Manufacturers are facing increased competitive pressure to strengthen their business ecosystems in order to adapt to ongoing twin transitions toward digitalization and sustainability and their associated trends. Yet, managing such ecosystems in complex inter- and intra-organizational settings requires a profound, yet little understood, shift in the role and capabilities of internal organizational functions. This study aims to investigate the composition of ecosystem management capabilities. We employ an in-depth single case study of a leading global solution provider in the automotive and transport industry, based on 51 interviews across the ecosystem management function, various organizational functions, and ecosystem actors. Our analysis, rooted in the dynamic capabilities perspective, highlights three sets of crucial ecosystem management capabilities: ecosystem foresight, ecosystem integration, and ecosystem governance. We further detail the underlying routines and micro-foundational activities enabling these capabilities. By illuminating the key capabilities, routines, and activities of ecosystem management in a dynamic context, this study makes significant contributions to management and strategy research on ecosystems and ecosystem management in rapidly evolving business landscapes.