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, Q3 2021
Institutional positions in Prothena Corp Public Ltd Co as of Sep 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
- 192
- +37 vs. Q2 2021
- Shares held
- 40.9M
- +504.5K (+1.2%) vs. Q2 2021
- Total value
- $2.92B
- +$837.8M (+40.3%) vs. Q2 2021
- New holders
- 50
- 57 more added
- Sold out
- 13
- 49 more reduced
1 institution that held it in Q2 2021 haven't filed for Q3 2021 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 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, Q3 2021
Shares, value and share of portfolio for each institution holding Prothena Corp Public Ltd Co; share changes are against Q2 2021.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Seven Eight Capital, LP | 14,800 | $1.05M | 0.10% | +14,800 | New |
| State Board of Administration of Florida Retirement System | 16,211 | $1.16M | 0.00% | +180+1.1% | Added |
| Robeco Institutional Asset Management B.V. | 16,960 | $1.21M | 0.00% | +16,960 | New |
| Manufacturers Life Insurance Company, The | 17,283 | $1.23M | 0.00% | −1,371−7.3% | Reduced |
| Los Angeles Capital Management LLC | 17,645 | $1.26M | 0.01% | −16,850−48.8% | Reduced |
| Bellwether Advisors, LLC | 17,846 | $1.27M | 0.42% | +17,846 | New |
| Barclays PLC | 18,036 | $1.28M | 0.00% | +9,676+115.7% | Added |
| Gotham Asset Management, LLC | 18,173 | $1.29M | 0.05% | +12,836+240.5% | Added |
| American International Group, Inc. | 19,130 | $1.36M | 0.01% | +23+0.1% | Added |
| Alpha DNA Investment Management LLC | 19,389 | $1.38M | 0.97% | +19,389 | New |
| Advisory Research Inc | 19,684 | $1.40M | 0.09% | +19,684 | New |
| M&G Investment Management Ltd | 20,004 | $1.42M | 0.01% | +20,004 | New |
| Bank of Montreal | 21,525 | $1.56M | 0.00% | +21,525 | New |
| Ensign Peak Advisors, Inc | 22,162 | $1.58M | 0.00% | +4,534+25.7% | Added |
| New York Life Investments Alternatives | 24,849 | $1.77M | 1.15% | −7,255−22.6% | Reduced |
| Edgewood Management LLC | 25,000 | $1.78M | 0.00% | 00.0% | Unchanged |
| Credit Suisse AG | 25,232 | $1.80M | 0.00% | +2,803+12.5% | Added |
| New York State Common Retirement Fund | 26,360 | $1.88M | 0.00% | −3,750−12.5% | Reduced |
| Susquehanna International Group, LLP | 26,456 | $1.88M | 0.00% | +14,061+113.4% | Added |
| Tudor Investment Corp Et Al | 27,280 | $1.94M | 0.04% | −12,779−31.9% | Reduced |
| Jump Financial, LLC | 27,800 | $1.98M | 0.14% | +27,800 | New |
| Susquehanna Fundamental Investments, LLC | 30,150 | $2.15M | 0.04% | 00.0% | Unchanged |
| Principal Financial Group Inc | 31,575 | $2.25M | 0.00% | +46+0.1% | Added |
| Deutsche Bank AG | 31,648 | $2.25M | 0.00% | +10,036+46.4% | Added |
| D. E. Shaw & Co., Inc. | 33,321 | $2.37M | 0.00% | +13,026+64.2% | Added |
| Bank of America Corp | 33,574 | $2.39M | 0.00% | +17,431+108.0% | Added |
| Syntal Capital Partners, LLC | 33,615 | $2.39M | 0.83% | +33,615 | New |
