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 |
|---|---|---|---|---|---|
| Los Angeles Capital Management LLC | 34,495 | $1.77M | 0.01% | −4,680−11.9% | Reduced |
| Tudor Investment Corp Et Al | 40,059 | $2.06M | 0.04% | +40,059 | New |
| Rhumbline Advisers | 42,439 | $2.18M | 0.00% | −16,586−28.1% | Reduced |
| Massachusetts Financial Services Co | 43,268 | $2.22M | 0.00% | −30,071−41.0% | Reduced |
| Federated Hermes, Inc. | 43,671 | $2.25M | 0.00% | +43,671 | New |
| Morgan Stanley | 44,940 | $2.31M | 0.00% | +30,665+214.8% | Added |
| RBF Capital, LLC | 45,362 | $2.33M | 0.13% | 00.0% | Unchanged |
| California State Teachers Retirement System | 47,022 | $2.42M | 0.00% | +636+1.4% | Added |
| State of Wisconsin Investment Board | 49,000 | $2.52M | 0.01% | +7,500+18.1% | Added |
| Alliancebernstein L.P. | 49,540 | $2.55M | 0.00% | +6,700+15.6% | Added |
| Hillsdale Investment Management Inc. | 51,800 | $2.66M | 0.21% | +51,800 | New |
| Citigroup Inc | 56,352 | $2.90M | 0.00% | +1,257+2.3% | Added |
| Royal Bank of Canada | 57,112 | $2.94M | 0.00% | +50,252+732.5% | Added |
| Prudential Financial Inc | 57,179 | $2.94M | 0.00% | −15,815−21.7% | Reduced |
| Alps Advisors Inc | 57,880 | $2.98M | 0.03% | −14,337−19.9% | Reduced |
| Swiss National Bank | 61,600 | $3.17M | 0.00% | +2,300+3.9% | Added |
| DCF Advisers, LLC | 61,750 | $3.17M | 1.60% | +15,894+34.7% | Added |
| EAM Global Investors LLC | 70,255 | $3.61M | 1.00% | −16,605−19.1% | Reduced |
| Goldman Sachs Group Inc | 73,264 | $3.77M | 0.00% | −422,367−85.2% | Reduced |
| Voloridge Investment Management, LLC | 75,661 | $3.89M | 0.03% | +75,661 | New |
| AXA S.A. | 79,660 | $4.09M | 0.01% | −88,389−52.6% | Reduced |
| Millennium Management LLC | 87,944 | $4.52M | 0.01% | +64,988+283.1% | Added |
| Parametric Portfolio Associates LLC | 93,877 | $4.83M | 0.00% | +33,406+55.2% | Added |
| Handelsbanken Fonder AB | 99,700 | $5.13M | 0.03% | +99,700 | New |
| Perceptive Advisors LLC | 100,000 | $5.14M | 0.07% | +100,000 | New |
| Platinum Investment Management Ltd | 101,905 | $5.24M | 0.12% | −26,318−20.5% | Reduced |
| EAM Investors, LLC | 104,550 | $5.38M | 0.83% | +42,893+69.6% | Added |
| TD Asset Management Inc | 122,769 | $6.15M | 0.01% | +43,881+55.6% | Added |
| Bank of New York Mellon Corp | 135,455 | $6.96M | 0.00% | +5,455+4.2% | Added |
| Point72 Asset Management, L.P. | 168,800 | $8.68M | 0.04% | +168,800 | New |
| Avidity Partners Management LP | 182,000 | $9.36M | 0.25% | +182,000 | New |
| Adage Capital Partners GP, L.L.C. | 200,000 | $10.3M | 0.02% | +200,000 | New |
| Pinnacle Associates Ltd | 205,918 | $10.6M | 0.19% | −73,642−26.3% | Reduced |
| Charles Schwab Investment Management Inc | 206,826 | $10.6M | 0.00% | +20,435+11.0% | Added |
| Atika Capital Management LLC | 234,000 | $12.0M | 1.00% | +216,094+1,206.8% | Added |
| Renaissance Technologies LLC | 238,300 | $12.3M | 0.02% | −50,700−17.5% | Reduced |
| Invesco Ltd. | 295,859 | $15.2M | 0.00% | +67,574+29.6% | Added |
| Two Sigma Investments, LP | 336,990 | $17.3M | 0.05% | +40,612+13.7% | Added |
| UBS Asset Management Americas Inc | 402,168 | $20.7M | 0.01% | +49,641+14.1% | Added |
