Who owns ACHC (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-Q1 13F filings. 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
130 tracked funds added or opened ACHC while 52 trimmed or exited it between 2025-Q4 and 2026-Q1 — 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, WELLINGTON MANAGEMENT GROUP LLP, 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 conviction gap — its largest holder concentrates the name more heavily than the typical one.
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 2025-Q4 and 2026-Q1, across 295 tracked filers holding ACHC, 177 increased or opened the position and 140 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 2025-Q4 and 2026-Q1 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 42
- VANGUARD PORTFOLIO MANAGEMENT LLC$118M
- VANGUARD CAPITAL MANAGEMENT LLC$97M
- MAK CAPITAL ONE LLC$57M
- CARRONADE CAPITAL MANAGEMENT, LP$55M
- VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P.$43M
- P2 Capital Partners, LLC$42M
Full exits 22
- VANGUARD GROUP INC$123M
- NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO$10M
- Capitolis Liquid Global Markets LLC$9M
- JANE STREET GROUP, LLC$7M
- TWO SIGMA ADVISERS, LP$6M
- Silver Rock Financial LP$5M
Largest adds
- MORGAN STANLEY$83M
- FMR LLC$82M
- DME Capital Management, LP$47M
- CITADEL ADVISORS LLC$44M
- WELLINGTON MANAGEMENT GROUP LLP$44M
- DEERFIELD MANAGEMENT COMPANY, L.P.$42M
Largest trims
- Walleye Capital LLC$23M
- Invenomic Capital Management LP$19M
- M&T Bank Corp$17M
- GOLDMAN SACHS GROUP INC$15M
- HAWK RIDGE CAPITAL MANAGEMENT LP$14M
- D. E. Shaw & Co., Inc.$13M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 9,022,180 | $211M | 6.4% | 2026-Q1 |
| BlackRock, Inc. trimmed | 7,744,988 | $181M | 5.5% | 2026-Q1 |
| FMR LLC added | 6,788,848 | $159M | 4.8% | 2026-Q1 |
| Khrom Capital Management LLC trimmed | 5,194,625 | $122M | 3.7% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 5,061,438 | $118M | 3.6% | 2026-Q1 |
| DEERFIELD MANAGEMENT COMPANY, L.P. | 4,520,000 | $106M | 3.2% | 2026-Q1 |
| DME Capital Management, LP added | 4,518,381 | $106M | 3.2% | 2026-Q1 |
| MORGAN STANLEY added | 4,491,067 | $105M | 3.2% | 2026-Q1 |
| ABRAMS BISON INVESTMENTS, LLC | 4,380,000 | $102M | 3.1% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 4,154,801 | $97M | 3.0% | 2026-Q1 |
| Jefferies Financial Group Inc. added | 3,611,883 | $84M | 2.6% | 2026-Q1 |
| STATE STREET CORP trimmed | 3,218,751 | $75M | 2.3% | 2026-Q1 |
| UBS Group AG added | 2,833,862 | $66M | 2.0% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 2,716,425 | $64M | 1.9% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 2,581,747 | $60M | 1.8% | 2026-Q1 |
| MAK CAPITAL ONE LLC new | 2,432,962 | $57M | 1.7% | 2026-Q1 |
| CITIGROUP INC trimmed | 2,352,318 | $55M | 1.7% | 2026-Q1 |
| CARRONADE CAPITAL MANAGEMENT, LP new | 2,337,236 | $55M | 1.7% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC trimmed | 2,240,428 | $52M | 1.6% | 2026-Q1 |
