ACADIA Pharmaceuticals
ACAD · NASDAQ
$20.44+$0.64 (+3.23%)TodayMarket closed ·
Prev close $19.80
Who owns ACAD
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 61.8% of ACAD’s shares.
- Baker Bros. Advisors LP25.1%
- BlackRock Institutional Trust Company, N.A.11.5%
- State Street Investment Management (US)5.3%
- Vanguard Portfolio Management, LLC5.2%
- Next 6 largest institutions14.8%
- All other shareholders38.2%
| Holder | Shares | % of shares |
|---|---|---|
| Baker Bros. Advisors LP | 42.91M | 25.06% |
| BlackRock Institutional Trust Company, N.A. | 19.68M | 11.49% |
| State Street Investment Management (US) | 9.08M | 5.30% |
| Vanguard Portfolio Management, LLC | 8.84M | 5.16% |
| RTW Investments L.P. | 7.14M | 4.17% |
| Vanguard Capital Management, LLC | 5.76M | 3.37% |
| Dimensional Fund Advisors, L.P. | 3.69M | 2.16% |
| Geode Capital Management, L.L.C. | 3.36M | 1.96% |
| Palo Alto Investors LP | 2.86M | 1.67% |
| Qube Research & Technologies Ltd | 2.45M | 1.43% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| iShares Core S&P Small-Cap ETF | 7.73M | 4.51% |
| State Street SPDR S&P Biotech ETF | 4.19M | 2.45% |
| Vanguard Total Stock Market Index Fund | 4.10M | 2.39% |
| iShares Russell 2000 ETF | 3.33M | 1.95% |
| Vanguard Small-Cap Index Fund | 2.95M | 1.72% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $1.24M (8 trades) of ACAD on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Schneyer Mark C. | Option exercise | 14.29K | — |
| Schneyer Mark C. | Sale | 9.29K | $272.60K |
| Schneyer Mark C. | Sale | 5.00K | $145.00K |
| Schneyer Mark C. | Option exercise | 14.29K | $254.97K |
| Schneyer Mark C. | Option exercise | 5.85K | — |
| Schneyer Mark C. | Sale | 5.85K | $169.64K |
| Schneyer Mark C. | Option exercise | 5.85K | $104.35K |
| Thompson Elizabeth H.Z. | Sale | 50 | $1.31K |
| Thompson Elizabeth H.Z. | Sale | 16.51K | $431.35K |
| Thompson Elizabeth H.Z. | Option exercise | 32.27K | — |
Short interest
Settled Sep 30, 2026
- Shares short
- 8.28M
- Days to cover
- 2.93
- % of shares outstanding
- 4.83%
- Average daily volume
- 2.83M
- Change since last report
- −14.4%
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