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 $465.6M in total; no superinvestor holds it.
13F holders, Q2 2022
Institutional positions in Prothena Corp Public Ltd Co as of Jun 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
- 167
- −4 vs. Q1 2022
- Shares held
- 44.5M
- +491.0K (+1.1%) vs. Q1 2022
- Total value
- $1.21B
- −$424.2M (−25.9%) vs. Q1 2022
- New holders
- 17
- 44 more added
- Sold out
- 21
- 54 more reduced
3 institutions that held it in Q1 2022 haven't filed for Q2 2022 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 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 | $465.6M |
| Q1 2026 | 186 | $459.5M |
| Q4 2025 | 182 | $452.1M |
| Q3 2025 | 187 | $423.0M |
| Q2 2025 | 189 | $254.2M |
| Q1 2025 | 161 | $647.4M |
| Q4 2024 | 171 | $745.5M |
| Q3 2024 | 164 | $862.7M |
| Q2 2024 | 160 | $1.06B |
| Q1 2024 | 169 | $1.37B |
| Q4 2023 | 187 | $1.99B |
| Q3 2023 | 187 | $2.57B |
| Q2 2023 | 196 | $3.54B |
| Q1 2023 | 192 | $2.84B |
| Q4 2022 | 201 | $2.98B |
| Q3 2022 | 183 | $2.71B |
| Q2 2022 | 167 | $1.21B |
| Q1 2022 | 174 | $1.64B |
| Q4 2021 | 196 | $2.13B |
| Q3 2021 | 192 | $2.92B |
| Q2 2021 | 156 | $2.09B |
| Q1 2021 | 146 | $1.00B |
Institutions, Q2 2022
Shares, value and share of portfolio for each institution holding Prothena Corp Public Ltd Co; share changes are against Q1 2022.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| EcoR1 Capital, LLC | 11,584,280 | $314.5M | 10.93% | 00.0% | Unchanged |
| Price T Rowe Associates Inc | 5,965,788 | $162.0M | 0.02% | −147,954−2.4% | Reduced |
| BlackRock Inc. | 3,471,300 | $94.2M | 0.00% | −390,286−10.1% | Reduced |
| FMR LLC | 2,925,398 | $79.4M | 0.01% | +249,784+9.3% | Added |
| State Street Corp | 2,246,073 | $61.0M | 0.00% | −121,510−5.1% | Reduced |
| First Light Asset Management, LLC | 1,938,183 | $52.6M | 6.12% | +99,635+5.4% | Added |
| Palo Alto Investors LP | 1,681,477 | $45.7M | 3.98% | 00.0% | Unchanged |
| Dimensional Fund Advisors LP | 1,566,753 | $42.5M | 0.02% | +61,597+4.1% | Added |
| Vanguard Group Inc | 829,076 | $22.5M | 0.00% | −46,224−5.3% | Reduced |
| Redmile Group, LLC | 736,175 | $20.0M | 0.76% | 00.0% | Unchanged |
| Nuveen Asset Management, LLC | 723,172 | $19.6M | 0.01% | −817−0.1% | Reduced |
| Renaissance Technologies LLC | 686,000 | $18.6M | 0.02% | +291,800+74.0% | Added |
| Rock Springs Capital Management LP | 678,462 | $18.4M | 0.54% | +14,932+2.3% | Added |
| Geode Capital Management, LLC | 631,680 | $17.1M | 0.00% | −20,295−3.1% | Reduced |
| Prosight Management, LP | 550,000 | $14.9M | 12.10% | −16,538−2.9% | Reduced |
| Finepoint Capital LP | 457,500 | $12.4M | 4.29% | +457,500 | New |
| Two Sigma Advisers, LP | 447,700 | $12.2M | 0.03% | +31,500+7.6% | Added |
| Morgan Stanley | 352,582 | $9.57M | 0.00% | +3,061+0.9% | Added |
| Northern Trust Corp | 352,221 | $9.56M | 0.00% | −12,571−3.4% | Reduced |
| PFM Health Sciences, LP | 345,114 | $9.37M | 0.37% | +345,114 | New |
| Maple Rock Capital Partners Inc. | 334,000 | $9.07M | 1.05% | 00.0% | Unchanged |
