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 |
|---|---|---|---|---|---|
| Aviva PLC | 15,595 | $770.0K | 0.00% | +15,595 | New |
| Hussman Strategic Advisors, Inc. | 15,600 | $771.0K | 0.17% | +15,600 | New |
| State Board of Administration of Florida Retirement System | 16,066 | $794.0K | 0.00% | −145−0.9% | Reduced |
| STRS Ohio | 16,400 | $810.0K | 0.00% | +2,700+19.7% | Added |
| Allianz Asset Management GmbH | 16,595 | $815.0K | 0.00% | +16,595 | New |
| Manufacturers Life Insurance Company, The | 17,366 | $858.0K | 0.00% | +83+0.5% | Added |
| Jennison Associates LLC | 18,631 | $920.0K | 0.00% | +4,360+30.6% | Added |
| American International Group, Inc. | 19,212 | $949.0K | 0.00% | +82+0.4% | Added |
| Susquehanna Fundamental Investments, LLC | 19,290 | $953.0K | 0.02% | −10,860−36.0% | Reduced |
| Qube Research & Technologies Ltd | 19,833 | $980.0K | 0.01% | +19,833 | New |
| Thrivent Financial for Lutherans | 20,870 | $1.03M | 0.00% | +20,870 | New |
| Robeco Institutional Asset Management B.V. | 21,932 | $1.08M | 0.00% | +4,972+29.3% | Added |
| Credit Suisse AG | 23,572 | $1.17M | 0.00% | −1,660−6.6% | Reduced |
| Russell Investments Group, Ltd. | 23,711 | $1.17M | 0.00% | +20,215+578.2% | Added |
| Deutsche Bank AG | 24,624 | $1.22M | 0.00% | −7,024−22.2% | Reduced |
| Edgewood Management LLC | 25,000 | $1.24M | 0.00% | 00.0% | Unchanged |
| Citadel Advisors LLC | 27,693 | $1.37M | 0.00% | −75,812−73.2% | Reduced |
| HighVista Strategies LLC | 28,078 | $1.39M | 1.10% | +28,078 | New |
| New York State Common Retirement Fund | 30,781 | $1.52M | 0.00% | +4,421+16.8% | Added |
| New York Life Investments Alternatives | 33,212 | $1.64M | 1.10% | +8,363+33.7% | Added |
| Gotham Asset Management, LLC | 34,658 | $1.71M | 0.06% | +16,485+90.7% | Added |
| Verition Fund Management LLC | 35,878 | $1.77M | 0.02% | +35,878 | New |
| Wells Fargo & Company | 38,188 | $1.89M | 0.00% | −18,143−32.2% | Reduced |
| 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 |
| Birchview Capital, LP | 40,247 | $1.99M | 1.28% | 00.0% | Unchanged |
| Principal Financial Group Inc | 40,525 | $2.00M | 0.00% | +8,950+28.3% | Added |
| Massachusetts Financial Services Co | 41,858 | $2.07M | 0.00% | −848−2.0% | Reduced |
| Cubist Systematic Strategies, LLC | 42,605 | $2.10M | 0.02% | +343+0.8% | Added |
| Alliancebernstein L.P. | 44,300 | $2.19M | 0.00% | −640−1.4% | Reduced |
| Rhumbline Advisers | 44,423 | $2.19M | 0.00% | +90.0% | Added |
| RBF Capital, LLC | 45,362 | $2.24M | 0.14% | 00.0% | Unchanged |
| Bank of Montreal | 47,546 | $2.28M | 0.00% | +26,021+120.9% | Added |
| California State Teachers Retirement System | 46,432 | $2.29M | 0.00% | +2,241+5.1% | Added |
| State of Wisconsin Investment Board | 47,200 | $2.33M | 0.00% | +1,400+3.1% | Added |
| State of New Jersey Common Pension Fund D | 47,823 | $2.36M | 0.01% | +3,282+7.4% | Added |
| Barclays PLC | 48,880 | $2.42M | 0.00% | +30,844+171.0% | Added |
| Capital Fund Management S.A. | 52,063 | $2.57M | 0.07% | +52,063 | New |
| Healthcare of Ontario Pension Plan Trust Fund | 52,800 | $2.61M | 0.01% | +52,800 | New |
| Alps Advisors Inc | 53,918 | $2.66M | 0.03% | −1,288−2.3% | Reduced |
| DCF Advisers, LLC | 60,000 | $2.96M | 1.49% | 00.0% | Unchanged |
| Goldstream Capital Management Ltd | 60,321 | $2.98M | 0.73% | +60,321 | New |
| Platinum Investment Management Ltd | 60,512 | $2.99M | 0.08% | 00.0% | Unchanged |
| Swiss National Bank | 69,400 | $3.43M | 0.00% | +1,100+1.6% | Added |
| UBS Group AG | 74,372 | $3.67M | 0.00% | −3,145−4.1% | Reduced |
| Prudential Financial Inc | 76,569 | $3.78M | 0.00% | −67,880−47.0% | Reduced |
| Norges Bank | 76,800 | $3.79M | 0.00% | +76,800 | New |
| First Trust Advisors LP | 77,148 | $3.81M | 0.00% | +77,148 | New |
| Susquehanna International Group, LLP | 88,806 | $4.39M | 0.01% | +62,350+235.7% | Added |
| Granahan Investment Management Inc | 90,179 | $4.46M | 0.09% | +44,875+99.1% | Added |
