Partner ecosystems are essential for scaling B2B marketing and sales, but they often suffer from a lack of transparency that erodes partner trust. Siemens, a global industrial software provider, recognized that as its partner ecosystem scaled, partners lacked clear visibility into how lead routing and opportunity attribution worked in practice. To restore trust and improve collaboration, Siemens designed a partner-facing dashboard that visualizes campaign performance, lead flow, and sales outcomes. In this case study, we describe how Siemens rebuilt partner trust and increased engagement by creating a data-driven dashboard that operationalized transparency.