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, Q4 2023
Institutional positions in Prothena Corp Public Ltd Co as of Dec 31, 2023. 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
- 187
- +2 vs. Q3 2023
- Shares held
- 53.6M
- +627.6K (+1.2%) vs. Q3 2023
- Total value
- $1.95B
- −$606.9M (−23.8%) vs. Q3 2023
- New holders
- 40
- 68 more added
- Sold out
- 38
- 46 more reduced
2 institutions that held it in Q3 2023 haven't filed for Q4 2023 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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, Q4 2023
Shares, value and share of portfolio for each institution holding Prothena Corp Public Ltd Co; share changes are against Q3 2023.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| EcoR1 Capital, LLC | 11,584,280 | $421.0M | 10.94% | 00.0% | Unchanged |
| FMR LLC | 8,049,796 | $292.5M | 0.02% | +19,506+0.2% | Added |
| Price T Rowe Associates Inc | 4,237,351 | $154.0M | 0.02% | +417,338+10.9% | Added |
| BlackRock Inc. | 3,770,650 | $137.0M | 0.00% | +229,406+6.5% | Added |
| State Street Corp | 2,758,564 | $100.2M | 0.00% | +648,331+30.7% | Added |
| Wellington Management Group LLP | 2,594,102 | $94.3M | 0.02% | +452,455+21.1% | Added |
| Janus Henderson Group PLC | 2,035,984 | $74.0M | 0.04% | +209,375+11.5% | Added |
| Palo Alto Investors LP | 1,660,057 | $60.3M | 5.44% | +2,599+0.2% | Added |
| First Light Asset Management, LLC | 1,088,801 | $39.6M | 3.18% | −405,238−27.1% | Reduced |
| Vanguard Group Inc | 1,070,555 | $38.9M | 0.00% | +39,781+3.9% | Added |
| Geode Capital Management, LLC | 905,125 | $32.9M | 0.00% | +46,065+5.4% | Added |
| Dimensional Fund Advisors LP | 867,635 | $31.5M | 0.01% | −235,227−21.3% | Reduced |
| Boxer Capital, LLC | 665,000 | $24.2M | 1.20% | +40,000+6.4% | Added |
| Rock Springs Capital Management LP | 625,048 | $22.7M | 0.56% | +10,750+1.7% | Added |
| Artal Group S.A. | 501,360 | $18.2M | 0.62% | +501,360 | New |
| Morgan Stanley | 482,260 | $17.5M | 0.00% | +213,400+79.4% | Added |
| Eventide Asset Management, LLC | 445,155 | $16.2M | 0.26% | 00.0% | Unchanged |
| Bank of New York Mellon Corp | 442,309 | $16.1M | 0.00% | −57,073−11.4% | Reduced |
| Granahan Investment Management Inc | 417,157 | $15.2M | 0.50% | +69,092+19.9% | Added |
| Northern Trust Corp | 404,110 | $14.7M | 0.00% | −5,737−1.4% | Reduced |
| Maple Rock Capital Partners Inc. | 373,584 | $13.6M | 1.06% | +139,000+59.3% | Added |
| JPMorgan Chase & Co | 358,478 | $13.0M | 0.00% | −43,553−10.8% | Reduced |
| Finepoint Capital LP | 349,300 | $12.7M | 4.39% | 00.0% | Unchanged |
| Renaissance Technologies LLC | 335,800 | $12.2M | 0.02% | +75,200+28.9% | Added |
| Goldman Sachs Group Inc | 333,786 | $12.1M | 0.00% | +83,463+33.3% | Added |
| Charles Schwab Investment Management Inc | 313,230 | $11.4M | 0.00% | +4,693+1.5% | Added |
