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, Q2 2021
Institutional positions in Prothena Corp Public Ltd Co as of Jun 30, 2021. 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
- 156
- +10 vs. Q1 2021
- Shares held
- 40.4M
- +429.9K (+1.1%) vs. Q1 2021
- Total value
- $2.08B
- +$1.07B (+106.8%) vs. Q1 2021
- New holders
- 34
- 50 more added
- Sold out
- 24
- 39 more reduced
Compare with Q1 2021: 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, Q2 2021
Shares, value and share of portfolio for each institution holding Prothena Corp Public Ltd Co; share changes are against Q1 2021.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| EcoR1 Capital, LLC | 11,284,280 | $580.1M | 21.77% | +250,000+2.3% | Added |
| Price T Rowe Associates Inc | 5,823,085 | $299.4M | 0.03% | +2,510,739+75.8% | Added |
| BlackRock Inc. | 3,681,848 | $189.3M | 0.01% | +90,840+2.5% | Added |
| FMR LLC | 2,778,287 | $142.8M | 0.01% | −337,909−10.8% | Reduced |
| First Light Asset Management, LLC | 1,927,829 | $99.1M | 5.95% | −1,007,878−34.3% | Reduced |
| Palo Alto Investors LP | 1,731,482 | $89.0M | 4.91% | −11,023−0.6% | Reduced |
| Dimensional Fund Advisors LP | 1,585,361 | $81.5M | 0.03% | +6,259+0.4% | Added |
| State Street Corp | 1,228,479 | $63.2M | 0.00% | +24,187+2.0% | Added |
| Redmile Group, LLC | 1,215,657 | $62.5M | 0.92% | −641,415−34.5% | Reduced |
| Rock Springs Capital Management LP | 950,091 | $48.8M | 0.97% | −206,809−17.9% | Reduced |
| Vanguard Group Inc | 681,096 | $35.0M | 0.00% | +109,420+19.1% | Added |
| Geode Capital Management, LLC | 563,356 | $29.0M | 0.00% | +71,775+14.6% | Added |
| Nuveen Asset Management, LLC | 449,991 | $23.1M | 0.01% | +77,164+20.7% | Added |
| Northern Trust Corp | 441,284 | $22.7M | 0.00% | +100,009+29.3% | Added |
| Two Sigma Advisers, LP | 422,300 | $21.7M | 0.06% | +75,500+21.8% | Added |
| Prosight Management, LP | 422,000 | $21.7M | 13.74% | −178,000−29.7% | Reduced |
| UBS Asset Management Americas Inc | 402,168 | $20.7M | 0.01% | +49,641+14.1% | Added |
| Two Sigma Investments, LP | 336,990 | $17.3M | 0.05% | +40,612+13.7% | Added |
| Invesco Ltd. | 295,859 | $15.2M | 0.00% | +67,574+29.6% | Added |
| Renaissance Technologies LLC | 238,300 | $12.3M | 0.02% | −50,700−17.5% | Reduced |
| Atika Capital Management LLC | 234,000 | $12.0M | 1.00% | +216,094+1,206.8% | Added |
| Charles Schwab Investment Management Inc | 206,826 | $10.6M | 0.00% | +20,435+11.0% | Added |
| Pinnacle Associates Ltd | 205,918 | $10.6M | 0.19% | −73,642−26.3% | Reduced |
| Adage Capital Partners GP, L.L.C. | 200,000 | $10.3M | 0.02% | +200,000 | New |
| Avidity Partners Management LP | 182,000 | $9.36M | 0.25% | +182,000 | New |
| Point72 Asset Management, L.P. | 168,800 | $8.68M | 0.04% | +168,800 | New |
| Bank of New York Mellon Corp | 135,455 | $6.96M | 0.00% | +5,455+4.2% | Added |