| NEUBERGER BERMAN GROUP LLC added | 1,961,384 | $46M | 1.4% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 1,900,947 | $44M | 1.4% | 2026-Q1 |
| VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P. added | 1,839,125 | $43M | 1.3% | 2026-Q1 |
| P2 Capital Partners, LLC trimmed | 1,774,484 | $42M | 1.3% | 2026-Q1 |
| FARALLON CAPITAL MANAGEMENT LLC added | 1,736,800 | $41M | 1.2% | 2026-Q1 |
| FIRST TRUST ADVISORS LP added | 1,689,442 | $40M | 1.2% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,661,281 | $39M | 1.2% | 2026-Q1 |
| BROWN ADVISORY INC added | 1,335,454 | $31M | 1.0% | 2026-Q1 |
| MAVERICK CAPITAL LTD added | 1,314,116 | $31M | 0.9% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 1,231,172 | $29M | 0.9% | 2026-Q1 |
| Invenomic Capital Management LP trimmed | 1,182,331 | $28M | 0.8% | 2026-Q1 |
| DEUTSCHE BANK AG\ added | 1,158,860 | $27M | 0.8% | 2026-Q1 |
| Allianz Asset Management GmbH added | 890,278 | $21M | 0.6% | 2026-Q1 |
| Rubric Capital Management LP | 850,000 | $20M | 0.6% | 2026-Q1 |
| HAWK RIDGE CAPITAL MANAGEMENT LP trimmed | 836,033 | $20M | 0.6% | 2026-Q1 |
| Man Group plc added | 794,474 | $19M | 0.6% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC trimmed | 746,439 | $17M | 0.5% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 742,902 | $17M | 0.5% | 2026-Q1 |
| NORTHERN TRUST CORP added | 728,941 | $17M | 0.5% | 2026-Q1 |
| CIBC Bancorp USA Inc. new | 690,530 | $16M | 0.5% | 2026-Q1 |
| Buckley Capital Advisors, LLC new | 665,100 | $16M | 0.5% | 2026-Q1 |
| BRAIDWELL LP new | 645,900 | $15M | 0.5% | 2026-Q1 |
| Freestone Grove Partners LP trimmed | 636,116 | $15M | 0.5% | 2026-Q1 |
| PALISADE CAPITAL MANAGEMENT, LP trimmed | 613,372 | $14M | 0.4% | 2026-Q1 |
| PFM Health Sciences, LP trimmed | 582,745 | $14M | 0.4% | 2026-Q1 |
| FRONTIER CAPITAL MANAGEMENT CO LLC added | 575,243 | $13M | 0.4% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 568,418 | $13M | 0.4% | 2026-Q1 |
| PRINCIPAL FINANCIAL GROUP INC added | 558,486 | $13M | 0.4% | 2026-Q1 |
| Point72 Asset Management, L.P. added | 536,517 | $13M | 0.4% | 2026-Q1 |
| Amundi added | 525,084 | $12M | 0.4% | 2026-Q1 |
| Aristotle Capital Boston, LLC trimmed | 521,667 | $12M | 0.4% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC added | 518,606 | $12M | 0.4% | 2026-Q1 |
| Invesco Ltd. trimmed | 495,526 | $12M | 0.4% | 2026-Q1 |
| Bank of New York Mellon Corp added | 483,950 | $11M | 0.3% | 2026-Q1 |
| Aberdeen Group plc trimmed | 464,385 | $11M | 0.3% | 2026-Q1 |
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC trimmed | 419,980 | $10M | 0.3% | 2026-Q1 |
| KINGDON CAPITAL MANAGEMENT, L.L.C. trimmed | 396,192 | $9M | 0.3% | 2026-Q1 |
| Woodline Partners LP trimmed | 390,830 | $9M | 0.3% | 2026-Q1 |
| FINDELL CAPITAL MANAGEMENT LLC new | 380,000 | $9M | 0.3% | 2026-Q1 |
| GW&K Investment Management, LLC added | 354,966 | $8M | 0.3% | 2026-Q1 |
| Gotham Asset Management, LLC added | 352,622 | $8M | 0.3% | 2026-Q1 |
