The aim of this paper is to propose a taxonomy of industrial symbiosis (IS) business models. Rather than to adopt a firm perspective, we take a system perspective and focus on the governance of the system made up of the firms implementing IS, being the latter considered an important factor influencing firm's competitive advantage. Four extreme IS business models are identified, characterized on the basis of two governance features: (1) need for coordination and (2) centralization of control. For each model, the main characteristics are presented and the main factors influencing firm value creation and value capture discussed. In doing so, our study contributes to clarify how and why firms applying IS practice can gain competitive advantage, a major gap in the current literature. Consequently, we contribute to the practical development of IS, which appears to be still not fully exploited by firms, despite its relevance.