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, Q4 2021
Institutional positions in Prothena Corp Public Ltd Co as of Dec 31, 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
- 196
- +5 vs. Q3 2021
- Shares held
- 42.8M
- +1.95M (+4.8%) vs. Q3 2021
- Total value
- $2.12B
- −$796.5M (−27.3%) vs. Q3 2021
- New holders
- 41
- 72 more added
- Sold out
- 36
- 37 more reduced
1 institution that held it in Q3 2021 haven't filed for Q4 2021 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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, Q4 2021
Shares, value and share of portfolio for each institution holding Prothena Corp Public Ltd Co; share changes are against Q3 2021.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| EcoR1 Capital, LLC | 11,284,280 | $557.4M | 17.85% | 00.0% | Unchanged |
| Price T Rowe Associates Inc | 5,948,861 | $293.9M | 0.03% | −113,768−1.9% | Reduced |
| BlackRock Inc. | 3,872,300 | $191.3M | 0.00% | +102,596+2.7% | Added |
| FMR LLC | 2,641,741 | $130.5M | 0.01% | −7,690−0.3% | Reduced |
| State Street Corp | 1,972,950 | $97.5M | 0.00% | +567,706+40.4% | Added |
| Palo Alto Investors LP | 1,685,282 | $83.3M | 5.32% | 00.0% | Unchanged |
| First Light Asset Management, LLC | 1,622,941 | $80.2M | 5.74% | +173,447+12.0% | Added |
| Dimensional Fund Advisors LP | 1,498,537 | $74.0M | 0.02% | −81,111−5.1% | Reduced |
| Vanguard Group Inc | 901,204 | $44.5M | 0.00% | +32,726+3.8% | Added |
| Redmile Group, LLC | 765,675 | $37.8M | 0.86% | −135,816−15.1% | Reduced |
| Rock Springs Capital Management LP | 647,730 | $32.0M | 0.74% | −62,700−8.8% | Reduced |
| Geode Capital Management, LLC | 623,574 | $30.8M | 0.00% | +3,401+0.5% | Added |
| Nuveen Asset Management, LLC | 498,164 | $24.6M | 0.01% | +18,769+3.9% | Added |
| Northern Trust Corp | 444,819 | $22.0M | 0.00% | +3,834+0.9% | Added |
| Prosight Management, LP | 441,000 | $21.8M | 14.50% | +117,700+36.4% | Added |
| Two Sigma Advisers, LP | 408,400 | $20.2M | 0.05% | −65,300−13.8% | Reduced |
| Two Sigma Investments, LP | 301,454 | $14.9M | 0.04% | −19,712−6.1% | Reduced |
| Boxer Capital, LLC | 300,000 | $14.8M | 0.59% | 00.0% | Unchanged |
| Renaissance Technologies LLC | 266,800 | $13.2M | 0.02% | +9,600+3.7% | Added |
| UBS Asset Management Americas Inc | 259,974 | $12.8M | 0.00% | −19,849−7.1% | Reduced |
| Charles Schwab Investment Management Inc | 255,614 | $12.6M | 0.00% | +13,899+5.8% | Added |
| Millennium Management LLC | 219,891 | $10.9M | 0.01% | +68,222+45.0% | Added |
| JPMorgan Chase & Co | 215,342 | $10.6M | 0.00% | +201,056+1,407.4% | Added |
| Marshall Wace, LLP | 214,691 | $10.6M | 0.02% | +145,799+211.6% | Added |
| Goldman Sachs Group Inc | 214,116 | $10.6M | 0.00% | +138,207+182.1% | Added |
| Point72 Asset Management, L.P. | 193,200 | $9.54M | 0.04% | +31,300+19.3% | Added |
| Morgan Stanley | 179,531 | $8.87M | 0.00% | +117,351+188.7% | Added |
