| Garden Avenue Management Company Limited | Extraterritorial | 2000 |
| Garvros Glamping Ltd | Hospitality | 2025 |
| Gateway Holding (NI) Limited | Extraterritorial | 2005 |
| Gault International Ltd | Transport & logistics | 2024 |
| Gaultstown TEN Limited | Real estate | 2015 |
| Gcmd Grand North Limited | Wholesale & retail | 2025 |
| Gcsde Holding Limited | Construction | 2023 |
| GD Bricklaying Limited | Construction | 2018 |
| GEC (N.I.) Limited | Administrative & support | 2017 |
| GEM GW Ltd | Manufacturing | 2023 |
| Gemat Properties Limited | Real estate | 2020 |
| Gemat Signs Ltd | Manufacturing | 2018 |
| Genealogical Heritage Limited | Other services | 2024 |
| Geoffconwaytransportmanagement Ltd | Transport & logistics | 2022 |
| Geometry Civils Ltd | Construction | 2020 |
| George Peden Limited | Mining & quarrying | 1975 |
| GES Holdings Limited | Financial services | 2021 |
| Getty Trading Ltd | Arts & recreation | 2025 |
| Ghostbond UK Ltd | Other services | 2021 |
| Gibson Paving Limited | Construction | 2007 |
| Gillen Machine Tools Limited | Wholesale & retail | 1990 |
| Gillis Foods Limited | Wholesale & retail | 2018 |
| Gillis House Rentals Limited | Real estate | 2021 |
| Gilmore Engineering and Construction Ltd | Construction | 2021 |
| Gilmore Engineering Ltd | Construction | 2019 |
| Girassol | Wholesale & retail | 2009 |
| GJD Farms Limited | Agriculture & fishing | 2020 |
| Glamper Ltd | Administrative & support | 2020 |
| Glarryford Auctions Ltd | Wholesale & retail | 2026 |
| Glarryford Farmers' Hall Limited | Education | 2017 |
| Glarryford Properties Limited | Real estate | 2024 |
| Glenariff Forest Hideaways Ltd | Hospitality | 2022 |
| Glenarm Buildings Preservation Trust | Construction | 2004 |
| Glenarm Community Property Company Limited | Administrative & support | 1997 |
| Glenbuck Farm Ltd | Agriculture & fishing | 2022 |
| Glenbush Property Ltd | Real estate | 2026 |
| Glencloy Caravan Park Ltd | Hospitality | 2021 |
| Glencraig Development Limited | Real estate | 2010 |
| Glendun Nursing Home Limited | Health & social care | 2005 |
| Glenfield Renewables Ireland Ltd | Wholesale & retail | 2015 |
| Glengarry Holdings Ltd | Transport & logistics | 2025 |
| Glenmile Properties Limited | Financial services | 2021 |
| Glenn Sayers Contracting Limited | Information & communication | 2019 |
| Glenn Squared Ltd | Real estate | 2021 |
| Glenone Foods Ltd | Hospitality | 2024 |
| Glenone Properties Ltd | Households | 2024 |
| Glenravel & District Community & Residents Association | Other services | 2011 |
| Glenravel Community Development Association | Arts & recreation | 2006 |
| Glenravel Projects Limited | Real estate | 2024 |
| Glens Contracts Ltd | Construction | 2019 |
| Glens of Antrim Distillery Limited | Manufacturing | 2020 |
| Glens of Antrim GIN Ltd | Manufacturing | 2020 |
| Glens Plumbing and Heating Ltd | Construction | 2023 |
| Glenshesk Properties Limited | Real estate | 2007 |
| Glensway Limited | Hospitality | 2017 |
| Glenveagh Limited | Professional & scientific | 2021 |
| Glenview Farms Limited | Agriculture & fishing | 2010 |
| Glenview Holdings Limited | Financial services | 2019 |
| Glenvine Pet & Equine Crematorium Ltd | Professional & scientific | 2013 |
| Glenwherry Wind Limited | Energy | 2008 |
| Glenwillow Farms Ltd | Agriculture & fishing | 2023 |
| GLF Cycling Ltd | Wholesale & retail | 2022 |
| Gloonan Properties Limited | Real estate | 1998 |
| Glory BE Cafe Ltd | Hospitality | 2015 |
| GM Farrier Service Ltd | Agriculture & fishing | 2024 |
| GMC Car Transport Limited | Transport & logistics | 2018 |
| GMC Electrical Services (NI) Limited | Construction | 2026 |
| Gmdc Holdings Limited | Financial services | 2023 |
| Goat Competitions NI Ltd | Wholesale & retail | 2023 |
| Godmodex Ltd | Information & communication | 2014 |
| Gold Pine Property Ltd. | Real estate | 2016 |
| Golden Bamboo Ballymena Limited | Hospitality | 2026 |
| Golden City (Ballymena) Ltd | Hospitality | 2018 |
| Golden City Ahoghill Ltd | Hospitality | 2024 |
| Golden Palace Express Ltd | Hospitality | 2018 |
| Golden Salon Ltd | Other services | 2025 |
| Good Fortune Ballymena Limited | Hospitality | 2025 |
| Gordon Gourmet Foods Ltd | Wholesale & retail | 2019 |
| Gordons Technical Services Ltd | Administrative & support | 2017 |
| Gortgole Group Ltd | Information & communication | 2019 |
| GP Federation Support Unit Northern C.I.C. | Administrative & support | 2017 |
| GP Landscapes Ltd | Construction | 2023 |
| Gpgc Ltd | Financial services | 2025 |
| GPL Haulage Limited | Water & waste | 2016 |
| Gracehill Cleaning Services Ltd | Administrative & support | 2017 |
| Gracehill Developments Ltd | Real estate | 2022 |
| Graff Trading Ltd | Wholesale & retail | 2021 |
| Grafters Cafe (NI) Ltd | Hospitality | 2012 |
| Granagh Developments Limited | Real estate | 2013 |
| Granagh Holdings Limited | Real estate | 2022 |
| Granagh Homes Ltd | Real estate | 2020 |
| Granagh Trading Limited | Manufacturing | 2014 |
| Granaghan Holdings Ltd. | Administrative & support | 2019 |
| Grangemont Developments Ltd | Construction | 2018 |
| Grant's Electrical Services (N.I.) Limited | Manufacturing | 1977 |
| Graveside Innovations Limited | Other services | 2009 |
| Great JOB Logistics Limited | Transport & logistics | 2020 |
| Green Mars Ltd | Wholesale & retail | 2023 |
| Green Pastures Church | Other services | 2019 |
| Green Pastures, the People's Church | Other services | 2007 |