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 5 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 |
|---|---|---|---|---|---|
| Credit Suisse AG | 27,355 | $1.00M | 0.00% | +3,783+16.0% | Added |
| Ameriprise Financial Inc | 28,256 | $1.03M | 0.00% | +13,836+96.0% | Added |
| Principal Financial Group Inc | 30,573 | $1.12M | 0.00% | −9,952−24.6% | Reduced |
| Gsa Capital Partners LLP | 31,142 | $1.14M | 0.15% | +17,883+134.9% | Added |
| AXA S.A. | 35,100 | $1.28M | 0.00% | +35,100 | New |
| New York State Common Retirement Fund | 40,073 | $1.47M | 0.00% | +9,292+30.2% | Added |
| New York Life Investments Alternatives | 41,735 | $1.53M | 1.06% | +8,523+25.7% | Added |
| Birchview Capital, LP | 41,978 | $1.53M | 1.11% | +1,731+4.3% | Added |
| Rhumbline Advisers | 42,313 | $1.55M | 0.00% | −2,110−4.7% | Reduced |
| California State Teachers Retirement System | 43,235 | $1.58M | 0.00% | −3,197−6.9% | Reduced |
| Citadel Advisors LLC | 43,515 | $1.59M | 0.00% | +15,822+57.1% | Added |
| Alliancebernstein L.P. | 44,400 | $1.62M | 0.00% | +100+0.2% | Added |
| RBF Capital, LLC | 45,362 | $1.66M | 0.11% | 00.0% | Unchanged |
| Parametric Portfolio Associates LLC | 47,032 | $1.72M | 0.00% | −52,106−52.6% | Reduced |
| Alps Advisors Inc | 47,982 | $1.75M | 0.02% | −5,936−11.0% | Reduced |
| State of Wisconsin Investment Board | 48,400 | $1.77M | 0.00% | +1,200+2.5% | Added |
| UBS Group AG | 48,419 | $1.77M | 0.00% | −25,953−34.9% | Reduced |
| First Trust Advisors LP | 49,067 | $1.79M | 0.00% | −28,081−36.4% | Reduced |
| Susquehanna International Group, LLP | 49,186 | $1.80M | 0.00% | −39,620−44.6% | Reduced |
| Bank of Montreal | 47,546 | $1.80M | 0.00% | 00.0% | Unchanged |
| Ensign Peak Advisors, Inc | 49,877 | $1.82M | 0.00% | +10,880+27.9% | Added |
| Manufacturers Life Insurance Company, The | 54,643 | $2.00M | 0.00% | +37,277+214.7% | Added |
| Platinum Investment Management Ltd | 60,512 | $2.21M | 0.07% | 00.0% | Unchanged |
| Perceptive Advisors LLC | 65,144 | $2.38M | 0.05% | −34,856−34.9% | Reduced |
| ExodusPoint Capital Management, LP | 70,702 | $2.59M | 0.04% | −92,156−56.6% | Reduced |
| Prudential Financial Inc | 72,309 | $2.65M | 0.00% | −4,260−5.6% | Reduced |
| Mariner, LLC | 74,130 | $2.71M | 0.01% | +60,144+430.0% | Added |
| DCF Advisers, LLC | 76,000 | $2.78M | 1.63% | +16,000+26.7% | Added |
| Norges Bank | 76,800 | $2.81M | 0.00% | 00.0% | Unchanged |
| Swiss National Bank | 77,200 | $2.82M | 0.00% | +7,800+11.2% | Added |
| D. E. Shaw & Co., Inc. | 87,153 | $3.19M | 0.00% | −24,912−22.2% | Reduced |
| Wellington Management Group LLP | 93,486 | $3.42M | 0.00% | +147+0.2% | Added |
| Handelsbanken Fonder AB | 98,400 | $3.60M | 0.02% | 00.0% | Unchanged |
| Federated Hermes, Inc. | 101,229 | $3.70M | 0.01% | −19,700−16.3% | Reduced |
| Capital Fund Management S.A. | 120,393 | $4.40M | 0.12% | +68,330+131.2% | Added |
| Granahan Investment Management Inc | 124,106 | $4.54M | 0.11% | +33,927+37.6% | Added |
| TD Asset Management Inc | 129,141 | $4.72M | 0.00% | −34,076−20.9% | Reduced |
| SG Americas Securities, LLC | 143,506 | $5.25M | 0.05% | −11,337−7.3% | Reduced |
| Rafferty Asset Management, LLC | 143,547 | $5.25M | 0.03% | +22,879+19.0% | Added |
| Pinnacle Associates Ltd | 144,834 | $5.30M | 0.09% | −6,380−4.2% | Reduced |
| Bank of New York Mellon Corp | 154,281 | $5.64M | 0.00% | +1,821+1.2% | Added |
| Bank of America Corp | 158,219 | $5.79M | 0.00% | −10,283−6.1% | Reduced |
| Point72 Asset Management, L.P. | 173,000 | $6.33M | 0.03% | −20,200−10.5% | Reduced |
| Sessa Capital IM, L.P. | 187,000 | $6.84M | 0.42% | +187,000 | New |
| Invesco Ltd. | 191,223 | $6.99M | 0.00% | +33,403+21.2% | Added |
| JPMorgan Chase & Co | 252,140 | $9.22M | 0.00% | +36,798+17.1% | Added |
| Goldman Sachs Group Inc | 258,563 | $9.46M | 0.00% | +44,447+20.8% | Added |
| UBS Asset Management Americas Inc | 259,974 | $9.51M | 0.00% | 00.0% | Unchanged |
| Two Sigma Investments, LP | 261,291 | $9.55M | 0.03% | −40,163−13.3% | Reduced |
