| FJM Estates Ltd | Real estate | 2018 |
| Flarrs Limited | Wholesale & retail | 2023 |
| Fleet Lease IRE Ltd | Administrative & support | 2026 |
| Fleet Maintenance Holdings Ltd | Financial services | 2025 |
| Fleet Maintenance Ireland Ltd | Manufacturing | 2004 |
| Flexion Fitness Ltd | Other services | 2018 |
| Flexion Tanning Ltd | Other services | 2020 |
| Flexx International Limited | Wholesale & retail | 2015 |
| Flowkat Limited | Other services | 2011 |
| Flush Contract Services Limited | Administrative & support | 2019 |
| Fluxion Automation Ltd | Manufacturing | 2025 |
| Fluyd Sport Ltd | Information & communication | 2025 |
| Flynn & Company Accountants Limited | Professional & scientific | 2010 |
| FNJ (NI) Limited | Transport & logistics | 2014 |
| Focus Gyms Ltd | Arts & recreation | 2014 |
| Focus Hybrid Ltd | Other services | 2022 |
| Folio Property Services Ltd | Real estate | 2015 |
| Foma 2023 Ltd | Real estate | 2023 |
| Fonz Xpert Ltd | Wholesale & retail | 2024 |
| Food Hall Coleraine Ltd | Wholesale & retail | 2025 |
| Foodhall Craigavon Limited | Wholesale & retail | 2025 |
| Foodhalls Group Ltd | Wholesale & retail | 2024 |
| Football FUN Factory (Community 100) Limited | Arts & recreation | 2023 |
| Football FUN Factory (Community 101) Limited | Arts & recreation | 2023 |
| Forde Gardens Management Company Limited | Households | 2018 |
| Forge Hill Close Management Limited | Households | 2008 |
| Forge Horsetrucks Ltd | Professional & scientific | 2026 |
| Fort Afton Ltd | Real estate | 2024 |
| Fortbeau Park Management (NI) Limited | Households | 2023 |
| Forthill Animals & Carriages Ltd | Agriculture & fishing | 2017 |
| Foster's Fast Foods Ltd | Hospitality | 2019 |
| Fotw Software Consulting Limited | Information & communication | 2016 |
| FOX AV Ltd | Administrative & support | 2021 |
| FOX Fabrication & Cutting Services Limited | Professional & scientific | 2025 |
| FOX Retail Services Ltd | Professional & scientific | 2021 |
| Foxleigh Wood Management Company Limited | Households | 2017 |
| Foxwood Lurgan Block 1 Management Ltd | Households | 2023 |
| Foxwood Lurgan Management Ltd | Households | 2021 |
| Foymore Lodge Shooting School Ltd | Arts & recreation | 2005 |
| Fracto Services Ltd | Information & communication | 2024 |
| FRC Recruitment and Consultancy Ltd | Administrative & support | 2025 |
| Freed Beyond CIC | Health & social care | 2024 |
| French 44 Properties Limited | Real estate | 2022 |
| French Properties Limited | Real estate | 2017 |
| Fresh POP Limited | Administrative & support | 2016 |
| Friarsglen Limited | Hospitality | 2006 |
| Fridge Care Ltd | Manufacturing | 2022 |
| Friendly Faces Entertainment Ltd | Arts & recreation | 2020 |
| Friends Medical Service Limited | Wholesale & retail | 2020 |
| Friends of Africa Missionary Endeavour Limited | Other services | 1999 |
| Frontline Prophetic Ministries | Other services | 2025 |
| Frost and Hamilton LLP | | 2017 |
| Fuel Hive Limited | Hospitality | 2025 |
| Fultons Furnishings Ltd | Wholesale & retail | 2014 |
| Funeralsonline Limited | Information & communication | 2014 |
| Funky Eats Chip Shop Ltd | Hospitality | 2025 |
| Furlong Equipment Services Limited | Wholesale & retail | 2021 |
| Furniq UK Ltd | Wholesale & retail | 2021 |
| Fuzzbuttz Ltd | Agriculture & fishing | 2018 |
| Fíor Films Ltd | Information & communication | 2025 |
| G & I Contracts Ltd. | Construction | 2015 |
| G Gate Properties US Ltd | Real estate | 2022 |
| G H Black Ltd | Wholesale & retail | 2016 |
| G Killough Contracts Ltd | Construction | 2005 |
| G R Hilary Ltd | Wholesale & retail | 2019 |
| G T Gobal Solutions Limited | Manufacturing | 2022 |
| G&A Couriers Ltd | Transport & logistics | 2021 |
| G&Db Properties Limited | Real estate | 2025 |
| G. Bell Moira Ltd | Wholesale & retail | 2024 |
| G. S. Agencies Ltd | Administrative & support | 2013 |
| G.F. Services Limited | Real estate | 1992 |
| G.H. Electrics (NI) Ltd | Construction | 2008 |
| G.O.N Property Development Limited | Real estate | 2021 |
| G2 Media Ltd | Wholesale & retail | 2009 |
| Gabal Properties Ltd | Real estate | 2025 |
| Gabba Collection Ltd | Wholesale & retail | 2025 |
| Gaelic Mystery Kits Ltd | Wholesale & retail | 2024 |
| Galibiervelo Ltd | Wholesale & retail | 2021 |
| Gallery Coffee Ltd | Hospitality | 2024 |
| Gallrock Consultancy Limited | Professional & scientific | 2022 |
| Gallrock Consulting Limited | Other services | 2026 |
| Galvani Electrical Ltd | Construction | 2017 |
| Game Groom Ltd | Other services | 2025 |
| Gameonjuice Ltd | Wholesale & retail | 2020 |
| Garden Aids Ltd | Wholesale & retail | 2013 |
| Gardening Fencing and Landscaping Ltd | Administrative & support | 2025 |
| Gardiner K Limited | Wholesale & retail | 2024 |
| Gareeclend Labradors and RAW Pet Foods Limited | Agriculture & fishing | 2018 |
| Garlic and Thyme Ltd | Hospitality | 2024 |
| Garment Doctor (NI) Limited | Other services | 2009 |
| Garrick Hill Estates Limited | Real estate | 2018 |
| Gary Mccleary & Co. Ltd | Health & social care | 2009 |
| Gateway International Limited | Professional & scientific | 2025 |
| GC 94 Ltd | Hospitality | 2018 |
| GC Business Improvement Services Limited | Education | 2018 |
| GC Flues and Fires Limited | Wholesale & retail | 2017 |
| GC Late Night Ventures Ltd | Real estate | 2025 |
| GCD Technologies Ltd | Information & communication | 2007 |
| GCT Media Ltd | Information & communication | 2023 |
| Gday (NI) 2018 Limited | Professional & scientific | 2018 |