FRANKLIN, Tenn.–(BUSINESS WIRE)–Acadia Healthcare Company, Inc. (“Acadia” or the “Company”) (NASDAQ: ACHC) issues the below summary notice of proposed settlement as provided for in the September 1, 2026 order providing preliminary approval issued by the United States District Court for the Middle District of Tennessee. UNITED STATES DISTRICT COURT MIDDLE DISTRICT OF TENNESSEE NASHVILLE DIVISION IN RE ACADIA HEALTHCARE COMPANY, INC. STOCKHOLDER DERIVATIVE LITIGATION Lead Case No. 3:19-cv-00167