While research on mergers and acquisitions (M&A) capabilities is accelerating, our understanding of their antecedents and performance implications still remains rather fragmented. Previous research has outlined the importance of learning for building M&A capabilities, but no work has attempted to summarize previous empirical findings regarding different learning mechanisms and their impacts on M&A performance. Mainly drawing upon organizational learning theory and the dynamic capabilities perspective, this study consolidates research on the relationship between different learning mechanisms, post-acquisition integration strategies, and M&A performance. Using meta-analytical techniques, our study shows that the capability-building mechanism relying on deliberate investments in learning tends to be more effective than the capability mechanism based on mere experience accumulation. In addition, our findings indicate that a higher degree of integration is associated with enhanced M&A performance among firms with more developed experiential learning, highlighting the need to explore mediating effects of integration strategy choices on the experiential learning-performance relationship.