Prothena Corp Public Ltd Co
PRTA- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001559053
In the last 90 days, Prothena Corp Public Ltd Co insiders filed 4 open-market purchases and 2 sales; 187 institutions reported holding it in 13F filings for Q2 2026, worth $462.7M in total; no superinvestor holds it.
13F holders, Q1 2025
Institutional positions in Prothena Corp Public Ltd Co as of Mar 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 161
- −8 vs. Q4 2024
- Shares held
- 52.3M
- −1.06M (−2.0%) vs. Q4 2024
- Total value
- $647.2M
- −$91.9M (−12.4%) vs. Q4 2024
- New holders
- 17
- 42 more added
- Sold out
- 25
- 58 more reduced
2 institutions that held it in Q4 2024 haven't filed for Q1 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2024: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting PRTA on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 187 | $462.7M |
| Q1 2026 | 186 | $459.5M |
| Q4 2025 | 182 | $451.6M |
| Q3 2025 | 187 | $415.8M |
| Q2 2025 | 189 | $253.6M |
| Q1 2025 | 161 | $647.2M |
| Q4 2024 | 171 | $741.3M |
| Q3 2024 | 164 | $855.8M |
| Q2 2024 | 160 | $1.05B |
| Q1 2024 | 169 | $1.33B |
| Q4 2023 | 187 | $1.95B |
| Q3 2023 | 187 | $2.56B |
| Q2 2023 | 196 | $3.54B |
| Q1 2023 | 192 | $2.51B |
| Q4 2022 | 201 | $2.98B |
| Q3 2022 | 183 | $2.69B |
| Q2 2022 | 167 | $1.21B |
| Q1 2022 | 174 | $1.61B |
| Q4 2021 | 196 | $2.12B |
| Q3 2021 | 192 | $2.92B |
| Q2 2021 | 156 | $2.08B |
| Q1 2021 | 146 | $1.00B |
Institutions, Q1 2025
Shares, value and share of portfolio for each institution holding Prothena Corp Public Ltd Co; share changes are against Q4 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| EcoR1 Capital, LLC | 11,584,280 | $143.4M | 8.53% | 00.0% | Unchanged |
| FMR LLC | 7,941,402 | $98.3M | 0.01% | −129,907−1.6% | Reduced |
| Wellington Management Group LLP | 5,199,528 | $64.3M | 0.01% | +68,652+1.3% | Added |
| BlackRock, Inc. | 4,042,301 | $50.0M | 0.00% | −80,075−1.9% | Reduced |
| Price T Rowe Associates Inc | 3,455,856 | $42.8M | 0.01% | −229,852−6.2% | Reduced |
| Armistice Capital, LLC | 2,196,000 | $27.2M | 0.73% | −40,000−1.8% | Reduced |
| Palo Alto Investors LP | 1,659,734 | $20.5M | 3.91% | −78,230−4.5% | Reduced |
| State Street Corp | 1,521,364 | $18.8M | 0.00% | −340,277−18.3% | Reduced |
| Siren, L.L.C. | 1,283,555 | $15.9M | 0.90% | +183,715+16.7% | Added |
| Vanguard Group Inc | 1,269,271 | $15.7M | 0.00% | −134,567−9.6% | Reduced |
| Geode Capital Management, LLC | 1,014,792 | $12.6M | 0.00% | +50,484+5.2% | Added |
| Dimensional Fund Advisors LP | 863,148 | $10.7M | 0.00% | −1,685−0.2% | Reduced |
| Morgan Stanley | 719,988 | $8.91M | 0.00% | +498+0.1% | Added |
| Boxer Capital Management, LLC | 690,000 | $8.54M | 2.57% | 00.0% | Unchanged |
| Finepoint Capital LP | 640,071 | $7.92M | 1.34% | −17,000−2.6% | Reduced |
| Federated Hermes, Inc. | 546,255 | $6.76M | 0.01% | −199,922−26.8% | Reduced |
| Goldman Sachs Group Inc | 510,462 | $6.32M | 0.00% | −46,064−8.3% | Reduced |
| Rock Springs Capital Management LP | 492,601 | $6.10M | 0.35% | −152,000−23.6% | Reduced |
| Prosight Management, LP | 408,122 | $5.05M | 1.66% | −10,000−2.4% | Reduced |
| UBS Asset Management Americas Inc | 381,652 | $4.72M | 0.00% | +1440.0% | Added |
