| Funmake Today Limited | Wholesale & retail | 2025 |
| Funtastic Play Ltd | Arts & recreation | 2012 |
| Funteron Limited | Information & communication | 2025 |
| Funtime Creations Ltd | Administrative & support | 2001 |
| Funuo Trade Hongkong Limited | Wholesale & retail | 2025 |
| FUR Feast Candy Ltd | Wholesale & retail | 2025 |
| Furama (Antrim) Limited | Hospitality | 2022 |
| Furbies N.I. Limited | Other services | 2024 |
| Furnisher House Management Company Limited | Households | 2020 |
| Furniture Hub Coleraine Ltd | Wholesale & retail | 2016 |
| Furniture Rescue Ltd | Other services | 2014 |
| Furniture Trends Ltd | Wholesale & retail | 2009 |
| Furoasis Ltd | Wholesale & retail | 2024 |
| Furprime Ltd | Wholesale & retail | 2024 |
| Further Space Limited | Hospitality | 2017 |
| Furwinds Grooming Studio Ltd | Other services | 2026 |
| Fury Healthcare Ltd | Financial services | 2019 |
| Fusco Ice Cream (N.I.) Ltd | Manufacturing | 2016 |
| Fuse Fire & Security Ltd | Construction | 2020 |
| Fusion Antibodies PLC | Professional & scientific | 2000 |
| Fusion Robes Ltd | Wholesale & retail | 2013 |
| Futsal Federation Northern Ireland Limited | Arts & recreation | 2021 |
| Future (Wind GEN) Limited | Energy | 2011 |
| Future Aero Concepts Limited | Transport & logistics | 2014 |
| Future Best Limited | Wholesale & retail | 2024 |
| Future Fashion Design Limited | Wholesale & retail | 2025 |
| Future Focused Financial Ltd | Administrative & support | 2023 |
| Future Healthcare (N.I.) Ltd | Information & communication | 2011 |
| Future Plumbing Heating NI Ltd | Construction | 2022 |
| Future Ready Career Limited | Education | 2021 |
| Future Ready LAB Ltd | Information & communication | 2025 |
| Future Restaurants Ltd | Hospitality | 2024 |
| Future Sustainable Foods Ltd | Manufacturing | 2023 |
| Futurofirma Sustainability Consulting Limited | Professional & scientific | 2008 |
| Fuyinfu Limited | Wholesale & retail | 2023 |
| Fuzzydelight Ltd | Wholesale & retail | 2024 |
| FW Science Ltd | Wholesale & retail | 2020 |
| FWD Ecommerce Limited | Professional & scientific | 2023 |
| FX Belfast Limited | Households | 2018 |
| Fx.S.N Ltd | Financial services | 2024 |
| FX4 Enterprise Ltd | Wholesale & retail | 2012 |
| FY Focus Ltd | Health & social care | 2023 |
| FYD Group Ltd | Wholesale & retail | 2026 |
| Fyltrd Limited | Information & communication | 2021 |
| Fyth Holdings Limited | Extraterritorial | 2020 |
| Fzmxmt Limited | Wholesale & retail | 2024 |
| Féinics Education & Heritage | Education | 2025 |
| Féinics Productions Ltd | Information & communication | 2025 |
| G & a Holdings (2022) Ltd | Other services | 2022 |
| G & Co Medical Ltd | Health & social care | 2024 |
| G & E Contracts (2020) Ltd | Construction | 2020 |
| G & JA Holdings Ltd | Real estate | 2021 |
| G & K Reid Limited | Construction | 2013 |
| G & L Simpson Limited | Wholesale & retail | 2001 |
| G & M Investments Limited | Real estate | 1988 |
| G & P Group N.I. Ltd | Hospitality | 2025 |
| G & S Auto Sales Ltd | Wholesale & retail | 2025 |
| G & S Courier Services Ltd | Transport & logistics | 2012 |
| G & S Hair Limited | Other services | 2023 |
| G & S Tanning Ltd | Other services | 2024 |
| G & T Beacom Limited | Wholesale & retail | 2014 |
| G & T Holdings (N.I.) Limited | Financial services | 2020 |
| G and C Hospitality Ltd | Hospitality | 2019 |
| G C Electrical (2020) Ltd | Construction | 2020 |
| G C Electrical Belfast Ltd | Construction | 2023 |
| G C Grab Hire Limited | Administrative & support | 2015 |
| G C Management (Belfast) Limited | Households | 2003 |
| G C Properties N.I. Ltd | Construction | 2025 |
| G Cleaning Ltd | Administrative & support | 2020 |
| G D Catering (2018) Ltd | Hospitality | 2018 |
| G E Hygiene Supplies Limited | Wholesale & retail | 2016 |
| G G Traders Ltd | Wholesale & retail | 2019 |
| G H Advisory Services Ltd | Professional & scientific | 2019 |
| G K Aesthetics (2018) Ltd | Other services | 2018 |
| G L S C Consulting Limited | Information & communication | 2007 |
| G M Developments (NI) Ltd | Construction | 2005 |
| G Maher Design Ltd | Wholesale & retail | 2024 |
| G Muldoon Ltd | Wholesale & retail | 2011 |
| G N Contracts Ltd | Construction | 2025 |
| G S Gordon & Sons LLP | | 2005 |
| G T Auto's (NI) Limited | Wholesale & retail | 2013 |
| G&D Rooney Limited | Wholesale & retail | 2015 |
| G&F Electrical Limited | Construction | 2025 |
| G&G Haulage Consultants Limited | Professional & scientific | 2026 |
| G&G Immobiliare Limited | Real estate | 2016 |
| G&H Playtime Partners Ltd | Education | 2024 |
| G&I Global Ltd | Other services | 2024 |
| G&J Kennedy Project Management LLP | | 2020 |
| G&M Builders (NI) Limited | Construction | 2013 |
| G&M Logic Ltd | Information & communication | 2024 |
| G&M Properties (Belfast) Ltd | Real estate | 2016 |
| G&M Rock Limited | Hospitality | 2017 |
| G-Cybersec Limited | Information & communication | 2022 |
| G-Dec Consultancy Ltd | Professional & scientific | 2025 |
| G. Heyn & Sons Limited | Transport & logistics | 1946 |
| G. P. Williams Limited | Wholesale & retail | 1999 |
| G. Posnett & SON. Limited | Wholesale & retail | 1971 |
| G. Watters Ltd | Wholesale & retail | 2006 |
| G. Watters Property Ltd | Real estate | 2025 |
| G.A.T. Developments Limited | Construction | 2004 |