Acadia Healthcare Company, Inc.
US ˙ NasdaqGS ˙ US00404A1097

SecurityACHC / Acadia Healthcare Company, Inc.
InstitutionDeerfield Management Company, L.p. (series C)
Latest Disclosed Ownership4,520,000 shares
Latest Disclosed Value $ 105,722,800
Deerfield Management Company, L.p. (series C) ownership in ACHC / Acadia Healthcare Company, Inc.

On May 15, 2026 - Deerfield Management Company, L.p. (series C) filed a 13F-HR form disclosing ownership of 4,520,000 shares of Acadia Healthcare Company, Inc. (US:ACHC) valued at $105,722,800 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 4,520,000 shares of Acadia Healthcare Company, Inc.. This represents a change in shares of 0.00% during the quarter. The current value of the position is $116,299,600 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F ACADIA HEALTHCARE COMPANY IN COM 00404A109 4,520,000 0 0.00 105,723 64.84 1.2473
2026-02-17 2025-12-31 13F ACADIA HEALTHCARE COMPANY IN COM 00404A109 4,520,000 3,331,000 280.15 64,139 117.87 0.8191
2025-11-14 2025-09-30 13F ACADIA HEALTHCARE COMPANY IN COM 00404A109 1,189,000 1,189,000 29,440 0.4494
2025-02-14 2024-12-31 13F ACADIA HEALTHCARE COMPANY IN COM 00404A109 0 -17,673 -100.00 0 -100.00
2024-11-14 2024-09-30 13F ACADIA HEALTHCARE COMPANY IN COM 00404A109 17,673 17,673 1,121 0.0167
2019-05-15 2019-03-31 13F ACADIA HEALTHCARE COMPANY IN COM 00404A109 0 -621,000 -100.00 0 -100.00
2019-02-14 2018-12-31 13F ACADIA HEALTHCARE COMPANY IN COM 00404A109 621,000 -803,571 -56.41 15,966 -68.16 0.6391
2018-11-14 2018-09-30 13F ACADIA HEALTHCARE COMPANY IN COM 00404A109 1,424,571 683,555 92.25 50,145 65.41 1.7962
2018-08-14 2018-06-30 13F ACADIA HEALTHCARE COMPANY IN COM 00404A109 741,016 0 0.00 30,315 4.42 1.0646
2018-05-15 2018-03-31 13F ACADIA HEALTHCARE COMPANY IN COM 00404A109 741,016 0 0.00 29,033 20.08 1.0059
2018-02-14 2017-12-31 13F ACADIA HEALTHCARE COMPANY IN COM 00404A109 741,016 741,016 24,179 0.9516
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.