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 2026
Institutional positions in Prothena Corp Public Ltd Co as of Jun 30, 2026. 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
- +5 vs. Q1 2026
- Shares held
- 47.3M
- +304.2K (+0.6%) vs. Q1 2026
- Total value
- $462.7M
- +$6.28M (+1.4%) vs. Q1 2026
- New holders
- 28
- 55 more added
- Sold out
- 23
- 58 more reduced
4 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2026: 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 2026
Shares, value and share of portfolio for each institution holding Prothena Corp Public Ltd Co; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Aquatic Capital Management LLC | 25,419 | $248.9K | 0.01% | +25,419 | New |
| MetLife Investment Management | 25,890 | $253.5K | 0.00% | +6,374+32.7% | Added |
| JPMorgan Chase & Co | 26,620 | $265.4K | 0.00% | +653+2.5% | Added |
| The PNC Financial Services Group, Inc. | 28,386 | $277.9K | 0.00% | 00.0% | Unchanged |
| Great Lakes Advisors, LLC | 28,733 | $281.3K | 0.00% | −860−2.9% | Reduced |
| RBF Capital, LLC | 29,200 | $285.9K | 0.01% | 00.0% | Unchanged |
| Winton Group Ltd | 30,500 | $298.6K | 0.01% | −4,200−12.1% | Reduced |
| SEI Investments Co | 30,877 | $302.3K | 0.00% | +13,629+79.0% | Added |
| Barclays PLC | 37,623 | $368.3K | 0.00% | −3,239−7.9% | Reduced |
| Persistent Asset Partners Ltd | 38,100 | $373.0K | 0.12% | +38,100 | New |
| Shelton Capital Management | 39,472 | $386.4K | 0.01% | +39,472 | New |
| Virtus Investment Advisers, Inc. | 39,660 | $388.3K | 0.09% | +13,340+50.7% | Added |
| Rafferty Asset Management, LLC | 40,397 | $395.5K | 0.00% | −12,869−24.2% | Reduced |
| Engineers Gate Manager LP | 41,270 | $404.0K | 0.01% | +41,270 | New |
| Public Employees Retirement System of Ohio | 42,158 | $412.7K | 0.00% | 00.0% | Unchanged |
| Deutsche Bank AG | 43,270 | $423.6K | 0.00% | +3,252+8.1% | Added |
| Seven Fleet Capital Management LP | 43,300 | $423.9K | 0.07% | 00.0% | Unchanged |
| Wells Fargo & Company | 49,520 | $484.8K | 0.00% | +22,183+81.1% | Added |
| Edgewood Management LLC | 50,000 | $489.5K | 0.01% | 00.0% | Unchanged |
| Quinn Opportunity Partners LLC | 50,000 | $489.5K | 0.02% | 00.0% | Unchanged |
| HSBC Holdings PLC | 49,569 | $492.2K | 0.00% | −15,501−23.8% | Reduced |
| Schonfeld Strategic Advisors LLC | 50,350 | $492.9K | 0.00% | +37,951+306.1% | Added |
| Rhumbline Advisers | 55,896 | $547.2K | 0.00% | +529+1.0% | Added |
| Citigroup Inc | 57,827 | $566.1K | 0.00% | +49,677+609.5% | Added |
| Pinnacle Associates Ltd | 57,918 | $567.0K | 0.01% | −2,744−4.5% | Reduced |
| Creative Planning | 62,620 | $613.0K | 0.00% | −10,366−14.2% | Reduced |
| Assenagon Asset Management S.A. | 62,785 | $614.7K | 0.00% | −13,984−18.2% | Reduced |
| Campbell & CO Investment Adviser LLC | 68,345 | $669.1K | 0.04% | −74,242−52.1% | Reduced |
