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, Q1 2022
Institutional positions in Prothena Corp Public Ltd Co as of Mar 31, 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
- 174
- −19 vs. Q4 2021
- Shares held
- 44.1M
- +1.28M (+3.0%) vs. Q4 2021
- Total value
- $1.61B
- −$502.5M (−23.7%) vs. Q4 2021
- New holders
- 18
- 56 more added
- Sold out
- 37
- 54 more reduced
3 institutions that held it in Q4 2021 haven't filed for Q1 2022 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 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, Q1 2022
Shares, value and share of portfolio for each institution holding Prothena Corp Public Ltd Co; share changes are against Q4 2021.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| EcoR1 Capital, LLC | 11,584,280 | $423.6M | 13.28% | +300,000+2.7% | Added |
| Price T Rowe Associates Inc | 6,113,742 | $223.6M | 0.02% | +164,881+2.8% | Added |
| BlackRock Inc. | 3,861,586 | $141.2M | 0.00% | −10,714−0.3% | Reduced |
| FMR LLC | 2,675,614 | $97.8M | 0.01% | +33,873+1.3% | Added |
| State Street Corp | 2,367,583 | $86.6M | 0.00% | +394,633+20.0% | Added |
| First Light Asset Management, LLC | 1,838,548 | $67.2M | 5.93% | +215,607+13.3% | Added |
| Palo Alto Investors LP | 1,681,477 | $61.5M | 4.75% | −3,805−0.2% | Reduced |
| Dimensional Fund Advisors LP | 1,505,156 | $55.0M | 0.02% | +6,619+0.4% | Added |
| Vanguard Group Inc | 875,300 | $32.0M | 0.00% | −25,904−2.9% | Reduced |
| Nuveen Asset Management, LLC | 723,989 | $27.3M | 0.01% | +225,825+45.3% | Added |
| Redmile Group, LLC | 736,175 | $26.9M | 0.84% | −29,500−3.9% | Reduced |
| Rock Springs Capital Management LP | 663,530 | $24.3M | 0.61% | +15,800+2.4% | Added |
| Geode Capital Management, LLC | 651,975 | $23.8M | 0.00% | +28,401+4.6% | Added |
| Prosight Management, LP | 566,538 | $20.7M | 14.58% | +125,538+28.5% | Added |
| Two Sigma Advisers, LP | 416,200 | $15.2M | 0.04% | +7,800+1.9% | Added |
| Renaissance Technologies LLC | 394,200 | $14.4M | 0.02% | +127,400+47.8% | Added |
| Northern Trust Corp | 364,792 | $13.3M | 0.00% | −80,027−18.0% | Reduced |
| Morgan Stanley | 349,521 | $12.8M | 0.00% | +169,990+94.7% | Added |
| Maple Rock Capital Partners Inc. | 334,000 | $12.2M | 1.35% | +334,000 | New |
| Boxer Capital, LLC | 300,000 | $11.0M | 0.56% | 00.0% | Unchanged |
| Charles Schwab Investment Management Inc | 284,402 | $10.4M | 0.00% | +28,788+11.3% | Added |
| Millennium Management LLC | 272,675 | $9.97M | 0.01% | +52,784+24.0% | Added |
| Paradigm Biocapital Advisors LP | 267,946 | $9.80M | 2.59% | +267,946 | New |
| Two Sigma Investments, LP | 261,291 | $9.55M | 0.03% | −40,163−13.3% | Reduced |
| UBS Asset Management Americas Inc | 259,974 | $9.51M | 0.00% | 00.0% | Unchanged |
| Goldman Sachs Group Inc | 258,563 | $9.46M | 0.00% | +44,447+20.8% | Added |
| JPMorgan Chase & Co | 252,140 | $9.22M | 0.00% | +36,798+17.1% | Added |
