| Gareth Mcbride & Co. Limited | Professional & scientific | 2023 |
| Gareth Mcfarland Interiors Limited | Professional & scientific | 2011 |
| Gareth Thompson Transport Limited | Transport & logistics | 2012 |
| Garfield Inns Limited | Hospitality | 2020 |
| Garlic Holdings Limited | Hospitality | 2026 |
| Garlic Trading Limited | Hospitality | 2026 |
| Garlor Limited | Arts & recreation | 2012 |
| Garma Advisory Limited | Professional & scientific | 2025 |
| Garment Graphixs Limited | Wholesale & retail | 2003 |
| Garnish NI Ltd | Manufacturing | 2025 |
| Garranard Park Management Company Limited | Households | 2015 |
| Garraroosky Wind Ltd | Energy | 2016 |
| Garren FM Ltd | Construction | 2024 |
| Garrett Estates Ltd | Real estate | 2018 |
| Garry Kelly Distribution Ltd | Transport & logistics | 2013 |
| Garrycloyne Management Limited | Professional & scientific | 2006 |
| Garvary Construction Limited | Construction | 2017 |
| Garvey Contracts Ltd | Construction | 2023 |
| Garvey Estate Management Limited | Households | 2006 |
| Garvey Studios Management Limited | Households | 2011 |
| Garvey's Bar Limited | Hospitality | 2017 |
| Garworth Ltd | Extraterritorial | 2019 |
| Gary Dyer Building Services Ltd | Construction | 2023 |
| Gary Hutchinson Car Sales Ltd | Wholesale & retail | 2016 |
| Gary Maxi Ltd | Health & social care | 2020 |
| Gary Mckibbin Preservation Limited | Extraterritorial | 2006 |
| Gary Robert Stoner Limited | Wholesale & retail | 2025 |
| Gary Woods Consulting Limited | Professional & scientific | 2009 |
| GAS Detection Ltd | Construction | 2020 |
| GAS Ireland Ltd | Energy | 2016 |
| GAS Stop Stores Limited | Wholesale & retail | 2018 |
| Gaspe Limited | Health & social care | 2011 |
| Gass Developments Limited | Real estate | 2017 |
| Gastech & Gear Limited | Wholesale & retail | 2015 |
| Gastrohub Group NI Ltd | Hospitality | 2025 |
| Gasworks Coffee House Limited | Hospitality | 2025 |
| Gate Ground Limited | Administrative & support | 2018 |
| Gatebeck Developments Limited | Real estate | 2007 |
| Gatekeeper PR Limited | Professional & scientific | 2015 |
| Gateley (NI) LLP | | 2009 |
| Gatewood Properties Limited | Households | 2001 |
| Gather Events U.K. Ltd | Hospitality | 2025 |
| Gato Property Ltd | Extraterritorial | 2023 |
| Gatsby International Ltd | Other services | 2016 |
| Gauge NI C.I.C. | Professional & scientific | 2010 |
| Gault and Chambers, Bullen Limited | Professional & scientific | 1995 |
| Gault Engineering Ltd | Professional & scientific | 2019 |
| Gavin Mcnamara Painting Ltd | Construction | 2023 |
| Gavin Reid Limited | Professional & scientific | 2003 |
| Gavin Transport Ltd | Transport & logistics | 2012 |
| Gawn Street Apartments Management Company Limited | Real estate | 2016 |
| Gaxiqi OTG Limited | Wholesale & retail | 2023 |
| Gayayitop Limited | Wholesale & retail | 2024 |
| GB (2018) Limited | Real estate | 2018 |
| GB Eurotech Ltd | Other services | 2025 |
| GB Protection Ltd | Financial services | 2024 |
| GBB Partnership Limited | Administrative & support | 2006 |
| GBK Investments Limited | Financial services | 2020 |
| GBL Productions Limited | Arts & recreation | 2005 |
| GBM Industrial Services Ltd | Administrative & support | 2015 |
| GBS Wholesale NI Limited | Wholesale & retail | 2024 |
| GC Coaching Academy LLP | | 2023 |
| GC Developments Belfast Ltd | Wholesale & retail | 2018 |
| GC Optics Limited | Extraterritorial | 2026 |
| GCF CI General Partner Limited | Financial services | 2023 |
| GCF CI LP | | 2023 |
| GCF General Partner Limited | Financial services | 2023 |
| GCG Consulting Limited | Administrative & support | 2022 |
| GCM Industrial Engineering (NI) Ltd | Professional & scientific | 2024 |
| Gcom Communications (NI) Limited | Information & communication | 2017 |
| GD Steelworks Ltd | Manufacturing | 2023 |
| Gdani Ltd | Agriculture & fishing | 2022 |
| Gday LP | | 2008 |
| GDC Property & Investments Ltd | Wholesale & retail | 2023 |
| GDL Drylining Contracts Limited | Construction | 2026 |
| GDP Capital Real Estate Ltd | Extraterritorial | 2013 |
| GDP Partnership Limited | Financial services | 2010 |
| GDP Real Estate Limited | Real estate | 2014 |
| GDR Electrical Services Limited | Construction | 2024 |
| GDS Contract Flooring Ltd | Construction | 2010 |
| Gdvnys Limited | Wholesale & retail | 2024 |
| GE Trading Limited | Professional & scientific | 2017 |
| Gealix Ltd | Information & communication | 2026 |
| Gear UP for Kids Ltd | Health & social care | 2025 |
| GEC Trading Ltd | Wholesale & retail | 2012 |
| Gecko Company Holdings Limited | Financial services | 2025 |
| Gecko Property Group Limited | Real estate | 2025 |
| Gedon Recruitment Group Ltd | Administrative & support | 2024 |
| GEE Leung Limited | Manufacturing | 2024 |
| Geematrix Solutions and Services Limited | Information & communication | 2026 |
| Geeric Technology Co Limited | Wholesale & retail | 2025 |
| Gege One Ltd | Hospitality | 2024 |
| GEKKO1 NI Ltd | Professional & scientific | 2025 |
| Gekkoshot Digital Ltd | Professional & scientific | 2019 |
| Gekkoshot Digital Media Ltd | Professional & scientific | 2023 |
| Gekkoshot Ltd | Professional & scientific | 2018 |
| Gelasius Limited | Real estate | 2016 |
| Gelish NI Distribution Limited | Other services | 2022 |
| GEM Interior Contracts Ltd | Construction | 2016 |
| GEM Site Services Ltd | Construction | 2023 |