| Fermac Developments Limited | Construction | 1995 |
| Fermac Properties Limited | Construction | 1992 |
| Fern Shop Ltd | Wholesale & retail | 2026 |
| Fernwater Contracts Ltd | Construction | 2016 |
| FGC Bricklaying Ltd | Construction | 2024 |
| Fhnh Property Ltd | Real estate | 2022 |
| Fiesta Blinds & Fabrics Limited | Manufacturing | 1995 |
| Fiesta MKB Renewables Ltd | Construction | 2023 |
| Fiesta Spas Ltd | Wholesale & retail | 2023 |
| Fine Line Academy Ltd | Education | 2024 |
| Finmondo Limited | Information & communication | 2018 |
| Finnzara UK Limited | Professional & scientific | 2023 |
| Fireglass Direct NI Ltd | Manufacturing | 2019 |
| Fisner Repair Solutions Ltd | Construction | 2012 |
| Fit for Purpose Specialist Joinery Fitting Ltd | Construction | 2021 |
| Fitzwilliam Projects Ltd | Real estate | 2021 |
| Five Star Supreme Ltd | Administrative & support | 2007 |
| Fix-A-Ton Limited | Construction | 2013 |
| Fjmj Propco Ltd | Real estate | 2024 |
| Flair Fitness & Leisure Ltd | Wholesale & retail | 2021 |
| Flanagan Properties Limited | Real estate | 2016 |
| Flowdesigner Limited | Professional & scientific | 2022 |
| Fluidflowdesigner Limited | Professional & scientific | 2022 |
| FMA Consultancy Ltd | Professional & scientific | 2023 |
| Fmac Construction Limited | Construction | 2017 |
| Fore Fathers Limited | Arts & recreation | 2021 |
| Forge Car and Commercial Sales Ltd | Wholesale & retail | 2020 |
| Fortis Coaching Academy Ltd | Education | 2025 |
| Fortis Training Systems Ltd | Arts & recreation | 2025 |
| Fosters Store City Centre Limited | Wholesale & retail | 2014 |
| Fotoshop Ltd | Other services | 2025 |
| FOX Healthcare Solutions Ltd | Health & social care | 2025 |
| Foyle Cladding & Roofing Solutions Ltd | Construction | 2020 |
| Foyle Cloud Consulting Ltd | Information & communication | 2021 |
| Foyle Community Care Ltd | Health & social care | 2025 |
| Foyle Down Syndrome Trust Limited | Other services | 2000 |
| Foyle Financial Ltd | Financial services | 2018 |
| Foyle Friends of Ukraine CIC | Other services | 2022 |
| Foyle Language Services Ltd | Professional & scientific | 2000 |
| Foyle Mechanical Services Ltd | Construction | 2022 |
| Foyle Parents & Friends Association | Health & social care | 2014 |
| Foyle Property Hub Ltd | Real estate | 2026 |
| Foyle River Gardens | Administrative & support | 2018 |
| Foyle Soccer Services Ltd | Administrative & support | 2003 |
| Foyle Taxis Limited | Transport & logistics | 2007 |
| Foyle Travel Limited | Real estate | 2003 |
| Foyle Vineyard Church | Other services | 2017 |
| Foylemore Oysters Limited | Agriculture & fishing | 2013 |
| Foyleside Autos Ltd | Wholesale & retail | 2023 |
| Foyleside Developments Ltd | Administrative & support | 2021 |
| Foyleside Tyres Limited | Wholesale & retail | 2020 |
| Friendly Financial Limited | Financial services | 2017 |
| Fuel Preparations (International) Limited | Wholesale & retail | 1993 |
| Fuel Strong Project Ltd | Manufacturing | 2025 |
| Furniture Plus (Derry) Ltd | Wholesale & retail | 2019 |
| Fusion-Ni Ltd | Professional & scientific | 2020 |
| Future Cuisine Ltd | Hospitality | 2009 |
| G & E Doherty Cars (N.I.) Ltd | Wholesale & retail | 2017 |
| G Irwin Holdings Ltd | Real estate | 2025 |
| G3G HC Limited | Financial services | 2021 |
| G63 Medical Limited | Health & social care | 2025 |
| Galaxy Allstars Limited | Arts & recreation | 2017 |
| Galfield Limited | Wholesale & retail | 2003 |
| Galliagh Community Centre | Administrative & support | 2021 |
| Galliagh Mobile Shop Ltd | Wholesale & retail | 2024 |
| Galmere Fresh Foods (UK) Limited | Wholesale & retail | 2025 |
| Game Ready Rentals Ireland Ltd | Health & social care | 2026 |
| Gasta AI Ltd | Information & communication | 2026 |
| Gavin Johnston Painting & Decorating Ltd | Construction | 2025 |
| GCU (UK) Limited | Construction | 2013 |
| Gemandate Ltd | Hospitality | 2012 |
| Gemx Limited | Manufacturing | 2024 |
| George Gill & Sons Construction (NI) Limited | Construction | 2019 |
| Gerard Doherty Plastering Limited | Construction | 2018 |
| Gerard Mcgrath Trading Limited | Construction | 2025 |
| Gerrard Cowan Limited | Information & communication | 2021 |
| GF Oils & Sauces Limited | Wholesale & retail | 2013 |
| Gifted Live (NI) Limited | Information & communication | 2012 |
| Gill (Fishing Enterprises) Limited | Agriculture & fishing | 2017 |
| Gl&D Trading Ltd | Hospitality | 2025 |
| GLA Enterprises Limited | Wholesale & retail | 2022 |
| GLA Property & Developments Limited | Construction | 2024 |
| GLA Surveyors Limited | Professional & scientific | 2015 |
| Glassaigh Properties Ltd | Real estate | 2025 |
| Glasán Irish Sea Moss Ltd | Manufacturing | 2024 |
| Glen Development Initiative | Other services | 2006 |
| Glen Farm Ltd | Real estate | 2020 |
| Glen Road Holdings Limited | Construction | 2014 |
| Glen Road Properties Limited | Construction | 2014 |
| Glenamoyle Farms Limited | Agriculture & fishing | 2018 |
| Glenard Developments Limited | Real estate | 1997 |
| Glenbar Management Company Limited | Real estate | 2026 |
| Glenlark Limited | Administrative & support | 2014 |
| Glenmac Developments Limited | Construction | 2015 |
| Glenowen Fisheries Workers Co-Op Ltd | Arts & recreation | 1988 |
| Glenside Engineering Limited | Construction | 2013 |
| Glentin Ltd | Extraterritorial | 2004 |
| Glentogher Ltd | Real estate | 2018 |
| Glentown Stone Limited | Mining & quarrying | 2013 |
| Global Donations Foundation | Information & communication | 2018 |