Acadia Healthcare Company, Inc. (ACHC) Ownership
ACHC ownership summary
as of October 18, 2026- Institutions
- 148.0% of shares outstanding
- Insiders
- 1.54% of shares outstanding
- Shares outstanding
- 93.1M
- Float
- 91.5M shares available to trade
- Short interest
- 37.56% 22.8M shares short
- Days to cover
- 15.70 short interest up 5.9% vs prior month
- Institutions 148.00%
- Insiders 1.54%
ACHC top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 16.07% | 15.0M | $448.4M | +3.3M (+28.0%) | June 30, 2026 |
| 2 | Wellington Management Company LLP | 6.15% | 5.7M | $171.7M | −3.3M (−36.9%) | June 30, 2026 |
| 3 | Vanguard Portfolio Management, LLC | 5.77% | 5.4M | $161.0M | +308,023 (+6.1%) | June 30, 2026 |
| 4 | FMR Inc | 5.39% | 5.0M | $150.4M | −1.9M (−27.0%) | June 30, 2026 |
| 5 | Carronade Capital Management LP | 5.12% | 4.8M | $142.8M | +2.4M (+103.8%) | June 30, 2026 |
| 6 | Morgan Stanley - Brokerage Accounts | 4.87% | 4.5M | $135.9M | +43,202 (+1.0%) | June 30, 2026 |
| 7 | Deerfield Management Co | 4.86% | 4.5M | $135.5M | — | June 30, 2026 |
| 8 | Farallon Capital Management, L.L.C. | 4.53% | 4.2M | $126.5M | +2.5M (+143.0%) | June 30, 2026 |
| 9 | Abrams Bison Investments, LLC | 4.47% | 4.2M | $124.9M | −215,000 (−4.9%) | June 30, 2026 |
| 10 | UBS Group AG | 4.34% | 4.0M | $121.3M | +1.2M (+42.7%) | June 30, 2026 |
| 11 | Dimensional Fund Advisors, Inc. | 4.31% | 4.0M | $120.3M | +1.4M (+55.5%) | June 30, 2026 |
| 12 | Vanguard Capital Management, LLC | 4.31% | 4.0M | $120.2M | −144,219 (−3.5%) | June 30, 2026 |
| 13 | State Street Corp | 4.18% | 3.9M | $116.7M | +674,373 (+21.0%) | June 30, 2026 |
| 14 | Jefferies Financial Group Inc | 3.87% | 3.6M | $108.1M | −6,816 (−0.2%) | June 30, 2026 |
| 15 | American Century Companies Inc | 3.12% | 2.9M | $87.2M | +2.4M (+460.9%) | June 30, 2026 |
| 16 | The Goldman Sachs Group Inc | 3.08% | 2.9M | $86.1M | +631,700 (+28.2%) | June 30, 2026 |
| 17 | Palo Alto Investors, LLC | 3.08% | 2.9M | $85.9M | +2.9M (0.0%) | June 30, 2026 |
| 18 | Citadel Advisors Llc | 2.86% | 2.7M | $79.9M | −50,822 (−1.9%) | June 30, 2026 |
| 19 | Geode Capital Management, LLC | 2.65% | 2.5M | $73.9M | +803,966 (+48.4%) | June 30, 2026 |
| 20 | Mak Capital One LLC | 2.61% | 2.4M | $72.9M | — | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 12 holders added 18.5M shares and 6 cut 5.6M.