| Marshall Wace North America L.P. | 34,755 | $2.47M | 0.01% | +34,755 | New |
| Birchview Capital, LP | 40,247 | $2.87M | 1.95% | +10,000+33.1% | Added |
| Rafferty Asset Management, LLC | 40,797 | $2.91M | 0.02% | +6,621+19.4% | Added |
| Cubist Systematic Strategies, LLC | 42,262 | $3.01M | 0.04% | +14,732+53.5% | Added |
| Massachusetts Financial Services Co | 42,706 | $3.04M | 0.00% | −562−1.3% | Reduced |
| ETF Managers Group, LLC | 43,230 | $3.06M | 0.06% | +43,230 | New |
| Jacobs Levy Equity Management, Inc | 43,227 | $3.08M | 0.02% | +43,227 | New |
| California State Teachers Retirement System | 44,191 | $3.15M | 0.00% | −2,831−6.0% | Reduced |
| Rhumbline Advisers | 44,414 | $3.16M | 0.00% | +1,975+4.7% | Added |
| State of New Jersey Common Pension Fund D | 44,541 | $3.17M | 0.01% | +44,541 | New |
| Alliancebernstein L.P. | 44,940 | $3.20M | 0.00% | −4,600−9.3% | Reduced |
| Granahan Investment Management Inc | 45,304 | $3.23M | 0.06% | +45,304 | New |
| RBF Capital, LLC | 45,362 | $3.23M | 0.18% | 00.0% | Unchanged |
| State of Wisconsin Investment Board | 45,800 | $3.26M | 0.01% | −3,200−6.5% | Reduced |
| EAM Global Investors LLC | 49,720 | $3.54M | 0.84% | −20,535−29.2% | Reduced |
| Citigroup Inc | 53,285 | $3.80M | 0.00% | −3,067−5.4% | Reduced |
| Alps Advisors Inc | 55,206 | $3.93M | 0.04% | −2,674−4.6% | Reduced |
| Wells Fargo & Company | 56,331 | $4.01M | 0.00% | +41,215+272.7% | Added |
| DCF Advisers, LLC | 60,000 | $4.27M | 2.32% | −1,750−2.8% | Reduced |
| Platinum Investment Management Ltd | 60,512 | $4.31M | 0.12% | −41,393−40.6% | Reduced |
| Morgan Stanley | 62,180 | $4.43M | 0.00% | +17,240+38.4% | Added |
| EAM Investors, LLC | 64,650 | $4.61M | 0.78% | −39,900−38.2% | Reduced |
| Swiss National Bank | 68,300 | $4.87M | 0.00% | +6,700+10.9% | Added |
| Marshall Wace, LLP | 68,892 | $4.91M | 0.02% | +68,892 | New |
| Goldman Sachs Group Inc | 75,909 | $5.41M | 0.00% | +2,645+3.6% | Added |
| UBS Group AG | 77,517 | $5.52M | 0.00% | +75,855+4,564.1% | Added |
| Hillsdale Investment Management Inc. | 93,500 | $6.66M | 0.51% | +41,700+80.5% | Added |
| Adage Capital Partners GP, L.L.C. | 100,000 | $7.12M | 0.01% | −100,000−50.0% | Reduced |
| Perceptive Advisors LLC | 100,000 | $7.12M | 0.10% | 00.0% | Unchanged |
| Citadel Advisors LLC | 103,505 | $7.37M | 0.01% | +103,505 | New |
| Handelsbanken Fonder AB | 109,700 | $7.81M | 0.04% | +10,000+10.0% | Added |
| SG Americas Securities, LLC | 116,076 | $8.27M | 0.05% | +106,056+1,058.4% | Added |
| Parametric Portfolio Associates LLC | 124,221 | $8.85M | 0.01% | +30,344+32.3% | Added |
| Federated Hermes, Inc. | 124,667 | $8.88M | 0.02% | +80,996+185.5% | Added |
| TD Asset Management Inc | 126,894 | $9.04M | 0.01% | +4,125+3.4% | Added |
| Voloridge Investment Management, LLC | 127,257 | $9.06M | 0.06% | +51,596+68.2% | Added |
