Acadia Healthcare Company, Inc. (NASDAQ: ACHC) (the “Company”) today announced the closing of its previously announced registered follow-on offering of 8,250,000 shares of its common stock at a public offering price of $15.50 per share. Prior to closing, the underwriters exercised in full their option to purchase an additional 1,237,500 shares of common stock from the Company. As a result, the total offering size was 9,487,500 shares of common stock. Acadia received approximately $139 million in net proceeds from the offering, after deducting underwriting discounts and commissions and estimated expenses of the offering. Acadia expects to use the net proceeds from this offering principally to fund its acquisition strategy. The Company plans to use the net proceeds for general corporate purposes to the extent not used for acquisitions. Citigroup, BofA Merrill Lynch and Jefferies & Company, Inc. acted as joint bookrunners for the offering, and Raymond James & Associates, Inc., RBC Capital Markets, LLC and Avondale Partners, LLC acted as co-managers. The offering was made only by means of a written prospectus, copies of which may be obtained by contacting: Citigroup, Attention: Prospectus Department, Brooklyn Army Terminal, 140 East 58th Street, 8th Floor, Brooklyn, NY 11220 or telephone: (800) 831-9146 or email: BATProspectusdept@citi.com; BofA Merrill Lynch, Attn: Prospectus Department, 4 World Financial Center, New York, NY 10080 or email: firstname.lastname@example.org; or from Jefferies & Company, Inc., 520 Madison Ave., 12th Floor, New York, NY 10022, Attn: Equity Syndicate Prospectus Department or telephone (877) 547-6340 or email Prospectus_Department@Jefferies.com. A registration statement relating to these shares of common stock of the Company was declared effective by the Securities and Exchange Commission (the “SEC”) on May 15, 2012. The final prospectus may also be obtained on the SEC’s website at http://www.sec.gov. This press release shall not constitute an offer to sell or a solicitation of an offer to buy, nor shall there be any sale of these securities in any state or jurisdiction in which such an offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.