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 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
- −$400.2M (−24.8%) 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 | $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 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 |
|---|---|---|---|---|---|
| Principal Financial Group Inc | 33,936 | $921.0K | 0.00% | +3,363+11.0% | Added |
| Balyasny Asset Management LLC | 34,377 | $933.0K | 0.00% | +34,377 | New |
| New York State Common Retirement Fund | 34,725 | $943.0K | 0.00% | −5,348−13.3% | Reduced |
| State of Wisconsin Investment Board | 35,083 | $953.0K | 0.00% | −13,317−27.5% | Reduced |
| Prudential Financial Inc | 39,889 | $1.08M | 0.00% | −32,420−44.8% | Reduced |
| New York Life Investments Alternatives | 41,092 | $1.12M | 1.03% | −643−1.5% | Reduced |
| ExodusPoint Capital Management, LP | 42,213 | $1.15M | 0.02% | −28,489−40.3% | Reduced |
| California State Teachers Retirement System | 43,171 | $1.17M | 0.00% | −64−0.1% | Reduced |
| Rhumbline Advisers | 43,305 | $1.18M | 0.00% | +992+2.3% | Added |
| First Trust Advisors LP | 43,715 | $1.19M | 0.00% | −5,352−10.9% | Reduced |
| Man Group plc | – | $1.21M | 0.01% | – | New |
| Alliancebernstein L.P. | 45,366 | $1.23M | 0.00% | +966+2.2% | Added |
| Ensign Peak Advisors, Inc | 49,877 | $1.35M | 0.00% | 00.0% | Unchanged |
| Manufacturers Life Insurance Company, The | 53,336 | $1.43M | 0.00% | −1,307−2.4% | Reduced |
| Platinum Investment Management Ltd | 60,512 | $1.64M | 0.06% | 00.0% | Unchanged |
| RBF Capital, LLC | 45,362 | $1.66M | 0.12% | 00.0% | Unchanged |
| D. E. Shaw & Co., Inc. | 61,196 | $1.66M | 0.00% | −25,957−29.8% | Reduced |
| Bank of America Corp | 65,344 | $1.77M | 0.00% | −92,875−58.7% | Reduced |
| DCF Advisers, LLC | 67,856 | $1.84M | 1.23% | −8,144−10.7% | Reduced |
| Guggenheim Capital LLC | 76,216 | $2.07M | 0.02% | +76,216 | New |
| Norges Bank | 76,800 | $2.09M | 0.00% | 00.0% | Unchanged |
| Swiss National Bank | 77,200 | $2.10M | 0.00% | 00.0% | Unchanged |
| Rafferty Asset Management, LLC | 81,472 | $2.21M | 0.02% | −62,075−43.2% | Reduced |
| Citigroup Inc | 85,382 | $2.32M | 0.00% | +59,797+233.7% | Added |
| Wellington Management Group LLP | 93,454 | $2.54M | 0.00% | −320.0% | Reduced |
| Point72 Asset Management, L.P. | 99,900 | $2.71M | 0.01% | −73,100−42.3% | Reduced |
| Birchview Capital, LP | 102,548 | $2.78M | 2.03% | +60,570+144.3% | Added |
| TD Asset Management Inc | 111,641 | $3.03M | 0.00% | −17,500−13.6% | Reduced |
| Bank of New York Mellon Corp | 119,364 | $3.24M | 0.00% | −34,917−22.6% | Reduced |
| Handelsbanken Fonder AB | 127,500 | $3.46M | 0.02% | +29,100+29.6% | Added |
| Capital Fund Management S.A. | 137,496 | $3.73M | 0.10% | +17,103+14.2% | Added |
| Pinnacle Associates Ltd | 144,426 | $3.92M | 0.09% | −408−0.3% | Reduced |
| SG Americas Securities, LLC | 154,588 | $4.20M | 0.06% | +11,082+7.7% | Added |
| Citadel Advisors LLC | 155,511 | $4.22M | 0.01% | +111,996+257.4% | Added |
| Granahan Investment Management Inc | 159,325 | $4.33M | 0.15% | +35,219+28.4% | Added |
| Marshall Wace, LLP | 178,387 | $4.84M | 0.01% | +167,861+1,594.7% | Added |
| Janus Henderson Group PLC | 183,040 | $4.97M | 0.00% | +177,545+3,231.0% | Added |
| Sessa Capital IM, L.P. | 187,000 | $5.08M | 0.34% | 00.0% | Unchanged |
| Millennium Management LLC | 204,670 | $5.56M | 0.01% | −68,005−24.9% | Reduced |
| Two Sigma Investments, LP | 230,427 | $6.26M | 0.02% | −30,864−11.8% | Reduced |
| UBS Asset Management Americas Inc | 243,010 | $6.60M | 0.00% | −16,964−6.5% | Reduced |
| Invesco Ltd. | 243,353 | $6.61M | 0.00% | +52,130+27.3% | Added |