| Bank of New York Mellon Corp | 137,287 | $9.78M | 0.00% | +1,832+1.4% | Added |
| Prudential Financial Inc | 144,449 | $10.3M | 0.01% | +87,270+152.6% | Added |
| Millennium Management LLC | 151,669 | $10.8M | 0.01% | +63,725+72.5% | Added |
| Pinnacle Associates Ltd | 151,776 | $10.8M | 0.20% | −54,142−26.3% | Reduced |
| Point72 Asset Management, L.P. | 161,900 | $11.5M | 0.05% | −6,900−4.1% | Reduced |
| Atika Capital Management LLC | 224,600 | $16.0M | 1.14% | −9,400−4.0% | Reduced |
| Charles Schwab Investment Management Inc | 241,715 | $17.2M | 0.01% | +34,889+16.9% | Added |
| Renaissance Technologies LLC | 257,200 | $18.3M | 0.02% | +18,900+7.9% | Added |
| UBS Asset Management Americas Inc | 279,823 | $19.9M | 0.01% | −122,345−30.4% | Reduced |
| Boxer Capital, LLC | 300,000 | $21.4M | 0.75% | +300,000 | New |
| Two Sigma Investments, LP | 321,166 | $22.9M | 0.06% | −15,824−4.7% | Reduced |
| Prosight Management, LP | 323,300 | $23.0M | 13.47% | −98,700−23.4% | Reduced |
| Invesco Ltd. | 347,424 | $24.7M | 0.01% | +51,565+17.4% | Added |
| Northern Trust Corp | 440,985 | $31.4M | 0.01% | −299−0.1% | Reduced |
| Two Sigma Advisers, LP | 473,700 | $33.7M | 0.09% | +51,400+12.2% | Added |
| Nuveen Asset Management, LLC | 479,395 | $34.1M | 0.01% | +29,404+6.5% | Added |
| Geode Capital Management, LLC | 620,173 | $44.2M | 0.01% | +56,817+10.1% | Added |
| Rock Springs Capital Management LP | 710,430 | $50.6M | 1.06% | −239,661−25.2% | Reduced |
| Vanguard Group Inc | 868,478 | $61.9M | 0.00% | +187,382+27.5% | Added |
| Redmile Group, LLC | 901,491 | $64.2M | 1.12% | −314,166−25.8% | Reduced |
| State Street Corp | 1,405,244 | $100.1M | 0.01% | +176,765+14.4% | Added |
| First Light Asset Management, LLC | 1,449,494 | $103.2M | 6.80% | −478,335−24.8% | Reduced |
| Dimensional Fund Advisors LP | 1,579,648 | $112.5M | 0.04% | −5,713−0.4% | Reduced |
| Palo Alto Investors LP | 1,685,282 | $120.0M | 7.25% | −46,200−2.7% | Reduced |
| FMR LLC | 2,649,431 | $188.7M | 0.01% | −128,856−4.6% | Reduced |
| BlackRock Inc. | 3,769,704 | $268.5M | 0.01% | +87,856+2.4% | Added |
| Price T Rowe Associates Inc | 6,062,629 | $431.8M | 0.04% | +239,544+4.1% | Added |
| EcoR1 Capital, LLC | 11,284,280 | $803.8M | 28.39% | 00.0% | Unchanged |
| Gerber Kawasaki Wealth & Investment Management | 1 | – | – | +1 | New |
| Avidity Partners Management LP | 0 | $0 | 0.00% | −182,000−100.0% | Sold out |
| AXA S.A. | 0 | $0 | 0.00% | −79,660−100.0% | Sold out |
| ClariVest Asset Management LLC | 0 | $0 | 0.00% | −28,733−100.0% | Sold out |
| Squarepoint Ops LLC | 0 | $0 | 0.00% | −25,886−100.0% | Sold out |
| Wellington Management Group LLP | 0 | $0 | 0.00% | −23,821−100.0% | Sold out |
| Virtu Financial LLC | 0 | $0 | 0.00% | −11,174−100.0% | Sold out |
| Trexquant Investment LP | 0 | $0 | 0.00% | −7,326−100.0% | Sold out |
| Maven Securities LTD | 0 | $0 | 0.00% | −5,000−100.0% | Sold out |