Wellington Management Group LLP Increases Stake in Acadia Healthcare Company, Inc. to 9.9%

Wellington Management Group LLP, along with its subsidiaries Wellington Group Holdings LLP, Wellington Investment Advisors Holdings LLP, and Wellington Management Company LLP, filed a Schedule 13G/A on May 15, 2026, regarding their holdings in Acadia Healthcare Company, Inc. (ACHC). The filing indicates that Wellington Management Group LLP now beneficially owns 9,072,942 shares of common stock, representing a 9.9% ownership stake in the company. This marks a significant increase from a previously reported 0.0% position, as noted in the supplemental data. The filing clarifies that the shares are held of record by various investment advisers for their clients, with Vanguard Health Care Fund identified as a client holding more than 5% of the class. The reporting persons have shared voting power over 8,708,112 shares and shared dispositive power over the full 9,072,942 shares. The acquisition was made in the ordinary course of business and not for the purpose of influencing control over the issuer.