Nationalism—a powerful force promoting the interests of individual nations—has resurged in recent years, influencing geopolitical landscapes and corporate behavior. From protectionist policies and immigration restrictions to organizational strategies and global market dynamics, nationalism has profound business implications. Under this backdrop, firms increasingly embrace nationalist ideologies, a phenomenon we call corporate nationalism. While organizational and strategy research fields have examined nationalism from multiple perspectives, current research remains fragmented and lacks an integrated understanding to illuminate this phenomenon fully. Drawing insights from six subject experts, this PDW seeks to bridge these gaps by exploring key questions about the conceptual foundations, varied manifestations, underlying processes, and consequences of corporate nationalism. We will also explore data sources and methodologies to strengthen this emerging paradigm. Through interactive discussions and collaborative sessions, participants will gain fresh perspectives, research tools, and practical guidance to navigate the complexities of corporate nationalism—ultimately advancing their own work in this evolving and vibrant area of inquiry.