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 $465.6M in total; no superinvestor holds it.
13F holders, Q2 2023
Institutional positions in Prothena Corp Public Ltd Co as of Jun 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
- 196
- +4 vs. Q1 2023
- Shares held
- 52.0M
- +214.3K (+0.4%) vs. Q1 2023
- Total value
- $3.54B
- +$1.03B (+41.0%) vs. Q1 2023
- New holders
- 30
- 72 more added
- Sold out
- 26
- 58 more reduced
Compare with Q1 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 | $465.6M |
| Q1 2026 | 186 | $459.5M |
| Q4 2025 | 182 | $452.1M |
| Q3 2025 | 187 | $423.0M |
| Q2 2025 | 189 | $254.2M |
| Q1 2025 | 161 | $647.4M |
| Q4 2024 | 171 | $745.5M |
| Q3 2024 | 164 | $862.7M |
| Q2 2024 | 160 | $1.06B |
| Q1 2024 | 169 | $1.37B |
| Q4 2023 | 187 | $1.99B |
| Q3 2023 | 187 | $2.57B |
| Q2 2023 | 196 | $3.54B |
| Q1 2023 | 192 | $2.84B |
| Q4 2022 | 201 | $2.98B |
| Q3 2022 | 183 | $2.71B |
| Q2 2022 | 167 | $1.21B |
| Q1 2022 | 174 | $1.64B |
| Q4 2021 | 196 | $2.13B |
| Q3 2021 | 192 | $2.92B |
| Q2 2021 | 156 | $2.09B |
| Q1 2021 | 146 | $1.00B |
Institutions, Q2 2023
Shares, value and share of portfolio for each institution holding Prothena Corp Public Ltd Co; share changes are against Q1 2023.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| EcoR1 Capital, LLC | 11,584,280 | $791.0M | 20.86% | 00.0% | Unchanged |
| FMR LLC | 7,912,766 | $540.3M | 0.05% | +1,150,741+17.0% | Added |
| BlackRock Inc. | 3,611,254 | $246.6M | 0.01% | −13,373−0.4% | Reduced |
| Price T Rowe Associates Inc | 3,553,768 | $242.7M | 0.03% | +351,475+11.0% | Added |
| Wellington Management Group LLP | 2,211,222 | $151.0M | 0.03% | −54,856−2.4% | Reduced |
| State Street Corp | 1,873,678 | $127.9M | 0.01% | −228,780−10.9% | Reduced |
| Janus Henderson Group PLC | 1,672,531 | $114.2M | 0.07% | +76,228+4.8% | Added |
| Palo Alto Investors LP | 1,657,458 | $113.2M | 9.14% | −6,319−0.4% | Reduced |
| First Light Asset Management, LLC | 1,500,129 | $102.4M | 8.03% | −11,039−0.7% | Reduced |
| Dimensional Fund Advisors LP | 1,150,208 | $78.5M | 0.03% | −82,427−6.7% | Reduced |
| Vanguard Group Inc | 1,040,681 | $71.1M | 0.00% | +96,125+10.2% | Added |
| T. Rowe Price Investment Management, Inc. | 876,170 | $59.8M | 0.04% | −38,513−4.2% | Reduced |
| Geode Capital Management, LLC | 838,421 | $57.2M | 0.01% | +58,597+7.5% | Added |
| PFM Health Sciences, LP | 774,546 | $52.9M | 2.13% | 00.0% | Unchanged |
| Rock Springs Capital Management LP | 753,462 | $51.4M | 1.22% | 00.0% | Unchanged |
| Avidity Partners Management LP | 535,000 | $36.5M | 1.28% | −533,200−49.9% | Reduced |
| Bank of New York Mellon Corp | 514,233 | $35.1M | 0.01% | +350,141+213.4% | Added |
| Eventide Asset Management, LLC | 445,155 | $30.4M | 0.51% | +6,423+1.5% | Added |
| Nuveen Asset Management, LLC | 443,016 | $30.2M | 0.01% | −63,712−12.6% | Reduced |
| JPMorgan Chase & Co | 414,065 | $28.3M | 0.00% | +86,347+26.3% | Added |
| Northern Trust Corp | 411,975 | $28.1M | 0.01% | +29,287+7.7% | Added |
| Renaissance Technologies LLC | 323,800 | $22.1M | 0.03% | −83,500−20.5% | Reduced |
