Acciona

Based on the provided articles, Acciona is involved in the expansion of Line 11 of the Madrid Metro. Specifically, the 'Mayrit' tunnel boring machine is being used in the project. The president of the Community of Madrid, Isabel Díaz Ayuso, initiated the machine's operation at the future Comillas station. Other articles in the provided set do not directly mention Acciona, but discuss related topics such as rising energy costs in the Iberian Peninsula, a proposed peace plan for Iran, and Endesa's new investment plan following the departure of its CEO. One article also references corruption related to a bridge project in Seville, but does not mention Acciona. Acciona's involvement in the Madrid Metro expansion highlights its role in infrastructure development and public transportation projects.