This brainstorming workshop will focus on discussing potentials for interregional cooperation on circular economy, in the context of the objectives for the Programming period 2021-2027. As Europe needs to quickly and effectively shift toward a more sustainable path, Regions and managing authorities can play a crucial role in facilitating the transition toward a circular economy. The brainstorming table will allow participants to discuss: -which regional sectors or value chains show the biggest potential for the transition -which RIS3 sector has the biggest potential for the transition -which regional sectors are the most resource/pollution intensive and need to transition toward a more sustainable path The brainstorming session will help participants in finding possible areas for collaboration, aiming at exploring emerging sinergies and ideas, participants will potentially find: -partners interested in developing together a path for the circular transition in a sector of shared interest; -more advanced regions willing to support the sectoral transition by cooperating through knowledge transfer and capacity building; -less advanced regions willing to learn how to facilitate the transition at sectoral level.