Chapter 9: Unpacking Co- and Dis-Synergies in Post-M&A Integration Processes

This study investigates a cross-border post-acquisition integration process at Sigma, an organization in the maritime industry, aiming at pursuing dual synergies: market power (scale-driven efficiency) and internal synergy (scope-driven innovation). Combining survey data, integration team insights and prior research, the authors develop a qualitative (causal loop diagram) and quantitative (simulation) model. These models enable an analysis of the interplay between expected and realized synergies, employee emotions and managerial prioritization of task and human integration. Our analysis unpacks how the simultaneous pursuit of dual synergies introduces dynamic complexity, manifesting in both dis-synergy and co-synergy. The authors find that negative emotions triggered by unmet synergy expectations function as critical warning signals. When addressed, such emotions catalyze adaptive integration strategies, rebalancing task harmonization and human collaboration, which enhance co-synergy realization. Conversely, the absence of negative emotions, despite meeting short-term goals, risks complacency, perpetuating structural misalignments and latent dis-synergies. Theoretically, our study contributes by demonstrating how contextual determinants (synergy type and emotional feedback) shape integration outcomes. For practitioners, the study accentuates the need for differentiated integration approaches, leveraging negative emotions as diagnostic tools to recalibrate task integration efforts and mitigate systemic inefficiencies.