| LGLisagallon Group Roscommon, IrelandEnergy, Utilities & Waste Treatment | Construction work Installation services (except software) Cable Installation Cable Recovery Fibre Optic Installation | |
| EGEirGrid Group Dublin, IrelandEnergy, Utilities & Waste Treatment | Construction work Installation services (except software) Electricity Transmission System Operator Manage The Flow Of Power Electricity Grid | |
| CCIET Belmullet, IrelandEnergy, Utilities & Waste Treatment | Construction work Installation services (except software) Power Line Services Utility Infrastructure | |
| GPGannon Properties Dublin, IrelandReal Estate | Construction work Real estate services Home Building New Homes Family Homes | |
| GNGrid Network Services – Power Related Infrastructure Athlone, IrelandEnergy, Utilities & Waste Treatment | Construction work Installation services (except software) | |
| | Construction work Architectural, construction, engineering and inspection services BER Part L Compliance Reports Technical Assessments | |
| JFJohn Flanagan Developments Ltd Tullamore, IrelandReal Estate | Construction work Real estate services Real Estate Property Development Construction | |
| PPPlantation Plants Bray, IrelandFacility Management | Agricultural, farming, fishing, forestry and related products Agricultural, forestry, horticultural, aquacultural and apicultural services | |
| SSuperNode Ltd Dublin, IrelandEnergy, Utilities & Waste Treatment | Construction work Installation services (except software) Superconducting Cable Systems Superconductors Transmission Technology | |
| FIFuturEnergy Ireland Dublin 2, IrelandEnergy, Utilities & Waste Treatment | Construction work Installation services (except software) Renewable Energy Wind Energy Onshore Wind | |