| HGHEAT gas technologies GmbH Biedermannsdorf, AustriaEnergy, Utilities & Waste Treatment | Construction structures and materials; auxiliary products to construction (except electric apparatus) Abluftreinigung Wärmerückgewinnung Erdgastechnik | |
| KPKESS Power Solutions GmbH Wien, AustriaEnergy, Utilities & Waste Treatment | Installation services (except software) Unterbrechungsfreie Stromversorgung Überspannungsschutz USV-Service | |
| FFreudenthaler Inzing, AustriaEnergy, Utilities & Waste Treatment | Construction structures and materials; auxiliary products to construction (except electric apparatus) Abfallentsorgung Industrieabfall Gewerbeabfälle | |
| EEENVIRON Engineering Engelmannsbrunn, AustriaEnergy, Utilities & Waste Treatment | Installation services (except software) Verbrennungstechnik Industriebrenner Prozessbrenner | |
| MAMesser Austria Gumpoldskirchen, AustriaEnergy, Utilities & Waste Treatment | Construction structures and materials; auxiliary products to construction (except electric apparatus) Industriegase Technische Gase Medizinische Gase | |
| PSPower Solar Wärmetauscher AUSTRIA Ansfelden, AustriaEnergy, Utilities & Waste Treatment | Installation services (except software) Wärmetauscher Plattenwärmetauscher Technische Auslegung | |
| EMENERGY MODE GmbH Thiersee, AustriaEnergy, Utilities & Waste Treatment | Construction structures and materials; auxiliary products to construction (except electric apparatus) Installation services (except software) Mobile Energieversorgung Vermietung Von Energiezentralen Wärme | |
| SESteinbacher Energie GmbH Hollenstein an der Ybbs, AustriaEnergy, Utilities & Waste Treatment | Construction structures and materials; auxiliary products to construction (except electric apparatus) Installation services (except software) Kabel- Und Zählerverteilerschränke Anlagenbau Großhandel | |
| MRMayer Recycling GmbH St. Michael, AustriaEnergy, Utilities & Waste Treatment | Construction structures and materials; auxiliary products to construction (except electric apparatus) Abfallaufbereitung Recycling Mulden Und Containerservice | |
| HHydrofy Wien, AustriaEnergy, Utilities & Waste Treatment | Installation services (except software) Wasserstofffahrzeuge Energiewende Wasserstoff | |