ACHC top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | iShares Core S&P Small-Cap ETF | 5.95% | 5.5M | $166.2M | +1,299 (+0.0%) | September 30, 2026 |
| 2 | Vanguard Health Care Inv | 3.23% | 3.0M | $90.2M | −3.4M (−52.9%) | June 30, 2026 |
| 3 | Vanguard MStar Total Stk Mkt Idx Invest | 2.99% | 2.8M | $83.6M | −3,659 (−0.1%) | August 31, 2026 |
| 4 | iShares Russell 2000 ETF | 2.62% | 2.4M | $73.0M | −28,096 (−1.1%) | September 30, 2026 |
| 5 | Avantis US Small Cap Value ETF | 2.57% | 2.4M | $71.8M | — | September 30, 2026 |
| 6 | Vanguard Small Cap Index | 2.25% | 2.1M | $62.9M | +88,077 (+4.4%) | September 30, 2026 |
| 7 | Fidelity Value | 2.22% | 2.1M | $61.9M | — | August 31, 2026 |
| 8 | Vanguard MStar Small Cap Value Index | 1.46% | 1.4M | $40.9M | +87,186 (+6.8%) | September 30, 2026 |
| 9 | DFA US Small Cap Value I | 1.25% | 1.2M | $34.8M | +167,427 (+16.9%) | August 31, 2026 |
| 10 | Fidelity Small Cap Index | 1.09% | 1.0M | $30.5M | +8,721 (+0.9%) | July 31, 2026 |
| 11 | Schwab Fundamental U.S. Small CompanyETF | 1.00% | 934K | $28.0M | +1,323 (+0.1%) | September 30, 2026 |
| 12 | iShares Russell 2000 Value ETF | 0.95% | 883K | $26.5M | +1,338 (+0.2%) | September 30, 2026 |
| 13 | State Street SPDR Port S&P 600 Sm CpETF | 0.91% | 846K | $25.4M | — | September 30, 2026 |
| 14 | iShares S&P Small-Cap 600 Value ETF | 0.85% | 787K | $23.6M | — | September 30, 2026 |
| 15 | Natixis Vaughan Nelson Small Cap A | 0.76% | 703K | $21.1M | +65,135 (+10.2%) | August 31, 2026 |
| 16 | Vanguard Tax-Managed Small Cap Adm | 0.73% | 682K | $20.5M | −33,025 (−4.6%) | September 30, 2026 |
| 17 | DFA US Targeted Value I | 0.71% | 663K | $19.9M | +110,244 (+20.0%) | August 31, 2026 |
| 18 | Fidelity Mid Cap Value | 0.70% | 650K | $19.5M | — | August 31, 2026 |
| 19 | Invesco Main Street Small Cap R6 | 0.68% | 630K | $18.9M | — | August 31, 2026 |
| 20 | Columbia Small Cap Value Discv A | 0.62% | 576K | $17.3M | +138,106 (+31.6%) | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
ACHC insider transactions
latest 6| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2024-03-05 | Wade D Miquelon | Sell | $85.39 | 2,203 | $188,114 |
| 2023-12-12 | Debra K Osteen | Sell | $76.23 | 8,000 | $609,840 |
| 2023-11-14 | John S Hollinsworth | Sell | $74.01 | 92,500 | $6.8M |
| 2023-11-10 | John S Hollinsworth | Sell | $73.00 | 20,000 | $1.5M |
| 2023-11-08 | Debra K Osteen | Sell | $74.21 | 15,000 | $1.1M |
| 2023-11-08 | John S Hollinsworth | Sell | $74.50 | 12,500 | $931,250 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
ACHC shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns ACHC
Institutional investors own 148.0% of Acadia Healthcare's shares and insiders 1.54%. The largest holder is BlackRock Inc with 16.07% of the shares (15.0M), as of June 30, 2026. Among the top 20 institutions, 12 added shares and 6 reduced their stake in the latest filings. Short interest is 37.56% of the float, or 15.70 days of average trading volume. The share count rose 51.9% since 2014.
Related: ACHC analyst forecast, ACHC key metrics. See the ACHC stock overview for the latest quote and news.
ACHC ownership FAQ
Who owns the most Acadia Healthcare stock?
The largest shareholders of Acadia Healthcare are BlackRock Inc (16.07%), Wellington Management Company LLP (6.15%), Vanguard Portfolio Management, LLC (5.77%), FMR Inc (5.39%), Carronade Capital Management LP (5.12%).
What percentage of Acadia Healthcare is owned by institutions?
Institutions hold 148.0% of Acadia Healthcare's shares outstanding; insiders hold 1.54%.
Which funds own Acadia Healthcare?
The largest fund holders of Acadia Healthcare are iShares Core S&P Small-Cap ETF (5.95%), Vanguard Health Care Inv (3.23%), Vanguard MStar Total Stk Mkt Idx Invest (2.99%), iShares Russell 2000 ETF (2.62%), Avantis US Small Cap Value ETF (2.57%).
What is Acadia Healthcare's short interest?
22.8M shares of Acadia Healthcare were sold short, 37.56% of the float; at the average daily volume it would take 15.70 days to cover.
Are insiders buying or selling Acadia Healthcare?
Of the latest 6 reported insider transactions in Acadia Healthcare (since November 8, 2023), 0 were purchases and 6 were sales.
How many shares of Acadia Healthcare are outstanding?
Acadia Healthcare has 93.1M shares outstanding, of which 91.5M are in the public float.