Who owns ACADIA Pharmaceuticals (ACAD)
Which tracked institutional funds hold ACAD, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See ACAD 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
103 tracked funds added or opened ACAD while 62 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
ACAD’s largest tracked holder by dollar value, BAKER BROS. ADVISORS LP, sizes it at 5.5% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 5.4pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in ACAD 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 327 tracked filers holding ACAD, 172 increased or opened the position and 164 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
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 ACAD 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 11
- Alyeska Investment Group, L.P.$8M
- Schonfeld Strategic Advisors LLC$7M
- ORBIMED ADVISORS LLC$3M
- Longaeva Partners L.P.$3M
- ROYCE & ASSOCIATES LP$2M
- Campbell & CO Investment Adviser LLC$2M
Full exits 30
- Woodline Partners LP$15M
- CONGRESS ASSET MANAGEMENT CO$4M
- Axecap Investments, LLC$3M
- BESSEMER GROUP INC$3M
- ALGERT GLOBAL LLC$3M
- CANADA LIFE ASSURANCE Co$2M
Largest adds
- BlackRock, Inc.$246M
- BAKER BROS. ADVISORS LP$131M
- STATE STREET CORP$44M
- MARSHALL WACE, LLP$43M
- CITADEL ADVISORS LLC$42M
- Qube Research & Technologies Ltd$41M
Largest trims
- FIRST TRUST ADVISORS LP$70M
- JANE STREET GROUP, LLC$15M
- BRAIDWELL LP$13M
- DEUTSCHE BANK AG\$12M
- FRED ALGER MANAGEMENT, LLC$12M
- VOYA INVESTMENT MANAGEMENT LLC$12M
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 |
|---|---|---|---|---|
| BAKER BROS. ADVISORS LP added | 42,912,904 | $1.1B | 26.4% | 2026-Q2 |
| BlackRock, Inc. added | 22,515,173 | $570M | 13.9% | 2026-Q2 |
| STATE STREET CORP added | 9,076,212 | $230M | 5.6% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 8,838,450 | $224M | 5.4% | 2026-Q2 |
| RTW INVESTMENTS, LP | 7,144,524 | $181M | 4.4% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 5,763,750 | $146M | 3.5% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 3,694,988 | $93M | 2.3% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 3,358,129 | $85M | 2.1% | 2026-Q2 |
| Palo Alto Investors LP trimmed | 2,864,096 | $72M | 1.8% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 2,580,115 | $65M | 1.6% | 2026-Q2 |
| Qube Research & Technologies Ltd added | 2,446,610 | $62M | 1.5% | 2026-Q2 |
| Point72 Asset Management, L.P. trimmed | 2,433,168 | $62M | 1.5% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 2,182,177 | $55M | 1.3% | 2026-Q2 |
| Pictet Asset Management Holding SA trimmed | 1,983,198 | $50M | 1.2% | 2026-Q2 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 1,969,445 | $50M | 1.2% | 2026-Q2 |
| MARSHALL WACE, LLP added | 1,764,838 | $45M | 1.1% | 2026-Q2 |
| D. E. Shaw & Co., Inc. added | 1,697,937 | $43M | 1.0% | 2026-Q2 |
| BRAIDWELL LP trimmed | 1,646,399 | $42M | 1.0% | 2026-Q2 |
| NORGES BANK added | 1,623,308 | $41M | 1.0% | 2026-Q2 |
| Frazier Life Sciences Management, L.P. | 1,438,198 | $36M | 0.9% | 2026-Q2 |
| NORTHERN TRUST CORP added | 1,367,422 | $35M | 0.8% | 2026-Q2 |
| Nuveen, LLC added | 1,348,192 | $34M | 0.8% | 2026-Q2 |
| Artisan Partners Limited Partnership trimmed | 1,325,134 | $34M | 0.8% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 1,300,385 | $33M | 0.8% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 1,282,596 | $32M | 0.8% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 1,206,336 | $31M | 0.7% | 2026-Q2 |
| Allspring Global Investments Holdings, LLC added | 1,132,566 | $29M | 0.7% | 2026-Q2 |
| Rockefeller Capital Management L.P. trimmed | 1,015,420 | $26M | 0.6% | 2026-Q2 |
| MORGAN STANLEY trimmed | 946,639 | $24M | 0.6% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP added | 926,992 | $23M | 0.6% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 912,370 | $23M | 0.6% | 2026-Q2 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ trimmed | 855,435 | $22M | 0.5% | 2026-Q2 |
| Invesco Ltd. added | 810,462 | $21M | 0.5% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC added | 789,196 | $20M | 0.5% | 2026-Q2 |
| Bank of New York Mellon Corp added | 760,629 | $19M | 0.5% | 2026-Q2 |
| PANAGORA ASSET MANAGEMENT INC added | 710,906 | $18M | 0.4% | 2026-Q2 |
| Allianz Asset Management GmbH | 706,664 | $16M | 0.4% | 2026-Q2 |
| Fisher Asset Management, LLC trimmed | 699,230 | $18M | 0.4% | 2026-Q2 |
| FRED ALGER MANAGEMENT, LLC trimmed | 648,611 | $16M | 0.4% | 2026-Q2 |
