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 2023
Institutional positions in Prothena Corp Public Ltd Co as of Mar 31, 2023. 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
- −4 vs. Q4 2022
- Shares held
- 51.7M
- +2.40M (+4.9%) vs. Q4 2022
- Total value
- $2.51B
- −$459.0M (−15.4%) vs. Q4 2022
- New holders
- 27
- 70 more added
- Sold out
- 31
- 56 more reduced
5 institutions that held it in Q4 2022 haven't filed for Q1 2023 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2022: 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 2023
Shares, value and share of portfolio for each institution holding Prothena Corp Public Ltd Co; share changes are against Q4 2022.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Profund Advisors LLC | 26,531 | $1.29M | 0.08% | +26,531 | New |
| Canada Pension Plan Investment Board | 26,800 | $1.30M | 0.00% | +26,800 | New |
| Ergoteles LLC | 26,911 | $1.30M | 0.05% | +11,386+73.3% | Added |
| Deutsche Bank AG | 27,351 | $1.33M | 0.00% | +5,453+24.9% | Added |
| Invesco Ltd. | 28,352 | $1.37M | 0.00% | −13,952−33.0% | Reduced |
| Macquarie Group Ltd | 28,569 | $1.39M | 0.00% | 00.0% | Unchanged |
| Tudor Investment Corp Et Al | 29,008 | $1.41M | 0.03% | +29,008 | New |
| Thornburg Investment Management Inc | 29,643 | $1.44M | 0.02% | +5,369+22.1% | Added |
| State of Wisconsin Investment Board | 31,189 | $1.51M | 0.00% | −1,806−5.5% | Reduced |
| New York State Common Retirement Fund | 31,575 | $1.53M | 0.00% | −4,205−11.8% | Reduced |
| Jump Financial, LLC | 32,971 | $1.60M | 0.07% | +32,971 | New |
| Alps Advisors Inc | 34,634 | $1.68M | 0.01% | +1,858+5.7% | Added |
| EAM Investors, LLC | 36,156 | $1.75M | 0.34% | −17,190−32.2% | Reduced |
| Legal & General Group Plc | 36,359 | $1.76M | 0.00% | +19,325+113.4% | Added |
| Citadel Advisors LLC | 37,701 | $1.83M | 0.00% | +37,452+15,041.0% | Added |
| Moody Aldrich Partners LLC | 37,761 | $1.83M | 0.37% | −1,476−3.8% | Reduced |
| Voya Investment Management LLC | 38,547 | $1.87M | 0.00% | +547+1.4% | Added |
| Cubist Systematic Strategies, LLC | 40,900 | $1.98M | 0.02% | +181+0.4% | Added |
| Platinum Investment Management Ltd | 41,508 | $2.01M | 0.07% | 00.0% | Unchanged |
| Credit Suisse AG | 41,715 | $2.02M | 0.00% | +2,828+7.3% | Added |
| Trexquant Investment LP | 42,200 | $2.05M | 0.06% | +10,963+35.1% | Added |
| California State Teachers Retirement System | 44,308 | $2.15M | 0.00% | +1,088+2.5% | Added |
| State of New Jersey Common Pension Fund D | 44,559 | $2.16M | 0.01% | +6,959+18.5% | Added |
| Alliancebernstein L.P. | 44,866 | $2.17M | 0.00% | 00.0% | Unchanged |
| Wells Fargo & Company | 47,320 | $2.29M | 0.00% | +36,655+343.7% | Added |
| Atika Capital Management LLC | 48,578 | $2.35M | 0.37% | −42,600−46.7% | Reduced |
| Jennison Associates LLC | 49,233 | $2.39M | 0.00% | −80.0% | Reduced |
