In this contribution we explore a design technique for business ecosystem applying conceptual modelling techniques as a means to conceptualize such environments and provide capabilities to explore and analyze its outcomes in a comprehensive manner. The motivation for this work is attributed to the need of methods in the field that support design, collaborations during evaluation/evolution phases of business ecosystems. The requirements are derived from a review of literature and case studies, used as input for a conceptual analysis performed. As an outcome we propose a modelling method and prototype that provides a formal representation of the concepts identified, interaction and sharing capabilities of models and enables domain-specific extension capabilities realized through metamodeling.