Monitor for any future amendments to this 13G that show an increase or decrease in Dimensional's stake, which could signal a change in conviction. As a passive filing from a large index-oriented manager, no near-term catalyst is expected.
Price Chart
Executive Summary
Dimensional Fund Advisors LP disclosed a 5.0% passive stake in Acadia Healthcare Company, Inc. as of September 30, 2026, holding 4,698,457 shares. This is a new SC 13G filing by Dimensional, indicating a passive investment strategy with no intent to influence management.
Key Financial Metrics
Key Facts
- Dimensional Fund Advisors LP reported beneficial ownership of 4,698,457 shares of Acadia Healthcare common stock.
- The stake represents 5.0% of shares outstanding as of September 30, 2026.
- Dimensional is an investment adviser registered under the Investment Advisers Act of 1940 and files as an IA (Item 3 classification).
- The filing is a new Schedule 13G, not an amendment, indicating this is Dimensional's initial 5%+ disclosure for Acadia Healthcare.
- Dimensional disclaims beneficial ownership of the securities, which are held by various funds it advises.
Financial Impact
5.0% passive stake valued at approximately $4.7 million based on share count (no dollar value stated in filing).
Risk Factors
- Dimensional could reduce its position in future quarters, which would be a negative signal.
- No indication of activist intent, but a future conversion to 13D cannot be ruled out.
Investment Themes
Documents Analyzed
This report is based on 3 SEC documents filed with EDGAR.
| Document | Accession Number |
|---|---|
| SC 13G Filing (Primary) | 0000354204-26-001066 |
| Document: 0000354204-26-001066-index.html | 0000354204-26-001066 |
| Document: 0000354204-26-001066.txt | 0000354204-26-001066 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 8, 2026 19d ago | SC 13G | $28.48 $29.25 | ▲ +2.70% | ▲ +2.10% | $29.90 (+4.99%) |
Sep 25, 2026 4w ago | 8-K | $27.91 $28.04 | ▲ +0.47% | ▲ +0.65% | $29.90 (+7.13%) |
Aug 5, 2026 11w ago | Institutional Cluster | $30.72 $31.53 | ▲ +2.64% | ▲ +2.03% | $29.90 (−2.67%) |
Jul 28, 2026 13w ago | 8-K | $27.35 $28.14 | ▲ +2.89% | ▲ +1.21% | $29.90 (+9.32%) |
May 27, 2026 21w ago | Court Ruling | $24.09 $23.76 | ▼ −1.37% | ▼ −1.92% | $29.90 (+24.12%) |
May 18, 2026 23w ago | 8-K | $24.92 $24.07 | ▲ +3.41% | ▲ +4.45% | $29.90 (−19.98%) |
Apr 29, 2026 25w ago | 8-K | $25.90 $27.85 | ▲ +7.53% | ▲ +7.31% | $29.90 (+15.44%) |
Apr 7, 2026 29w ago | Court Ruling | $25.39 $26.31 | ▼ −3.62% | ▼ −1.08% | $29.90 (−17.76%) |
Mar 25, 2026 30w ago | DEFA14A | $23.85 $22.91 | ▼ −3.94% | ▼ −2.26% | $29.90 (+25.37%) |
Feb 25, 2026 34w ago | 8-K | $20.84 $22.29 | ▼ −6.96% | ▼ −7.50% | $29.90 (−43.47%) |
US Market Status
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