| Jacobs Levy Equity Management, Inc | 177,294 | $8.76M | 0.06% | +134,067+310.1% | Added |
| Bank of America Corp | 168,502 | $8.32M | 0.00% | +134,928+401.9% | Added |
| TD Asset Management Inc | 163,217 | $8.06M | 0.01% | +36,323+28.6% | Added |
| ExodusPoint Capital Management, LP | 162,858 | $8.04M | 0.10% | +162,858 | New |
| Invesco Ltd. | 157,820 | $7.80M | 0.00% | −189,604−54.6% | Reduced |
| SG Americas Securities, LLC | 154,843 | $7.65M | 0.05% | +38,767+33.4% | Added |
| Bank of New York Mellon Corp | 152,460 | $7.53M | 0.00% | +15,173+11.1% | Added |
| Pinnacle Associates Ltd | 151,214 | $7.47M | 0.13% | −562−0.4% | Reduced |
| Voloridge Investment Management, LLC | 145,551 | $7.19M | 0.04% | +18,294+14.4% | Added |
| Federated Hermes, Inc. | 120,929 | $5.97M | 0.01% | −3,738−3.0% | Reduced |
| Rafferty Asset Management, LLC | 120,668 | $5.96M | 0.03% | +79,871+195.8% | Added |
| D. E. Shaw & Co., Inc. | 112,065 | $5.54M | 0.01% | +78,744+236.3% | Added |
| Citigroup Inc | 100,288 | $4.95M | 0.00% | +47,003+88.2% | Added |
| Perceptive Advisors LLC | 100,000 | $4.94M | 0.08% | 00.0% | Unchanged |
| Parametric Portfolio Associates LLC | 99,138 | $4.90M | 0.00% | −25,083−20.2% | Reduced |
| Handelsbanken Fonder AB | 98,400 | $4.86M | 0.02% | −11,300−10.3% | Reduced |
| Allspring Global Investments Holdings, LLC | 97,332 | $4.81M | 0.01% | +97,332 | New |
| Hillsdale Investment Management Inc. | 93,500 | $4.62M | 0.31% | 00.0% | Unchanged |
| Wellington Management Group LLP | 93,339 | $4.61M | 0.00% | +93,339 | New |
| Granahan Investment Management Inc | 90,179 | $4.46M | 0.09% | +44,875+99.1% | Added |
| Susquehanna International Group, LLP | 88,806 | $4.39M | 0.01% | +62,350+235.7% | Added |
| First Trust Advisors LP | 77,148 | $3.81M | 0.00% | +77,148 | New |
| Norges Bank | 76,800 | $3.79M | 0.00% | +76,800 | New |
| Prudential Financial Inc | 76,569 | $3.78M | 0.00% | −67,880−47.0% | Reduced |
| UBS Group AG | 74,372 | $3.67M | 0.00% | −3,145−4.1% | Reduced |
| Swiss National Bank | 69,400 | $3.43M | 0.00% | +1,100+1.6% | Added |
| Platinum Investment Management Ltd | 60,512 | $2.99M | 0.08% | 00.0% | Unchanged |
| Goldstream Capital Management Ltd | 60,321 | $2.98M | 0.73% | +60,321 | New |
| DCF Advisers, LLC | 60,000 | $2.96M | 1.49% | 00.0% | Unchanged |
| Alps Advisors Inc | 53,918 | $2.66M | 0.03% | −1,288−2.3% | Reduced |
| Healthcare of Ontario Pension Plan Trust Fund | 52,800 | $2.61M | 0.01% | +52,800 | New |
| Capital Fund Management S.A. | 52,063 | $2.57M | 0.07% | +52,063 | New |
| Barclays PLC | 48,880 | $2.42M | 0.00% | +30,844+171.0% | Added |
| State of New Jersey Common Pension Fund D | 47,823 | $2.36M | 0.01% | +3,282+7.4% | Added |
| State of Wisconsin Investment Board | 47,200 | $2.33M | 0.00% | +1,400+3.1% | Added |
| California State Teachers Retirement System | 46,432 | $2.29M | 0.00% | +2,241+5.1% | Added |