| TD Asset Management Inc | 122,769 | $6.15M | 0.01% | +43,881+55.6% | Added |
| EAM Investors, LLC | 104,550 | $5.38M | 0.83% | +42,893+69.6% | Added |
| Platinum Investment Management Ltd | 101,905 | $5.24M | 0.12% | −26,318−20.5% | Reduced |
| Perceptive Advisors LLC | 100,000 | $5.14M | 0.07% | +100,000 | New |
| Handelsbanken Fonder AB | 99,700 | $5.13M | 0.03% | +99,700 | New |
| Parametric Portfolio Associates LLC | 93,877 | $4.83M | 0.00% | +33,406+55.2% | Added |
| Millennium Management LLC | 87,944 | $4.52M | 0.01% | +64,988+283.1% | Added |
| AXA S.A. | 79,660 | $4.09M | 0.01% | −88,389−52.6% | Reduced |
| Voloridge Investment Management, LLC | 75,661 | $3.89M | 0.03% | +75,661 | New |
| Goldman Sachs Group Inc | 73,264 | $3.77M | 0.00% | −422,367−85.2% | Reduced |
| EAM Global Investors LLC | 70,255 | $3.61M | 1.00% | −16,605−19.1% | Reduced |
| DCF Advisers, LLC | 61,750 | $3.17M | 1.60% | +15,894+34.7% | Added |
| Swiss National Bank | 61,600 | $3.17M | 0.00% | +2,300+3.9% | Added |
| Alps Advisors Inc | 57,880 | $2.98M | 0.03% | −14,337−19.9% | Reduced |
| Prudential Financial Inc | 57,179 | $2.94M | 0.00% | −15,815−21.7% | Reduced |
| Royal Bank of Canada | 57,112 | $2.94M | 0.00% | +50,252+732.5% | Added |
| Citigroup Inc | 56,352 | $2.90M | 0.00% | +1,257+2.3% | Added |
| Hillsdale Investment Management Inc. | 51,800 | $2.66M | 0.21% | +51,800 | New |
| Alliancebernstein L.P. | 49,540 | $2.55M | 0.00% | +6,700+15.6% | Added |
| State of Wisconsin Investment Board | 49,000 | $2.52M | 0.01% | +7,500+18.1% | Added |
| California State Teachers Retirement System | 47,022 | $2.42M | 0.00% | +636+1.4% | Added |
| RBF Capital, LLC | 45,362 | $2.33M | 0.13% | 00.0% | Unchanged |
| Morgan Stanley | 44,940 | $2.31M | 0.00% | +30,665+214.8% | Added |
| Federated Hermes, Inc. | 43,671 | $2.25M | 0.00% | +43,671 | New |
| Massachusetts Financial Services Co | 43,268 | $2.22M | 0.00% | −30,071−41.0% | Reduced |
| Rhumbline Advisers | 42,439 | $2.18M | 0.00% | −16,586−28.1% | Reduced |
| Tudor Investment Corp Et Al | 40,059 | $2.06M | 0.04% | +40,059 | New |
| Los Angeles Capital Management LLC | 34,495 | $1.77M | 0.01% | −4,680−11.9% | Reduced |
| Rafferty Asset Management, LLC | 34,176 | $1.76M | 0.01% | −6,902−16.8% | Reduced |
| New York Life Investments Alternatives | 32,104 | $1.65M | 1.11% | −14,084−30.5% | Reduced |
| Principal Financial Group Inc | 31,529 | $1.62M | 0.00% | +4,484+16.6% | Added |
| Birchview Capital, LP | 30,247 | $1.55M | 0.93% | +30,247 | New |
| Susquehanna Fundamental Investments, LLC | 30,150 | $1.55M | 0.03% | +1,470+5.1% | Added |
| New York State Common Retirement Fund | 30,110 | $1.55M | 0.00% | +2,341+8.4% | Added |
| ClariVest Asset Management LLC | 28,733 | $1.48M | 0.05% | −90.0% | Reduced |
| Cubist Systematic Strategies, LLC | 27,530 | $1.42M | 0.02% | +10,309+59.9% | Added |
