| Flaxetta Limited | Energy | 2025 |
| Fleming Developments Limited | Real estate | 2001 |
| Floral Bliss Ltd | Wholesale & retail | 2012 |
| Flowercraft Limited | Wholesale & retail | 2025 |
| Floyds and Ballymagorry Arms Ltd | Hospitality | 2008 |
| FMC Construction Services Ltd | Construction | 2023 |
| Food Waste Diversion Limited | Water & waste | 2015 |
| Fountain Park Builders Ltd | Construction | 2018 |
| Foyle Pest Control Ltd | Administrative & support | 2025 |
| Foyle River-Catchment Outdoor Group (Frog) C.I.C. | Education | 2021 |
| Foyle View Farms Ltd | Agriculture & fishing | 2005 |
| Frank Wray Cars Limited | Wholesale & retail | 2021 |
| FRC Salutions Ltd | Agriculture & fishing | 2026 |
| Freelance Scaffolding Ltd | Construction | 2022 |
| Fresco Import Export Ltd | Wholesale & retail | 2025 |
| Friars 2 Go Strabane Limited | Hospitality | 2017 |
| Frylite Environmental Limited | Water & waste | 1997 |
| Frylite Limited | Manufacturing | 1996 |
| Furniturewise Ireland Ltd | Wholesale & retail | 2023 |
| Fusion Build Services Ltd | Professional & scientific | 2025 |
| FVW Ltd | Energy | 2023 |
| Fyfin Boilers Ltd | Wholesale & retail | 2020 |
| Fyfin Motors Ltd | Wholesale & retail | 2025 |
| Fyfin Properties Ltd | Construction | 2016 |
| G & S Farms Ltd | Agriculture & fishing | 2004 |
| G & T Safety Netting Ltd | Construction | 2021 |
| G O'Kane Contracts Ltd | Construction | 2018 |
| Gadget Garage Strabane Ltd | Other services | 2019 |
| Galdor Group Ltd | Wholesale & retail | 2024 |
| Gallagher's Home Limited | Construction | 2018 |
| Gallaghers Filling Station Ltd | Wholesale & retail | 2021 |
| Gallaghers International Removals & Storage Ltd | Extraterritorial | 2012 |
| Gary Devine | Professional & scientific | 2013 |
| GBC Ireland Ltd | Wholesale & retail | 2013 |
| GD Technical Consulting Services Ltd | Information & communication | 2023 |
| GDX Express Couriers Ltd | Transport & logistics | 2023 |
| GEM Travel Ltd. | Administrative & support | 2019 |
| Gibson Agri Limited | Wholesale & retail | 2005 |
| Giggles & Wiggles Childcare Limited | Health & social care | 2019 |
| Glebe Contracts Limited | Construction | 2017 |
| Glen Eden Management Company Limited | Real estate | 2006 |
| Glen Freeborn Services Ltd | Construction | 2013 |
| Glen Fresh Foods Ltd | Manufacturing | 2009 |
| Glen Parker Car Sales Ltd | Wholesale & retail | 2020 |
| Glenfin Electric Services (NI) Ltd | Construction | 2016 |
| Glenhead Beef Farm Ltd | Agriculture & fishing | 2018 |
| Glenmullin Ltd | Real estate | 2022 |
| Glenview Homes Ltd | Real estate | 2022 |
| Glenview Marketing Limited | Wholesale & retail | 2012 |
| Gleshy Holdings Limited | Mining & quarrying | 2021 |
| Glide 'N' Slide Trade Doors Limited | Manufacturing | 2018 |
| Globe Electrical Limited | Construction | 2021 |
| Gmac Contracts Ltd | Construction | 2022 |
| GMG Agri Sales Ltd | Wholesale & retail | 2015 |
| GMG Logos Ltd | Manufacturing | 2012 |
| GNE Controls Limited | Manufacturing | 2026 |
| Good Vibes Wellness Ltd | Health & social care | 2019 |
| Gortavea Enterprises Limited | Professional & scientific | 2012 |
| GR Scaffolding Ltd | Construction | 2017 |
| Graeme Campbell Contracts Ltd | Construction | 2017 |
| Grandon Properties Limited | Real estate | 2006 |
| Greenacres (NI) Ltd. | Administrative & support | 2012 |
| Greenacres Kennels (NI) Ltd | Other services | 2021 |
| Greene Building Materials Ltd | Wholesale & retail | 2021 |
| Greg Mitchell Motors Ltd | Wholesale & retail | 2007 |
| Gregory Sproule Gardening Services Ltd | Administrative & support | 2023 |
| Grow Consultancy Limited | Professional & scientific | 2011 |
| GSR Welding Ltd | Manufacturing | 2023 |
| Guerrilla Fitness Ltd | Education | 2021 |
| Guram Developments Limited | Real estate | 2020 |
| GWS Poultry Ltd | Agriculture & fishing | 2014 |
| H.O.T.T Haulage Ltd | Transport & logistics | 2025 |
| Hamilton Motors NW Limited | Wholesale & retail | 2020 |
| Hancon Trading Limited | Wholesale & retail | 2016 |
| Hannigan & Bishop XL Stop and Shop Ltd | Wholesale & retail | 2014 |
| Hapf Ltd | Real estate | 2021 |
| HAR Distribution Ltd | Wholesale & retail | 2020 |
| Harley Planning Consultants Limited | Construction | 2014 |
| Hawthorn Grove Management Company Limited | Real estate | 2007 |
| Hazelbank Enterprises Limited | Agriculture & fishing | 2007 |
| Hotel Lough Erne Ltd | Hospitality | 2021 |
| Hourican Associates Limited | Financial services | 2012 |
| Houston Precision Engineering (UK) Limited | Manufacturing | 2020 |
| Hummingbird (NI) C.I.C. | Professional & scientific | 2014 |
| Hurtlocker Fitness Limited | Arts & recreation | 2017 |
| I. Reid & Sons (Roofing Contractors) Ltd | Other services | 2011 |
| Ingleside Foods Limited | Hospitality | 2011 |
| Inishconnail Farm Limited | Agriculture & fishing | 2025 |
| Inside Outside Photography Ltd | Professional & scientific | 2021 |
| INSTALLS555 Ltd | Information & communication | 2023 |
| Investra Holding Ltd | Financial services | 2025 |
| Irish Property Investments Ltd | Real estate | 2024 |
| Ivape Strabane Ltd | Wholesale & retail | 2017 |
| J & C Mccrea Dairy Farm | Agriculture & fishing | 2013 |
| J & J Construction (NI) Limited | Construction | 2010 |
| J & J Construction (NW) Limited | Construction | 2025 |
| J & O Slieve Kirk (NI) Limited | Construction | 2026 |
| J Burns Tiling Ltd | Construction | 2024 |
| J C Haulage Ltd | Transport & logistics | 2018 |
| J Martin Cars & Commercials Ltd | Wholesale & retail | 2025 |