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, Q3 2023
Institutional positions in Prothena Corp Public Ltd Co as of Sep 30, 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
- 187
- −6 vs. Q2 2023
- Shares held
- 53.0M
- +1.07M (+2.1%) vs. Q2 2023
- Total value
- $2.56B
- −$984.1M (−27.8%) vs. Q2 2023
- New holders
- 25
- 73 more added
- Sold out
- 31
- 51 more reduced
3 institutions that held it in Q2 2023 haven't filed for Q3 2023 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 2023: 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, Q3 2023
Shares, value and share of portfolio for each institution holding Prothena Corp Public Ltd Co; share changes are against Q2 2023.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| EcoR1 Capital, LLC | 11,584,280 | $558.9M | 19.05% | 00.0% | Unchanged |
| FMR LLC | 8,030,290 | $387.5M | 0.03% | +117,524+1.5% | Added |
| Price T Rowe Associates Inc | 3,820,013 | $184.3M | 0.03% | +266,245+7.5% | Added |
| BlackRock Inc. | 3,541,244 | $170.9M | 0.00% | −70,010−1.9% | Reduced |
| Wellington Management Group LLP | 2,141,647 | $103.3M | 0.02% | −69,575−3.1% | Reduced |
| State Street Corp | 2,110,233 | $101.8M | 0.01% | +236,555+12.6% | Added |
| Janus Henderson Group PLC | 1,826,609 | $88.1M | 0.06% | +154,078+9.2% | Added |
| Palo Alto Investors LP | 1,657,458 | $80.0M | 7.57% | 00.0% | Unchanged |
| First Light Asset Management, LLC | 1,494,039 | $72.1M | 6.85% | −6,090−0.4% | Reduced |
| Dimensional Fund Advisors LP | 1,102,862 | $53.2M | 0.02% | −47,346−4.1% | Reduced |
| Vanguard Group Inc | 1,030,774 | $49.7M | 0.00% | −9,907−1.0% | Reduced |
| Geode Capital Management, LLC | 859,060 | $41.5M | 0.00% | +20,639+2.5% | Added |
| T. Rowe Price Investment Management, Inc. | 853,479 | $41.2M | 0.03% | −22,691−2.6% | Reduced |
| PFM Health Sciences, LP | 836,571 | $40.4M | 1.93% | +62,025+8.0% | Added |
| Boxer Capital, LLC | 625,000 | $30.2M | 1.61% | +325,000+108.3% | Added |
| Rock Springs Capital Management LP | 614,298 | $29.6M | 0.79% | −139,164−18.5% | Reduced |
| Bank of New York Mellon Corp | 499,382 | $24.1M | 0.01% | −14,851−2.9% | Reduced |
| Eventide Asset Management, LLC | 445,155 | $21.5M | 0.39% | 00.0% | Unchanged |
| Nuveen Asset Management, LLC | 437,270 | $21.1M | 0.01% | −5,746−1.3% | Reduced |
| Northern Trust Corp | 409,847 | $19.8M | 0.00% | −2,128−0.5% | Reduced |
| JPMorgan Chase & Co | 402,031 | $19.4M | 0.00% | −12,034−2.9% | Reduced |
| Avidity Partners Management LP | 382,305 | $18.4M | 0.74% | −152,695−28.5% | Reduced |
| Finepoint Capital LP | 349,300 | $16.9M | 8.39% | +32,000+10.1% | Added |
| Granahan Investment Management Inc | 348,065 | $16.8M | 0.60% | +53,008+18.0% | Added |
| Charles Schwab Investment Management Inc | 308,537 | $14.9M | 0.00% | −3,946−1.3% | Reduced |
| Morgan Stanley | 268,860 | $13.0M | 0.00% | +116,265+76.2% | Added |