| Alliancebernstein L.P. | 69,217 | $672.8K | 0.00% | −390−0.6% | Reduced |
| Duncan Williams Asset Management, LLC | 70,281 | $688.1K | 0.16% | 00.0% | Unchanged |
| State of Wisconsin Investment Board | 70,326 | $688.5K | 0.00% | +70,326 | New |
| Invesco Ltd. | 71,479 | $699.8K | 0.00% | +21,671+43.5% | Added |
| DCF Advisers, LLC | 73,247 | $717.1K | 0.19% | 00.0% | Unchanged |
| Trexquant Investment LP | 76,731 | $751.2K | 0.00% | +52,188+212.6% | Added |
| Martingale Asset Management L P | 78,800 | $771.5K | 0.02% | +9,699+14.0% | Added |
| ExodusPoint Capital Management, LP | 82,023 | $803.0K | 0.01% | +70,851+634.2% | Added |
| Susquehanna Portfolio Strategies, LLC | 82,710 | $809.7K | 0.01% | +14,840+21.9% | Added |
| XTX Topco Ltd | 85,717 | $839.2K | 0.01% | −6,609−7.2% | Reduced |
| Ameriprise Financial Inc | 87,215 | $853.8K | 0.00% | −1,997−2.2% | Reduced |
| American Century Companies Inc | 90,644 | $887.4K | 0.00% | +11,013+13.8% | Added |
| Hennion & Walsh Asset Management, Inc. | 90,795 | $888.9K | 0.03% | +2,251+2.5% | Added |
| Price T Rowe Associates Inc | 109,252 | $1.07M | 0.00% | +13,603+14.2% | Added |
| Russell Investments Group, Ltd. | 121,901 | $1.19M | 0.00% | +21,274+21.1% | Added |
| Massachusetts Financial Services Co | 126,990 | $1.24M | 0.00% | −5,061−3.8% | Reduced |
| Bank of New York Mellon Corp | 133,906 | $1.31M | 0.00% | −2,416−1.8% | Reduced |
| Diadema Partners LP | 149,482 | $1.46M | 0.52% | +149,482 | New |
| Quantinno Capital Management LP | 158,331 | $1.55M | 0.00% | +14,032+9.7% | Added |
| Marshall Wace, LLP | 190,834 | $1.87M | 0.00% | +146,260+328.1% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 191,693 | $1.88M | 0.00% | +35,142+22.4% | Added |
| Focused Wealth Management, Inc | 207,445 | $2.03M | 0.18% | +420.0% | Added |
| Bank of America Corp | 208,246 | $2.04M | 0.00% | −185,386−47.1% | Reduced |
| Squarepoint Ops LLC | 223,971 | $2.19M | 0.00% | −6,949−3.0% | Reduced |
| Mackenzie Financial Corp | 239,899 | $2.35M | 0.00% | +239,899 | New |
| UBS Group AG | 241,425 | $2.36M | 0.00% | −87,066−26.5% | Reduced |
| Vanguard Fiduciary Trust Co | 259,064 | $2.54M | 0.00% | +4,491+1.8% | Added |
| Penbrook Management LLC | 271,720 | $2.66M | 1.70% | 00.0% | Unchanged |
| AQR Capital Management LLC | 302,572 | $2.96M | 0.00% | +98,556+48.3% | Added |
| BNP Paribas Arbitrage, SA | 315,803 | $3.09M | 0.00% | −108,793−25.6% | Reduced |
| Monimus Capital Management, LP | 329,052 | $3.22M | 0.82% | −156,565−32.2% | Reduced |
| Citadel Advisors LLC | 338,810 | $3.32M | 0.00% | −96,764−22.2% | Reduced |
| Charles Schwab Investment Management Inc | 355,896 | $3.48M | 0.00% | −769−0.2% | Reduced |
| Rangeley Capital, LLC | 417,270 | $4.09M | 3.99% | −32,190−7.2% | Reduced |
| Birchview Capital, LP | 449,019 | $4.40M | 2.06% | 00.0% | Unchanged |
| Northern Trust Corp | 457,124 | $4.48M | 0.00% | +87,582+23.7% | Added |