| Boxer Capital, LLC | 300,000 | $8.14M | 0.52% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 286,579 | $7.78M | 0.00% | +34,439+13.7% | Added |
| Charles Schwab Investment Management Inc | 277,475 | $7.53M | 0.00% | −6,927−2.4% | Reduced |
| Goldman Sachs Group Inc | 270,184 | $7.33M | 0.00% | +11,621+4.5% | Added |
| Invesco Ltd. | 243,353 | $6.61M | 0.00% | +52,130+27.3% | Added |
| UBS Asset Management Americas Inc | 243,010 | $6.60M | 0.00% | −16,964−6.5% | Reduced |
| Two Sigma Investments, LP | 230,427 | $6.26M | 0.02% | −30,864−11.8% | Reduced |
| Millennium Management LLC | 204,670 | $5.56M | 0.01% | −68,005−24.9% | Reduced |
| Sessa Capital IM, L.P. | 187,000 | $5.08M | 0.34% | 00.0% | Unchanged |
| Janus Henderson Group PLC | 183,040 | $4.97M | 0.00% | +177,545+3,231.0% | Added |
| Marshall Wace, LLP | 178,387 | $4.84M | 0.01% | +167,861+1,594.7% | Added |
| Granahan Investment Management Inc | 159,325 | $4.33M | 0.15% | +35,219+28.4% | Added |
| Citadel Advisors LLC | 155,511 | $4.22M | 0.01% | +111,996+257.4% | Added |
| SG Americas Securities, LLC | 154,588 | $4.20M | 0.06% | +11,082+7.7% | Added |
| Pinnacle Associates Ltd | 144,426 | $3.92M | 0.09% | −408−0.3% | Reduced |
| Capital Fund Management S.A. | 137,496 | $3.73M | 0.10% | +17,103+14.2% | Added |
| Handelsbanken Fonder AB | 127,500 | $3.46M | 0.02% | +29,100+29.6% | Added |
| Bank of New York Mellon Corp | 119,364 | $3.24M | 0.00% | −34,917−22.6% | Reduced |
| TD Asset Management Inc | 111,641 | $3.03M | 0.00% | −17,500−13.6% | Reduced |
| Birchview Capital, LP | 102,548 | $2.78M | 2.03% | +60,570+144.3% | Added |
| Point72 Asset Management, L.P. | 99,900 | $2.71M | 0.01% | −73,100−42.3% | Reduced |
| Wellington Management Group LLP | 93,454 | $2.54M | 0.00% | −320.0% | Reduced |
| Citigroup Inc | 85,382 | $2.32M | 0.00% | +59,797+233.7% | Added |
| Rafferty Asset Management, LLC | 81,472 | $2.21M | 0.02% | −62,075−43.2% | Reduced |
| Swiss National Bank | 77,200 | $2.10M | 0.00% | 00.0% | Unchanged |
| Norges Bank | 76,800 | $2.09M | 0.00% | 00.0% | Unchanged |
| Guggenheim Capital LLC | 76,216 | $2.07M | 0.02% | +76,216 | New |
| DCF Advisers, LLC | 67,856 | $1.84M | 1.23% | −8,144−10.7% | Reduced |
| Bank of America Corp | 65,344 | $1.77M | 0.00% | −92,875−58.7% | Reduced |
| D. E. Shaw & Co., Inc. | 61,196 | $1.66M | 0.00% | −25,957−29.8% | Reduced |
| RBF Capital, LLC | 45,362 | $1.66M | 0.12% | 00.0% | Unchanged |
| Platinum Investment Management Ltd | 60,512 | $1.64M | 0.06% | 00.0% | Unchanged |
| Manufacturers Life Insurance Company, The | 53,336 | $1.43M | 0.00% | −1,307−2.4% | Reduced |
| Ensign Peak Advisors, Inc | 49,877 | $1.35M | 0.00% | 00.0% | Unchanged |
| Alliancebernstein L.P. | 45,366 | $1.23M | 0.00% | +966+2.2% | Added |
| Man Group plc | – | $1.21M | 0.01% | – | New |
| First Trust Advisors LP | 43,715 | $1.19M | 0.00% | −5,352−10.9% | Reduced |
| Rhumbline Advisers | 43,305 | $1.18M | 0.00% | +992+2.3% | Added |
| California State Teachers Retirement System | 43,171 | $1.17M | 0.00% | −64−0.1% | Reduced |
| ExodusPoint Capital Management, LP | 42,213 | $1.15M | 0.02% | −28,489−40.3% | Reduced |
