This thesis explores how journalists and managers at Nordic public service organizations perceive successful news reporting through third-party social media. The aim is to contribute to the understanding of digital platform dependencies among public service organizations. Previous research has conceptualized digital journalistic epistemologies and examined specific methods of news production on platforms, highlighting concerns about journalistic autonomy in spaces influenced by third-party interests. This thesis employs a qualitative, exploratory approach to investigate the social media strategies and understandings of success at Nordic public service media organizations YLE, SVT, NRK, RÚV, and DR. Through semi-structured interviews, the study reveals an ongoing negotiation between editorial objectives and platform logics in social media news reporting. Journalists view success as engaging with the target audience, while managers emphasize credibility and relevance in a shifting media landscape. Further, the perceptions of journalists and managers are compared, highlighting a possible negotiation between the managerial and operational levels. The study revisits public service media news-making in a Nordic context, contributing to the fields of digital journalism studies and digital platform studies.