| Vanguard Capital Management LLC | 479,945 | $4.70M | 0.00% | −4,181−0.9% | Reduced |
| Nuveen, LLC | 557,157 | $5.45M | 0.00% | −202,211−26.6% | Reduced |
| Mariner, LLC | 625,095 | $6.12M | 0.01% | +62,013+11.0% | Added |
| Man Group plc | 678,116 | $6.64M | 0.01% | +296,542+77.7% | Added |
| Renaissance Technologies LLC | 697,615 | $6.83M | 0.01% | +90,100+14.8% | Added |
| Qube Research & Technologies Ltd | 791,169 | $7.75M | 0.01% | +176,566+28.7% | Added |
| Dimensional Fund Advisors LP | 905,651 | $8.87M | 0.00% | +123,048+15.7% | Added |
| Jacobs Levy Equity Management, Inc | 965,988 | $9.46M | 0.03% | −6,029−0.6% | Reduced |
| Goldman Sachs Group Inc | 979,730 | $9.59M | 0.00% | +160,845+19.6% | Added |
| Morgan Stanley | 995,348 | $9.74M | 0.00% | −235,100−19.1% | Reduced |
| Federated Hermes, Inc. | 1,084,401 | $10.6M | 0.02% | +24,552+2.3% | Added |
| Geode Capital Management, LLC | 1,125,877 | $11.0M | 0.00% | +27,711+2.5% | Added |
| Palo Alto Investors LP | 1,143,155 | $11.2M | 1.55% | −65,413−5.4% | Reduced |
| Two Sigma Investments, LP | 1,264,987 | $12.4M | 0.01% | +59,009+4.9% | Added |
| ADAR1 Capital Management, LLC | 1,554,535 | $15.2M | 0.72% | −26,908−1.7% | Reduced |
| D. E. Shaw & Co., Inc. | 1,611,457 | $15.8M | 0.01% | −151,890−8.6% | Reduced |
| Vanguard Portfolio Management LLC | 1,651,293 | $16.2M | 0.00% | +205,314+14.2% | Added |
| Acadian Asset Management LLC | 2,010,645 | $19.7M | 0.02% | +463,052+29.9% | Added |
| State Street Corp | 2,393,424 | $23.4M | 0.00% | +454,926+23.5% | Added |
| BlackRock, Inc. | 4,867,955 | $47.7M | 0.00% | +223,795+4.8% | Added |
| Rubric Capital Management LP | 5,000,000 | $49.0M | 0.45% | 00.0% | Unchanged |
| FMR LLC | 7,199,218 | $70.5M | 0.00% | −352,000−4.7% | Reduced |
| Coppell Advisory Solutions LLC | 12 | – | – | +12 | New |
| Armistice Capital, LLC | 0 | $0 | 0.00% | −439,411−100.0% | Sold out |
| Point72 Asset Management, L.P. | 0 | $0 | 0.00% | −399,830−100.0% | Sold out |
| Walleye Capital LLC | 0 | $0 | 0.00% | −277,168−100.0% | Sold out |
| Jane Street Group, LLC | 0 | $0 | 0.00% | −107,926−100.0% | Sold out |
| Y-Intercept (Hong Kong) Ltd | 0 | $0 | 0.00% | −100,805−100.0% | Sold out |
| Jackson Creek Investment Advisors LLC | 0 | $0 | 0.00% | −54,089−100.0% | Sold out |
| Fox Run Management, L.L.C. | 0 | $0 | 0.00% | −35,052−100.0% | Sold out |
| Gsa Capital Partners LLP | 0 | $0 | 0.00% | −32,499−100.0% | Sold out |
| Cornerstone Investment Partners, LLC | 0 | $0 | 0.00% | −30,687−100.0% | Sold out |
| Susquehanna International Group, LLP | 0 | $0 | 0.00% | −17,792−100.0% | Sold out |
| SG Americas Securities, LLC | 0 | $0 | 0.00% | −13,522−100.0% | Sold out |
| Intech Investment Management LLC | 0 | $0 | 0.00% | −11,874−100.0% | Sold out |
| Vontobel Holding Ltd. | 0 | $0 | 0.00% | −10,000−100.0% | Sold out |