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 2024
Institutional positions in Prothena Corp Public Ltd Co as of Mar 31, 2024. 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
- 169
- −16 vs. Q4 2023
- Shares held
- 53.5M
- −26.4K (0.0%) vs. Q4 2023
- Total value
- $1.33B
- −$619.7M (−31.9%) vs. Q4 2023
- New holders
- 25
- 58 more added
- Sold out
- 41
- 61 more reduced
2 institutions that held it in Q4 2023 haven't filed for Q1 2024 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2023: 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 2024
Shares, value and share of portfolio for each institution holding Prothena Corp Public Ltd Co; share changes are against Q4 2023.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| EcoR1 Capital, LLC | 11,584,280 | $286.9M | 7.29% | 00.0% | Unchanged |
| FMR LLC | 8,006,411 | $198.3M | 0.01% | −43,385−0.5% | Reduced |
| Price T Rowe Associates Inc | 4,201,771 | $104.1M | 0.01% | −35,580−0.8% | Reduced |
| Wellington Management Group LLP | 3,752,147 | $92.9M | 0.02% | +1,158,045+44.6% | Added |
| BlackRock Inc. | 3,718,813 | $92.1M | 0.00% | −51,837−1.4% | Reduced |
| State Street Corp | 3,473,996 | $86.1M | 0.00% | +715,432+25.9% | Added |
| Palo Alto Investors LP | 1,663,448 | $41.2M | 4.65% | +3,391+0.2% | Added |
| Janus Henderson Group PLC | 1,309,590 | $32.4M | 0.02% | −726,394−35.7% | Reduced |
| Vanguard Group Inc | 1,125,283 | $27.9M | 0.00% | +54,728+5.1% | Added |
| Armistice Capital, LLC | 1,096,000 | $27.1M | 0.72% | +818,000+294.2% | Added |
| Artal Group S.A. | 1,001,360 | $24.8M | 0.64% | +500,000+99.7% | Added |
| Geode Capital Management, LLC | 924,580 | $22.9M | 0.00% | +19,455+2.1% | Added |
| Dimensional Fund Advisors LP | 862,832 | $21.4M | 0.01% | −4,803−0.6% | Reduced |
| Boxer Capital, LLC | 690,000 | $17.1M | 0.84% | +25,000+3.8% | Added |
| Morgan Stanley | 652,468 | $16.2M | 0.00% | +170,208+35.3% | Added |
| Rock Springs Capital Management LP | 625,048 | $15.5M | 0.39% | 00.0% | Unchanged |
| First Light Asset Management, LLC | 444,953 | $11.0M | 0.84% | −643,848−59.1% | Reduced |
| Finepoint Capital LP | 402,400 | $9.97M | 2.56% | +53,100+15.2% | Added |
| Northern Trust Corp | 397,263 | $9.84M | 0.00% | −6,847−1.7% | Reduced |
| Renaissance Technologies LLC | 389,700 | $9.65M | 0.02% | +53,900+16.1% | Added |
| UBS Asset Management Americas Inc | 375,165 | $9.29M | 0.00% | +83,298+28.5% | Added |
| Granahan Investment Management Inc | 333,920 | $8.27M | 0.29% | −83,237−20.0% | Reduced |
| Millennium Management LLC | 322,241 | $7.98M | 0.01% | +284,585+755.7% | Added |
| Charles Schwab Investment Management Inc | 318,905 | $7.90M | 0.00% | +5,675+1.8% | Added |
| Goldman Sachs Group Inc | 308,887 | $7.65M | 0.00% | −24,899−7.5% | Reduced |
| Rafferty Asset Management, LLC | 303,455 | $7.52M | 0.03% | +96,036+46.3% | Added |
| JPMorgan Chase & Co | 298,091 | $7.38M | 0.00% | −60,387−16.8% | Reduced |
