%X Social media have penetrated deeply into everyday life, affecting people’s informal interactions, as well as institutional structures and professional routines. Communication and organizational collaboration are influenced by the norms, strategies, and mechanisms of social media referred to as social media logic. Boundary spanners, who enable collaboration between different parties and discourses through translation, filtering, and sharing of information and knowledge, are susceptible for these changes in communication patterns and habits. This study aims to shed light on the effect of the digitized shift in boundary spanning in an interorganizational context of the European Green Capital Award 2021 -initiative through a mixed methodology approach. The results suggest that social media logic indeed has an effect on boundary spanning and that different roles of boundary spanning become visible through social media and datafication. Boundary spanning roles can be assigned to different organizations which, in-turn, can be useful in creating more effective interorganizational collaboration procedures. Additionally, the mediating effect of social media platforms in interorganizational collaboration seems evident. In their communication, organizations utilize algorithms that steer the flow of information and interaction in order to effectively perform boundary spanning actions and collaborate. More extensive dataset and analysis are required to further research the effects of social media logic on boundary spanning, collaboration, and more generally, communication. %L theses_frw3550 %A Tuukka Korpela %D 2021 %T Social Media Logic in Interorganizational Boundary Spanning: the Case of European Green Capital Award 2021