| Fernville Developments Limited | Construction | 2009 |
| Ferry Media Services Ltd | Information & communication | 2018 |
| Festive Motivation Ltd | Wholesale & retail | 2024 |
| FF Property Developments Ltd | Real estate | 2025 |
| Fhlgoodg Ltd | Wholesale & retail | 2025 |
| Fibre Reinforcement Consulting Ltd | Professional & scientific | 2022 |
| Field & Bean Imports Private Limited | Manufacturing | 2026 |
| Field Apothecary Ltd | Wholesale & retail | 2016 |
| Find Help NI CIC | Other services | 2019 |
| Finlay Electrical Ltd | Construction | 2021 |
| Finntec Electrical Ltd | Construction | 2021 |
| Finragh Holdings Ltd | Construction | 2020 |
| Fiord Holdings Ltd | Real estate | 2025 |
| Fiord Wind Ltd | Energy | 2016 |
| Fireside Innovation Ltd | Information & communication | 2025 |
| Firmus Engineering Ltd | Professional & scientific | 2025 |
| Firmus Group Holdings Ltd | Financial services | 2025 |
| Firmus Technology Ltd | Information & communication | 2020 |
| First Care 2022 Ltd | Health & social care | 2022 |
| Fishafy Ltd | Wholesale & retail | 2025 |
| Fit Feet Ltd | Professional & scientific | 2026 |
| Fitted Furniture Systems Ltd | Manufacturing | 2017 |
| Fitz Energy Limited | Energy | 2013 |
| Fitzjames Property Ltd | Real estate | 2025 |
| Five Sixty Holdings Ltd | Real estate | 2021 |
| Flex and Feast Ltd | Real estate | 2025 |
| Flightlab Technologies Ltd | Professional & scientific | 2017 |
| Florida Developments Ltd | Construction | 2017 |
| Flourish Dog Food NI Limited | Wholesale & retail | 2017 |
| Flyhigher Ltd | Wholesale & retail | 2023 |
| Focmsation Limited | Information & communication | 2025 |
| Folldal Hovden Limited | Manufacturing | 2023 |
| Foralink Ltd | Information & communication | 2024 |
| Forest House Management Company (NI) Limited | Extraterritorial | 2006 |
| Forest Twig Limited | Wholesale & retail | 2023 |
| Form & Flow Retreats Ltd | Other services | 2026 |
| Forward Financial Planning Ltd | Financial services | 1983 |
| Fossett International Ltd | Arts & recreation | 2019 |
| Foster 1501 Ltd | Professional & scientific | 2025 |
| Foster NI Properties Ltd | Real estate | 2023 |
| Founda Ttop Limited | Wholesale & retail | 2025 |
| Four Wheel Drive Club Northern Ireland Limited | Other services | 1997 |
| Four Zero - Tree Care Ltd | Administrative & support | 2021 |
| Frames Direct (NI) Limited | Manufacturing | 2014 |
| Frances Street Service Station Limited | Wholesale & retail | 2005 |
| Francis Ferguson Ltd | Wholesale & retail | 2025 |
| Frank Sieber Ltd | Wholesale & retail | 2023 |
| Fraser Ailsby Limited | Other services | 2024 |
| Freedom Mandate | Other services | 2020 |
| Freeman's Fuels Ltd | Wholesale & retail | 2019 |
| Freestyle Homes Ltd. | Real estate | 2010 |
| Frenzel Fanny Ltd | Wholesale & retail | 2024 |
| Frost Flow Solutions Ltd | Administrative & support | 2025 |
| Fucas Innovations Limited | Wholesale & retail | 2025 |
| Fullers Agencies Ltd | Wholesale & retail | 2018 |
| Fulton Samuel Richards Ltd | Real estate | 2011 |
| Functrain Ltd | Arts & recreation | 2025 |
| Funfriends Hot Limited | Wholesale & retail | 2025 |
| Funny Joy Limited | Wholesale & retail | 2024 |
| Fuse Systems LLP | | 2015 |
| Fusion Cleaning Ltd | Administrative & support | 2022 |
| G M W Electrical Distributors Ltd | Wholesale & retail | 2004 |
| G Martin Coaching NI Ltd | Arts & recreation | 2025 |
| G S Stothers Smoke Ventilation Specialists Ltd | Manufacturing | 2023 |
| G T Plates Ltd | Manufacturing | 2022 |
| G&F Aviation Ltd | Manufacturing | 2025 |
| G&G Logistics Ltd | Transport & logistics | 2024 |
| G.S. Stothers M&E Engineering Ltd | Construction | 2017 |
| G4 Logistics Ltd | Transport & logistics | 2025 |
| Gabiensirelandderetail Limited | Wholesale & retail | 2025 |
| Gaithouse Events Limited | Arts & recreation | 2019 |
| Galttech Ltd | Professional & scientific | 2015 |
| Galway Consulting Ltd | Professional & scientific | 2022 |
| Gangesfood Ltd | Hospitality | 2025 |
| Ganting Limited | Wholesale & retail | 2024 |
| Garden Rooms (N.I.) Ltd | Construction | 2011 |
| Gareth Fullerton Ltd | Wholesale & retail | 2024 |
| Gareth Roddy Building Ltd | Construction | 2019 |
| Garrison Paradecraft Ltd | Manufacturing | 2026 |
| GAS Industry Services Ltd. | Construction | 2018 |
| Gavwin Holdings Limited | Financial services | 2022 |
| GB Crusher Repairs Ltd | Manufacturing | 2011 |
| GEC Advisory Limited | Professional & scientific | 2025 |
| Gendi Moon Limited | Wholesale & retail | 2025 |
| Genggen Limited | Manufacturing | 2024 |
| Gentem Ltd | Construction | 2018 |
| Genuine Faith Ltd | Wholesale & retail | 2024 |
| George Best Enterprises Limited | Professional & scientific | 2010 |
| GH Software Ltd | Information & communication | 2015 |
| Ghazi SAF Limited | Wholesale & retail | 2025 |
| GI Computer Solutions Ltd | Information & communication | 2015 |
| Gibson Plus Ltd | Other services | 2003 |
| Gibson Plus Property Lets Ltd | Households | 2013 |
| Gigha Ltd | Construction | 2025 |
| Giles Tours Ltd | Administrative & support | 2024 |
| Gilmore Funeral Directors Limited | Other services | 2008 |
| Gilnahirk Boiler Services Ltd | Construction | 2026 |
| Gizmar Engineering Limited | Construction | 2013 |
| GK Vaping Company Ltd | Wholesale & retail | 2021 |
| Gktechnest Ltd | Wholesale & retail | 2025 |