| Northern Trust Corp | 373,703 | $4.62M | 0.00% | −30,793−7.6% | Reduced |
| JPMorgan Chase & Co | 371,965 | $4.60M | 0.00% | −15,385−4.0% | Reduced |
| Mariner, LLC | 354,650 | $4.39M | 0.01% | +10,733+3.1% | Added |
| Birchview Capital, LP | 332,974 | $4.12M | 3.58% | +28,400+9.3% | Added |
| Charles Schwab Investment Management Inc | 319,607 | $3.96M | 0.00% | −7,544−2.3% | Reduced |
| Nordea Investment Management AB | 307,987 | $3.74M | 0.00% | +307,987 | New |
| UBS Group AG | 244,479 | $3.03M | 0.00% | −126,808−34.2% | Reduced |
| Renaissance Technologies LLC | 239,900 | $2.97M | 0.00% | +38,000+18.8% | Added |
| DCF Advisers, LLC | 195,000 | $2.41M | 1.30% | +91,500+88.4% | Added |
| PDT Partners, LLC | 150,316 | $1.86M | 0.13% | +23,113+18.2% | Added |
| Nuveen, LLC | 149,961 | $1.86M | 0.00% | +149,961 | New |
| Bank of New York Mellon Corp | 146,009 | $1.81M | 0.00% | −4,229−2.8% | Reduced |
| Jane Street Group, LLC | 132,640 | $1.64M | 0.00% | +77,112+138.9% | Added |
| Bank of America Corp | 131,986 | $1.63M | 0.00% | +12,979+10.9% | Added |
| Pinnacle Associates Ltd | 100,259 | $1.24M | 0.02% | −2,822−2.7% | Reduced |
| Deutsche Bank AG | 95,810 | $1.19M | 0.00% | −160−0.2% | Reduced |
| Connor, Clark & Lunn Investment Management Ltd. | 91,482 | $1.13M | 0.00% | −358−0.4% | Reduced |
| Citadel Advisors LLC | 89,399 | $1.11M | 0.00% | +47,881+115.3% | Added |
| Duncan Williams Asset Management, LLC | 88,339 | $1.09M | 0.39% | +19,140+27.7% | Added |
| Barclays PLC | 83,381 | $1.03M | 0.00% | −21,957−20.8% | Reduced |
| Hennion & Walsh Asset Management, Inc. | 77,637 | $960.8K | 0.04% | +25,353+48.5% | Added |
| Susquehanna International Group, LLP | 77,243 | $955.9K | 0.00% | +51,974+205.7% | Added |
| Susquehanna Fundamental Investments, LLC | 74,772 | $925.3K | 0.02% | −5,905−7.3% | Reduced |
| SG Americas Securities, LLC | 72,559 | $898.0K | 0.00% | +34,947+92.9% | Added |
| Swiss National Bank | 68,700 | $850.2K | 0.00% | 00.0% | Unchanged |
| Rhumbline Advisers | 66,079 | $817.7K | 0.00% | −1,036−1.5% | Reduced |
| Citigroup Inc | 65,826 | $814.6K | 0.00% | −2,607−3.8% | Reduced |
| Manufacturers Life Insurance Company, The | 65,231 | $807.2K | 0.00% | −4,953−7.1% | Reduced |
| TD Asset Management Inc | 62,694 | $775.8K | 0.00% | −2,000−3.1% | Reduced |
| Norges Bank | 57,454 | $711.0K | 0.00% | 00.0% | Unchanged |
| Millennium Management LLC | 52,467 | $649.3K | 0.00% | −70,538−57.3% | Reduced |
| Alliancebernstein L.P. | 46,753 | $578.6K | 0.00% | 00.0% | Unchanged |
| Wells Fargo & Company | 45,889 | $567.9K | 0.00% | −6,934−13.1% | Reduced |
| Rafferty Asset Management, LLC | 43,978 | $544.2K | 0.00% | −33,694−43.4% | Reduced |
| Massachusetts Financial Services Co | 43,816 | $542.2K | 0.00% | −999−2.2% | Reduced |
| Legal & General Group Plc | 41,354 | $511.8K | 0.00% | −51−0.1% | Reduced |
| ExodusPoint Capital Management, LP | 41,272 | $511.0K | 0.01% | +41,272 | New |
| Thrivent Financial for Lutherans | 38,626 | $478.0K | 0.00% | 00.0% | Unchanged |
| Alps Advisors Inc | 37,956 | $469.7K | 0.00% | −5,554−12.8% | Reduced |
| Invesco Ltd. | 37,638 | $465.8K | 0.00% | −5,208−12.2% | Reduced |
| American Century Companies Inc | 34,836 | $431.1K | 0.00% | +4,437+14.6% | Added |
