The New Booklet Success Stories features inspiring examples of how National Competence Centers and Centers of Excellence across Europe are leveraging supercomputing to tackle complex challenges and drive innovation. Success stories span several focal areas of HPC use: atmospheric and environmental science, biosphere research, weather, climate and natural hazard impacts, agriculture and food, the energy sector, manufacturing and engineering, and more. From SMEs to research institutions, these stories demonstrate how collaboration and advanced computing drive success across borders. The publisher of Success Stories is HLRS on behalf of the EuroCC 2/EuroCC4SEE and the CASTIEL 2 Consortium.