| Putnam Investments LLC | 50,905 | $2.47M | 0.00% | −14,489−22.2% | Reduced |
| Handelsbanken Fonder AB | 52,000 | $2.52M | 0.01% | 00.0% | Unchanged |
| RBF Capital, LLC | 54,362 | $2.63M | 0.19% | 00.0% | Unchanged |
| Principal Financial Group Inc | 54,869 | $2.66M | 0.00% | −1,138−2.0% | Reduced |
| Rhumbline Advisers | 55,844 | $2.71M | 0.00% | +6,126+12.3% | Added |
| BNP Paribas Arbitrage, SA | 56,025 | $2.72M | 0.01% | +30,614+120.5% | Added |
| Manufacturers Life Insurance Company, The | 56,966 | $2.76M | 0.00% | +1,904+3.5% | Added |
| Susquehanna International Group, LLP | 61,391 | $2.98M | 0.00% | +50,673+472.8% | Added |
| UBS Group AG | 61,643 | $2.99M | 0.00% | −29,426−32.3% | Reduced |
| EAM Global Investors LLC | 63,120 | $3.06M | 0.86% | −13,533−17.7% | Reduced |
| Barclays PLC | 64,604 | $3.13M | 0.00% | −14,735−18.6% | Reduced |
| Hillsdale Investment Management Inc. | 65,000 | $3.15M | 0.27% | −12,500−16.1% | Reduced |
| Swiss National Bank | 73,100 | $3.54M | 0.00% | −6,200−7.8% | Reduced |
| TD Asset Management Inc | 74,706 | $3.62M | 0.00% | −6,807−8.4% | Reduced |
| Squarepoint Ops LLC | 78,309 | $3.80M | 0.03% | +72,793+1,319.7% | Added |
| DCF Advisers, LLC | 84,250 | $4.08M | 3.01% | +10,150+13.7% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 89,424 | $4.33M | 0.02% | +28,992+48.0% | Added |
| Mariner, LLC | 107,107 | $5.19M | 0.02% | +80,180+297.8% | Added |
| SG Americas Securities, LLC | 109,401 | $5.30M | 0.07% | +30,629+38.9% | Added |
| Citigroup Inc | 114,800 | $5.56M | 0.01% | +51,400+81.1% | Added |
| Man Group plc | – | $5.71M | 0.02% | – | – |
| Sectoral Asset Management Inc | 122,750 | $5.95M | 1.14% | +7,550+6.6% | Added |
| Ensign Peak Advisors, Inc | 125,622 | $6.09M | 0.01% | +200+0.2% | Added |
| Frazier Life Sciences Management, L.P. | 127,900 | $6.20M | 0.45% | 00.0% | Unchanged |
| Birchview Capital, LP | 128,395 | $6.22M | 4.87% | +1,200+0.9% | Added |
| Pinnacle Associates Ltd | 135,281 | $6.56M | 0.13% | −2,290−1.7% | Reduced |
| Rafferty Asset Management, LLC | 141,689 | $6.87M | 0.05% | +3,336+2.4% | Added |
| Bank of New York Mellon Corp | 164,092 | $7.95M | 0.00% | +27,095+19.8% | Added |
| Millennium Management LLC | 194,639 | $9.43M | 0.01% | −18,971−8.9% | Reduced |
| Norges Bank | 218,814 | $10.6M | 0.00% | +159,555+269.3% | Added |
| Goldman Sachs Group Inc | 225,077 | $10.9M | 0.00% | +9,022+4.2% | Added |
| UBS Asset Management Americas Inc | 226,202 | $11.0M | 0.01% | −2,166−0.9% | Reduced |
| Granahan Investment Management Inc | 232,628 | $11.3M | 0.34% | +32,702+16.4% | Added |
| Perceptive Advisors LLC | 237,646 | $11.5M | 0.34% | 00.0% | Unchanged |
| Morgan Stanley | 284,907 | $13.8M | 0.00% | +104,504+57.9% | Added |
| Maple Rock Capital Partners Inc. | 293,584 | $14.2M | 1.39% | −105,830−26.5% | Reduced |
| Charles Schwab Investment Management Inc | 298,971 | $14.5M | 0.00% | −1,879−0.6% | Reduced |