| Invesco Ltd. | 191,223 | $6.99M | 0.00% | +33,403+21.2% | Added |
| Sessa Capital IM, L.P. | 187,000 | $6.84M | 0.42% | +187,000 | New |
| Point72 Asset Management, L.P. | 173,000 | $6.33M | 0.03% | −20,200−10.5% | Reduced |
| Bank of America Corp | 158,219 | $5.79M | 0.00% | −10,283−6.1% | Reduced |
| Bank of New York Mellon Corp | 154,281 | $5.64M | 0.00% | +1,821+1.2% | Added |
| Pinnacle Associates Ltd | 144,834 | $5.30M | 0.09% | −6,380−4.2% | Reduced |
| Rafferty Asset Management, LLC | 143,547 | $5.25M | 0.03% | +22,879+19.0% | Added |
| SG Americas Securities, LLC | 143,506 | $5.25M | 0.05% | −11,337−7.3% | Reduced |
| TD Asset Management Inc | 129,141 | $4.72M | 0.00% | −34,076−20.9% | Reduced |
| Granahan Investment Management Inc | 124,106 | $4.54M | 0.11% | +33,927+37.6% | Added |
| Capital Fund Management S.A. | 120,393 | $4.40M | 0.12% | +68,330+131.2% | Added |
| Federated Hermes, Inc. | 101,229 | $3.70M | 0.01% | −19,700−16.3% | Reduced |
| Handelsbanken Fonder AB | 98,400 | $3.60M | 0.02% | 00.0% | Unchanged |
| Wellington Management Group LLP | 93,486 | $3.42M | 0.00% | +147+0.2% | Added |
| D. E. Shaw & Co., Inc. | 87,153 | $3.19M | 0.00% | −24,912−22.2% | Reduced |
| Swiss National Bank | 77,200 | $2.82M | 0.00% | +7,800+11.2% | Added |
| Norges Bank | 76,800 | $2.81M | 0.00% | 00.0% | Unchanged |
| DCF Advisers, LLC | 76,000 | $2.78M | 1.63% | +16,000+26.7% | Added |
| Mariner, LLC | 74,130 | $2.71M | 0.01% | +60,144+430.0% | Added |
| Prudential Financial Inc | 72,309 | $2.65M | 0.00% | −4,260−5.6% | Reduced |
| ExodusPoint Capital Management, LP | 70,702 | $2.59M | 0.04% | −92,156−56.6% | Reduced |
| Perceptive Advisors LLC | 65,144 | $2.38M | 0.05% | −34,856−34.9% | Reduced |
| Platinum Investment Management Ltd | 60,512 | $2.21M | 0.07% | 00.0% | Unchanged |
| Manufacturers Life Insurance Company, The | 54,643 | $2.00M | 0.00% | +37,277+214.7% | Added |
| Ensign Peak Advisors, Inc | 49,877 | $1.82M | 0.00% | +10,880+27.9% | Added |
| Bank of Montreal | 47,546 | $1.80M | 0.00% | 00.0% | Unchanged |
| Susquehanna International Group, LLP | 49,186 | $1.80M | 0.00% | −39,620−44.6% | Reduced |
| First Trust Advisors LP | 49,067 | $1.79M | 0.00% | −28,081−36.4% | Reduced |
| UBS Group AG | 48,419 | $1.77M | 0.00% | −25,953−34.9% | Reduced |
| State of Wisconsin Investment Board | 48,400 | $1.77M | 0.00% | +1,200+2.5% | Added |
| Alps Advisors Inc | 47,982 | $1.75M | 0.02% | −5,936−11.0% | Reduced |
| Parametric Portfolio Associates LLC | 47,032 | $1.72M | 0.00% | −52,106−52.6% | Reduced |
| RBF Capital, LLC | 45,362 | $1.66M | 0.11% | 00.0% | Unchanged |
| Alliancebernstein L.P. | 44,400 | $1.62M | 0.00% | +100+0.2% | Added |
| Citadel Advisors LLC | 43,515 | $1.59M | 0.00% | +15,822+57.1% | Added |
| California State Teachers Retirement System | 43,235 | $1.58M | 0.00% | −3,197−6.9% | Reduced |
| Rhumbline Advisers | 42,313 | $1.55M | 0.00% | −2,110−4.7% | Reduced |
