transport Ltd | Transport & logistics | 2018 |
| Hamilton Road Freight Ltd | Transport & logistics | 2009 |
| Hamilton's Bawn Cultural Society | Other services | 2011 |
| Hanna Smyth Holdings Ltd | Construction | 2014 |
| Hannaway Construction Ltd | Construction | 2025 |
| Happy House Investments Ltd | Real estate | 2024 |
| Happy Hygge Holdings NI Ltd | Real estate | 2024 |
| Happy Kids Day Care Limited | Education | 2016 |
| Harker Appliances Ltd | Wholesale & retail | 2024 |
| Hartwood Property Group Ltd | Construction | 2025 |
| Harvey Auto Trading Ltd | Wholesale & retail | 2026 |
| Harvey Trees & Shrubs Ltd | Construction | 2009 |
| Haughey Motors Limited | Wholesale & retail | 2017 |
| HBA Distribution Ltd | Wholesale & retail | 2004 |
| HCX Services Ltd | Professional & scientific | 2025 |
| Heathermount Properties Limited | Real estate | 1998 |
| Heavenly House Ltd | Wholesale & retail | 2020 |
| Hendren Construction Ltd | Construction | 2022 |
| Hendren Electrical Ltd | Construction | 2012 |
| Henry Pearse Bespoke Joinery Ltd | Construction | 2011 |
| Hesmc Ltd | Financial services | 2023 |