| RICE HALL JAMES & ASSOCIATES, LLC added | 618,887 | $16M | 0.4% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC trimmed | 606,536 | $15M | 0.4% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC trimmed | 589,924 | $15M | 0.4% | 2026-Q2 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE added | 583,852 | $15M | 0.4% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 522,749 | $13M | 0.3% | 2026-Q2 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. added | 510,000 | $13M | 0.3% | 2026-Q2 |
| GLENMEDE TRUST CO NA added | 488,546 | $12M | 0.3% | 2026-Q2 |
| Hudson Bay Capital Management LP added | 465,000 | $12M | 0.3% | 2026-Q2 |
| UBS Group AG added | 460,053 | $12M | 0.3% | 2026-Q2 |
| JUPITER ASSET MANAGEMENT LTD trimmed | 458,466 | $12M | 0.3% | 2026-Q2 |
| Public Sector Pension Investment Board trimmed | 435,375 | $11M | 0.3% | 2026-Q2 |
| MACKENZIE FINANCIAL CORP added | 420,825 | $11M | 0.3% | 2026-Q2 |
| Ishara Investments LP added | 410,000 | $10M | 0.3% | 2026-Q2 |
| BALYASNY ASSET MANAGEMENT L.P. added | 388,024 | $10M | 0.2% | 2026-Q2 |
| PRUDENTIAL FINANCIAL INC trimmed | 365,125 | $9M | 0.2% | 2026-Q2 |
| SPHERA FUNDS MANAGEMENT LTD. added | 356,534 | $9M | 0.2% | 2026-Q2 |
| Alyeska Investment Group, L.P. new | 310,287 | $8M | 0.2% | 2026-Q2 |
| RHUMBLINE ADVISERS trimmed | 302,902 | $8M | 0.2% | 2026-Q2 |
| Schonfeld Strategic Advisors LLC added | 284,157 | $7M | 0.2% | 2026-Q2 |
| Edgestream Partners, L.P. added | 283,301 | $7M | 0.2% | 2026-Q2 |
| Legal & General Group Plc trimmed | 282,510 | $7M | 0.2% | 2026-Q2 |
| DEUTSCHE BANK AG\ trimmed | 257,759 | $7M | 0.2% | 2026-Q2 |
| Logos Global Management LP trimmed | 250,000 | $6M | 0.2% | 2026-Q2 |
| LAZARD ASSET MANAGEMENT LLC added | 247,569 | $6M | 0.2% | 2026-Q2 |
| FMR LLC trimmed | 240,384 | $6M | 0.1% | 2026-Q2 |
| JPMORGAN CHASE & CO trimmed | 234,706 | $6M | 0.1% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 233,329 | $6M | 0.1% | 2026-Q2 |
| Swiss National Bank trimmed | 230,904 | $6M | 0.1% | 2026-Q2 |
| NORDEA INVESTMENT MANAGEMENT AB added | 230,485 | $6M | 0.1% | 2026-Q2 |
| FRANKLIN RESOURCES INC trimmed | 226,092 | $6M | 0.1% | 2026-Q2 |
| VICTORY CAPITAL MANAGEMENT INC added | 214,712 | $5M | 0.1% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ trimmed | 207,047 | $5M | 0.1% | 2026-Q2 |
| ALPS ADVISORS INC added | 197,049 | $5M | 0.1% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 195,371 | $5M | 0.1% | 2026-Q2 |
| CITIGROUP INC added | 194,948 | $5M | 0.1% | 2026-Q2 |
| ENVESTNET ASSET MANAGEMENT INC added | 194,713 | $5M | 0.1% | 2026-Q2 |
| FIRST TRUST ADVISORS LP trimmed | 184,386 | $5M | 0.1% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND added | 172,522 | $4M | 0.1% | 2026-Q2 |
| Birchview Capital, LP | 171,000 | $4M | 0.1% | 2026-Q2 |
| MARTINGALE ASSET MANAGEMENT L P added | 167,893 | $4M | 0.1% | 2026-Q2 |
| Tetragon Partners GP Ltd added | 167,875 | $4M | 0.1% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. added | 161,066 | $4M | 0.1% | 2026-Q2 |
| GREAT LAKES ADVISORS, LLC trimmed | 151,341 | $4M | 0.1% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC added | 143,688 | $4M | 0.1% | 2026-Q2 |
| STEMPOINT CAPITAL LP trimmed | 143,167 | $4M | 0.1% | 2026-Q2 |
| Squarepoint Ops LLC trimmed | 140,013 | $4M | 0.1% | 2026-Q2 |
| ROYAL BANK OF CANADA trimmed | 139,664 | $4M | 0.1% | 2026-Q2 |
| ORBIMED ADVISORS LLC trimmed | 137,000 | $3M | 0.1% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 133,979 | $3M | 0.1% | 2026-Q2 |
| Erste Asset Management GmbH | 133,700 | $3M | 0.1% | 2026-Q2 |
| Emerald Investment Advisers, LLC added | 131,752 | $3M | 0.1% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd added | 123,724 | $3M | 0.1% | 2026-Q2 |
| Longaeva Partners L.P. new | 117,318 | $3M | 0.1% | 2026-Q2 |
| JACOBS LEVY EQUITY MANAGEMENT, INC trimmed | 116,553 | $3M | 0.1% | 2026-Q2 |
| Trexquant Investment LP trimmed | 116,022 | $3M | 0.1% | 2026-Q2 |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM trimmed | 115,011 | $3M | 0.1% | 2026-Q2 |
| JONES FINANCIAL COMPANIES LLLP added | 113,289 | $3M | 0.1% | 2026-Q2 |
| JANE STREET GROUP, LLC trimmed | 113,257 | $3M | 0.1% | 2026-Q2 |
| Rafferty Asset Management, LLC trimmed | 110,254 | $3M | 0.1% | 2026-Q2 |
| Hennion & Walsh Asset Management, Inc. added | 103,290 | $3M | 0.1% | 2026-Q2 |
| Nan Fung Group Holdings Ltd | 102,984 | $3M | 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.