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, Q3 2022
Institutional positions in Prothena Corp Public Ltd Co as of Sep 30, 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
- 183
- +19 vs. Q2 2022
- Shares held
- 44.4M
- −101.3K (−0.2%) vs. Q2 2022
- Total value
- $2.69B
- +$1.48B (+122.5%) vs. Q2 2022
- New holders
- 39
- 51 more added
- Sold out
- 20
- 53 more reduced
3 institutions that held it in Q2 2022 haven't filed for Q3 2022 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 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, Q3 2022
Shares, value and share of portfolio for each institution holding Prothena Corp Public Ltd Co; share changes are against Q2 2022.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| EcoR1 Capital, LLC | 11,584,280 | $702.4M | 20.76% | 00.0% | Unchanged |
| FMR LLC | 3,162,418 | $191.7M | 0.02% | +237,020+8.1% | Added |
| BlackRock Inc. | 3,138,744 | $190.3M | 0.01% | −332,556−9.6% | Reduced |
| Price T Rowe Associates Inc | 2,981,941 | $180.8M | 0.03% | −2,983,847−50.0% | Reduced |
| Avidity Partners Management LP | 1,967,000 | $119.3M | 2.59% | +1,967,000 | New |
| State Street Corp | 1,881,794 | $114.1M | 0.01% | −364,279−16.2% | Reduced |
| Palo Alto Investors LP | 1,649,777 | $100.0M | 7.91% | −31,700−1.9% | Reduced |
| First Light Asset Management, LLC | 1,538,678 | $93.3M | 9.44% | −399,505−20.6% | Reduced |
| Dimensional Fund Advisors LP | 1,483,905 | $90.0M | 0.03% | −82,848−5.3% | Reduced |
| T. Rowe Price Investment Management, Inc. | 847,962 | $51.4M | 0.04% | +847,962 | New |
| PFM Health Sciences, LP | 840,238 | $50.9M | 1.95% | +495,124+143.5% | Added |
| Vanguard Group Inc | 807,960 | $49.0M | 0.00% | −21,116−2.5% | Reduced |
| Rock Springs Capital Management LP | 678,462 | $41.1M | 1.06% | 00.0% | Unchanged |
| Renaissance Technologies LLC | 636,900 | $38.6M | 0.05% | −49,100−7.2% | Reduced |
| Geode Capital Management, LLC | 635,724 | $38.5M | 0.01% | +4,044+0.6% | Added |
| Redmile Group, LLC | 525,575 | $31.9M | 1.24% | −210,600−28.6% | Reduced |
| Nuveen Asset Management, LLC | 490,452 | $29.7M | 0.01% | −232,720−32.2% | Reduced |
| Wellington Management Group LLP | 431,509 | $26.2M | 0.01% | +338,055+361.7% | Added |
| Maple Rock Capital Partners Inc. | 399,414 | $24.2M | 2.24% | +65,414+19.6% | Added |
| Federated Hermes, Inc. | 350,137 | $21.2M | 0.06% | +345,634+7,675.6% | Added |
| Northern Trust Corp | 347,148 | $21.0M | 0.00% | −5,073−1.4% | Reduced |
| Two Sigma Advisers, LP | 335,000 | $20.3M | 0.06% | −112,700−25.2% | Reduced |
| Prosight Management, LP | 321,093 | $19.5M | 10.70% | −228,907−41.6% | Reduced |
| Suvretta Capital Management, LLC | 316,531 | $19.2M | 0.81% | +316,531 | New |
| Finepoint Capital LP | 305,400 | $18.5M | 6.09% | −152,100−33.2% | Reduced |
| Boxer Capital, LLC | 300,000 | $18.2M | 1.02% | 00.0% | Unchanged |