| UBS Asset Management Americas Inc | 266,047 | $12.8M | 0.01% | +39,845+17.6% | Added |
| Millennium Management LLC | 265,525 | $12.8M | 0.01% | +232,425+702.2% | Added |
| Renaissance Technologies LLC | 260,600 | $12.6M | 0.02% | −63,200−19.5% | Reduced |
| Goldman Sachs Group Inc | 250,323 | $12.1M | 0.00% | +57,688+29.9% | Added |
| Maple Rock Capital Partners Inc. | 234,584 | $11.3M | 1.32% | 00.0% | Unchanged |
| Point72 Asset Management, L.P. | 219,623 | $10.6M | 0.04% | +821+0.4% | Added |
| Two Sigma Advisers, LP | 203,800 | $9.83M | 0.03% | −62,500−23.5% | Reduced |
| TD Asset Management Inc | 172,682 | $8.33M | 0.01% | +83,269+93.1% | Added |
| Sectoral Asset Management Inc | 172,407 | $8.32M | 1.62% | +20,559+13.5% | Added |
| Birchview Capital, LP | 169,574 | $8.18M | 6.95% | +13,463+8.6% | Added |
| Mariner, LLC | 167,932 | $8.10M | 0.02% | +32,870+24.3% | Added |
| Perceptive Advisors LLC | 165,615 | $7.99M | 0.27% | −19,000−10.3% | Reduced |
| Amundi | 176,572 | $7.78M | 0.00% | +67,721+62.2% | Added |
| Rafferty Asset Management, LLC | 156,840 | $7.57M | 0.04% | +37,262+31.2% | Added |
| Citadel Advisors LLC | 148,935 | $7.19M | 0.01% | +128,493+628.6% | Added |
| Two Sigma Investments, LP | 136,203 | $6.57M | 0.02% | −26,530−16.3% | Reduced |
| Frazier Life Sciences Management, L.P. | 127,900 | $6.17M | 0.41% | 00.0% | Unchanged |
| Connor, Clark & Lunn Investment Management Ltd. | 127,775 | $6.17M | 0.03% | +17,639+16.0% | Added |
| Ensign Peak Advisors, Inc | 126,222 | $6.09M | 0.01% | 00.0% | Unchanged |
| Prosight Management, LP | 126,202 | $6.09M | 1.93% | +6,202+5.2% | Added |
| Pinnacle Associates Ltd | 125,006 | $6.03M | 0.11% | −5,453−4.2% | Reduced |
| AXA S.A. | 112,913 | $5.45M | 0.02% | −403−0.4% | Reduced |
| Bank of America Corp | 109,423 | $5.28M | 0.00% | −49,439−31.1% | Reduced |
| BNP Paribas Arbitrage, SA | 105,216 | $5.08M | 0.01% | +78,009+286.7% | Added |
| Norges Bank | 104,564 | $5.05M | 0.00% | 00.0% | Unchanged |
| Voya Investment Management LLC | 92,846 | $4.48M | 0.00% | −50,923−35.4% | Reduced |
| SG Americas Securities, LLC | 92,494 | $4.46M | 0.06% | +88,939+2,501.8% | Added |
| Swiss National Bank | 87,000 | $4.20M | 0.00% | +1,100+1.3% | Added |
| Barclays PLC | 86,035 | $4.15M | 0.00% | +18,223+26.9% | Added |
| Qube Research & Technologies Ltd | 84,653 | $4.08M | 0.01% | +43,256+104.5% | Added |
| DCF Advisers, LLC | 82,950 | $4.00M | 2.79% | −1,800−2.1% | Reduced |
| Manufacturers Life Insurance Company, The | 82,031 | $3.96M | 0.00% | +16,621+25.4% | Added |
| Affinity Asset Advisors, LLC | 79,214 | $3.82M | 1.25% | −20,786−20.8% | Reduced |
| Citigroup Inc | 67,930 | $3.28M | 0.00% | +20,378+42.9% | Added |
| Jump Financial, LLC | 63,117 | $3.05M | 0.11% | +39,486+167.1% | Added |
| Rhumbline Advisers | 62,451 | $3.01M | 0.00% | +1,661+2.7% | Added |
| ExodusPoint Capital Management, LP | 60,853 | $2.94M | 0.04% | +60,853 | New |
