PROTHENA CORP PUBLIC LTD CO PRTA
CIK 0001559053 · CUSIP G72800108
Quarter-end disclosures, not live holdings.
Top 20 institutions
Weight means this stock's share of the manager's own portfolio.
| # | Manager | Value | Manager weight | Change vs prior | Source | |
|---|---|---|---|---|---|---|
| 01 | EcoR1 Capital, LLC CIK 1587114 · View history | $193.81M 11,584,280 shares | 6.64% | 0(0.00%)Unchanged | SEC filing ↗ Nov 14, 2024 | ▾ |
| 02 | FMR LLC CIK 315066 · View history | $134.96M 8,066,983 shares | 0.01% | +1.31K(0.00%)Added | SEC filing ↗ Nov 13, 2024 | ▾ |
| 03 | WELLINGTON MANAGEMENT GROUP LLP CIK 902219 · View history | $69.91M 4,178,788 shares | 0.01% | +539.36K(+14.80%)Added | SEC filing ↗ Nov 14, 2024 | ▾ |
| 04 | BlackRock, Inc. CIK 2012383 · View history | $67.39M 4,028,387 shares | 0.00% | — | SEC filing ↗ Nov 13, 2024 | ▾ |
| 05 | PRICE T ROWE ASSOCIATES INC /MD/ CIK 80255 · View history | $63.95M 3,822,434 shares | 0.01% | -414.97K(-9.80%)Reduced | SEC filing ↗ Nov 14, 2024 | ▾ |
| 06 | Palo Alto Investors LP CIK 1306923 · View history | $29.08M 1,737,964 shares | 3.78% | +71.59K(+4.30%)Added | SEC filing ↗ Nov 14, 2024 | ▾ |
| 07 | STATE STREET CORP CIK 93751 · View history | $28.02M 1,674,909 shares | 0.00% | -257.56K(-13.30%)Reduced | SEC filing ↗ Nov 14, 2024 | ▾ |
| 08 | ARMISTICE CAPITAL, LLC CIK 1601086 · View history | $27.60M 1,650,000 shares | 0.72% | +90.00K(+5.80%)Added | SEC filing ↗ Nov 14, 2024 | ▾ |
| 09 | VANGUARD GROUP INC CIK 102909 · View history | $21.06M 1,259,101 shares | 0.00% | +87.35K(+7.50%)Added | SEC filing ↗ Nov 13, 2024 | ▾ |
| 10 | Siren, L.L.C. CIK 2005245 · View history | $18.40M 1,099,840 shares | 0.92% | — | SEC filing ↗ Nov 13, 2024 | ▾ |
| 11 | GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history | $16.12M 963,479 shares | 0.00% | -30.80K(-3.10%)Reduced | SEC filing ↗ Nov 12, 2024 | ▾ |
| 12 | DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history | $14.29M 854,050 shares | 0.00% | -7.53K(-0.90%)Reduced | SEC filing ↗ Nov 7, 2024 | ▾ |
| 13 | MORGAN STANLEY CIK 895421 · Amended · View history | $12.03M 719,287 shares | 0.00% | -91.42K(-11.30%)Reduced | SEC filing ↗ May 14, 2025 | ▾ |
| 14 | BOXER CAPITAL, LLC CIK 1465837 · View history | $11.54M 690,000 shares | 0.57% | 0(0.00%)Unchanged | SEC filing ↗ Nov 14, 2024 | ▾ |
| 15 | Rock Springs Capital Management LP CIK 1595725 · View history | $10.46M 625,048 shares | 0.34% | 0(0.00%)Unchanged | SEC filing ↗ Nov 14, 2024 | ▾ |
| 16 | UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC CIK 861177 · View history | $8.81M 526,748 shares | 0.00% | +483.67K(+1,122.90%)Added | SEC filing ↗ Nov 14, 2024 | ▾ |
| 17 | Prosight Management, LP CIK 1617201 · View history | $8.09M 483,467 shares | 2.05% | +196.54K(+68.50%)Added | SEC filing ↗ Nov 14, 2024 | ▾ |
| 18 | Finepoint Capital LP CIK 1608126 · View history | $7.25M 433,471 shares | 0.88% | 0(0.00%)Unchanged | SEC filing ↗ Nov 13, 2024 | ▾ |
| 19 | GOLDMAN SACHS GROUP INC CIK 886982 · View history | $6.95M 415,289 shares | 0.00% | +65.16K(+18.60%)Added | SEC filing ↗ Nov 14, 2024 | ▾ |
| 20 | FEDERATED HERMES, INC. CIK 1056288 · View history | $6.77M 404,903 shares | 0.01% | +361.04K(+823.20%)Added | SEC filing ↗ Nov 13, 2024 | ▾ |
Showing 20 / 166 institutions. The complete set is available through the API.
Coverage & totals by quarter
Reporting institutions by quarter
Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.
Explore all 166 reporting institutions.
This page includes 20 of 166 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.
- Download CSV
- Earlier quarters
- Advanced screening & filtering
- API & AI access
＋ New accounts get free API credits to explore data beyond ownership filings.
For AI agents & developers
The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. This page lists 20 of 166 reporting institutions; totals use the complete disclosed data.
Without an account: the last 3 years, with the row caps stated on the page. A free account opens all history on file on these pages and the CSV of what a page shows. Rows beyond the caps and bulk retrieval go through the authenticated API / MCP / CLI.
MCP https://api.akkrudata.ai/mcp
akkru_institutional_holdings
{"action":"holders","cusip":"G72800108","quarter":"2024Q3","type":"positions","page_size":100}Connect to MCP with OAuth and follow the returned pagination. Credits and usage limits depend on the account.
- MCP endpoint
- https://api.akkrudata.ai/mcp
- API / MCP / CLI documentation
- /documents
- llms.txt
- /llms.txt
Sources, coverage & how to read this data
Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.