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 2022
Institutional positions in Prothena Corp Public Ltd Co as of Dec 31, 2022. 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
- 201
- +21 vs. Q3 2022
- Shares held
- 49.4M
- +4.96M (+11.2%) vs. Q3 2022
- Total value
- $2.98B
- +$282.3M (+10.5%) vs. Q3 2022
- New holders
- 44
- 77 more added
- Sold out
- 23
- 51 more reduced
3 institutions that held it in Q3 2022 haven't filed for Q4 2022 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2022: 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 2022
Shares, value and share of portfolio for each institution holding Prothena Corp Public Ltd Co; share changes are against Q3 2022.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| EcoR1 Capital, LLC | 11,584,280 | $698.0M | 21.27% | 00.0% | Unchanged |
| FMR LLC | 3,947,272 | $237.8M | 0.02% | +784,854+24.8% | Added |
| BlackRock Inc. | 3,485,068 | $210.0M | 0.01% | +346,324+11.0% | Added |
| Price T Rowe Associates Inc | 3,205,903 | $193.2M | 0.03% | +223,962+7.5% | Added |
| Avidity Partners Management LP | 2,953,000 | $177.9M | 4.16% | +986,000+50.1% | Added |
| State Street Corp | 2,051,960 | $123.6M | 0.01% | +170,166+9.0% | Added |
| Wellington Management Group LLP | 1,764,893 | $106.3M | 0.02% | +1,333,384+309.0% | Added |
| Palo Alto Investors LP | 1,658,577 | $99.9M | 8.52% | +8,800+0.5% | Added |
| First Light Asset Management, LLC | 1,535,599 | $92.5M | 8.59% | −3,079−0.2% | Reduced |
| Janus Henderson Group PLC | 1,432,323 | $86.3M | 0.06% | +1,279,375+836.5% | Added |
| Dimensional Fund Advisors LP | 1,320,501 | $79.6M | 0.03% | −163,404−11.0% | Reduced |
| T. Rowe Price Investment Management, Inc. | 927,959 | $55.9M | 0.04% | +79,997+9.4% | Added |
| PFM Health Sciences, LP | 875,464 | $52.7M | 2.23% | +35,226+4.2% | Added |
| Vanguard Group Inc | 870,134 | $52.4M | 0.00% | +62,174+7.7% | Added |
| Rock Springs Capital Management LP | 753,462 | $45.4M | 1.09% | +75,000+11.1% | Added |
| Geode Capital Management, LLC | 715,601 | $43.1M | 0.01% | +79,877+12.6% | Added |
| Nuveen Asset Management, LLC | 572,790 | $34.5M | 0.01% | +82,338+16.8% | Added |
| Renaissance Technologies LLC | 474,900 | $28.6M | 0.04% | −162,000−25.4% | Reduced |
| Eventide Asset Management, LLC | 438,732 | $26.4M | 0.52% | +208,732+90.8% | Added |
| JPMorgan Chase & Co | 404,551 | $24.4M | 0.00% | +122,369+43.4% | Added |
| Maple Rock Capital Partners Inc. | 399,414 | $24.1M | 3.55% | 00.0% | Unchanged |
| Northern Trust Corp | 361,585 | $21.8M | 0.00% | +14,437+4.2% | Added |
| Prosight Management, LP | 330,000 | $19.9M | 11.12% | +8,907+2.8% | Added |
| Two Sigma Advisers, LP | 327,000 | $19.7M | 0.06% | −8,000−2.4% | Reduced |
| Finepoint Capital LP | 322,900 | $19.5M | 6.29% | +17,500+5.7% | Added |
| Point72 Asset Management, L.P. | 311,500 | $18.8M | 0.07% | +143,100+85.0% | Added |
