| Gemin Construction Ltd | Construction | 2008 |
| Gemin Properties Ltd | Real estate | 2004 |
| Gemini BSA Property Investments Limited | Real estate | 2021 |
| Gemini Consultancy Services Ltd | Professional & scientific | 2022 |
| Gems NI Property Limited | Administrative & support | 2006 |
| Gems Northern Ireland Ltd | Information & communication | 2006 |
| Gen-Sol Healthcare Ltd | Health & social care | 2023 |
| Genba IT Limited | Information & communication | 2017 |
| Genblue Emea Ltd | Wholesale & retail | 2024 |
| Gencom Inter L.P. | | 2017 |
| Genedrive Diagnostics (NI) Limited | Professional & scientific | 2025 |
| GENER8DEMAND Limited | Professional & scientific | 2024 |
| General Banter Productions Ltd | Information & communication | 2019 |
| General Luck Trading Ltd | Wholesale & retail | 2024 |
| Generation Well Ltd | Education | 2022 |
| Generation Women Limited | Administrative & support | 2016 |
| Generator and Winding Services NI Ltd | Manufacturing | 2022 |
| Generatr Limited | Information & communication | 2022 |
| Generic Alternatives Limited | Wholesale & retail | 2025 |
| Generous Juan Ltd | Wholesale & retail | 2024 |
| Genesis Advertising Limited | Professional & scientific | 1992 |
| Genesis Autos NI Ltd | Wholesale & retail | 2024 |
| Genesis Geotechnics Ltd | Manufacturing | 2022 |
| Genesis Network | Administrative & support | 2021 |
| Genesis Photovoltaic Limited | Energy | 2020 |
| Genesis PV Solutions Limited | Energy | 2020 |
| Genesis Telecom Limited | Wholesale & retail | 2011 |
| Genesync Ltd | Professional & scientific | 2025 |
| Genie Consultants Ltd | Administrative & support | 2026 |
| Genie Management Ltd | Administrative & support | 2019 |
| Genisys Tech Ltd | Wholesale & retail | 2024 |
| Genius Boards Ireland Limited | Professional & scientific | 2025 |
| Genmax Services Limited | Professional & scientific | 2021 |
| Genoa Cafe Limited | Hospitality | 2007 |
| Genome Diagnostics Ltd | Professional & scientific | 2020 |
| Genomic Mining Limited | Extraterritorial | 2001 |
| Gensaf Limited | Professional & scientific | 2013 |
| Gentlespark Cleaning Services Ltd | Administrative & support | 2025 |
| Gentstre Limited | Wholesale & retail | 2017 |
| Genuine Parts Direct Ltd | Wholesale & retail | 2022 |
| GEO Security Services Limited | Administrative & support | 2023 |
| Geodale Consulting Limited | Administrative & support | 2015 |
| Geoff Mcconville Opticians Limited | Wholesale & retail | 2004 |
| Geoham Limited | Professional & scientific | 2005 |
| Geolytical Limited | Information & communication | 2013 |
| Geoman Limited | Construction | 2005 |
| George Buick Ltd | Wholesale & retail | 2025 |
| George C Services (NI) Limited | Construction | 2019 |
| George Hamilton Linda Hamilton Ltd | Wholesale & retail | 2022 |
| George Hobday & Sons Ltd | Other services | 2010 |
| George Johnston Roofing Limited | Construction | 2020 |
| George Limited | Hospitality | 1998 |
| George Savage Ltd | Manufacturing | 2022 |
| George Tumilson Limited | Manufacturing | 2019 |
| Geosearch International Ltd | Professional & scientific | 1997 |
| Geotech Construction Limited | Mining & quarrying | 2006 |
| GEP Media Ltd | Information & communication | 2019 |
| Geqogn Ltd | Wholesale & retail | 2025 |
| Geraghty Holdings (N.I.) Ltd | Financial services | 2023 |
| Geraldine O'Hare Consultancy Limited | Professional & scientific | 2022 |
| Gerard Anthony Champion Ltd | Extraterritorial | 2025 |
| Gerard Brennan Limited | Transport & logistics | 2018 |
| Gerard Mcpeake Architectural Ltd | Professional & scientific | 2011 |
| Geras Training Ltd | Education | 2023 |
| Germac Filtration Services Limited | Manufacturing | 1978 |
| German Motor Specialists Servicing Limited | Wholesale & retail | 2015 |
| Germinal GB Limited | Wholesale & retail | 1967 |
| Germinal Pension Trustees Limited | Financial services | 1981 |
| Geronimo Pictures Ltd | Information & communication | 2005 |
| Geronimo Project Ltd | Hospitality | 2019 |
| Gerry Mcmanus Plant Hire Ltd | | 2000 |
| Gersemi Ltd | Real estate | 2021 |
| Gesfitec Limited | Professional & scientific | 1990 |
| GET Cozy Ltd | Wholesale & retail | 2025 |
| GET Found Online Limited | Professional & scientific | 2016 |
| GET Fresh (N.I.) Limited | Real estate | 2007 |
| GET OUT Records LLP | | 2010 |
| GET That Trend UK Ltd | Wholesale & retail | 2022 |
| Getskills NI Accounting Limited | Professional & scientific | 2026 |
| Getsociable Ltd | Information & communication | 2020 |
| Getty Music Limited | Information & communication | 1999 |
| Gewor Trading LLP | | 2014 |
| GF & HK Ltd | Other services | 2026 |
| GF & MF Limited | Professional & scientific | 2014 |
| GF Tech Ltd | Information & communication | 2021 |
| GFA Films Ltd | Information & communication | 2022 |
| GFC 1882 Limited | Arts & recreation | 2019 |
| GFC Services Ltd | Manufacturing | 2015 |
| GFF CI GP Limited | Financial services | 2018 |
| GFF CI LP | | 2018 |
| GFJ Belfast Ltd | Hospitality | 2023 |
| GFK Ltd | Professional & scientific | 2015 |
| GFM Development Ltd | | 2006 |
| Gfms Holdings Ltd | Administrative & support | 2020 |
| GG Cedar Ltd | Real estate | 2025 |
| GG Cuisine Callender ST Ltd | Hospitality | 2023 |
| GG Cuisine GVT ST Ltd | Hospitality | 2023 |
| GG Patterson Joinery Ltd | Construction | 2025 |
| GGB Skiphire and Rubbish Removal Van MAN Ltd | Water & waste | 2024 |
| GGC Contracts Ltd | Manufacturing | 2026 |