| Prosight Management, LP | 422,000 | $21.7M | 13.74% | −178,000−29.7% | Reduced |
| Two Sigma Advisers, LP | 422,300 | $21.7M | 0.06% | +75,500+21.8% | Added |
| Northern Trust Corp | 441,284 | $22.7M | 0.00% | +100,009+29.3% | Added |
| Nuveen Asset Management, LLC | 449,991 | $23.1M | 0.01% | +77,164+20.7% | Added |
| Geode Capital Management, LLC | 563,356 | $29.0M | 0.00% | +71,775+14.6% | Added |
| Vanguard Group Inc | 681,096 | $35.0M | 0.00% | +109,420+19.1% | Added |
| Rock Springs Capital Management LP | 950,091 | $48.8M | 0.97% | −206,809−17.9% | Reduced |
| Redmile Group, LLC | 1,215,657 | $62.5M | 0.92% | −641,415−34.5% | Reduced |
| State Street Corp | 1,228,479 | $63.2M | 0.00% | +24,187+2.0% | Added |
| Dimensional Fund Advisors LP | 1,585,361 | $81.5M | 0.03% | +6,259+0.4% | Added |
| Palo Alto Investors LP | 1,731,482 | $89.0M | 4.91% | −11,023−0.6% | Reduced |
| First Light Asset Management, LLC | 1,927,829 | $99.1M | 5.95% | −1,007,878−34.3% | Reduced |
| FMR LLC | 2,778,287 | $142.8M | 0.01% | −337,909−10.8% | Reduced |
| BlackRock Inc. | 3,681,848 | $189.3M | 0.01% | +90,840+2.5% | Added |
| Price T Rowe Associates Inc | 5,823,085 | $299.4M | 0.03% | +2,510,739+75.8% | Added |
| EcoR1 Capital, LLC | 11,284,280 | $580.1M | 21.77% | +250,000+2.3% | Added |
| TSFG, LLC | 2 | – | – | 00.0% | Unchanged |
| Ikarian Capital, LLC | 0 | $0 | 0.00% | −437,430−100.0% | Sold out |
| Jacobs Levy Equity Management, Inc | 0 | $0 | 0.00% | −313,851−100.0% | Sold out |
| Hudson Bay Capital Management LP | 0 | $0 | 0.00% | −70,000−100.0% | Sold out |
| Eversept Partners, LP | 0 | $0 | 0.00% | −68,575−100.0% | Sold out |
| Acadian Asset Management LLC | 0 | $0 | 0.00% | −66,043−100.0% | Sold out |
| Russell Investments Group, Ltd. | 0 | $0 | 0.00% | −65,119−100.0% | Sold out |
| California Public Employees Retirement System | 0 | $0 | 0.00% | −62,500−100.0% | Sold out |
| Citadel Advisors LLC | 0 | $0 | 0.00% | −56,273−100.0% | Sold out |
| Boothbay Fund Management, LLC | 0 | $0 | 0.00% | −48,162−100.0% | Sold out |
| Marshall Wace North America L.P. | 0 | $0 | 0.00% | −30,601−100.0% | Sold out |
| Walleye Trading LLC | 0 | $0 | 0.00% | −23,587−100.0% | Sold out |
| Marshall Wace, LLP | 0 | $0 | 0.00% | −23,553−100.0% | Sold out |
| SG3 Management, LLC | 0 | $0 | 0.00% | −22,500−100.0% | Sold out |
| Caption Management, LLC | 0 | $0 | 0.00% | −21,000−100.0% | Sold out |
| Ameriprise Financial Inc | 0 | $0 | 0.00% | −17,792−100.0% | Sold out |
| Connacht Asset Management LP | 0 | $0 | 0.00% | −15,313−100.0% | Sold out |
| Belvedere Trading LLC | 0 | $0 | 0.00% | −14,584−100.0% | Sold out |
| Natixis Advisors, L.P. | 0 | $0 | 0.00% | −12,972−100.0% | Sold out |
| Metropolitan Life Insurance Co | 0 | $0 | 0.00% | −9,566−100.0% | Sold out |
| Group One Trading, L.P. | 0 | $0 | 0.00% | −7,550−100.0% | Sold out |
| Quantbot Technologies LP | 0 | $0 | 0.00% | −2,451−100.0% | Sold out |
| Bank of Montreal | 0 | $0 | 0.00% | −2,300−100.0% | Sold out |
| Spire Wealth Management | 0 | $0 | 0.00% | −1,068−100.0% | Sold out |
| Pacer Advisors, Inc. | 0 | $0 | 0.00% | −952−100.0% | Sold out |