| Charles Schwab Investment Management Inc | 300,850 | $18.1M | 0.01% | +15,108+5.3% | Added |
| Boxer Capital, LLC | 300,000 | $18.1M | 0.97% | 00.0% | Unchanged |
| Perceptive Advisors LLC | 237,646 | $14.3M | 0.41% | +7,646+3.3% | Added |
| UBS Asset Management Americas Inc | 228,368 | $13.8M | 0.01% | −14,642−6.0% | Reduced |
| Goldman Sachs Group Inc | 216,055 | $13.0M | 0.00% | −50,482−18.9% | Reduced |
| Millennium Management LLC | 213,610 | $12.9M | 0.01% | +84,173+65.0% | Added |
| Suvretta Capital Management, LLC | 206,448 | $12.4M | 0.52% | −110,083−34.8% | Reduced |
| Two Sigma Investments, LP | 203,435 | $12.3M | 0.04% | +67,750+49.9% | Added |
| Granahan Investment Management Inc | 199,926 | $12.0M | 0.37% | +58,818+41.7% | Added |
| Morgan Stanley | 180,403 | $10.9M | 0.00% | +13,904+8.4% | Added |
| Rafferty Asset Management, LLC | 138,353 | $8.34M | 0.07% | +31,687+29.7% | Added |
| Pinnacle Associates Ltd | 137,571 | $8.29M | 0.18% | −2,525−1.8% | Reduced |
| Bank of New York Mellon Corp | 136,997 | $8.25M | 0.00% | −3,195−2.3% | Reduced |
| Frazier Life Sciences Management, L.P. | 127,900 | $7.71M | 0.48% | +127,900 | New |
| Birchview Capital, LP | 127,195 | $7.66M | 5.41% | +8,250+6.9% | Added |
| Ensign Peak Advisors, Inc | 125,422 | $7.56M | 0.02% | +63,665+103.1% | Added |
| Woodline Partners LP | 123,623 | $7.45M | 0.10% | +123,623 | New |
| Bank of America Corp | 121,671 | $7.33M | 0.00% | +38,574+46.4% | Added |
| Sectoral Asset Management Inc | 115,200 | $6.94M | 1.34% | +115,200 | New |
| Atika Capital Management LLC | 91,178 | $5.49M | 0.84% | +91,178 | New |
| UBS Group AG | 91,069 | $5.49M | 0.00% | +84,920+1,381.0% | Added |
| TD Asset Management Inc | 81,513 | $4.91M | 0.01% | +12,974+18.9% | Added |
| Barclays PLC | 79,339 | $4.78M | 0.00% | +11,277+16.6% | Added |
| Swiss National Bank | 79,300 | $4.78M | 0.00% | +2,100+2.7% | Added |
| SG Americas Securities, LLC | 78,772 | $4.75M | 0.07% | −56,816−41.9% | Reduced |
| Hillsdale Investment Management Inc. | 77,500 | $4.67M | 0.39% | +77,500 | New |
| EAM Global Investors LLC | 76,653 | $4.62M | 1.19% | 00.0% | Unchanged |
| Paradigm Biocapital Advisors LP | 75,000 | $4.52M | 0.53% | −160,826−68.2% | Reduced |
| DCF Advisers, LLC | 74,100 | $4.46M | 3.45% | +6,100+9.0% | Added |
| Silverarc Capital Management, LLC | 71,706 | $4.32M | 1.49% | −38,294−34.8% | Reduced |
| Putnam Investments LLC | 65,394 | $3.94M | 0.01% | +50,638+343.2% | Added |
| Pura Vida Investments, LLC | 64,000 | $3.86M | 0.65% | +64,000 | New |
| Citigroup Inc | 63,400 | $3.82M | 0.01% | −34,744−35.4% | Reduced |
| First Trust Advisors LP | 62,396 | $3.76M | 0.00% | +23,588+60.8% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 60,432 | $3.64M | 0.02% | +32,876+119.3% | Added |
| Norges Bank | 59,259 | $3.57M | 0.00% | +23,859+67.4% | Added |
| Principal Financial Group Inc | 56,007 | $3.37M | 0.00% | +36,992+194.5% | Added |
