E-government evolves towards large-scale software platforms that integrate access to and information exchange among public services. Governance of large-scale e-government platforms is challenging because of the large number of stakeholders with diverging needs, agendas, and changing service portfolios. This paper presents a revelatory case, the e-government platform Suomi.fi, its stakeholders and stakeholder interactions related to development and governance of the platform. Our stakeholder analysis of Suomi.fi identified 15 stakeholder interaction types and related issues regarded as important for governance of large-scale e-government platforms. The results contribute by addressing the importance of stakeholder identification and continuing governance beyond individual development and implementation projects. Such a large-scale platform involved additional stakeholder types of external influencers (including media, other countries, the European Union, third party software integrators) and other external platforms, compared to the project-centric stakeholder models. Hence, we argue for extended stakeholder governance models and practices for large-scale e-government platforms.