The risk of deal breakage is central to merger and acquisition (M&A) dealmaking. Yet neither the finance nor corporate law literatures have systematically explored how and why deals fall apart. This Article rectifies this deficiency, making three principal contributions. First, it develops a comprehensive typology of eight M&A outcomes: completed-as-announced deals and seven types of deal breakage. Second, it unveils a novel dataset of 5,058 mergers and acquisitions involving U.S. public company targets signed between 1996 and 2020. Finally, it demonstrates how the Article's typology and data yield important implications for M&A practice and doctrine by casting new light on key debates over deal protection devices, the power of controlling shareholders, and “merger arbitrage” investors.
June
2026