| Birchview Capital, LP | 41,978 | $1.53M | 1.11% | +1,731+4.3% | Added |
| New York Life Investments Alternatives | 41,735 | $1.53M | 1.06% | +8,523+25.7% | Added |
| New York State Common Retirement Fund | 40,073 | $1.47M | 0.00% | +9,292+30.2% | Added |
| AXA S.A. | 35,100 | $1.28M | 0.00% | +35,100 | New |
| Gsa Capital Partners LLP | 31,142 | $1.14M | 0.15% | +17,883+134.9% | Added |
| Principal Financial Group Inc | 30,573 | $1.12M | 0.00% | −9,952−24.6% | Reduced |
| Ameriprise Financial Inc | 28,256 | $1.03M | 0.00% | +13,836+96.0% | Added |
| Credit Suisse AG | 27,355 | $1.00M | 0.00% | +3,783+16.0% | Added |
| Wells Fargo & Company | 27,283 | $997.0K | 0.00% | −10,905−28.6% | Reduced |
| Allspring Global Investments Holdings, LLC | 25,799 | $943.0K | 0.00% | −71,533−73.5% | Reduced |
| Gotham Asset Management, LLC | 25,784 | $943.0K | 0.03% | −8,874−25.6% | Reduced |
| Citigroup Inc | 25,585 | $937.0K | 0.00% | −74,703−74.5% | Reduced |
| Edgewood Management LLC | 25,000 | $914.0K | 0.00% | 00.0% | Unchanged |
| Jennison Associates LLC | 24,045 | $879.0K | 0.00% | +5,414+29.1% | Added |
| Deutsche Bank AG | 22,344 | $817.0K | 0.00% | −2,280−9.3% | Reduced |
| Engineers Gate Manager LP | 21,992 | $804.0K | 0.03% | +21,992 | New |
| MetLife Investment Management | 19,561 | $715.3K | 0.00% | +6,951+55.1% | Added |
| Twinbeech Capital LP | 18,374 | $672.0K | 0.03% | +18,374 | New |
| American International Group, Inc. | 17,948 | $656.0K | 0.00% | −1,264−6.6% | Reduced |
| Algert Global LLC | 16,875 | $617.0K | 0.04% | +16,875 | New |
| Healthcare of Ontario Pension Plan Trust Fund | 16,800 | $614.0K | 0.00% | −36,000−68.2% | Reduced |
| Allianz Asset Management GmbH | 16,595 | $607.0K | 0.00% | 00.0% | Unchanged |
| STRS Ohio | 16,400 | $599.0K | 0.00% | 00.0% | Unchanged |
| State Board of Administration of Florida Retirement System | 16,066 | $588.0K | 0.00% | 00.0% | Unchanged |
| Hussman Strategic Advisors, Inc. | 15,600 | $570.0K | 0.11% | 00.0% | Unchanged |
| AlphaCrest Capital Management LLC | 15,348 | $561.0K | 0.03% | +15,348 | New |
| Legal & General Group Plc | 14,675 | $537.0K | 0.00% | +227+1.6% | Added |
| Voya Investment Management LLC | 14,295 | $523.0K | 0.00% | +666+4.9% | Added |
| DekaBank Deutsche Girozentrale | 14,000 | $511.0K | 0.00% | +1,300+10.2% | Added |
| Massachusetts Financial Services Co | 13,556 | $496.0K | 0.00% | −28,302−67.6% | Reduced |
| Virginia Retirement Systems Et Al | 13,400 | $490.0K | 0.00% | +5,900+78.7% | Added |
| HighVista Strategies LLC | 12,953 | $474.0K | 0.30% | −15,125−53.9% | Reduced |
| Victory Capital Management Inc | 15,410 | $449.0K | 0.00% | +7,273+89.4% | Added |
| Putnam Investments LLC | 12,147 | $444.0K | 0.00% | +618+5.4% | Added |
| ProShare Advisors LLC | 11,609 | $424.0K | 0.00% | −2,847−19.7% | Reduced |
| NinePointTwo Capital | 11,474 | $419.0K | 0.11% | +5,302+85.9% | Added |