This report (Deliverable D.2.1.1) describes how stakeholders were identified, engaged, and involved across five Alpine countries (Austria, France, Germany, Italy, and Slovenia) to co-design and test innovative solutions for forest ecosystem services. The document analyses participatory methods, stakeholder mapping, events, satisfaction surveys, and results achieved in each Living Lab, followed by a transnational comparison highlighting strengths, challenges, and lessons learned. Overall, the report demonstrates how structured stakeholder engagement supports the development of sustainable forest management models, new value chains, and policy-relevant solutions tailored to local contexts while remaining transferable across the Alpine region.