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 | $286.94M 11,584,280 shares | 7.29% | 0(0.00%)Unchanged | SEC filing ↗ May 15, 2024 | ▾ |
| 02 | FMR LLC CIK 315066 · View history | $198.32M 8,006,411 shares | 0.01% | -43.38K(-0.50%)Reduced | SEC filing ↗ May 13, 2024 | ▾ |
| 03 | PRICE T ROWE ASSOCIATES INC /MD/ CIK 80255 · View history | $104.08M 4,201,771 shares | 0.01% | -35.58K(-0.80%)Reduced | SEC filing ↗ May 15, 2024 | ▾ |
| 04 | WELLINGTON MANAGEMENT GROUP LLP CIK 902219 · View history | $92.94M 3,752,147 shares | 0.02% | +1.16M(+44.60%)Added | SEC filing ↗ May 15, 2024 | ▾ |
| 05 | BlackRock Inc. CIK 1364742 · View history | $92.11M 3,718,813 shares | 0.00% | -51.84K(-1.40%)Reduced | SEC filing ↗ May 10, 2024 | ▾ |
| 06 | STATE STREET CORP CIK 93751 · View history | $86.05M 3,473,996 shares | 0.00% | +715.43K(+25.90%)Added | SEC filing ↗ May 15, 2024 | ▾ |
| 07 | Palo Alto Investors LP CIK 1306923 · View history | $41.20M 1,663,448 shares | 4.65% | +3.39K(+0.20%)Added | SEC filing ↗ May 15, 2024 | ▾ |
| 08 | JANUS HENDERSON GROUP PLC CIK 1274173 · View history | $32.44M 1,309,590 shares | 0.02% | -726.39K(-35.70%)Reduced | SEC filing ↗ May 15, 2024 | ▾ |
| 09 | VANGUARD GROUP INC CIK 102909 · View history | $27.87M 1,125,283 shares | 0.00% | +54.73K(+5.10%)Added | SEC filing ↗ May 10, 2024 | ▾ |
| 10 | ARMISTICE CAPITAL, LLC CIK 1601086 · View history | $27.15M 1,096,000 shares | 0.72% | +818.00K(+294.20%)Added | SEC filing ↗ May 15, 2024 | ▾ |
| 11 | Artal Group S.A. CIK 1053906 · Amended · View history | $24.80M 1,001,360 shares | 0.64% | +500.00K(+99.70%)Added | SEC filing ↗ May 17, 2024 | ▾ |
| 12 | GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history | $22.91M 924,580 shares | 0.00% | +19.45K(+2.10%)Added | SEC filing ↗ May 13, 2024 | ▾ |
| 13 | DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history | $21.37M 862,832 shares | 0.01% | -4.80K(-0.60%)Reduced | SEC filing ↗ May 10, 2024 | ▾ |
| 14 | BOXER CAPITAL, LLC CIK 1465837 · View history | $17.09M 690,000 shares | 0.84% | +25.00K(+3.80%)Added | SEC filing ↗ May 15, 2024 | ▾ |
| 15 | MORGAN STANLEY CIK 895421 · Amended · View history | $16.16M 652,468 shares | 0.00% | +170.21K(+35.30%)Added | SEC filing ↗ Oct 17, 2024 | ▾ |
| 16 | Rock Springs Capital Management LP CIK 1595725 · View history | $15.48M 625,048 shares | 0.39% | 0(0.00%)Unchanged | SEC filing ↗ May 15, 2024 | ▾ |
| 17 | First Light Asset Management, LLC CIK 1600004 · View history | $11.02M 444,953 shares | 0.84% | -643.85K(-59.10%)Reduced | SEC filing ↗ May 15, 2024 | ▾ |
| 18 | Finepoint Capital LP CIK 1608126 · View history | $9.97M 402,400 shares | 2.56% | +53.10K(+15.20%)Added | SEC filing ↗ May 14, 2024 | ▾ |
| 19 | NORTHERN TRUST CORP CIK 73124 · View history | $9.84M 397,263 shares | 0.00% | -6.85K(-1.70%)Reduced | SEC filing ↗ May 14, 2024 | ▾ |
| 20 | RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history | $9.65M 389,700 shares | 0.02% | +53.90K(+16.10%)Added | SEC filing ↗ May 13, 2024 | ▾ |
Showing 20 / 170 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 170 reporting institutions.
This page includes 20 of 170 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 170 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":"2024Q1","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.