| Charles Schwab Investment Management Inc | 285,742 | $17.3M | 0.01% | +8,267+3.0% | Added |
| JPMorgan Chase & Co | 282,182 | $17.1M | 0.00% | −4,397−1.5% | Reduced |
| Goldman Sachs Group Inc | 266,537 | $16.2M | 0.00% | −3,647−1.3% | Reduced |
| UBS Asset Management Americas Inc | 243,010 | $14.7M | 0.01% | 00.0% | Unchanged |
| Paradigm Biocapital Advisors LP | 235,826 | $14.3M | 2.01% | +235,826 | New |
| Perceptive Advisors LLC | 230,000 | $13.9M | 0.41% | +230,000 | New |
| Eventide Asset Management, LLC | 230,000 | $13.9M | 0.27% | +230,000 | New |
| Citadel Advisors LLC | 188,643 | $11.4M | 0.01% | +33,132+21.3% | Added |
| Sessa Capital IM, L.P. | 187,000 | $11.3M | 0.81% | 00.0% | Unchanged |
| Point72 Asset Management, L.P. | 168,400 | $10.2M | 0.04% | +68,500+68.6% | Added |
| Morgan Stanley | 166,499 | $10.1M | 0.00% | −186,083−52.8% | Reduced |
| Janus Henderson Group PLC | 152,948 | $9.28M | 0.01% | −30,092−16.4% | Reduced |
| Granahan Investment Management Inc | 141,108 | $8.55M | 0.28% | −18,217−11.4% | Reduced |
| Bank of New York Mellon Corp | 140,192 | $8.50M | 0.00% | +20,828+17.4% | Added |
| Pinnacle Associates Ltd | 140,096 | $8.49M | 0.19% | −4,330−3.0% | Reduced |
| Two Sigma Investments, LP | 135,685 | $8.23M | 0.03% | −94,742−41.1% | Reduced |
| SG Americas Securities, LLC | 135,588 | $8.22M | 0.13% | −19,000−12.3% | Reduced |
| Millennium Management LLC | 129,437 | $7.85M | 0.01% | −75,233−36.8% | Reduced |
| Birchview Capital, LP | 118,945 | $7.21M | 5.08% | +16,397+16.0% | Added |
| Silverarc Capital Management, LLC | 110,000 | $6.67M | 2.83% | +110,000 | New |
| Marshall Wace, LLP | 107,803 | $6.54M | 0.02% | −70,584−39.6% | Reduced |
| Rafferty Asset Management, LLC | 106,666 | $6.47M | 0.07% | +25,194+30.9% | Added |
| D. E. Shaw & Co., Inc. | 105,230 | $6.38M | 0.01% | +44,034+72.0% | Added |
| Susquehanna International Group, LLP | 98,706 | $5.98M | 0.01% | +66,725+208.6% | Added |
| Citigroup Inc | 98,144 | $5.95M | 0.01% | +12,762+14.9% | Added |
| Handelsbanken Fonder AB | 85,700 | $5.20M | 0.03% | −41,800−32.8% | Reduced |
| Bank of America Corp | 83,097 | $5.04M | 0.00% | +17,753+27.2% | Added |
| Swiss National Bank | 77,200 | $4.68M | 0.00% | 00.0% | Unchanged |
| EAM Global Investors LLC | 76,653 | $4.65M | 1.24% | +76,653 | New |
| Guggenheim Capital LLC | 75,795 | $4.59M | 0.04% | −421−0.6% | Reduced |
| Barclays PLC | 68,062 | $4.13M | 0.00% | +66,281+3,721.6% | Added |
| DCF Advisers, LLC | 68,000 | $4.12M | 3.04% | +144+0.2% | Added |
| TD Asset Management Inc | 68,539 | $4.08M | 0.01% | −43,102−38.6% | Reduced |
| Ensign Peak Advisors, Inc | 61,757 | $3.75M | 0.01% | +11,880+23.8% | Added |
| RBF Capital, LLC | 54,362 | $3.30M | 0.28% | +9,000+19.8% | Added |
| EAM Investors, LLC | 53,637 | $3.25M | 0.71% | +53,637 | New |
| Manufacturers Life Insurance Company, The | 53,031 | $3.17M | 0.00% | −305−0.6% | Reduced |
