The sharing of data across organizational boundaries is becoming increasingly important. In the context of mobility, data sharing is the foundation for enabling multimodal travel and real-time schedules. However, in practice, the design and implementation of cross-organizational data-driven use cases often proves difficult and subsequently fails. In addition to technological and organizational challenges, building trust between the participating organizations proves to be a success factor. This paper presents a case study in the mobility sector in which multiple organizations collaborate to enable data-driven use cases. The research process employed was action design research, which enabled the development of a framework that outlines the goals and activities of the participating organizations and contributes toward building interorganizational trust. Finally, we extract Design Principles from our results and discuss our findings.