Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock, par value $0.01 per share^F1,F2,F3,F7	Sep 12, 2016	S	48,321	$51.77	D	4,707,214	I	See footnotes
Common Stock, par value $0.01 per share^{F4,F5,F3,F6,F7}	Sep 13, 2016	S	5,933	$51.23	D	4,701,281	I	See footnotes

Table II — derivative securities

No Table II lines on this filing.

Explanation of responses

F1Represents shares sold in multiple transactions under Rule 144 as follows: (i) 9,095 shares by Waud Capital Partners II, L.P. ("WCP II"), (ii) 27,464 shares by Waud Capital Partners QP II, L.P. ("Waud QP II"), (iii) 5,811 shares by WCP FIF II (Acadia), L.P. ("WCP FIF II") and (iv) 5,951 shares by Waud Capital Affiliates II, L.L.C. ("Waud Affiliates II").
F2The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions under Rule 144 at prices ranging from $51.58 to $52.01, inclusive. The reporting persons undertake to provide to Acadia Healthcare Company, Inc., any security holder of Acadia Healthcare Company, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in Footnote (1) to this Form 4.
F3Reeve B. Waud is a member of the board of directors of Acadia Healthcare Company, Inc. Mr. Waud is also the manager of Waud Capital Partners II, L.L.C. ("Waud II LLC") and a member of the Limited Partner Committee of Waud Capital Partners Management II, L.P. ("WCPM II"). Waud II LLC is the general partner of WCPM II. WCPM II is the general partner of WCP II, Waud QP II and WCP FIF II and the manager of Waud Affiliates II. As a result, each of Mr. Waud, Waud II LLC and WCPM II may be deemed to share beneficial ownership of the reported shares.
F4Represents shares sold in multiple transactions under Rule 144 as follows: (i) 1,117 shares by WCP II, (ii) 3,372 shares by Waud QP II, (iii) 713 shares by WCP FIF II and (iv) 731 shares by Waud Affiliates II.
F5The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions under Rule 144 at prices ranging from $51.15 to $51.85, inclusive. The reporting persons undertake to provide to Acadia Healthcare Company, Inc., any security holder of Acadia Healthcare Company, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in Footnote (4) to this Form 4.
F6The reported shares are owned of record as follows: (i) 1,297,373 shares by WCP II, (ii) 2,557,606 shares by Waud QP II, (iii) 418,098 shares by WCP FIF II and (iv) 428,204 shares by Waud Affiliates II.
F7Each of the reporting persons expressly disclaims beneficial ownership of the reported shares except to the extent of its pecuniary interest therein.