| New York Life Investments Alternatives | 41,092 | $1.12M | 1.03% | −643−1.5% | Reduced |
| Prudential Financial Inc | 39,889 | $1.08M | 0.00% | −32,420−44.8% | Reduced |
| State of Wisconsin Investment Board | 35,083 | $953.0K | 0.00% | −13,317−27.5% | Reduced |
| New York State Common Retirement Fund | 34,725 | $943.0K | 0.00% | −5,348−13.3% | Reduced |
| Balyasny Asset Management LLC | 34,377 | $933.0K | 0.00% | +34,377 | New |
| Principal Financial Group Inc | 33,936 | $921.0K | 0.00% | +3,363+11.0% | Added |
| Susquehanna International Group, LLP | 31,981 | $868.0K | 0.00% | −17,205−35.0% | Reduced |
| Hussman Strategic Advisors, Inc. | 31,200 | $847.0K | 0.15% | +15,600+100.0% | Added |
| Alps Advisors Inc | 27,770 | $754.0K | 0.01% | −20,212−42.1% | Reduced |
| Credit Suisse AG | 27,724 | $753.0K | 0.00% | +369+1.3% | Added |
| AXA S.A. | 26,325 | $714.7K | 0.00% | −8,775−25.0% | Reduced |
| Bank of Montreal | 24,893 | $692.0K | 0.00% | −22,653−47.6% | Reduced |
| Ameriprise Financial Inc | 25,209 | $685.0K | 0.00% | −3,047−10.8% | Reduced |
| Jane Street Group, LLC | 25,168 | $683.0K | 0.00% | +25,168 | New |
| Edgewood Management LLC | 25,000 | $679.0K | 0.00% | 00.0% | Unchanged |
| ETF Managers Group, LLC | 24,869 | $667.0K | 0.02% | +24,869 | New |
| Jennison Associates LLC | 24,016 | $652.0K | 0.00% | −29−0.1% | Reduced |
| Tudor Investment Corp Et Al | 23,459 | $637.0K | 0.02% | +23,459 | New |
| UBS Group AG | 20,823 | $566.0K | 0.00% | −27,596−57.0% | Reduced |
| Deutsche Bank AG | 19,873 | $539.0K | 0.00% | −2,471−11.1% | Reduced |
| Victory Capital Management Inc | 19,751 | $537.0K | 0.00% | +4,341+28.2% | Added |
| STRS Ohio | 19,600 | $532.0K | 0.00% | +3,200+19.5% | Added |
| MetLife Investment Management | 19,561 | $531.1K | 0.00% | 00.0% | Unchanged |
| Kiwi Wealth Investments Limited Partnership | 16,900 | $458.8K | 0.03% | +16,900 | New |
| American International Group, Inc. | 16,604 | $451.0K | 0.00% | −1,344−7.5% | Reduced |
| Legal & General Group Plc | 16,069 | $437.0K | 0.00% | +1,394+9.5% | Added |
| State Board of Administration of Florida Retirement System | 16,066 | $436.0K | 0.00% | 00.0% | Unchanged |
| Connor, Clark & Lunn Investment Management Ltd. | 16,030 | $435.0K | 0.00% | +16,030 | New |
| Mariner, LLC | 15,090 | $410.0K | 0.00% | −59,040−79.6% | Reduced |
| Dynamic Technology Lab Private Ltd | 15,090 | $410.0K | 0.05% | +15,090 | New |
| NinePointTwo Capital | 14,419 | $391.0K | 0.14% | +2,945+25.7% | Added |
| Allianz Asset Management GmbH | 13,895 | $377.0K | 0.00% | −2,700−16.3% | Reduced |
| Qube Research & Technologies Ltd | 13,878 | $377.0K | 0.00% | +7,909+132.5% | Added |
| Voya Investment Management LLC | 13,795 | $375.0K | 0.00% | −500−3.5% | Reduced |
| DekaBank Deutsche Girozentrale | 14,000 | $368.0K | 0.00% | 00.0% | Unchanged |
| Putnam Investments LLC | 13,484 | $366.0K | 0.00% | +1,337+11.0% | Added |
| Allspring Global Investments Holdings, LLC | 13,108 | $355.0K | 0.00% | −12,691−49.2% | Reduced |
| Fox Run Management, L.L.C. | 12,918 | $351.0K | 0.18% | +12,918 | New |
| Royal Bank of Canada | 12,833 | $348.0K | 0.00% | +2,026+18.7% | Added |