| Wellington Management Group LLP | 93,339 | $4.61M | 0.00% | +93,339 | New |
| Hillsdale Investment Management Inc. | 93,500 | $4.62M | 0.31% | 00.0% | Unchanged |
| Allspring Global Investments Holdings, LLC | 97,332 | $4.81M | 0.01% | +97,332 | New |
| Handelsbanken Fonder AB | 98,400 | $4.86M | 0.02% | −11,300−10.3% | Reduced |
| Parametric Portfolio Associates LLC | 99,138 | $4.90M | 0.00% | −25,083−20.2% | Reduced |
| Perceptive Advisors LLC | 100,000 | $4.94M | 0.08% | 00.0% | Unchanged |
| Citigroup Inc | 100,288 | $4.95M | 0.00% | +47,003+88.2% | Added |
| D. E. Shaw & Co., Inc. | 112,065 | $5.54M | 0.01% | +78,744+236.3% | Added |
| Rafferty Asset Management, LLC | 120,668 | $5.96M | 0.03% | +79,871+195.8% | Added |
| Federated Hermes, Inc. | 120,929 | $5.97M | 0.01% | −3,738−3.0% | Reduced |
| Voloridge Investment Management, LLC | 145,551 | $7.19M | 0.04% | +18,294+14.4% | Added |
| Pinnacle Associates Ltd | 151,214 | $7.47M | 0.13% | −562−0.4% | Reduced |
| Bank of New York Mellon Corp | 152,460 | $7.53M | 0.00% | +15,173+11.1% | Added |
| SG Americas Securities, LLC | 154,843 | $7.65M | 0.05% | +38,767+33.4% | Added |
| Invesco Ltd. | 157,820 | $7.80M | 0.00% | −189,604−54.6% | Reduced |
| ExodusPoint Capital Management, LP | 162,858 | $8.04M | 0.10% | +162,858 | New |
| TD Asset Management Inc | 163,217 | $8.06M | 0.01% | +36,323+28.6% | Added |
| Bank of America Corp | 168,502 | $8.32M | 0.00% | +134,928+401.9% | Added |
| Jacobs Levy Equity Management, Inc | 177,294 | $8.76M | 0.06% | +134,067+310.1% | Added |
| Morgan Stanley | 179,531 | $8.87M | 0.00% | +117,351+188.7% | Added |
| Point72 Asset Management, L.P. | 193,200 | $9.54M | 0.04% | +31,300+19.3% | Added |
| Goldman Sachs Group Inc | 214,116 | $10.6M | 0.00% | +138,207+182.1% | Added |
| Marshall Wace, LLP | 214,691 | $10.6M | 0.02% | +145,799+211.6% | Added |
| JPMorgan Chase & Co | 215,342 | $10.6M | 0.00% | +201,056+1,407.4% | Added |
| Millennium Management LLC | 219,891 | $10.9M | 0.01% | +68,222+45.0% | Added |
| Charles Schwab Investment Management Inc | 255,614 | $12.6M | 0.00% | +13,899+5.8% | Added |
| UBS Asset Management Americas Inc | 259,974 | $12.8M | 0.00% | −19,849−7.1% | Reduced |
| Renaissance Technologies LLC | 266,800 | $13.2M | 0.02% | +9,600+3.7% | Added |
| Boxer Capital, LLC | 300,000 | $14.8M | 0.59% | 00.0% | Unchanged |
| Two Sigma Investments, LP | 301,454 | $14.9M | 0.04% | −19,712−6.1% | Reduced |
| Two Sigma Advisers, LP | 408,400 | $20.2M | 0.05% | −65,300−13.8% | Reduced |
| Prosight Management, LP | 441,000 | $21.8M | 14.50% | +117,700+36.4% | Added |
| Northern Trust Corp | 444,819 | $22.0M | 0.00% | +3,834+0.9% | Added |
| Nuveen Asset Management, LLC | 498,164 | $24.6M | 0.01% | +18,769+3.9% | Added |
| Geode Capital Management, LLC | 623,574 | $30.8M | 0.00% | +3,401+0.5% | Added |
| Rock Springs Capital Management LP | 647,730 | $32.0M | 0.74% | −62,700−8.8% | Reduced |
| Redmile Group, LLC | 765,675 | $37.8M | 0.86% | −135,816−15.1% | Reduced |
| Vanguard Group Inc | 901,204 | $44.5M | 0.00% | +32,726+3.8% | Added |
| Dimensional Fund Advisors LP | 1,498,537 | $74.0M | 0.02% | −81,111−5.1% | Reduced |
| First Light Asset Management, LLC | 1,622,941 | $80.2M | 5.74% | +173,447+12.0% | Added |
| Palo Alto Investors LP | 1,685,282 | $83.3M | 5.32% | 00.0% | Unchanged |
| State Street Corp | 1,972,950 | $97.5M | 0.00% | +567,706+40.4% | Added |
| FMR LLC | 2,641,741 | $130.5M | 0.01% | −7,690−0.3% | Reduced |
| BlackRock Inc. | 3,872,300 | $191.3M | 0.00% | +102,596+2.7% | Added |
| Price T Rowe Associates Inc | 5,948,861 | $293.9M | 0.03% | −113,768−1.9% | Reduced |
| EcoR1 Capital, LLC | 11,284,280 | $557.4M | 17.85% | 00.0% | Unchanged |
| Atika Capital Management LLC | 0 | $0 | 0.00% | −224,600−100.0% | Sold out |
| Adage Capital Partners GP, L.L.C. | 0 | $0 | 0.00% | −100,000−100.0% | Sold out |
| EAM Investors, LLC | 0 | $0 | 0.00% | −64,650−100.0% | Sold out |
| EAM Global Investors LLC | 0 | $0 | 0.00% | −49,720−100.0% | Sold out |