| Squarepoint Ops LLC | 25,886 | $1.33M | 0.01% | +11,650+81.8% | Added |
| Edgewood Management LLC | 25,000 | $1.28M | 0.00% | 00.0% | Unchanged |
| Wellington Management Group LLP | 23,821 | $1.22M | 0.00% | +3,232+15.7% | Added |
| Credit Suisse AG | 22,429 | $1.15M | 0.00% | +2,974+15.3% | Added |
| Deutsche Bank AG | 21,612 | $1.11M | 0.00% | +1,594+8.0% | Added |
| D. E. Shaw & Co., Inc. | 20,295 | $1.04M | 0.00% | −39,003−65.8% | Reduced |
| American International Group, Inc. | 19,107 | $982.0K | 0.00% | +1,175+6.6% | Added |
| Manufacturers Life Insurance Company, The | 18,654 | $959.0K | 0.00% | +1,429+8.3% | Added |
| Ensign Peak Advisors, Inc | 17,628 | $906.0K | 0.00% | 00.0% | Unchanged |
| ProShare Advisors LLC | 16,785 | $863.0K | 0.00% | +3,030+22.0% | Added |
| Bank of America Corp | 16,143 | $829.0K | 0.00% | −31,754−66.3% | Reduced |
| State Board of Administration of Florida Retirement System | 16,031 | $824.0K | 0.00% | +1,180+7.9% | Added |
| JPMorgan Chase & Co | 15,328 | $787.0K | 0.00% | +3,669+31.5% | Added |
| Wells Fargo & Company | 15,116 | $777.0K | 0.00% | −7,863−34.2% | Reduced |
| Voya Investment Management LLC | 13,485 | $693.0K | 0.00% | −352−2.5% | Reduced |
| Virginia Retirement Systems Et Al | 13,400 | $689.0K | 0.01% | −700−5.0% | Reduced |
| MetLife Investment Management | 12,610 | $648.3K | 0.01% | 00.0% | Unchanged |
| Susquehanna International Group, LLP | 12,395 | $637.0K | 0.00% | +3,288+36.1% | Added |
| DekaBank Deutsche Girozentrale | 12,350 | $586.0K | 0.00% | 00.0% | Unchanged |
| Virtu Financial LLC | 11,174 | $574.0K | 0.06% | +11,174 | New |
| Public Employees Retirement Association of Colorado | 10,984 | $565.0K | 0.00% | 00.0% | Unchanged |
| Engineers Gate Manager LP | 10,810 | $556.0K | 0.04% | +10,810 | New |
| SG Americas Securities, LLC | 10,020 | $515.0K | 0.00% | −520−4.9% | Reduced |
| Barclays PLC | 8,360 | $429.0K | 0.00% | −21,137−71.7% | Reduced |
| King Wealth | 8,000 | $411.0K | 0.08% | 00.0% | Unchanged |
| Legal & General Group Plc | 7,987 | $410.0K | 0.00% | +859+12.1% | Added |
| Old Well Partners, LLC | 7,924 | $407.0K | 0.18% | −2,267−22.2% | Reduced |
| Arizona State Retirement System | 7,592 | $390.0K | 0.00% | +7,592 | New |
| Trexquant Investment LP | 7,326 | $377.0K | 0.03% | +7,326 | New |
| Amalgamated Bank | 6,060 | $312.0K | 0.00% | +6,060 | New |
| Hunter Perkins Capital Management, LLC | 5,800 | $298.0K | 0.06% | +5,800 | New |
| Gotham Asset Management, LLC | 5,337 | $274.0K | 0.01% | +5,337 | New |
| State of Wyoming | 5,248 | $270.0K | 0.17% | +5,248 | New |
| Maven Securities LTD | 5,000 | $257.0K | 0.03% | +5,000 | New |
| AQR Capital Management LLC | 4,917 | $253.0K | 0.00% | +4,917 | New |
| Virtus ETF Advisers LLC | 4,694 | $241.0K | 0.10% | −18,904−80.1% | Reduced |
| Focused Wealth Management, Inc | 4,654 | $239.0K | 0.04% | −4,525−49.3% | Reduced |