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 5 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 2023
Institutional positions in Prothena Corp Public Ltd Co as of Sep 30, 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
- −6 vs. Q2 2023
- Shares held
- 53.0M
- +1.07M (+2.1%) vs. Q2 2023
- Total value
- $2.56B
- −$984.1M (−27.8%) vs. Q2 2023
- New holders
- 25
- 73 more added
- Sold out
- 31
- 51 more reduced
3 institutions that held it in Q2 2023 haven't filed for Q3 2023 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 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, Q3 2023
Shares, value and share of portfolio for each institution holding Prothena Corp Public Ltd Co; share changes are against Q2 2023.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| AQR Capital Management LLC | 18,509 | $893.1K | 0.00% | −777−4.0% | Reduced |
| Twinbeech Capital LP | 18,376 | $886.6K | 0.02% | +18,376 | New |
| Aquatic Capital Management LLC | 16,100 | $777.0K | 0.03% | +16,100 | New |
| Guggenheim Capital LLC | 15,343 | $740.3K | 0.01% | +163+1.1% | Added |
| International Biotechnology Trust PLC | 15,000 | $722.9K | 0.24% | +15,000 | New |
| DekaBank Deutsche Girozentrale | 14,000 | $682.0K | 0.00% | 00.0% | Unchanged |
| Martingale Asset Management L P | 12,415 | $599.0K | 0.01% | +1,097+9.7% | Added |
| State Board of Administration of Florida Retirement System | 11,916 | $574.9K | 0.00% | +150+1.3% | Added |
| HRT Financial LP | 11,459 | $552.0K | 0.01% | +11,459 | New |
| Engineers Gate Manager LP | 11,384 | $549.3K | 0.02% | +7,683+207.6% | Added |
| Arizona State Retirement System | 11,265 | $543.5K | 0.00% | +184+1.7% | Added |
| Teacher Retirement System of Texas | 11,231 | $542.0K | 0.00% | +529+4.9% | Added |
| Teachers Retirement System of the State of Kentucky | 11,144 | $538.0K | 0.01% | 00.0% | Unchanged |
| XTX Topco Ltd | 11,112 | $536.2K | 0.09% | +11,112 | New |
| Ameriprise Financial Inc | 11,063 | $533.8K | 0.00% | −853−7.2% | Reduced |
| Fox Run Management, L.L.C. | 9,617 | $464.0K | 0.14% | +9,617 | New |
| Bayesian Capital Management, LP | 9,299 | $448.7K | 0.05% | +9,299 | New |
| Walleye Trading LLC | 9,267 | $447.1K | 0.01% | +3,910+73.0% | Added |
| HighVista Strategies LLC | 9,195 | $443.7K | 0.21% | +2,789+43.5% | Added |
| Corton Capital Inc. | 9,091 | $438.6K | 0.22% | +1,560+20.7% | Added |
| ProShare Advisors LLC | 8,888 | $428.8K | 0.00% | +82+0.9% | Added |
| Victory Capital Management Inc | 8,781 | $423.7K | 0.00% | −17,526−66.6% | Reduced |
| Royal Bank of Canada | 8,463 | $409.0K | 0.00% | +290+3.5% | Added |
| Raymond James & Associates | 8,167 | $394.1K | 0.00% | +4,050+98.4% | Added |
| Capstone Investment Advisors, LLC | 8,135 | $392.5K | 0.01% | +8,135 | New |
| E Fund Management Co., Ltd. | 8,059 | $389.0K | 0.03% | +1,632+25.4% | Added |
| Oppenheimer & Co Inc | 7,908 | $381.6K | 0.01% | +295+3.9% | Added |
| Point72 Middle East FZE | 7,716 | $372.3K | 0.02% | −4,072−34.5% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 7,464 | $360.1K | 0.00% | +797+12.0% | Added |
| HighMark Wealth Management LLC | 7,352 | $354.7K | 0.29% | 00.0% | Unchanged |
| STRS Ohio | 6,900 | $332.0K | 0.00% | −6,100−46.9% | Reduced |
| Allianz Asset Management GmbH | 6,800 | $328.1K | 0.00% | −9,000−57.0% | Reduced |
| Public Employees Retirement Association of Colorado | 6,552 | $316.0K | 0.00% | 00.0% | Unchanged |
| Amalgamated Bank | 6,327 | $305.0K | 0.00% | +138+2.2% | Added |
| Jane Street Group, LLC | 6,256 | $301.9K | 0.00% | −47,219−88.3% | Reduced |
| Snowden Capital Advisors LLC | 6,000 | $289.5K | 0.01% | −73−1.2% | Reduced |
| Magnetar Financial LLC | 5,923 | $285.8K | 0.01% | +5,923 | New |
| Occudo Quantitative Strategies LP | 5,223 | $252.0K | 0.03% | +5,223 | New |
| Pictet Asset Management Holding SA | 5,057 | $244.0K | 0.00% | +5,057 | New |
| Man Group plc | – | $229.5K | 0.00% | – | – |
| SEI Investments Co | 4,717 | $227.6K | 0.00% | −2,385−33.6% | Reduced |
| Advisor Group Holdings, Inc. | 4,440 | $214.2K | 0.00% | +1,323+42.4% | Added |
| Captrust Financial Advisors | 4,338 | $209.3K | 0.00% | −144−3.2% | Reduced |
