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 |
|---|---|---|---|---|---|
| First Trust Advisors LP | 30,709 | $1.48M | 0.00% | +30,709 | New |
| Invesco Ltd. | 30,717 | $1.48M | 0.00% | −33,228−52.0% | Reduced |
| New York State Common Retirement Fund | 30,973 | $1.49M | 0.00% | −202−0.6% | Reduced |
| Hillsdale Investment Management Inc. | 31,300 | $1.51M | 0.14% | −6,100−16.3% | Reduced |
| Squarepoint Ops LLC | 32,339 | $1.56M | 0.01% | +32,339 | New |
| Hudson Bay Capital Management LP | 32,500 | $1.57M | 0.01% | +32,500 | New |
| Aigen Investment Management, LP | 34,890 | $1.68M | 0.32% | +34,890 | New |
| Legal & General Group Plc | 38,502 | $1.86M | 0.00% | +754+2.0% | Added |
| Alps Advisors Inc | 39,524 | $1.91M | 0.02% | +748+1.9% | Added |
| Platinum Investment Management Ltd | 41,508 | $2.00M | 0.08% | 00.0% | Unchanged |
| Susquehanna International Group, LLP | 41,605 | $2.01M | 0.00% | +19,075+84.7% | Added |
| California State Teachers Retirement System | 44,132 | $2.13M | 0.00% | −4,372−9.0% | Reduced |
| State of Wisconsin Investment Board | 44,772 | $2.16M | 0.01% | +2,732+6.5% | Added |
| UBS Group AG | 45,252 | $2.18M | 0.00% | +22,877+102.2% | Added |
| Alliancebernstein L.P. | 45,746 | $2.21M | 0.00% | −3,400−6.9% | Reduced |
| State of New Jersey Common Pension Fund D | 45,952 | $2.22M | 0.01% | +9,887+27.4% | Added |
| Credit Suisse AG | 51,751 | $2.50M | 0.00% | −5,646−9.8% | Reduced |
| RBF Capital, LLC | 54,362 | $2.62M | 0.17% | 00.0% | Unchanged |
| Jennison Associates LLC | 55,579 | $2.68M | 0.00% | +6,346+12.9% | Added |
| Wells Fargo & Company | 56,458 | $2.72M | 0.00% | +704+1.3% | Added |
| Putnam Investments LLC | 56,613 | $2.73M | 0.00% | +3,885+7.4% | Added |
| Trexquant Investment LP | 56,843 | $2.74M | 0.07% | +56,843 | New |
| Pier Capital, LLC | 57,456 | $2.77M | 0.45% | +57,456 | New |
| Handelsbanken Fonder AB | 58,900 | $2.84M | 0.02% | 00.0% | Unchanged |
| ExodusPoint Capital Management, LP | 60,853 | $2.94M | 0.04% | +60,853 | New |
| Rhumbline Advisers | 62,451 | $3.01M | 0.00% | +1,661+2.7% | Added |
| Jump Financial, LLC | 63,117 | $3.05M | 0.11% | +39,486+167.1% | Added |
| Citigroup Inc | 67,930 | $3.28M | 0.00% | +20,378+42.9% | Added |
| Affinity Asset Advisors, LLC | 79,214 | $3.82M | 1.25% | −20,786−20.8% | Reduced |
| Manufacturers Life Insurance Company, The | 82,031 | $3.96M | 0.00% | +16,621+25.4% | Added |
| DCF Advisers, LLC | 82,950 | $4.00M | 2.79% | −1,800−2.1% | Reduced |
| Qube Research & Technologies Ltd | 84,653 | $4.08M | 0.01% | +43,256+104.5% | Added |
| Barclays PLC | 86,035 | $4.15M | 0.00% | +18,223+26.9% | Added |
| Swiss National Bank | 87,000 | $4.20M | 0.00% | +1,100+1.3% | Added |
| SG Americas Securities, LLC | 92,494 | $4.46M | 0.06% | +88,939+2,501.8% | Added |
| Voya Investment Management LLC | 92,846 | $4.48M | 0.00% | −50,923−35.4% | Reduced |
| Norges Bank | 104,564 | $5.05M | 0.00% | 00.0% | Unchanged |
| BNP Paribas Arbitrage, SA | 105,216 | $5.08M | 0.01% | +78,009+286.7% | Added |
| Bank of America Corp | 109,423 | $5.28M | 0.00% | −49,439−31.1% | Reduced |
| AXA S.A. | 112,913 | $5.45M | 0.02% | −403−0.4% | Reduced |
| Pinnacle Associates Ltd | 125,006 | $6.03M | 0.11% | −5,453−4.2% | Reduced |
| Prosight Management, LP | 126,202 | $6.09M | 1.93% | +6,202+5.2% | Added |
| Ensign Peak Advisors, Inc | 126,222 | $6.09M | 0.01% | 00.0% | Unchanged |
| Connor, Clark & Lunn Investment Management Ltd. | 127,775 | $6.17M | 0.03% | +17,639+16.0% | Added |
| Frazier Life Sciences Management, L.P. | 127,900 | $6.17M | 0.41% | 00.0% | Unchanged |
| Two Sigma Investments, LP | 136,203 | $6.57M | 0.02% | −26,530−16.3% | Reduced |
| Citadel Advisors LLC | 148,935 | $7.19M | 0.01% | +128,493+628.6% | Added |
| Rafferty Asset Management, LLC | 156,840 | $7.57M | 0.04% | +37,262+31.2% | Added |
| Amundi | 176,572 | $7.78M | 0.00% | +67,721+62.2% | Added |
| Perceptive Advisors LLC | 165,615 | $7.99M | 0.27% | −19,000−10.3% | Reduced |
