Who owns Acadia Healthcare Company (ACHC)
Which tracked institutional funds hold ACHC, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See ACHC company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
113 tracked funds added or opened ACHC while 65 trimmed or exited it between 2026-Q1 and 2026-Q2 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
ACHC’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes ACHC more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in ACHC divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 290 tracked filers holding ACHC, 156 increased or opened the position and 160 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in ACHC between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 27
- Palo Alto Investors LP$72M
- MANGROVE PARTNERS IM, LLC$41M
- MACQUARIE GROUP LTD$15M
- BANK OF NOVA SCOTIA$15M
- HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND$12M
- Teca Partners, LP$8M
Full exits 40
- FIRST TRUST ADVISORS LP$40M
- MAVERICK CAPITAL LTD$31M
- Invenomic Capital Management LP$28M
- Rubric Capital Management LP$20M
- CIBC Bancorp USA Inc.$16M
- Buckley Capital Advisors, LLC$16M
Largest adds
- BlackRock, Inc.$261M
- CARRONADE CAPITAL MANAGEMENT, LP$86M
- FARALLON CAPITAL MANAGEMENT, L.L.C.$84M
- AMERICAN CENTURY COMPANIES INC$74M
- DIMENSIONAL FUND ADVISORS LP$58M
- UBS Group AG$53M
Largest trims
- Khrom Capital Management LLC$102M
- WELLINGTON MANAGEMENT GROUP LLP$42M
- CITIGROUP INC$39M
- SUSQUEHANNA INTERNATIONAL GROUP, LLP$17M
- Man Group plc$11M
- FMR LLC$11M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 14,957,168 | $442M | 11.2% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 5,726,246 | $169M | 4.3% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 5,369,461 | $159M | 4.0% | 2026-Q2 |
| FMR LLC trimmed | 5,015,727 | $148M | 3.8% | 2026-Q2 |
| CARRONADE CAPITAL MANAGEMENT, LP added | 4,762,635 | $141M | 3.6% | 2026-Q2 |
| MORGAN STANLEY added | 4,534,269 | $134M | 3.4% | 2026-Q2 |
| DEERFIELD MANAGEMENT COMPANY, L.P. | 4,520,000 | $133M | 3.4% | 2026-Q2 |
| DME Capital Management, LP trimmed | 4,400,641 | $130M | 3.3% | 2026-Q2 |
| FARALLON CAPITAL MANAGEMENT, L.L.C. added | 4,220,800 | $125M | 3.2% | 2026-Q2 |
| ABRAMS BISON INVESTMENTS, LLC trimmed | 4,165,000 | $123M | 3.1% | 2026-Q2 |
| UBS Group AG added | 4,044,500 | $119M | 3.0% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 4,013,718 | $119M | 3.0% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC trimmed | 4,010,582 | $118M | 3.0% | 2026-Q2 |
| STATE STREET CORP added | 3,893,124 | $115M | 2.9% | 2026-Q2 |
| Jefferies Financial Group Inc. trimmed | 3,605,067 | $106M | 2.7% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC added | 2,908,887 | $86M | 2.2% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 2,872,128 | $85M | 2.2% | 2026-Q2 |
| Palo Alto Investors LP new | 2,864,096 | $72M | 1.8% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 2,665,603 | $79M | 2.0% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 2,465,247 | $73M | 1.9% | 2026-Q2 |
| MAK CAPITAL ONE LLC | 2,432,962 | $72M | 1.8% | 2026-Q2 |
| NEUBERGER BERMAN GROUP LLC added | 2,238,423 | $66M | 1.7% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 2,062,966 | $61M | 1.5% | 2026-Q2 |
| VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P. trimmed | 1,807,697 | $53M | 1.4% | 2026-Q2 |
| Invesco Ltd. added | 1,790,454 | $53M | 1.3% | 2026-Q2 |
| P2 Capital Partners, LLC | 1,774,484 | $52M | 1.3% | 2026-Q2 |
| DEUTSCHE BANK AG\ added | 1,684,607 | $50M | 1.3% | 2026-Q2 |
| FRONTIER CAPITAL MANAGEMENT CO LLC added | 1,672,857 | $49M | 1.3% | 2026-Q2 |
| MANGROVE PARTNERS IM, LLC added | 1,396,059 | $41M | 1.0% | 2026-Q2 |
| BRAIDWELL LP added | 1,141,477 | $34M | 0.9% | 2026-Q2 |
| NORTHERN TRUST CORP added | 1,130,639 | $33M | 0.8% | 2026-Q2 |
| BROWN ADVISORY INC trimmed | 1,108,390 | $33M | 0.8% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 857,730 | $25M | 0.6% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC added | 845,879 | $25M | 0.6% | 2026-Q2 |
| BARCLAYS PLC added | 821,340 | $24M | 0.6% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC added | 813,417 | $24M | 0.6% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 731,656 | $22M | 0.5% | 2026-Q2 |
| Khrom Capital Management LLC trimmed | 647,006 | $19M | 0.5% | 2026-Q2 |