| Nuveen Asset Management, LLC | 300,819 | $10.9M | 0.00% | −136,451−31.2% | Reduced |
| UBS Asset Management Americas Inc | 291,867 | $10.6M | 0.00% | +25,820+9.7% | Added |
| Bank of America Corp | 287,355 | $10.4M | 0.00% | +177,932+162.6% | Added |
| Armistice Capital, LLC | 278,000 | $10.1M | 0.27% | +278,000 | New |
| Prosight Management, LP | 229,539 | $8.34M | 3.35% | +103,337+81.9% | Added |
| Rafferty Asset Management, LLC | 207,419 | $7.54M | 0.03% | +50,579+32.2% | Added |
| Qube Research & Technologies Ltd | 203,682 | $7.40M | 0.02% | +119,029+140.6% | Added |
| PFM Health Sciences, LP | 189,744 | $6.90M | 0.41% | −646,827−77.3% | Reduced |
| Jane Street Group, LLC | 185,195 | $6.73M | 0.01% | +178,939+2,860.3% | Added |
| Amundi | 166,631 | $6.60M | 0.00% | −9,941−5.6% | Reduced |
| Mariner, LLC | 178,424 | $6.48M | 0.02% | +10,492+6.2% | Added |
| Birchview Capital, LP | 169,574 | $6.16M | 4.82% | 00.0% | Unchanged |
| Connor, Clark & Lunn Investment Management Ltd. | 155,942 | $5.67M | 0.03% | +28,167+22.0% | Added |
| Systematic Financial Management LP | 149,759 | $5.44M | 0.16% | +149,759 | New |
| Two Sigma Advisers, LP | 146,800 | $5.33M | 0.01% | −57,000−28.0% | Reduced |
| TD Asset Management Inc | 146,538 | $5.33M | 0.01% | −26,144−15.1% | Reduced |
| Barclays PLC | 142,607 | $5.18M | 0.00% | +56,572+65.8% | Added |
| Citadel Advisors LLC | 138,587 | $5.04M | 0.01% | −10,348−6.9% | Reduced |
| SG Americas Securities, LLC | 135,857 | $4.94M | 0.05% | +43,363+46.9% | Added |
| UBS Group AG | 132,497 | $4.81M | 0.00% | +87,245+192.8% | Added |
| Pinnacle Associates Ltd | 125,747 | $4.57M | 0.08% | +741+0.6% | Added |
| AXA S.A. | 120,617 | $4.38M | 0.01% | +7,704+6.8% | Added |
| Norges Bank | 104,564 | $3.80M | 0.00% | 00.0% | Unchanged |
| BNP Paribas Arbitrage, SA | 93,004 | $3.38M | 0.01% | −12,212−11.6% | Reduced |
| Citigroup Inc | 87,581 | $3.18M | 0.00% | +19,651+28.9% | Added |
| Manufacturers Life Insurance Company, The | 85,622 | $3.11M | 0.00% | +3,591+4.4% | Added |
| DCF Advisers, LLC | 84,000 | $3.05M | 2.07% | +1,050+1.3% | Added |
| Ensign Peak Advisors, Inc | 80,834 | $2.94M | 0.01% | −45,388−36.0% | Reduced |
| Swiss National Bank | 79,200 | $2.88M | 0.00% | −7,800−9.0% | Reduced |
| Squarepoint Ops LLC | 74,030 | $2.69M | 0.01% | +41,691+128.9% | Added |
| Trexquant Investment LP | 67,683 | $2.46M | 0.06% | +10,840+19.1% | Added |
| Putnam Investments LLC | 66,516 | $2.42M | 0.00% | +9,903+17.5% | Added |
| Rhumbline Advisers | 61,920 | $2.25M | 0.00% | −531−0.9% | Reduced |
| Handelsbanken Fonder AB | 61,400 | $2.23M | 0.01% | +2,500+4.2% | Added |
| Credit Suisse AG | 59,304 | $2.16M | 0.00% | +7,553+14.6% | Added |
| Twinbeech Capital LP | 58,096 | $2.11M | 0.03% | +39,720+216.2% | Added |
| Seven Eight Capital, LP | 56,946 | $2.07M | 0.24% | +56,946 | New |