| Citigroup Inc | 259,872 | $6.44M | 0.01% | +172,291+196.7% | Added |
| Nuveen Asset Management, LLC | 243,022 | $6.02M | 0.00% | −57,797−19.2% | Reduced |
| Bank of America Corp | 240,343 | $5.95M | 0.00% | −47,012−16.4% | Reduced |
| Citadel Advisors LLC | 234,926 | $5.82M | 0.01% | +96,339+69.5% | Added |
| UBS Group AG | 198,680 | $4.92M | 0.00% | +66,183+50.0% | Added |
| Qube Research & Technologies Ltd | 195,446 | $4.84M | 0.01% | −8,236−4.0% | Reduced |
| Mariner, LLC | 176,966 | $4.38M | 0.01% | −1,458−0.8% | Reduced |
| Prosight Management, LP | 170,469 | $4.22M | 1.17% | −59,070−25.7% | Reduced |
| Birchview Capital, LP | 169,574 | $4.20M | 3.42% | 00.0% | Unchanged |
| Systematic Financial Management LP | 153,992 | $3.81M | 0.11% | +4,233+2.8% | Added |
| Bank of New York Mellon Corp | 145,845 | $3.61M | 0.00% | −296,464−67.0% | Reduced |
| Cubist Systematic Strategies, LLC | 135,321 | $3.35M | 0.04% | +125,442+1,269.8% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 131,905 | $3.27M | 0.01% | −24,037−15.4% | Reduced |
| Pinnacle Associates Ltd | 125,264 | $3.10M | 0.05% | −483−0.4% | Reduced |
| AXA S.A. | 120,650 | $2.99M | 0.01% | +330.0% | Added |
| TD Asset Management Inc | 116,338 | $2.88M | 0.00% | −30,200−20.6% | Reduced |
| DCF Advisers, LLC | 107,000 | $2.65M | 1.60% | +23,000+27.4% | Added |
| Manufacturers Life Insurance Company, The | 82,581 | $2.05M | 0.00% | −3,041−3.6% | Reduced |
| Swiss National Bank | 79,200 | $1.96M | 0.00% | 00.0% | Unchanged |
| Rhumbline Advisers | 63,500 | $1.57M | 0.00% | +1,580+2.6% | Added |
| Credit Suisse AG | 60,202 | $1.49M | 0.00% | +898+1.5% | Added |
| Susquehanna International Group, LLP | 59,980 | $1.49M | 0.00% | +26,383+78.5% | Added |
| Barclays PLC | 58,332 | $1.44M | 0.00% | −84,275−59.1% | Reduced |
| Norges Bank | 57,454 | $1.42M | 0.00% | −47,110−45.1% | Reduced |
| Pier Capital, LLC | 57,020 | $1.41M | 0.19% | +191+0.3% | Added |
| Jane Street Group, LLC | 54,396 | $1.35M | 0.00% | −130,799−70.6% | Reduced |
| Wells Fargo & Company | 51,049 | $1.26M | 0.00% | +5,079+11.0% | Added |
| Thrivent Financial for Lutherans | 49,543 | $1.23M | 0.00% | +49,543 | New |
| Algert Global LLC | 48,350 | $1.20M | 0.05% | −908−1.8% | Reduced |
| Profund Advisors LLC | 46,878 | $1.16M | 0.05% | +13,124+38.9% | Added |
| Alliancebernstein L.P. | 46,746 | $1.16M | 0.00% | 00.0% | Unchanged |
| RBF Capital, LLC | 45,362 | $1.12M | 0.06% | 00.0% | Unchanged |
| Guggenheim Capital LLC | 44,400 | $1.10M | 0.01% | +20,939+89.3% | Added |
| Mirae Asset Global Investments Co., Ltd. | 27,912 | $1.09M | 0.00% | +161+0.6% | Added |
| Voya Investment Management LLC | 43,674 | $1.08M | 0.00% | −2,588−5.6% | Reduced |
| Platinum Investment Management Ltd | 41,508 | $1.03M | 0.04% | 00.0% | Unchanged |
| Seven Eight Capital, LP | 41,120 | $1.02M | 0.11% | −15,826−27.8% | Reduced |