| Freestone Grove Partners LP added | 643,486 | $19M | 0.5% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 604,796 | $18M | 0.5% | 2026-Q2 |
| Allianz Asset Management GmbH trimmed | 578,942 | $17M | 0.4% | 2026-Q2 |
| Bank of New York Mellon Corp added | 559,436 | $17M | 0.4% | 2026-Q2 |
| CITIGROUP INC trimmed | 553,412 | $16M | 0.4% | 2026-Q2 |
| PFM Health Sciences, LP trimmed | 524,934 | $16M | 0.4% | 2026-Q2 |
| Aberdeen Group plc added | 522,963 | $15M | 0.4% | 2026-Q2 |
| MACQUARIE GROUP LTD added | 522,500 | $15M | 0.4% | 2026-Q2 |
| TORONTO DOMINION BANK added | 499,981 | $15M | 0.4% | 2026-Q2 |
| BANK OF NOVA SCOTIA added | 495,632 | $15M | 0.4% | 2026-Q2 |
| SEGALL BRYANT & HAMILL, LLC added | 468,207 | $14M | 0.4% | 2026-Q2 |
| PALISADE CAPITAL MANAGEMENT, LP trimmed | 456,960 | $13M | 0.3% | 2026-Q2 |
| Aristotle Capital Boston, LLC trimmed | 435,076 | $13M | 0.3% | 2026-Q2 |
| HAWK RIDGE CAPITAL MANAGEMENT LP trimmed | 418,017 | $12M | 0.3% | 2026-Q2 |
| Integral Health Asset Management, LLC added | 400,000 | $12M | 0.3% | 2026-Q2 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND new | 400,000 | $12M | 0.3% | 2026-Q2 |
| ROYAL BANK OF CANADA added | 353,381 | $10M | 0.3% | 2026-Q2 |
| Gotham Asset Management, LLC trimmed | 346,197 | $10M | 0.3% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND added | 333,504 | $10M | 0.3% | 2026-Q2 |
| STRS OHIO trimmed | 331,061 | $10M | 0.2% | 2026-Q2 |
| FRANKLIN RESOURCES INC added | 320,566 | $9M | 0.2% | 2026-Q2 |
| Public Sector Pension Investment Board trimmed | 315,999 | $9M | 0.2% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. added | 298,697 | $9M | 0.2% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN trimmed | 296,104 | $9M | 0.2% | 2026-Q2 |
| CLOUGH CAPITAL PARTNERS L P added | 284,528 | $8M | 0.2% | 2026-Q2 |
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC trimmed | 278,280 | $8M | 0.2% | 2026-Q2 |
| Teca Partners, LP trimmed | 272,400 | $8M | 0.2% | 2026-Q2 |
| Nuveen, LLC added | 265,559 | $8M | 0.2% | 2026-Q2 |
| NATIXIS added | 260,548 | $8M | 0.2% | 2026-Q2 |
| MARSHALL WACE, LLP added | 260,197 | $8M | 0.2% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 255,703 | $8M | 0.2% | 2026-Q2 |
| WINTON GROUP Ltd added | 255,451 | $8M | 0.2% | 2026-Q2 |
| Man Group plc trimmed | 255,147 | $8M | 0.2% | 2026-Q2 |
| HOHIMER WEALTH MANAGEMENT, LLC added | 242,850 | $7M | 0.2% | 2026-Q2 |
| CONGRESS ASSET MANAGEMENT CO added | 237,972 | $7M | 0.2% | 2026-Q2 |
| RHUMBLINE ADVISERS added | 236,728 | $7M | 0.2% | 2026-Q2 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. trimmed | 230,140 | $7M | 0.2% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 222,444 | $7M | 0.2% | 2026-Q2 |
| PRELUDE CAPITAL MANAGEMENT, LLC trimmed | 214,380 | $6M | 0.2% | 2026-Q2 |
| Legal & General Group Plc trimmed | 207,482 | $6M | 0.2% | 2026-Q2 |
| Quantinno Capital Management LP added | 197,395 | $6M | 0.1% | 2026-Q2 |
| OSSIAM added | 196,777 | $6M | 0.1% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC trimmed | 183,477 | $5M | 0.1% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP trimmed | 181,274 | $5M | 0.1% | 2026-Q2 |
| Trexquant Investment LP added | 165,061 | $5M | 0.1% | 2026-Q2 |
| PRUDENTIAL FINANCIAL INC added | 161,500 | $5M | 0.1% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC trimmed | 159,736 | $5M | 0.1% | 2026-Q2 |
| Clearline Capital LP trimmed | 152,942 | $5M | 0.1% | 2026-Q2 |
| Lisanti Capital Growth, LLC new | 152,445 | $5M | 0.1% | 2026-Q2 |
| VICTORY CAPITAL MANAGEMENT INC added | 147,705 | $4M | 0.1% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 135,820 | $4M | 0.1% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 122,728 | $4M | 0.1% | 2026-Q2 |
| CIBC WORLD MARKET INC. trimmed | 118,780 | $4M | 0.1% | 2026-Q2 |
| Creative Planning trimmed | 118,110 | $3M | 0.1% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. trimmed | 114,336 | $3M | 0.1% | 2026-Q2 |
| FIFTH THIRD BANCORP added | 113,325 | $3M | 0.1% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 110,534 | $3M | 0.1% | 2026-Q2 |
| ALGERT GLOBAL LLC trimmed | 92,220 | $3M | 0.1% | 2026-Q2 |
| Raiffeisen Bank International AG trimmed | 90,000 | $2M | 0.1% | 2026-Q2 |
| Militia Capital Management LLC trimmed | 89,600 | $3M | 0.1% | 2026-Q2 |
| TUDOR INVESTMENT CORP ET AL added | 80,204 | $2M | 0.1% | 2026-Q2 |
| JUPITER ASSET MANAGEMENT LTD new | 77,112 | $2M | 0.1% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.