| Paradigm Biocapital Advisors LP | 267,946 | $9.80M | 2.59% | +267,946 | New |
| Millennium Management LLC | 272,675 | $9.97M | 0.01% | +52,784+24.0% | Added |
| Charles Schwab Investment Management Inc | 284,402 | $10.4M | 0.00% | +28,788+11.3% | Added |
| Boxer Capital, LLC | 300,000 | $11.0M | 0.56% | 00.0% | Unchanged |
| Maple Rock Capital Partners Inc. | 334,000 | $12.2M | 1.35% | +334,000 | New |
| Morgan Stanley | 349,521 | $12.8M | 0.00% | +169,990+94.7% | Added |
| Northern Trust Corp | 364,792 | $13.3M | 0.00% | −80,027−18.0% | Reduced |
| Renaissance Technologies LLC | 394,200 | $14.4M | 0.02% | +127,400+47.8% | Added |
| Two Sigma Advisers, LP | 416,200 | $15.2M | 0.04% | +7,800+1.9% | Added |
| Prosight Management, LP | 566,538 | $20.7M | 14.58% | +125,538+28.5% | Added |
| Geode Capital Management, LLC | 651,975 | $23.8M | 0.00% | +28,401+4.6% | Added |
| Rock Springs Capital Management LP | 663,530 | $24.3M | 0.61% | +15,800+2.4% | Added |
| Redmile Group, LLC | 736,175 | $26.9M | 0.84% | −29,500−3.9% | Reduced |
| Nuveen Asset Management, LLC | 723,989 | $27.3M | 0.01% | +225,825+45.3% | Added |
| Vanguard Group Inc | 875,300 | $32.0M | 0.00% | −25,904−2.9% | Reduced |
| Dimensional Fund Advisors LP | 1,505,156 | $55.0M | 0.02% | +6,619+0.4% | Added |
| Palo Alto Investors LP | 1,681,477 | $61.5M | 4.75% | −3,805−0.2% | Reduced |
| First Light Asset Management, LLC | 1,838,548 | $67.2M | 5.93% | +215,607+13.3% | Added |
| State Street Corp | 2,367,583 | $86.6M | 0.00% | +394,633+20.0% | Added |
| FMR LLC | 2,675,614 | $97.8M | 0.01% | +33,873+1.3% | Added |
| BlackRock Inc. | 3,861,586 | $141.2M | 0.00% | −10,714−0.3% | Reduced |
| Price T Rowe Associates Inc | 6,113,742 | $223.6M | 0.02% | +164,881+2.8% | Added |
| EcoR1 Capital, LLC | 11,584,280 | $423.6M | 13.28% | +300,000+2.7% | Added |
| International Biotechnology Trust PLC | 15,000 | – | – | 00.0% | Unchanged |
| Advisor Group Holdings, Inc. | 316 | – | – | −54−14.6% | Reduced |
| Jacobs Levy Equity Management, Inc | 0 | $0 | 0.00% | −177,294−100.0% | Sold out |
| Voloridge Investment Management, LLC | 0 | $0 | 0.00% | −145,551−100.0% | Sold out |
| Hillsdale Investment Management Inc. | 0 | $0 | 0.00% | −93,500−100.0% | Sold out |
| Goldstream Capital Management Ltd | 0 | $0 | 0.00% | −60,321−100.0% | Sold out |
| State of New Jersey Common Pension Fund D | 0 | $0 | 0.00% | −47,823−100.0% | Sold out |
| Jump Financial, LLC | 0 | $0 | 0.00% | −39,000−100.0% | Sold out |
| Verition Fund Management LLC | 0 | $0 | 0.00% | −35,878−100.0% | Sold out |
| Russell Investments Group, Ltd. | 0 | $0 | 0.00% | −23,711−100.0% | Sold out |
| Robeco Institutional Asset Management B.V. | 0 | $0 | 0.00% | −21,932−100.0% | Sold out |
| Thrivent Financial for Lutherans | 0 | $0 | 0.00% | −20,870−100.0% | Sold out |
| Susquehanna Fundamental Investments, LLC | 0 | $0 | 0.00% | −19,290−100.0% | Sold out |
| Aviva PLC | 0 | $0 | 0.00% | −15,595−100.0% | Sold out |
| Corton Capital Inc. | 0 | $0 | 0.00% | −14,352−100.0% | Sold out |
| Boulder Hill Capital Management LP | 0 | $0 | 0.00% | −14,300−100.0% | Sold out |
| Harvest Investment Services, LLC | 0 | $0 | 0.00% | −14,141−100.0% | Sold out |
| Advisory Research Inc | 0 | $0 | 0.00% | −10,975−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −10,387−100.0% | Sold out |
| Jane Street Group, LLC | 0 | $0 | 0.00% | −9,168−100.0% | Sold out |
| Ergoteles LLC | 0 | $0 | 0.00% | −8,800−100.0% | Sold out |
| Acadian Asset Management LLC | 0 | $0 | 0.00% | −7,961−100.0% | Sold out |
| Navellier & Associates Inc | 0 | $0 | 0.00% | −7,553−100.0% | Sold out |
| Squarepoint Ops LLC | 0 | $0 | 0.00% | −6,606−100.0% | Sold out |
| Dynamic Technology Lab Private Ltd | 0 | $0 | 0.00% | −5,870−100.0% | Sold out |
| Trexquant Investment LP | 0 | $0 | 0.00% | −5,866−100.0% | Sold out |
| Delphia (USA) Inc. | 0 | $0 | 0.00% | −5,597−100.0% | Sold out |
| Quantbot Technologies LP | 0 | $0 | 0.00% | −5,338−100.0% | Sold out |