| Invesco Ltd. | 40,504 | $1.00M | 0.00% | +13,889+52.2% | Added |
| California State Teachers Retirement System | 40,442 | $1.00M | 0.00% | −2,268−5.3% | Reduced |
| Legal & General Group Plc | 38,875 | $962.9K | 0.00% | +478+1.2% | Added |
| Alps Advisors Inc | 37,889 | $938.5K | 0.01% | +1,359+3.7% | Added |
| Primecap Management Co | 36,500 | $904.1K | 0.00% | +36,500 | New |
| State of Wisconsin Investment Board | 33,159 | $821.3K | 0.00% | +402+1.2% | Added |
| Fred Alger Management, LLC | 32,996 | $817.3K | 0.00% | −728−2.2% | Reduced |
| New York State Common Retirement Fund | 32,350 | $801.3K | 0.00% | −1,298−3.9% | Reduced |
| BNP Paribas Arbitrage, SA | 32,253 | $798.9K | 0.00% | −60,751−65.3% | Reduced |
| Deutsche Bank AG | 31,897 | $790.1K | 0.00% | +9,696+43.7% | Added |
| Man Group plc | 29,679 | $735.1K | 0.00% | −2,725−8.4% | Reduced |
| Jump Financial, LLC | 27,951 | $692.3K | 0.02% | +21,494+332.9% | Added |
| Bank of Montreal | 24,880 | $622.2K | 0.00% | +24,880 | New |
| Edgewood Management LLC | 24,060 | $596.0K | 0.00% | 00.0% | Unchanged |
| State Board of Administration of Florida Retirement System | 11,286 | $547.0K | 0.00% | −630−5.3% | Reduced |
| MetLife Investment Management | 21,852 | $541.3K | 0.00% | 00.0% | Unchanged |
| American International Group, Inc. | 20,795 | $515.1K | 0.00% | −178−0.8% | Reduced |
| HighTower Advisors, LLC | 18,615 | $459.0K | 0.00% | −120−0.6% | Reduced |
| SG Americas Securities, LLC | 16,720 | $414.0K | 0.00% | −119,137−87.7% | Reduced |
| Ensign Peak Advisors, Inc | 16,593 | $411.0K | 0.00% | −64,241−79.5% | Reduced |
| HighMark Wealth Management LLC | 16,502 | $408.8K | 0.25% | +9,150+124.5% | Added |
| Schroder Investment Management Group | 15,771 | $390.6K | 0.00% | +318+2.1% | Added |
| New York Life Investment Management LLC | 14,407 | $356.9K | 0.00% | +14,407 | New |
| E Fund Management Co., Ltd. | 14,340 | $355.2K | 0.02% | +3,244+29.2% | Added |
| DekaBank Deutsche Girozentrale | 14,000 | $351.0K | 0.00% | 00.0% | Unchanged |
| Teachers Retirement System of the State of Kentucky | 14,039 | $348.0K | 0.00% | +2,895+26.0% | Added |
| Susquehanna Fundamental Investments, LLC | 13,818 | $342.3K | 0.02% | +13,818 | New |
| Axq Capital, LP | 13,416 | $332.3K | 0.08% | +6,396+91.1% | Added |
| Principal Financial Group Inc | 11,737 | $290.7K | 0.00% | −19,236−62.1% | Reduced |
| ProShare Advisors LLC | 11,346 | $281.0K | 0.00% | +932+8.9% | Added |
| Arizona State Retirement System | 11,061 | $274.0K | 0.00% | −164−1.5% | Reduced |
| GTS Securities LLC | 10,944 | $271.1K | 0.01% | +10,944 | New |
| China Universal Asset Management Co., Ltd. | 10,360 | $256.6K | 0.03% | +4,157+67.0% | Added |
| Brinker Capital Investments, LLC | 10,158 | $251.6K | 0.00% | +798+8.5% | Added |
| Orion Portfolio Solutions, LLC | 10,158 | $251.6K | 0.00% | +798+8.5% | Added |
| Focused Wealth Management, Inc | 10,129 | $250.9K | 0.04% | +10,000+7,751.9% | Added |