Аннотация:In modern society, entrepreneurial practices have evolved through the emergence of sustainable development (SD), corporate social responsibility (CSR) initiatives, the consolidation of traditional sectors in the social economy (SE) and the rise of social innovation through technological innovation. In addition, advances in information and communication technology (ICT) enable the general public to become more easily involved in organisational transformations. The term ‘crowdsourcing’ applies to projects that are jointly created by project initiators and citizens. This article addresses the question of whether these citizens, that is, ‘crowds’, should become more involved in sustainable financing organisations that seek legitimacy and socioeconomic efficiency. Ultimately, the question concerns the ability of those responsible for sustainable financing to incorporate these new forms of public involvement and provide appropriate financing for societal challenges. Is it possible for these actors to do this? If so, under what conditions, and how will they have to evolve? A longitudinal case study is carried out to develop a regional ethical, solidarity and crowdfunding investment fund in which the role of the public is clearly defined. We identify the range of possibilities in organisational transformations that are taking place amongst sustainable financing actors.