| Goldman Sachs Group Inc | 270,184 | $7.33M | 0.00% | +11,621+4.5% | Added |
| Charles Schwab Investment Management Inc | 277,475 | $7.53M | 0.00% | −6,927−2.4% | Reduced |
| JPMorgan Chase & Co | 286,579 | $7.78M | 0.00% | +34,439+13.7% | Added |
| Boxer Capital, LLC | 300,000 | $8.14M | 0.52% | 00.0% | Unchanged |
| Maple Rock Capital Partners Inc. | 334,000 | $9.07M | 1.05% | 00.0% | Unchanged |
| PFM Health Sciences, LP | 345,114 | $9.37M | 0.37% | +345,114 | New |
| Northern Trust Corp | 352,221 | $9.56M | 0.00% | −12,571−3.4% | Reduced |
| Morgan Stanley | 352,582 | $9.57M | 0.00% | +3,061+0.9% | Added |
| Two Sigma Advisers, LP | 447,700 | $12.2M | 0.03% | +31,500+7.6% | Added |
| Finepoint Capital LP | 457,500 | $12.4M | 4.29% | +457,500 | New |
| Prosight Management, LP | 550,000 | $14.9M | 12.10% | −16,538−2.9% | Reduced |
| Geode Capital Management, LLC | 631,680 | $17.1M | 0.00% | −20,295−3.1% | Reduced |
| Rock Springs Capital Management LP | 678,462 | $18.4M | 0.54% | +14,932+2.3% | Added |
| Renaissance Technologies LLC | 686,000 | $18.6M | 0.02% | +291,800+74.0% | Added |
| Nuveen Asset Management, LLC | 723,172 | $19.6M | 0.01% | −817−0.1% | Reduced |
| Redmile Group, LLC | 736,175 | $20.0M | 0.76% | 00.0% | Unchanged |
| Vanguard Group Inc | 829,076 | $22.5M | 0.00% | −46,224−5.3% | Reduced |
| Dimensional Fund Advisors LP | 1,566,753 | $42.5M | 0.02% | +61,597+4.1% | Added |
| Palo Alto Investors LP | 1,681,477 | $45.7M | 3.98% | 00.0% | Unchanged |
| First Light Asset Management, LLC | 1,938,183 | $52.6M | 6.12% | +99,635+5.4% | Added |
| State Street Corp | 2,246,073 | $61.0M | 0.00% | −121,510−5.1% | Reduced |
| FMR LLC | 2,925,398 | $79.4M | 0.01% | +249,784+9.3% | Added |
| BlackRock Inc. | 3,471,300 | $94.2M | 0.00% | −390,286−10.1% | Reduced |
| Price T Rowe Associates Inc | 5,965,788 | $162.0M | 0.02% | −147,954−2.4% | Reduced |
| EcoR1 Capital, LLC | 11,584,280 | $314.5M | 10.95% | 00.0% | Unchanged |
| Paradigm Biocapital Advisors LP | 0 | $0 | 0.00% | −267,946−100.0% | Sold out |
| Perceptive Advisors LLC | 0 | $0 | 0.00% | −65,144−100.0% | Sold out |
| Gsa Capital Partners LLP | 0 | $0 | 0.00% | −31,142−100.0% | Sold out |
| Gotham Asset Management, LLC | 0 | $0 | 0.00% | −25,784−100.0% | Sold out |
| Engineers Gate Manager LP | 0 | $0 | 0.00% | −21,992−100.0% | Sold out |
| Twinbeech Capital LP | 0 | $0 | 0.00% | −18,374−100.0% | Sold out |
| Algert Global LLC | 0 | $0 | 0.00% | −16,875−100.0% | Sold out |
| Healthcare of Ontario Pension Plan Trust Fund | 0 | $0 | 0.00% | −16,800−100.0% | Sold out |
| AlphaCrest Capital Management LLC | 0 | $0 | 0.00% | −15,348−100.0% | Sold out |
| Massachusetts Financial Services Co | 0 | $0 | 0.00% | −13,556−100.0% | Sold out |
| HighVista Strategies LLC | 0 | $0 | 0.00% | −12,953−100.0% | Sold out |
| Franklin Resources Inc | 0 | $0 | 0.00% | −9,236−100.0% | Sold out |
| AQR Capital Management LLC | 0 | $0 | 0.00% | −8,363−100.0% | Sold out |
| HighTower Advisors, LLC | 0 | $0 | 0.00% | −7,820−100.0% | Sold out |
| Teacher Retirement System of Texas | 0 | $0 | 0.00% | −6,685−100.0% | Sold out |
| King Wealth | 0 | $0 | 0.00% | −6,000−100.0% | Sold out |
| Aquatic Capital Management LLC | 0 | $0 | 0.00% | −2,000−100.0% | Sold out |
| Group One Trading, L.P. | 0 | $0 | 0.00% | −1,029−100.0% | Sold out |
| Lloyd Advisory Services, LLC. | 0 | $0 | 0.00% | −48−100.0% | Sold out |
| Investors Research Corp | 0 | $0 | 0.00% | −4−100.0% | Sold out |
| Cordant, Inc. | 0 | $0 | 0.00% | −4−100.0% | Sold out |
| Parametric Portfolio Associates LLC | – | – | – | – | Not filed |
| Virginia Retirement Systems Et Al | – | – | – | – | Not filed |
| Amalgamated Financial Corp. | – | – | – | – | Not filed |