Also says this on the S-4 regarding outstanding shares, page 1.
(1) Based upon the maximum number of shares(293,243) of common stock that may be issued pursuant to the merger described in the notice/prospectus forming a part of this registration statement, calculated as the product of (a) 186,452, representing the aggregate number of shares of common stock, par value $0.001 per share, of American Addiction Centers, Inc. outstanding on October 30, 2014 (other than shares owned by the registrant and its wholly-owned subsidiaries) and (b) the exchange ratio of 1.571119 shares of AAC Holdings, Inc. common stock for each share of American Addiction Centers, Inc. common stock, rounded up to the nearest whole share for each beneficial holder.