| Bank of Montreal | 47,546 | $2.28M | 0.00% | +26,021+120.9% | Added |
| RBF Capital, LLC | 45,362 | $2.24M | 0.14% | 00.0% | Unchanged |
| Rhumbline Advisers | 44,423 | $2.19M | 0.00% | +90.0% | Added |
| Alliancebernstein L.P. | 44,300 | $2.19M | 0.00% | −640−1.4% | Reduced |
| Cubist Systematic Strategies, LLC | 42,605 | $2.10M | 0.02% | +343+0.8% | Added |
| Massachusetts Financial Services Co | 41,858 | $2.07M | 0.00% | −848−2.0% | Reduced |
| Principal Financial Group Inc | 40,525 | $2.00M | 0.00% | +8,950+28.3% | Added |
| Birchview Capital, LP | 40,247 | $1.99M | 1.28% | 00.0% | Unchanged |
| Jump Financial, LLC | 39,000 | $1.93M | 0.12% | +11,200+40.3% | Added |
| Ensign Peak Advisors, Inc | 38,997 | $1.93M | 0.00% | +16,835+76.0% | Added |
| Wells Fargo & Company | 38,188 | $1.89M | 0.00% | −18,143−32.2% | Reduced |
| Verition Fund Management LLC | 35,878 | $1.77M | 0.02% | +35,878 | New |
| Gotham Asset Management, LLC | 34,658 | $1.71M | 0.06% | +16,485+90.7% | Added |
| New York Life Investments Alternatives | 33,212 | $1.64M | 1.10% | +8,363+33.7% | Added |
| New York State Common Retirement Fund | 30,781 | $1.52M | 0.00% | +4,421+16.8% | Added |
| HighVista Strategies LLC | 28,078 | $1.39M | 1.10% | +28,078 | New |
| Citadel Advisors LLC | 27,693 | $1.37M | 0.00% | −75,812−73.2% | Reduced |
| Edgewood Management LLC | 25,000 | $1.24M | 0.00% | 00.0% | Unchanged |
| Deutsche Bank AG | 24,624 | $1.22M | 0.00% | −7,024−22.2% | Reduced |
| Russell Investments Group, Ltd. | 23,711 | $1.17M | 0.00% | +20,215+578.2% | Added |
| Credit Suisse AG | 23,572 | $1.17M | 0.00% | −1,660−6.6% | Reduced |
| Robeco Institutional Asset Management B.V. | 21,932 | $1.08M | 0.00% | +4,972+29.3% | Added |
| Thrivent Financial for Lutherans | 20,870 | $1.03M | 0.00% | +20,870 | New |
| Qube Research & Technologies Ltd | 19,833 | $980.0K | 0.01% | +19,833 | New |
| Susquehanna Fundamental Investments, LLC | 19,290 | $953.0K | 0.02% | −10,860−36.0% | Reduced |
| American International Group, Inc. | 19,212 | $949.0K | 0.00% | +82+0.4% | Added |
| Jennison Associates LLC | 18,631 | $920.0K | 0.00% | +4,360+30.6% | Added |
| Manufacturers Life Insurance Company, The | 17,366 | $858.0K | 0.00% | +83+0.5% | Added |
| Allianz Asset Management GmbH | 16,595 | $815.0K | 0.00% | +16,595 | New |
| STRS Ohio | 16,400 | $810.0K | 0.00% | +2,700+19.7% | Added |
| State Board of Administration of Florida Retirement System | 16,066 | $794.0K | 0.00% | −145−0.9% | Reduced |
| Hussman Strategic Advisors, Inc. | 15,600 | $771.0K | 0.17% | +15,600 | New |
| Aviva PLC | 15,595 | $770.0K | 0.00% | +15,595 | New |
| Royal Bank of Canada | 15,302 | $756.0K | 0.00% | +2,280+17.5% | Added |
| International Biotechnology Trust PLC | 15,000 | $741.0K | 0.17% | +15,000 | New |
| ProShare Advisors LLC | 14,456 | $715.0K | 0.00% | +355+2.5% | Added |
| Legal & General Group Plc | 14,448 | $713.0K | 0.00% | +366+2.6% | Added |