| Mariner, LLC | 167,932 | $8.10M | 0.02% | +32,870+24.3% | Added |
| Birchview Capital, LP | 169,574 | $8.18M | 6.95% | +13,463+8.6% | Added |
| Sectoral Asset Management Inc | 172,407 | $8.32M | 1.62% | +20,559+13.5% | Added |
| TD Asset Management Inc | 172,682 | $8.33M | 0.01% | +83,269+93.1% | Added |
| Two Sigma Advisers, LP | 203,800 | $9.83M | 0.03% | −62,500−23.5% | Reduced |
| Point72 Asset Management, L.P. | 219,623 | $10.6M | 0.04% | +821+0.4% | Added |
| Maple Rock Capital Partners Inc. | 234,584 | $11.3M | 1.32% | 00.0% | Unchanged |
| Goldman Sachs Group Inc | 250,323 | $12.1M | 0.00% | +57,688+29.9% | Added |
| Renaissance Technologies LLC | 260,600 | $12.6M | 0.02% | −63,200−19.5% | Reduced |
| Millennium Management LLC | 265,525 | $12.8M | 0.01% | +232,425+702.2% | Added |
| UBS Asset Management Americas Inc | 266,047 | $12.8M | 0.01% | +39,845+17.6% | Added |
| Morgan Stanley | 268,860 | $13.0M | 0.00% | +116,265+76.2% | Added |
| Charles Schwab Investment Management Inc | 308,537 | $14.9M | 0.00% | −3,946−1.3% | Reduced |
| Granahan Investment Management Inc | 348,065 | $16.8M | 0.60% | +53,008+18.0% | Added |
| Finepoint Capital LP | 349,300 | $16.9M | 8.39% | +32,000+10.1% | Added |
| Avidity Partners Management LP | 382,305 | $18.4M | 0.74% | −152,695−28.5% | Reduced |
| JPMorgan Chase & Co | 402,031 | $19.4M | 0.00% | −12,034−2.9% | Reduced |
| Northern Trust Corp | 409,847 | $19.8M | 0.00% | −2,128−0.5% | Reduced |
| Nuveen Asset Management, LLC | 437,270 | $21.1M | 0.01% | −5,746−1.3% | Reduced |
| Eventide Asset Management, LLC | 445,155 | $21.5M | 0.39% | 00.0% | Unchanged |
| Bank of New York Mellon Corp | 499,382 | $24.1M | 0.01% | −14,851−2.9% | Reduced |
| Rock Springs Capital Management LP | 614,298 | $29.6M | 0.79% | −139,164−18.5% | Reduced |
| Boxer Capital, LLC | 625,000 | $30.2M | 1.61% | +325,000+108.3% | Added |
| PFM Health Sciences, LP | 836,571 | $40.4M | 1.93% | +62,025+8.0% | Added |
| T. Rowe Price Investment Management, Inc. | 853,479 | $41.2M | 0.03% | −22,691−2.6% | Reduced |
| Geode Capital Management, LLC | 859,060 | $41.5M | 0.00% | +20,639+2.5% | Added |
| Vanguard Group Inc | 1,030,774 | $49.7M | 0.00% | −9,907−1.0% | Reduced |
| Dimensional Fund Advisors LP | 1,102,862 | $53.2M | 0.02% | −47,346−4.1% | Reduced |
| First Light Asset Management, LLC | 1,494,039 | $72.1M | 6.85% | −6,090−0.4% | Reduced |
| Palo Alto Investors LP | 1,657,458 | $80.0M | 7.57% | 00.0% | Unchanged |
| Janus Henderson Group PLC | 1,826,609 | $88.1M | 0.06% | +154,078+9.2% | Added |
| State Street Corp | 2,110,233 | $101.8M | 0.01% | +236,555+12.6% | Added |
| Wellington Management Group LLP | 2,141,647 | $103.3M | 0.02% | −69,575−3.1% | Reduced |
| BlackRock Inc. | 3,541,244 | $170.9M | 0.00% | −70,010−1.9% | Reduced |
| Price T Rowe Associates Inc | 3,820,013 | $184.3M | 0.03% | +266,245+7.5% | Added |
| FMR LLC | 8,030,290 | $387.5M | 0.03% | +117,524+1.5% | Added |
| EcoR1 Capital, LLC | 11,584,280 | $558.9M | 19.05% | 00.0% | Unchanged |
| Atika Capital Management LLC | 0 | $0 | 0.00% | −97,500−100.0% | Sold out |
| EAM Global Investors LLC | 0 | $0 | 0.00% | −70,872−100.0% | Sold out |
| Bank of Montreal | 0 | $0 | 0.00% | −66,767−100.0% | Sold out |
| Integral Health Asset Management, LLC | 0 | $0 | 0.00% | −52,000−100.0% | Sold out |
| EAM Investors, LLC | 0 | $0 | 0.00% | −49,656−100.0% | Sold out |
| Empowered Funds, LLC | 0 | $0 | 0.00% | −43,937−100.0% | Sold out |
| Woodline Partners LP | 0 | $0 | 0.00% | −41,633−100.0% | Sold out |
| Macquarie Group Ltd | 0 | $0 | 0.00% | −34,369−100.0% | Sold out |
| Prudential Financial Inc | 0 | $0 | 0.00% | −22,911−100.0% | Sold out |
| Fred Alger Management, LLC | 0 | $0 | 0.00% | −22,064−100.0% | Sold out |
| Advisory Research Inc | 0 | $0 | 0.00% | −22,039−100.0% | Sold out |
| Franklin Resources Inc | 0 | $0 | 0.00% | −20,739−100.0% | Sold out |
| Ergoteles LLC | 0 | $0 | 0.00% | −13,276−100.0% | Sold out |