| Boxer Capital, LLC | 300,000 | $14.5M | 0.71% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 327,718 | $15.9M | 0.00% | −76,833−19.0% | Reduced |
| Finepoint Capital LP | 331,600 | $16.1M | 6.14% | +8,700+2.7% | Added |
| Point72 Asset Management, L.P. | 334,993 | $16.2M | 0.06% | +23,493+7.5% | Added |
| Two Sigma Investments, LP | 365,539 | $17.7M | 0.05% | +162,104+79.7% | Added |
| Two Sigma Advisers, LP | 381,300 | $18.5M | 0.05% | +54,300+16.6% | Added |
| Northern Trust Corp | 382,688 | $18.5M | 0.00% | +21,103+5.8% | Added |
| Renaissance Technologies LLC | 407,300 | $19.7M | 0.03% | −67,600−14.2% | Reduced |
| Eventide Asset Management, LLC | 438,732 | $21.3M | 0.39% | 00.0% | Unchanged |
| Prosight Management, LP | 447,092 | $21.7M | 10.38% | +117,092+35.5% | Added |
| Nuveen Asset Management, LLC | 506,728 | $24.6M | 0.01% | −66,062−11.5% | Reduced |
| Bank of America Corp | 564,441 | $27.4M | 0.00% | +442,770+363.9% | Added |
| Rock Springs Capital Management LP | 753,462 | $36.5M | 0.87% | 00.0% | Unchanged |
| PFM Health Sciences, LP | 774,546 | $37.5M | 1.73% | −100,918−11.5% | Reduced |
| Geode Capital Management, LLC | 779,824 | $37.8M | 0.00% | +64,223+9.0% | Added |
| T. Rowe Price Investment Management, Inc. | 914,683 | $44.3M | 0.03% | −13,276−1.4% | Reduced |
| Vanguard Group Inc | 944,556 | $45.8M | 0.00% | +74,422+8.6% | Added |
| Avidity Partners Management LP | 1,068,200 | $51.8M | 1.72% | −1,884,800−63.8% | Reduced |
| Dimensional Fund Advisors LP | 1,232,635 | $59.7M | 0.02% | −87,866−6.7% | Reduced |
| First Light Asset Management, LLC | 1,511,168 | $73.2M | 6.60% | −24,431−1.6% | Reduced |
| Janus Henderson Group PLC | 1,596,303 | $77.4M | 0.05% | +163,980+11.4% | Added |
| Palo Alto Investors LP | 1,663,777 | $80.6M | 6.68% | +5,200+0.3% | Added |
| State Street Corp | 2,102,458 | $101.9M | 0.01% | +50,498+2.5% | Added |
| Wellington Management Group LLP | 2,266,078 | $109.8M | 0.02% | +501,185+28.4% | Added |
| Price T Rowe Associates Inc | 3,202,293 | $155.2M | 0.02% | −3,610−0.1% | Reduced |
| BlackRock Inc. | 3,624,627 | $175.7M | 0.01% | +139,559+4.0% | Added |
| FMR LLC | 6,762,025 | $327.8M | 0.03% | +2,814,753+71.3% | Added |
| EcoR1 Capital, LLC | 11,584,280 | $561.5M | 18.10% | 00.0% | Unchanged |
| Suvretta Capital Management, LLC | 0 | $0 | 0.00% | −206,448−100.0% | Sold out |
| Woodline Partners LP | 0 | $0 | 0.00% | −123,623−100.0% | Sold out |
| Paradigm Biocapital Advisors LP | 0 | $0 | 0.00% | −75,000−100.0% | Sold out |
| Silverarc Capital Management, LLC | 0 | $0 | 0.00% | −71,706−100.0% | Sold out |
| Pura Vida Investments, LLC | 0 | $0 | 0.00% | −64,000−100.0% | Sold out |
| Capital Fund Management S.A. | 0 | $0 | 0.00% | −29,772−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −28,128−100.0% | Sold out |
| Algert Global LLC | 0 | $0 | 0.00% | −19,203−100.0% | Sold out |