| AXA S.A. | 52,225 | $3.17M | 0.01% | +25,900+98.4% | Added |
| Man Group plc | 50,716 | $3.08M | 0.01% | – | – |
| State of Wisconsin Investment Board | 49,310 | $2.99M | 0.01% | +14,227+40.6% | Added |
| Platinum Investment Management Ltd | 48,914 | $2.97M | 0.12% | −11,598−19.2% | Reduced |
| Walleye Trading LLC | 48,295 | $2.93M | 0.10% | +48,295 | New |
| Rhumbline Advisers | 46,891 | $2.84M | 0.00% | +3,586+8.3% | Added |
| Alliancebernstein L.P. | 45,366 | $2.75M | 0.00% | 00.0% | Unchanged |
| Schonfeld Strategic Advisors LLC | 44,790 | $2.72M | 0.02% | +44,790 | New |
| California State Teachers Retirement System | 42,203 | $2.56M | 0.00% | −968−2.2% | Reduced |
| Prudential Financial Inc | 39,879 | $2.42M | 0.00% | −100.0% | Reduced |
| Occudo Quantitative Strategies LP | 38,889 | $2.36M | 0.18% | +38,889 | New |
| First Trust Advisors LP | 38,808 | $2.35M | 0.00% | −4,907−11.2% | Reduced |
| BNP Paribas Arbitrage, SA | 38,407 | $2.33M | 0.01% | +30,108+362.8% | Added |
| New York State Common Retirement Fund | 36,391 | $2.21M | 0.00% | +1,666+4.8% | Added |
| Norges Bank | 35,400 | $2.15M | 0.00% | −41,400−53.9% | Reduced |
| Ameriprise Financial Inc | 34,333 | $2.08M | 0.00% | +9,124+36.2% | Added |
| Monarch Partners Asset Management LLC | 33,360 | $2.02M | 0.61% | +33,360 | New |
| Credit Suisse AG | 31,278 | $1.90M | 0.00% | +3,554+12.8% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 27,556 | $1.67M | 0.01% | +11,526+71.9% | Added |
| Voya Investment Management LLC | 27,390 | $1.66M | 0.00% | +13,595+98.6% | Added |
| Alps Advisors Inc | 25,590 | $1.55M | 0.01% | −2,180−7.9% | Reduced |
| Edgewood Management LLC | 25,000 | $1.52M | 0.01% | 00.0% | Unchanged |
| Simplex Trading, LLC | 23,666 | $1.43M | 0.06% | +20,435+632.5% | Added |
| New York Life Investments Alternatives | 22,566 | $1.37M | 1.37% | −18,526−45.1% | Reduced |
| STRS Ohio | 19,600 | $1.19M | 0.01% | 00.0% | Unchanged |
| MetLife Investment Management | 19,561 | $1.19M | 0.01% | 00.0% | Unchanged |
| Principal Financial Group Inc | 19,015 | $1.15M | 0.00% | −14,921−44.0% | Reduced |
| Cubist Systematic Strategies, LLC | 17,720 | $1.07M | 0.01% | +5,140+40.9% | Added |
| Invesco Ltd. | 17,482 | $1.06M | 0.00% | −225,871−92.8% | Reduced |
| Mariner, LLC | 17,029 | $1.03M | 0.00% | +1,939+12.8% | Added |
| Legal & General Group Plc | 16,932 | $1.03M | 0.00% | +863+5.4% | Added |
| American International Group, Inc. | 16,842 | $1.02M | 0.01% | +238+1.4% | Added |
| Mirae Asset Global Investments Co., Ltd. | 16,651 | $1.01M | 0.00% | +5,761+52.9% | Added |
| Deutsche Bank AG | 16,279 | $987.0K | 0.00% | −3,594−18.1% | Reduced |
| State Board of Administration of Florida Retirement System | 16,066 | $974.0K | 0.00% | 00.0% | Unchanged |
| Hussman Strategic Advisors, Inc. | 15,600 | $946.0K | 0.16% | −15,600−50.0% | Reduced |
| NinePointTwo Capital | 15,290 | $927.0K | 0.37% | +871+6.0% | Added |