| Gortfinbar Windfarm Limited | Professional & scientific | 2005 |
| Gortin Manor (2005) Management Company Ltd | Extraterritorial | 2006 |
| Gortland Mews Estates Limited | Extraterritorial | 1998 |
| Gortlee Holdings Limited | Construction | 2024 |
| Gortmullan Holdings Limited | Financial services | 2011 |
| Gortumly Hill Ltd. | Energy | 2012 |
| Gosford Investments Limited | Real estate | 2004 |
| Gosford Park Properties Ltd | Construction | 2020 |
| Goshen Placement Ltd | Professional & scientific | 2023 |
| Goshen Retailing Ltd | Wholesale & retail | 2014 |
| Gostand Limited | Wholesale & retail | 2016 |
| GOT2BUY Ltd | Wholesale & retail | 2021 |
| Gotf Services Limited | Wholesale & retail | 2017 |
| Gourmet Burgers Ireland Limited | Hospitality | 2008 |
| Governing Bodies Association (Northern Ireland)-The | Education | 2002 |
| Governors Gate Demesne Management Company Limited | Households | 2021 |
| Governors Gate Limited | Extraterritorial | 2014 |
| Gowanisf Holdings | Financial services | 2018 |
| Gowdy Plaster Boarding Ltd | Construction | 2026 |
| GOWIN2 Limited | Wholesale & retail | 2025 |
| Gowland Portavogie Management Company Limited | Households | 2020 |
| Gowska Vuiom Limited | Wholesale & retail | 2024 |
| GP (Belfast) & Co Ltd | Extraterritorial | 2022 |
| GP Creative Studios Limited | Professional & scientific | 2020 |
| GP Federation Support Unit C.I.C. | Administrative & support | 2015 |
| GP Motor Group NI Ltd | Wholesale & retail | 2025 |
| GPA Plumbing and Heating Solutions Ltd | Construction | 2018 |
| GPD Inns Ltd | Hospitality | 2024 |
| GPD Leisure Ltd | Other services | 2014 |
| GPD Tours Ltd | Arts & recreation | 2018 |
| GPH Tech Limited | Financial services | 2023 |
| Gpmh Ltd | Professional & scientific | 2019 |
| GPO Sculptors Ltd | Extraterritorial | 2018 |
| GPR Medical Limited | Professional & scientific | 2019 |
| Gprs,Trading,Ni Ltd | Construction | 2025 |
| GPS Gardening and Property Services Ltd | Professional & scientific | 2021 |
| GR Ingram & Co. Solicitors Limited | Professional & scientific | 2009 |
| Grab & Go 1 Limited | Wholesale & retail | 2019 |
| Grabngogrub Limited | Hospitality | 2023 |
| Grace Abiola Phillips Ltd | Administrative & support | 2021 |
| Grace Clothing Ltd | Wholesale & retail | 2023 |
| Grace Contracting Ltd | Construction | 2019 |
| Grace CRA Ltd | Wholesale & retail | 2024 |
| Grace Gourmet Ltd | Hospitality | 2025 |
| Grace James Design Limited | Wholesale & retail | 2016 |
| Grace Love Health Care Limited | Administrative & support | 2022 |
| Grace Stone Healthcare Limited | Administrative & support | 2025 |
| Grace Women's Development Limited | Health & social care | 2012 |
| Graceful Feelings Ltd | Wholesale & retail | 2024 |
| Graceh SFD Ltd | Wholesale & retail | 2023 |
| Gracehill Consulting Limited | Professional & scientific | 2025 |
| Gracehill Facilities Limited | Administrative & support | 2022 |
| Gracehill Management Company Limited | Households | 2006 |
| Gracehill Property Developments Ltd | Real estate | 2013 |
| Gracehill Property Investments Limited | Real estate | 2023 |
| Gracehill UK Limited | Construction | 2021 |
| Gracemount Engineering Limited | Professional & scientific | 2007 |
| Gracemount Enterprises Limited | Hospitality | 1984 |
| Graceton Media Limited | Administrative & support | 2019 |
| Gradient Edge Ltd | Information & communication | 2018 |
| Graffan NO. 1 Limited | Financial services | 2013 |
| Graffan Properties Limited | Hospitality | 1977 |
| Graham & SON Ltd | Wholesale & retail | 2007 |
| Graham and Daughters Ltd | Construction | 2007 |
| Graham Crichton Photography Limited | Professional & scientific | 2021 |
| Graham Developments (N.I.) Limited | Construction | 2018 |
| Graham Management Ltd | Construction | 2016 |
| Graham Mccomb Design Limited | Professional & scientific | 1998 |
| Graham Property & Land Limited | Real estate | 2019 |
| Graham Publishing Limited | Information & communication | 2021 |
| Graham Wallace Plumbing & Heating Ltd | Other services | 2017 |
| Graham Wealth and Investments Limited | Financial services | 2021 |
| Graham Wealth Holdings Limited | Administrative & support | 2022 |
| Grahamsbridge Limited | Hospitality | 2015 |
| Grain Peaks Limited | Manufacturing | 2023 |
| Grainne O'Halloran Ltd | Professional & scientific | 2021 |
| Grainstin Limited | Wholesale & retail | 2023 |
| Gramco Limited | Information & communication | 2011 |
| Grammatology Limited | Education | 2017 |
| Gran LAB Limited | Professional & scientific | 2024 |
| Granagh Properties Limited | Construction | 2006 |
| Granaghan Contracts Limited | Construction | 1992 |
| Grand Financial Services UK Limited | Information & communication | 2025 |
| Grand Kadoo RUM Company Limited | Wholesale & retail | 2020 |
| Grand Manor Group Ltd | Real estate | 2025 |
| Grand Opera House Trust | Arts & recreation | 1994 |
| Grand Prix Mews Management Company Limited | Households | 2005 |
| Grand Scale Group Limited | Financial services | 2022 |
| Grand Scale Marketing Ltd | Professional & scientific | 2020 |
| Grand Scale Pro Limited | Professional & scientific | 2022 |
| Grande Cafe Trading Limited | Hospitality | 2026 |
| Grande Commerce Ltd | Wholesale & retail | 2025 |
| Grandholm Ltd | Wholesale & retail | 2025 |
| Grandi Stefano Ltd | Wholesale & retail | 2025 |
| Grandvale Limited | Real estate | 2018 |
| Grange Edge Limited | Construction | 2024 |
| Grange Printing & Office Services Ltd | Real estate | 2005 |
| Granite (Holdings) Limited | Financial services | 1995 |
| Granite Properties Limited | Construction | 1995 |
| Granmarq Limited | Manufacturing | 2015 |