Existing work studies the effects of corporate events — such as mergers and acquisitions (M&A) — on workers by examining changes in labor activity before and after the event. Using new data on individual job search behavior, we examine the timing of labor market activity around M&A events. We provide evidence for a significant amount of endogenous worker selection: job search activity for employees of M&A targets begins to increase ten months prior to a takeover announcement. In contrast, stock prices of target companies begin to rise only one month before an announcement. M&A announcements, therefore, appear to mark an intermediate point in the labor reallocation process, rather than the beginning. We show that shifting the window of analy...