| Pier Capital, LLC | 56,829 | $2.07M | 0.30% | −627−1.1% | Reduced |
| Edgestream Partners, L.P. | 50,522 | $1.84M | 0.13% | +50,522 | New |
| Algert Global LLC | 49,258 | $1.79M | 0.07% | +21,258+75.9% | Added |
| Sectoral Asset Management Inc | 46,777 | $1.70M | 0.73% | −125,630−72.9% | Reduced |
| Alliancebernstein L.P. | 46,746 | $1.70M | 0.00% | +1,000+2.2% | Added |
| Voya Investment Management LLC | 46,262 | $1.68M | 0.00% | −46,584−50.2% | Reduced |
| Wells Fargo & Company | 45,970 | $1.67M | 0.00% | −10,488−18.6% | Reduced |
| Caption Management, LLC | 45,892 | $1.67M | 0.18% | +45,892 | New |
| RBF Capital, LLC | 45,362 | $1.65M | 0.10% | −9,000−16.6% | Reduced |
| California State Teachers Retirement System | 42,710 | $1.55M | 0.00% | −1,422−3.2% | Reduced |
| Platinum Investment Management Ltd | 41,508 | $1.51M | 0.06% | 00.0% | Unchanged |
| Legal & General Group Plc | 38,397 | $1.40M | 0.00% | −105−0.3% | Reduced |
| Millennium Management LLC | 37,656 | $1.37M | 0.00% | −227,869−85.8% | Reduced |
| Alps Advisors Inc | 36,530 | $1.33M | 0.01% | −2,994−7.6% | Reduced |
| Engineers Gate Manager LP | 36,523 | $1.33M | 0.04% | +25,139+220.8% | Added |
| Exome Asset Management LLC | 36,384 | $1.32M | 1.31% | +36,384 | New |
| Gsa Capital Partners LLP | 34,850 | $1.27M | 0.11% | +34,850 | New |
| Profund Advisors LLC | 33,754 | $1.23M | 0.05% | +7,120+26.7% | Added |
| Fred Alger Management, LLC | 33,724 | $1.23M | 0.01% | +33,724 | New |
| New York State Common Retirement Fund | 33,648 | $1.22M | 0.00% | +2,675+8.6% | Added |
| Susquehanna International Group, LLP | 33,597 | $1.22M | 0.00% | −8,008−19.2% | Reduced |
| State of Wisconsin Investment Board | 32,757 | $1.19M | 0.00% | −12,015−26.8% | Reduced |
| Man Group plc | 32,404 | $1.18M | 0.00% | – | – |
| Principal Financial Group Inc | 30,973 | $1.13M | 0.00% | +5,391+21.1% | Added |
| Tudor Investment Corp Et Al | 28,561 | $1.04M | 0.01% | +28,561 | New |
| Mirae Asset Global Investments Co., Ltd. | 27,751 | $1.01M | 0.00% | +2,099+8.2% | Added |
| Group One Trading, L.P. | 27,456 | $997.8K | 0.03% | +27,456 | New |
| Invesco Ltd. | 26,615 | $967.2K | 0.00% | −4,102−13.4% | Reduced |
| Dynamic Technology Lab Private Ltd | 26,476 | $962.0K | 0.10% | +26,476 | New |
| Thornburg Investment Management Inc | 25,591 | $930.0K | 0.01% | −2,680−9.5% | Reduced |
| Capula Management Ltd | 24,310 | $883.4K | 0.06% | +24,310 | New |
| Edgewood Management LLC | 24,060 | $874.3K | 0.00% | 00.0% | Unchanged |
| Guggenheim Capital LLC | 23,461 | $852.6K | 0.01% | +8,118+52.9% | Added |
| HAP Trading, LLC | 22,701 | $825.0K | 0.24% | +22,701 | New |
| Deutsche Bank AG | 22,201 | $806.8K | 0.00% | −412−1.8% | Reduced |
| MetLife Investment Management | 21,852 | $794.1K | 0.01% | 00.0% | Unchanged |
| American International Group, Inc. | 20,973 | $762.2K | 0.00% | +283+1.4% | Added |