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 | FMR LLC CIK 315066 · View history | $47.96M 7,901,218 shares | 0.00% | -40.18K(-0.50%)Reduced | SEC filing ↗ Aug 14, 2025 | ▾ |
| 02 | BlackRock, Inc. CIK 2012383 · View history | $23.91M 3,939,398 shares | 0.00% | -102.90K(-2.50%)Reduced | SEC filing ↗ Aug 12, 2025 | ▾ |
| 03 | ADAR1 Capital Management, LLC CIK 1940272 · View history | $20.49M 3,375,009 shares | 3.33% | +3.38MNew | SEC filing ↗ Aug 14, 2025 | ▾ |
| 04 | ARMISTICE CAPITAL, LLC CIK 1601086 · View history | $13.57M 2,236,000 shares | 0.51% | +40.00K(+1.80%)Added | SEC filing ↗ Aug 14, 2025 | ▾ |
| 05 | VANGUARD GROUP INC CIK 102909 · View history | $13.21M 2,176,227 shares | 0.00% | +906.96K(+71.50%)Added | SEC filing ↗ Aug 11, 2025 | ▾ |
| 06 | Palo Alto Investors LP CIK 1306923 · View history | $7.74M 1,274,753 shares | 1.65% | -384.98K(-23.20%)Reduced | SEC filing ↗ Aug 14, 2025 | ▾ |
| 07 | FEDERATED HERMES, INC. CIK 1056288 · View history | $7.17M 1,181,087 shares | 0.01% | +634.83K(+116.20%)Added | SEC filing ↗ Aug 13, 2025 | ▾ |
| 08 | CITADEL ADVISORS LLC CIK 1423053 · View history | $6.97M 1,147,622 shares | 0.01% | +1.06M(+1,183.70%)Added | SEC filing ↗ Aug 14, 2025 | ▾ |
| 09 | ACADIAN ASSET MANAGEMENT LLC CIK 916542 · View history | $6.18M 1,018,177 shares | 0.01% | +1.02MNew | SEC filing ↗ Aug 7, 2025 | ▾ |
| 10 | STATE STREET CORP CIK 93751 · View history | $6.10M 1,005,002 shares | 0.00% | -516.36K(-33.90%)Reduced | SEC filing ↗ Aug 14, 2025 | ▾ |
| 11 | DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history | $5.84M 962,339 shares | 0.00% | +99.19K(+11.50%)Added | SEC filing ↗ Aug 12, 2025 | ▾ |
| 12 | MORGAN STANLEY CIK 895421 · View history | $5.79M 953,256 shares | 0.00% | +233.27K(+32.40%)Added | SEC filing ↗ Aug 14, 2025 | ▾ |
| 13 | GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history | $5.67M 933,446 shares | 0.00% | -81.35K(-8.00%)Reduced | SEC filing ↗ Aug 8, 2025 | ▾ |
| 14 | Rangeley Capital, LLC CIK 1517796 · View history | $4.34M 715,367 shares | 5.45% | +715.37KNew | SEC filing ↗ Aug 14, 2025 | ▾ |
| 15 | JACOBS LEVY EQUITY MANAGEMENT, INC CIK 884414 · View history | $4.21M 693,154 shares | 0.02% | +674.60K(+3,636.10%)Added | SEC filing ↗ Aug 14, 2025 | ▾ |
| 16 | Balyasny Asset Management L.P. CIK 1218710 · View history | $3.50M 575,792 shares | 0.01% | +575.79KNew | SEC filing ↗ Aug 14, 2025 | ▾ |
| 17 | Trexquant Investment LP CIK 1633445 · View history | $3.36M 552,826 shares | 0.04% | +552.83KNew | SEC filing ↗ Aug 12, 2025 | ▾ |
| 18 | GOLDMAN SACHS GROUP INC CIK 886982 · View history | $3.21M 528,323 shares | 0.00% | +17.86K(+3.50%)Added | SEC filing ↗ Aug 14, 2025 | ▾ |
| 19 | Cubist Systematic Strategies, LLC CIK 1603465 · View history | $3.05M 501,764 shares | 0.03% | +501.76KNew | SEC filing ↗ Aug 14, 2025 | ▾ |
| 20 | Rock Springs Capital Management LP CIK 1595725 · View history | $2.99M 492,601 shares | 0.19% | 0(0.00%)Unchanged | SEC filing ↗ Aug 14, 2025 | ▾ |
Showing 20 / 190 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 190 reporting institutions.
This page includes 20 of 190 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 190 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":"2025Q2","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.