| Manufacturers Life Insurance Company, The | 55,062 | $3.29M | 0.00% | +2,031+3.8% | Added |
| RBF Capital, LLC | 54,362 | $3.27M | 0.25% | 00.0% | Unchanged |
| EAM Investors, LLC | 53,346 | $3.21M | 0.67% | −291−0.5% | Reduced |
| Handelsbanken Fonder AB | 52,000 | $3.13M | 0.02% | −33,700−39.3% | Reduced |
| Rhumbline Advisers | 49,718 | $3.00M | 0.00% | +2,827+6.0% | Added |
| Jennison Associates LLC | 49,241 | $2.97M | 0.00% | +49,241 | New |
| Alliancebernstein L.P. | 44,866 | $2.70M | 0.00% | −500−1.1% | Reduced |
| California State Teachers Retirement System | 43,220 | $2.60M | 0.00% | +1,017+2.4% | Added |
| Invesco Ltd. | 42,304 | $2.55M | 0.00% | +24,822+142.0% | Added |
| Platinum Investment Management Ltd | 41,508 | $2.50M | 0.10% | −7,406−15.1% | Reduced |
| Cubist Systematic Strategies, LLC | 40,719 | $2.45M | 0.02% | +22,999+129.8% | Added |
| Moody Aldrich Partners LLC | 39,237 | $2.36M | 0.48% | +39,237 | New |
| Credit Suisse AG | 38,887 | $2.34M | 0.00% | +7,609+24.3% | Added |
| Voya Investment Management LLC | 38,000 | $2.29M | 0.00% | +10,610+38.7% | Added |
| State of New Jersey Common Pension Fund D | 37,600 | $2.27M | 0.01% | +37,600 | New |
| New York State Common Retirement Fund | 35,780 | $2.16M | 0.00% | −611−1.7% | Reduced |
| Monarch Partners Asset Management LLC | 35,645 | $2.15M | 0.63% | +2,285+6.8% | Added |
| State of Wisconsin Investment Board | 32,995 | $1.99M | 0.01% | −16,315−33.1% | Reduced |
| Alps Advisors Inc | 32,776 | $1.97M | 0.02% | +7,186+28.1% | Added |
| Trexquant Investment LP | 31,237 | $1.88M | 0.05% | +31,237 | New |
| Capital Fund Management S.A. | 29,772 | $1.79M | 0.04% | +29,772 | New |
| Macquarie Group Ltd | 28,569 | $1.72M | 0.00% | +27,702+3,195.2% | Added |
| Schonfeld Strategic Advisors LLC | 28,128 | $1.69M | 0.01% | −16,662−37.2% | Reduced |
| Mariner, LLC | 26,927 | $1.62M | 0.01% | +9,898+58.1% | Added |
| D. E. Shaw & Co., Inc. | 26,856 | $1.62M | 0.00% | −78,374−74.5% | Reduced |
| BNP Paribas Arbitrage, SA | 25,411 | $1.53M | 0.00% | −12,996−33.8% | Reduced |
| Thornburg Investment Management Inc | 24,274 | $1.46M | 0.02% | +24,274 | New |
| Ameriprise Financial Inc | 24,180 | $1.46M | 0.00% | −10,153−29.6% | Reduced |
| Edgewood Management LLC | 24,060 | $1.45M | 0.01% | −940−3.8% | Reduced |
| Man Group plc | 23,697 | $1.43M | 0.01% | −27,019−53.3% | Reduced |
| Deutsche Bank AG | 21,898 | $1.32M | 0.00% | +5,619+34.5% | Added |
| AXA S.A. | 19,852 | $1.20M | 0.00% | −32,373−62.0% | Reduced |
| MetLife Investment Management | 19,561 | $1.18M | 0.01% | 00.0% | Unchanged |
| Algert Global LLC | 19,203 | $1.16M | 0.06% | +10,533+121.5% | Added |
| Prudential Financial Inc | 18,947 | $1.14M | 0.00% | −20,932−52.5% | Reduced |
| American International Group, Inc. | 17,344 | $1.04M | 0.01% | +502+3.0% | Added |
| Legal & General Group Plc | 17,034 | $1.03M | 0.00% | +102+0.6% | Added |