Acadia Healthcare stock gains as activist Engine Capital reports 3% stake

Core Viewpoint - Acadia Healthcare (NASDAQ: ACHC) experienced a 4% increase in premarket trading following the announcement that activist investor Engine Capital acquired a 3% stake and is advocating for changes in the board and other strategic moves [2] Company Summary - Engine Capital has reported a 3% stake in Acadia Healthcare, indicating a significant interest in influencing the company's governance and strategic direction [2] - The activist investor is pushing for board changes and other initiatives to enhance the company's performance and shareholder value [2]