| STRS OHIO added | 347,637 | $8M | 0.2% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 344,388 | $8M | 0.2% | 2026-Q1 |
| NATIXIS ADVISORS, LLC added | 330,570 | $8M | 0.2% | 2026-Q1 |
| Public Sector Pension Investment Board added | 330,079 | $8M | 0.2% | 2026-Q1 |
| SEI INVESTMENTS CO added | 316,398 | $7M | 0.2% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN added | 311,330 | $7M | 0.2% | 2026-Q1 |
| 13D Management LLC new | 294,000 | $7M | 0.2% | 2026-Q1 |
| ROYAL BANK OF CANADA added | 278,265 | $7M | 0.2% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 275,313 | $6M | 0.2% | 2026-Q1 |
| NEW YORK STATE COMMON RETIREMENT FUND | 260,899 | $6M | 0.2% | 2026-Q1 |
| WINTON GROUP Ltd added | 252,002 | $6M | 0.2% | 2026-Q1 |
| Clearline Capital LP trimmed | 248,826 | $6M | 0.2% | 2026-Q1 |
| PRELUDE CAPITAL MANAGEMENT, LLC added | 241,970 | $6M | 0.2% | 2026-Q1 |
| CONGRESS ASSET MANAGEMENT CO added | 236,097 | $6M | 0.2% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC trimmed | 232,297 | $5M | 0.2% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC added | 229,971 | $5M | 0.2% | 2026-Q1 |
| CLOUGH CAPITAL PARTNERS L P added | 229,127 | $5M | 0.2% | 2026-Q1 |
| Legal & General Group Plc trimmed | 225,560 | $5M | 0.2% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 8,643,931 | $123M | 3.7% | 2025-Q4 stale |
| Sachem Head Capital Management LP | 4,215,000 | $104M | 3.2% | 2025-Q3 stale |
| T. Rowe Price Investment Management, Inc. trimmed | 949,569 | $29M | 0.9% | 2025-Q1 stale |
| 8 KNOTS MANAGEMENT, LLC trimmed | 844,850 | $19M | 0.6% | 2025-Q2 stale |
| ADAGE CAPITAL PARTNERS GP, L.L.C. trimmed | 538,087 | $13M | 0.4% | 2025-Q3 stale |
| CANYON CAPITAL ADVISORS LLC | 521,774 | $13M | 0.4% | 2025-Q3 stale |
| BALYASNY ASSET MANAGEMENT L.P. trimmed | 401,394 | $12M | 0.4% | 2025-Q1 stale |
| Teca Partners, LP added | 467,343 | $12M | 0.4% | 2025-Q3 stale |
| Qube Research & Technologies Ltd added | 502,464 | $11M | 0.3% | 2025-Q2 stale |
| J. Goldman & Co LP trimmed | 493,462 | $11M | 0.3% | 2025-Q2 stale |
| Silvercrest Asset Management Group LLC added | 489,266 | $11M | 0.3% | 2025-Q2 stale |
| HIGHLAND PEAK CAPITAL, LLC added | 326,837 | $10M | 0.3% | 2025-Q1 stale |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO added | 213,752 | $10M | 0.3% | 2025-Q4 stale |
| Estuary Capital Management LP new | 391,056 | $10M | 0.3% | 2025-Q3 stale |
| M&G PLC new | 419,416 | $10M | 0.3% | 2025-Q2 stale |
| Aryeh Capital Management Ltd. added | 376,485 | $9M | 0.3% | 2025-Q3 stale |
| Capitolis Liquid Global Markets LLC new | 631,000 | $9M | 0.3% | 2025-Q4 stale |
| Beach Point Capital Management LP | 355,540 | $9M | 0.3% | 2025-Q3 stale |
| JANE STREET GROUP, LLC added | 460,843 | $7M | 0.2% | 2025-Q4 stale |
| Prosight Management, LP added | 250,000 | $6M | 0.2% | 2025-Q3 stale |
| TWO SIGMA ADVISERS, LP added | 397,322 | $6M | 0.2% | 2025-Q4 stale |
| Clearbridge Investments, LLC added | 227,590 | $6M | 0.2% | 2025-Q3 stale |
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.