This report presents the key results of Task 5.1. As a basis for strengthening the community of IS-related policy making, it specifies relevant stakeholders, including their roles, expectations and needs. It particularly identifies national and EU-level government and public bodies involved in policy making for the process industries, organisations from the third sector that focus on policy making, IS practitioners, and relevant associations. Additionally, it identifies organisations from the industry who are interested in taking part in the process of adjusting or creating policies for supporting IS. In these contexts, it also identifies relevant IS practitioners at Hubs for Circularity (H4C) on different policy-making levels and in RISERS’ key sectors.