The international governance landscape on climate change mitigation is increasingly complex across multiple governance levels. Climate change mitigation initiatives by non-state stakeholders can play an important role in governing global climate change. The article addresses the relationship between intergovernmental and transnational governance processes in global climate governance. Particularly, the article aims to complement existing research on the role of "orchestration" by and through the UNFCCC process by focusing on how successful transnational initiatives can resonate within the intergovernmental negotiation process in order to inspire more ambitious climate action also on the part of national governments. This issue is addressed by systematically analysing interdependencies between transnational and international governance. Building on a structurational regime model, the article develops a theory of change of how and through which structuration channels non-state initiatives can contribute to changing the politics of international climate policy, traces existing UNFCCC processes and the Paris Agreement with a view to identifying inroads for a more direct feedback from non-state initiatives and derives recommendations on how and under which agenda items positive experiences can resonate within the UNFCCC negotiation process.