The purpose of this thesis is to examine how entrepreneurial firms use external actors to create value in their companies in an entrepreneurial ecosystem. Of particular importance is how an intermediary organisation can foster value co-creation. This is done by looking at a case study of the Oslo Cancer Cluster incubator in Norway. The incubator is situated in the middle of an oncology cluster which offers an intriguing arrangement. The thesis will examine the arrangement of the cluster, incubator and its actors