| Handelsbanken Fonder AB | 58,900 | $2.84M | 0.02% | 00.0% | Unchanged |
| Pier Capital, LLC | 57,456 | $2.77M | 0.45% | +57,456 | New |
| Trexquant Investment LP | 56,843 | $2.74M | 0.07% | +56,843 | New |
| Putnam Investments LLC | 56,613 | $2.73M | 0.00% | +3,885+7.4% | Added |
| Wells Fargo & Company | 56,458 | $2.72M | 0.00% | +704+1.3% | Added |
| Jennison Associates LLC | 55,579 | $2.68M | 0.00% | +6,346+12.9% | Added |
| RBF Capital, LLC | 54,362 | $2.62M | 0.17% | 00.0% | Unchanged |
| Credit Suisse AG | 51,751 | $2.50M | 0.00% | −5,646−9.8% | Reduced |
| State of New Jersey Common Pension Fund D | 45,952 | $2.22M | 0.01% | +9,887+27.4% | Added |
| Alliancebernstein L.P. | 45,746 | $2.21M | 0.00% | −3,400−6.9% | Reduced |
| UBS Group AG | 45,252 | $2.18M | 0.00% | +22,877+102.2% | Added |
| State of Wisconsin Investment Board | 44,772 | $2.16M | 0.01% | +2,732+6.5% | Added |
| California State Teachers Retirement System | 44,132 | $2.13M | 0.00% | −4,372−9.0% | Reduced |
| Susquehanna International Group, LLP | 41,605 | $2.01M | 0.00% | +19,075+84.7% | Added |
| Platinum Investment Management Ltd | 41,508 | $2.00M | 0.08% | 00.0% | Unchanged |
| Alps Advisors Inc | 39,524 | $1.91M | 0.02% | +748+1.9% | Added |
| Legal & General Group Plc | 38,502 | $1.86M | 0.00% | +754+2.0% | Added |
| Aigen Investment Management, LP | 34,890 | $1.68M | 0.32% | +34,890 | New |
| Hudson Bay Capital Management LP | 32,500 | $1.57M | 0.01% | +32,500 | New |
| Squarepoint Ops LLC | 32,339 | $1.56M | 0.01% | +32,339 | New |
| Hillsdale Investment Management Inc. | 31,300 | $1.51M | 0.14% | −6,100−16.3% | Reduced |
| New York State Common Retirement Fund | 30,973 | $1.49M | 0.00% | −202−0.6% | Reduced |
| Invesco Ltd. | 30,717 | $1.48M | 0.00% | −33,228−52.0% | Reduced |
| First Trust Advisors LP | 30,709 | $1.48M | 0.00% | +30,709 | New |
| Healthcare of Ontario Pension Plan Trust Fund | 30,500 | $1.47M | 0.01% | +30,500 | New |
| Thornburg Investment Management Inc | 28,271 | $1.36M | 0.02% | −740−2.6% | Reduced |
| Algert Global LLC | 28,000 | $1.35M | 0.06% | +28,000 | New |
| Profund Advisors LLC | 26,634 | $1.29M | 0.07% | +4,585+20.8% | Added |
| Silverarc Capital Management, LLC | 26,629 | $1.28M | 0.48% | −23,092−46.4% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 25,652 | $1.24M | 0.00% | +3,222+14.4% | Added |
| Principal Financial Group Inc | 25,582 | $1.23M | 0.00% | −48,741−65.6% | Reduced |
| Edgewood Management LLC | 24,060 | $1.16M | 0.00% | 00.0% | Unchanged |
| Moody Aldrich Partners LLC | 23,904 | $1.15M | 0.22% | −13,695−36.4% | Reduced |
| Deutsche Bank AG | 22,613 | $1.09M | 0.00% | +2,857+14.5% | Added |
| MetLife Investment Management | 21,852 | $1.05M | 0.01% | 00.0% | Unchanged |
| American International Group, Inc. | 20,690 | $998.3K | 0.01% | +736+3.7% | Added |
| Rockefeller Capital Management L.P. | 19,299 | $931.2K | 0.00% | +5,638+41.3% | Added |