This document is the Open Source Report for the year 2025 published by SAP. It outlines SAP's engagement with open source technologies, emphasizing the collaborative innovation that openness fosters. The report discusses how openness has become fundamental to SAP's artificial intelligence (AI) strategy, detailing the company's contributions, such as the release of sap-rpt-1-oss, an open-source foundational model for relational business data. It explains the growing significance of open source in enterprise innovation, noting milestones that illustrate the maturation of open source AI over the past year. It highlights the introduction of the Fork Metadata Standard aimed at improving software supply chain transparency and the establishment of the NeoNephos Foundation to enhance Europe's open cloud ecosystem. Additionally, the report reflects on the importance of financial sustainability in open source and the collaborative efforts necessary to maintain critical digital infrastructure, acknowledging contributors to the ecosystem. Overall, the report serves as a comprehensive account of SAP's commitment to driving open source initiatives and the cooperative efforts aimed at creating a secure and open digital future.