| Walleye Capital LLC | 4,286 | $206.8K | 0.00% | −51,366−92.3% | Reduced |
| Beirne Wealth Consulting Services, LLC | 3,000 | $204.8K | 0.16% | 00.0% | Unchanged |
| US Bancorp | 4,182 | $201.8K | 0.00% | −3,256−43.8% | Reduced |
| Schroder Investment Management Group | 4,232 | $200.8K | 0.00% | +234+5.9% | Added |
| Ameritas Investment Partners, Inc. | 4,119 | $198.7K | 0.01% | +696+20.3% | Added |
| Allspring Global Investments Holdings, LLC | 3,096 | $149.4K | 0.00% | +1,140+58.3% | Added |
| Jefferies Financial Group Inc. | 3,085 | $148.9K | 0.00% | +2,240+265.1% | Added |
| Metropolitan Life Insurance Co | 2,389 | $115.3K | 0.01% | +125+5.5% | Added |
| Headlands Technologies LLC | 1,531 | $73.9K | 0.04% | +1,531 | New |
| Nisa Investment Advisors, LLC | 1,510 | $72.9K | 0.00% | +20+1.3% | Added |
| Tower Research Capital LLC (TRC) | 1,398 | $67.5K | 0.00% | −1,137−44.9% | Reduced |
| China Universal Asset Management Co., Ltd. | 1,375 | $66.3K | 0.02% | +684+99.0% | Added |
| Virtus ETF Advisers LLC | 1,372 | $66.2K | 0.04% | −141−9.3% | Reduced |
| KBC Group NV | 930 | $45.0K | 0.00% | +930 | New |
| The PNC Financial Services Group, Inc. | 422 | $20.4K | 0.00% | 00.0% | Unchanged |
| Signaturefd, LLC | 295 | $14.2K | 0.00% | −6−2.0% | Reduced |
| Byrne Asset Management LLC | 280 | $14.0K | 0.01% | +20+7.7% | Added |
| Asset Dedication, LLC | 184 | $9.00K | 0.00% | 00.0% | Unchanged |
| Daiwa Securities Group Inc. | 195 | $9.00K | 0.00% | 00.0% | Unchanged |
| Kelly Financial Services LLC | 182 | $8.78K | 0.00% | 00.0% | Unchanged |
| Sittner & Nelson, LLC | 155 | $7.48K | 0.00% | 00.0% | Unchanged |
| Focused Wealth Management, Inc | 129 | $6.22K | 0.00% | 00.0% | Unchanged |
| Albion Financial Group | 125 | $6.03K | 0.00% | 00.0% | Unchanged |
| Truvestments Capital LLC | 108 | $5.21K | 0.00% | 00.0% | Unchanged |
| Harbor Investment Advisory, LLC | 100 | $4.83K | 0.00% | 00.0% | Unchanged |
| Gould Capital, LLC | 100 | $4.66K | 0.00% | 00.0% | Unchanged |
| CWM, LLC | 47 | $2.00K | 0.00% | +13+38.2% | Added |
| EverSource Wealth Advisors, LLC | 28 | $1.35K | 0.00% | −281−90.9% | Reduced |
| Farther Finance Advisors, LLC | 26 | $1.25K | 0.00% | 00.0% | Unchanged |
| Allworth Financial LP | 25 | $1.21K | 0.00% | +2+8.7% | Added |
| Quadrant Capital Group LLC | 19 | $917 | 0.00% | 00.0% | Unchanged |
| Lindbrook Capital, LLC | 16 | $772 | 0.00% | −6−27.3% | Reduced |
| Blue Bell Private Wealth Management, LLC | 12 | $579 | 0.00% | 00.0% | Unchanged |
| Lowe Wealth Advisors, LLC | 10 | $483 | 0.00% | 00.0% | Unchanged |
| Federated Hermes, Inc. | 9 | $434 | 0.00% | −30,847−100.0% | Reduced |
| Harbour Investments, Inc. | 5 | $241 | 0.00% | 00.0% | Unchanged |
| Tfo-TDC, LLC | 3 | $205 | 0.00% | +3 | New |
| JFS Wealth Advisors, LLC | 4 | $193 | 0.00% | 00.0% | Unchanged |
| Huntington National Bank | 4 | $193 | 0.00% | 00.0% | Unchanged |
| Register Financial Advisors LLC | 4 | $193 | 0.00% | +4 | New |
| Whittier Trust Co of Nevada Inc | 3 | $144 | 0.00% | 00.0% | Unchanged |
| Gradient Investments LLC | 1 | $48 | 0.00% | 00.0% | Unchanged |
| Covestor Ltd | 3 | $0 | 0.00% | 00.0% | Unchanged |
| Steward Financial Group LLC | 4 | $0 | 0.00% | +4 | New |
| Atika Capital Management LLC | 0 | $0 | 0.00% | −97,500−100.0% | Sold out |
| EAM Global Investors LLC | 0 | $0 | 0.00% | −70,872−100.0% | Sold out |
| Bank of Montreal | 0 | $0 | 0.00% | −66,767−100.0% | Sold out |
| Integral Health Asset Management, LLC | 0 | $0 | 0.00% | −52,000−100.0% | Sold out |
| EAM Investors, LLC | 0 | $0 | 0.00% | −49,656−100.0% | Sold out |
| Empowered Funds, LLC | 0 | $0 | 0.00% | −43,937−100.0% | Sold out |
| Woodline Partners LP | 0 | $0 | 0.00% | −41,633−100.0% | Sold out |
| Macquarie Group Ltd | 0 | $0 | 0.00% | −34,369−100.0% | Sold out |
| Prudential Financial Inc | 0 | $0 | 0.00% | −22,911−100.0% | Sold out |
| Fred Alger Management, LLC | 0 | $0 | 0.00% | −22,064−100.0% | Sold out |
| Advisory Research Inc | 0 | $0 | 0.00% | −22,039−100.0% | Sold out |
| Franklin Resources Inc | 0 | $0 | 0.00% | −20,739−100.0% | Sold out |
| Ergoteles LLC | 0 | $0 | 0.00% | −13,276−100.0% | Sold out |