| Flight Gymnastics Academy C.I.C. | Arts & recreation | 2016 |
| Flowers of Belfast CIC | Education | 2023 |
| Flyrad Holdings Limited | Real estate | 2020 |
| Fnmni Ltd | Arts & recreation | 2023 |
| Foma Health Ltd | Other services | 2024 |
| Food Vision Systems Ltd | Information & communication | 2026 |
| Footcare (N.I.) Ltd | Manufacturing | 1997 |
| FOR Your Freedom & Ours C.I.C. | Education | 2017 |
| Forbes Neurology Services Limited | Health & social care | 2011 |
| Forsythe Residential Ltd | Real estate | 2021 |
| Fortress Doors Limited | Manufacturing | 2017 |
| Fortress Sefa LLP | | 2012 |
| Fortwilliam Accounting Ltd | Professional & scientific | 2025 |
| Fortwilliam Car Valeting Limited | Administrative & support | 2004 |
| Forty Five Squared Ltd | Wholesale & retail | 2025 |
| Foster Neal Holdings Ltd | Real estate | 2018 |
| Fosters Residential Ltd | Real estate | 2016 |
| Fountain House Glengormley Ltd | Hospitality | 2025 |
| FQP Limited | Real estate | 2018 |
| Freedom Financial Planning Ltd | Financial services | 2011 |
| Freightbridge Ltd | Transport & logistics | 2007 |
| Fresco BON Limited | Real estate | 2010 |
| Fresh Silver Ltd | Professional & scientific | 2022 |
| Friars Wood Limited | Real estate | 2016 |
| FSM Food Ltd | Hospitality | 2018 |
| Fullerton Financial Ltd | Financial services | 2021 |
| Future Solar Technologies Limited | Construction | 2024 |
| Future Times Estate Solutions Ltd | Real estate | 2024 |
| Fuze Consulting Limited | Professional & scientific | 2022 |
| Fuze Group Limited | Professional & scientific | 2022 |
| Fuze Property Ltd | Other services | 2022 |
| G Ashcroft and Co LLP | | 2007 |
| G Fit Gym Ltd | Arts & recreation | 2014 |
| G J Coast Ltd | Wholesale & retail | 2018 |
| G.B Fitness Studio Ltd | Arts & recreation | 2015 |
| G.B. Electrical & Building Contractors Ltd | Construction | 2012 |
| Gael Force Renewables Limited | Construction | 2011 |
| Gaffer (NI) Limited | Professional & scientific | 2007 |
| Gaffer Trading Limited | Professional & scientific | 1997 |
| Garden of Epicurus Limited | Education | 2020 |
| Gartlyn Limited | Real estate | 2024 |
| Gary Helm Logistics Limited | Transport & logistics | 2016 |
| GAS Design Solutions Limited | Construction | 2012 |
| GAS Tech Solutions N.I Ltd | Manufacturing | 2024 |
| GB Holdings Group Ltd | Financial services | 2021 |
| GC M & E Services Ltd | Construction | 2011 |
| GCW Consultancy Ltd | Professional & scientific | 2021 |
| GD Advisory Limited | Professional & scientific | 2022 |
| Gdipi Ltd | Real estate | 2019 |
| Gear of WAR Ltd. | Wholesale & retail | 2011 |
| Geeraff Limited | Wholesale & retail | 2020 |
| Gelwave Perk Ltd | Wholesale & retail | 2025 |
| Gemini Pubs Limited | Hospitality | 2006 |
| Gemprop 1A Ltd | Construction | 2020 |
| Gemprop Ltd | Construction | 2019 |
| Genesis Equipment Sales Limited | Wholesale & retail | 2023 |
| Getty Cleaning Services Limited | Administrative & support | 2013 |
| GF Trust Limited | Health & social care | 2022 |
| GG Hunt Holdings Limited | Real estate | 2025 |
| Ghstghstghst Ltd | Arts & recreation | 2023 |
| Gilchristcs Ltd | Manufacturing | 2012 |
| Gillespie Accountants Ltd | Professional & scientific | 2011 |
| Gilly Court Manor Ltd | Households | 2010 |
| Gilpins the Shop for MEN Limited | Extraterritorial | 1927 |
| Giraffe ATV Limited | Wholesale & retail | 2024 |
| Giraffe Materials Handling Limited | Wholesale & retail | 2022 |
| Giveaway Competitions Ltd | Arts & recreation | 2020 |
| Glam Revolution Ltd | Other services | 2023 |
| Glassies NI Limited | Manufacturing | 2015 |
| Glassies Property Maintenance Limited | Administrative & support | 2018 |
| Glaze and Frame Direct Ltd | Construction | 2026 |
| Glendale Court Property Management Company Ltd | Real estate | 2018 |
| Glengormley Amateur Boxing Club | Arts & recreation | 2005 |
| Glengormley Back Care Limited | Health & social care | 2012 |
| Glenmar Consultancy Ltd | Administrative & support | 2017 |
| Glide Innovation Ltd | Information & communication | 2023 |
| Glowcart Ltd | Wholesale & retail | 2024 |
| GNE Enterprises Ltd | Hospitality | 2023 |
| Go-Go Flower Rangers Ltd | Agriculture & fishing | 2025 |
| Golift Weightlifting Club | Arts & recreation | 2021 |
| Good Pizza Express Limited | Hospitality | 2024 |
| Gordons Jeanery Limited | Wholesale & retail | 2004 |
| Gorman Music Ltd | Administrative & support | 2021 |
| Gortroe Limited | Real estate | 2026 |
| Gough Property Holdings Ltd | Real estate | 2025 |
| Graeme Mccrum Limited | Construction | 2025 |
| Graham Steelworks & Engineering Ltd | Manufacturing | 2018 |
| Grange Limited | Real estate | 1996 |
| Graphical Data Limited | Information & communication | 2009 |
| Gray & Adams (Ireland) Limited | Manufacturing | 1982 |
| Green and Purple Door Ltd | Real estate | 2024 |
| Greenfish Power Limited | Financial services | 2025 |
| Greenhill Properties (NI) Limited | Real estate | 2013 |
| Greenisle Logistics Limited | Transport & logistics | 2026 |
| Greensparkle Solutions Ltd | Administrative & support | 2025 |
| Greenview Group Holdings Limited | Financial services | 2022 |
| Greenview Travel Limited | Transport & logistics | 2024 |
| Greg Campbell Civil Engineering Ltd | Construction | 2018 |
| Gretna Ltd | Wholesale & retail | 2018 |
| Grey Box Investments Limited | Real estate | 2023 |