| Intech Investment Management LLC | 33,375 | $413.0K | 0.00% | +10,992+49.1% | Added |
| California State Teachers Retirement System | 33,243 | $411.4K | 0.00% | 00.0% | Unchanged |
| Focused Wealth Management, Inc | 32,129 | $397.6K | 0.05% | 00.0% | Unchanged |
| RBF Capital, LLC | 29,200 | $361.4K | 0.02% | 00.0% | Unchanged |
| Mirae Asset Global ETFs Holdings Ltd. | 27,334 | $339.8K | 0.00% | +65+0.2% | Added |
| MetLife Investment Management | 25,402 | $314.4K | 0.00% | −471−1.8% | Reduced |
| Edgewood Management LLC | 24,060 | $297.7K | 0.00% | 00.0% | Unchanged |
| Ensign Peak Advisors, Inc | 21,643 | $267.8K | 0.00% | 00.0% | Unchanged |
| Purkiss Capital Advisors LLC | 21,629 | $267.7K | 0.20% | +10,900+101.6% | Added |
| Dark Forest Capital Management LP | 21,059 | $260.6K | 0.01% | +21,059 | New |
| Handelsbanken Fonder AB | 20,900 | $259.0K | 0.00% | 00.0% | Unchanged |
| Corebridge Financial, Inc. | 20,831 | $257.8K | 0.00% | −309−1.5% | Reduced |
| Franklin Resources Inc | 19,747 | $244.4K | 0.00% | +60+0.3% | Added |
| Foundation Wealth Management, LLC | 19,471 | $241.0K | 0.19% | 00.0% | Unchanged |
| Janus Henderson Group PLC | 18,047 | $237.2K | 0.00% | 00.0% | Unchanged |
| Jacobs Levy Equity Management, Inc | 18,553 | $229.6K | 0.00% | +18,553 | New |
| D. E. Shaw & Co., Inc. | 17,803 | $220.3K | 0.00% | +17,803 | New |
| Man Group plc | 17,000 | $210.4K | 0.00% | −60,430−78.0% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 16,040 | $198.5K | 0.00% | +10+0.1% | Added |
| Two Sigma Investments, LP | 16,033 | $198.4K | 0.00% | −22,361−58.2% | Reduced |
| State Board of Administration of Florida Retirement System | 15,386 | $190.4K | 0.00% | 00.0% | Unchanged |
| Shelton Capital Management | 15,233 | $188.5K | 0.00% | +15,233 | New |
| DekaBank Deutsche Girozentrale | 14,000 | $180.0K | 0.00% | 00.0% | Unchanged |
| New York State Common Retirement Fund | 14,279 | $176.7K | 0.00% | 00.0% | Unchanged |
| HRT Financial LP | 14,036 | $173.0K | 0.00% | +14,036 | New |
| Commonwealth Equity Services, LLC | 13,320 | $165.0K | 0.00% | +13,320 | New |
| Cresset Asset Management, LLC | 13,125 | $162.4K | 0.00% | −6,309−32.5% | Reduced |
| HSBC Holdings PLC | 13,088 | $159.7K | 0.00% | −11,091−45.9% | Reduced |
| Cary Street Partners Financial LLC | 12,500 | $154.7K | 0.00% | 00.0% | Unchanged |
| Raymond James Financial Inc | 12,487 | $154.5K | 0.00% | −624−4.8% | Reduced |
| Virtus Investment Advisers, Inc. | 11,891 | $147.2K | 0.04% | +11,891 | New |
| Voya Investment Management LLC | 11,684 | $144.6K | 0.00% | −1,145−8.9% | Reduced |
| ProShare Advisors LLC | 11,632 | $143.9K | 0.00% | −2,892−19.9% | Reduced |
| China Universal Asset Management Co., Ltd. | 10,797 | $133.6K | 0.01% | −612−5.4% | Reduced |
| Creative Planning | 10,690 | $132.3K | 0.00% | −5,371−33.4% | Reduced |
| Cambridge Investment Research Advisors, Inc. | 10,164 | $126.0K | 0.00% | +10,164 | New |
| Police & Firemen's Retirement System of New Jersey | 10,113 | $125.1K | 0.00% | 00.0% | Unchanged |
| BNP Paribas Arbitrage, SA | 9,577 | $118.5K | 0.00% | −87,806−90.2% | Reduced |
| Chicago Partners Investment Group LLC | 14,512 | $105.8K | 0.00% | +3,315+29.6% | Added |