We examine the impact of internal coalition, measured by the appointment of the top executives and directors by the CEO after he assumes office, on stock crash risk during 2000–2014. The appointment-based internal coalition has a positive and significant impact on stock crash risk. Internal coalition is a more important factor than measures of CEO power, such as CEO tenure and duality, in predicting stock price crash. We address the endogeneity concerns by utilizing an exogenous shock to the internal coalition to conduct difference-in-differences (DID) regressions. The main results survive numerous robustness tests.