ACADIA Pharmaceuticals Inc.
ACADIA Pharmaceuticals Inc. (ACAD) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · ACAD · as of Sep 30, 2025
Ownership Breakdown
356
Institutional Holders
▲ 25 vs Q2
$3.58B
Total Inst. Value
▼ $87.89M vs Q2
171.24M
Shares Outstanding
freeFloat 98.66%
167.69M
13F Shares Held
▼ 2.31M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
ACAD largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
BAKER BROS. ADVISORS LP pharmaceutical preparations | 42.90M | 25.56% | 25.56% | $915.42B | Nov 14, 2025 | — held |
BLACKROCK, INC. pharmaceutical preparations | 20.27M | 12.08% | 12.08% | $432.53B | Nov 12, 2025 | ▼ 383.8K |
VANGUARD GROUP INC pharmaceutical preparations | 15.18M | 9.04% | 9.04% | $323.93B | Nov 7, 2025 | ▼ 84.9K |
STATE STREET CORP pharmaceutical preparations | 7.26M | 4.32% | 4.32% | $154.83B | Nov 14, 2025 | ▲ 1.08M |
RTW INVESTMENTS, LP pharmaceutical preparations | 7.14M | 4.26% | 4.26% | $152.46B | Nov 14, 2025 | ▼ 1.85M |
GEODE CAPITAL MANAGEMENT, LLC pharmaceutical preparations | 3.13M | 1.87% | 1.87% | $66.86B | Nov 12, 2025 | ▲ 108.5K |
DIMENSIONAL FUND ADVISORS LP pharmaceutical preparations | 2.80M | 1.67% | 1.67% | $59.71B | Nov 12, 2025 | ▲ 402.5K |
ADAGE CAPITAL PARTNERS GP, L.L.C. pharmaceutical preparations | 2.48M | 1.48% | 1.48% | $53.01B | Nov 14, 2025 | ▲ 1.88M |
PALO ALTO INVESTORS LP pharmaceutical preparations | 2.47M | 1.47% | 1.47% | $52.64B | Nov 14, 2025 | ▼ 96.5K |
BRAIDWELL LP pharmaceutical preparations | 2.38M | 1.42% | 1.42% | $50.76B | Nov 14, 2025 | NEW |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
27
Increased
+13.09M shares1
New Positions
first time holders20
Decreased
−9.65M shares0
Sold Out
fully exitedNet shares change (top 50)
+3.44M
+13.09M / −9.65M
Net new holders
+8
1 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
ACAD insider trading · insider activity
Source: SEC Form 4
4
Buy transactions
9
Sell transactions
0.44
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
BAKER BROS. ADVISORS LP
| May 29, 2026 | Award | 18,622 | — | — | 39.38M | Form 4 ↗ |
BAKER BROS. ADVISORS LP
| May 29, 2026 | Award | 18,622 | — | — | 3.68M | Form 4 ↗ |
BAKER BROS. ADVISORS LP
| May 29, 2026 | Award | 32,008 | $21.66 | $693.3K | 32.0K | Form 4 ↗ |
HARRIGAN EDMUND director | May 29, 2026 | Award | 16,004 | $21.66 | $346.6K | 16.0K | Form 4 ↗ |
HARRIGAN EDMUND director | May 29, 2026 | Award | 9,311 | — | — | 9.3K | Form 4 ↗ |
Ndu Adora director | May 29, 2026 | Award | 16,004 | $21.66 | $346.6K | 16.0K | Form 4 ↗ |
Ndu Adora director | May 29, 2026 | Award | 9,311 | — | — | 9.3K | Form 4 ↗ |
Brege Laura director | May 29, 2026 | Award | 16,004 | $21.66 | $346.6K | 16.0K | Form 4 ↗ |
Brege Laura director | May 29, 2026 | Award | 9,311 | — | — | 9.3K | Form 4 ↗ |
Poole Jonathan director | May 29, 2026 | Award | 16,004 | $21.66 | $346.6K | 16.0K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
ACADIA Pharmaceuticals Inc. (ACAD) is primarily owned by institutional investors, who hold approximately 97.9% of total shares outstanding. Company insiders own approximately 1.34%, while retail and public investors account for the remaining 0.73%.
The largest institutional shareholder of ACADIA Pharmaceuticals Inc. is BAKER BROS. ADVISORS LP, holding approximately 42.90 million shares — equal to 25.56% of outstanding shares — as of September 30, 2025.
A total of 356 institutional investors currently hold ACAD stock, with a combined institutional value of approximately $3.58 billion as of the most recent 13F filing period.
Frequently asked questions
ACAD ownershipACADIA Pharmaceuticals Inc. (ACAD) is primarily owned by institutional investors, who hold approximately 97.9% of shares. The largest shareholder is BAKER BROS. ADVISORS LP with a 25.56% stake. Company insiders hold 1.34%. Data sourced from SEC Form 13F as of September 30, 2025.