In this article, we explore how an important state intervention in cooperation with many civil society actors led to impact investing field emergence, intending to create favourable conditions for social entrepreneurship and social innovation. Twenty in-depth interviews were conducted in Portugal, with the main players in the field, including private sector, government, NGOs, and EU authorities. The ecosystem formed by these actors is analysed under the institutional theory lens and through an inductive method, leading to a process-based model. The results of our case study show a state struggling to involve private sector in providing resources to the field. On demand side, new entrepreneurs are finding difficulties in meeting legal requirements and answering suppliers’ selection criteria. Intermediaries contribute to reducing complexities, but are fighting to encounter their place in the field. Our evidences further suggest that social entrepreneurship and social innovation could be implemented as socially embedded actions, in response to local demands.