Taking advantage of the implementation of the 2003 European Commission (EC) directive on financial reporting, we explore the impact of mandatory financial disclosure on mergers and acquisitions (M&A). We find robust evidence that the number (and volume) of private firms becoming an M&A target increases with mandatory disclosure. Analyses of cross-industry differences, deal-level data, and post-deal performance indicate that financial disclosure increases M&A activity by reducing information frictions in the market for corporate control.