| Finepoint Capital LP | 317,300 | $21.7M | 7.50% | −14,300−4.3% | Reduced |
| Charles Schwab Investment Management Inc | 312,483 | $21.3M | 0.01% | +13,512+4.5% | Added |
| Boxer Capital, LLC | 300,000 | $20.5M | 0.95% | 00.0% | Unchanged |
| Granahan Investment Management Inc | 295,057 | $20.1M | 0.62% | +62,429+26.8% | Added |
| Two Sigma Advisers, LP | 266,300 | $18.2M | 0.05% | −115,000−30.2% | Reduced |
| Maple Rock Capital Partners Inc. | 234,584 | $16.0M | 2.04% | −59,000−20.1% | Reduced |
| Point72 Asset Management, L.P. | 218,802 | $14.9M | 0.05% | −116,191−34.7% | Reduced |
| Goldman Sachs Group Inc | 192,635 | $13.2M | 0.00% | −32,442−14.4% | Reduced |
| Perceptive Advisors LLC | 184,615 | $12.6M | 0.37% | −53,031−22.3% | Reduced |
| Man Group plc | 170,562 | $11.6M | 0.04% | – | – |
| Two Sigma Investments, LP | 162,733 | $11.1M | 0.03% | −202,806−55.5% | Reduced |
| UBS Asset Management Americas Inc | 226,202 | $11.0M | 0.01% | 00.0% | Unchanged |
| Bank of America Corp | 158,862 | $10.8M | 0.00% | −405,579−71.9% | Reduced |
| Birchview Capital, LP | 156,111 | $10.7M | 7.99% | +27,716+21.6% | Added |
| Morgan Stanley | 152,595 | $10.4M | 0.00% | −132,312−46.4% | Reduced |
| Sectoral Asset Management Inc | 151,848 | $10.4M | 1.73% | +29,098+23.7% | Added |
| Voya Investment Management LLC | 143,769 | $9.82M | 0.01% | +105,222+273.0% | Added |
| Mariner, LLC | 135,062 | $9.22M | 0.02% | +27,955+26.1% | Added |
| Pinnacle Associates Ltd | 130,459 | $8.91M | 0.15% | −4,822−3.6% | Reduced |
| Frazier Life Sciences Management, L.P. | 127,900 | $8.73M | 0.52% | 00.0% | Unchanged |
| Ensign Peak Advisors, Inc | 126,222 | $8.62M | 0.02% | +600+0.5% | Added |
| Prosight Management, LP | 120,000 | $8.19M | 2.40% | −327,092−73.2% | Reduced |
| Rafferty Asset Management, LLC | 119,578 | $8.16M | 0.05% | −22,111−15.6% | Reduced |
| AXA S.A. | 113,316 | $7.74M | 0.03% | +94,364+497.9% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 110,136 | $7.52M | 0.04% | +20,712+23.2% | Added |
| Amundi | 108,851 | $7.48M | 0.00% | +106,070+3,814.1% | Added |
| Norges Bank | 104,564 | $7.14M | 0.00% | −114,250−52.2% | Reduced |
| Affinity Asset Advisors, LLC | 100,000 | $6.83M | 2.69% | +100,000 | New |
| Atika Capital Management LLC | 97,500 | $6.66M | 0.84% | +48,922+100.7% | Added |
| TD Asset Management Inc | 89,413 | $6.11M | 0.01% | +14,707+19.7% | Added |
| Swiss National Bank | 85,900 | $5.87M | 0.00% | +12,800+17.5% | Added |
| DCF Advisers, LLC | 84,750 | $5.79M | 3.99% | +500+0.6% | Added |
| Principal Financial Group Inc | 74,323 | $5.07M | 0.00% | +19,454+35.5% | Added |
| EAM Global Investors LLC | 70,872 | $4.84M | 1.42% | +7,752+12.3% | Added |
| Barclays PLC | 67,812 | $4.63M | 0.00% | +3,208+5.0% | Added |
| Bank of Montreal | 66,767 | $4.61M | 0.00% | +66,767 | New |
| Manufacturers Life Insurance Company, The | 65,410 | $4.47M | 0.00% | +8,444+14.8% | Added |
| Invesco Ltd. | 63,945 | $4.37M | 0.00% | +35,593+125.5% | Added |
| Rhumbline Advisers | 60,790 | $4.15M | 0.00% | +4,946+8.9% | Added |
| Handelsbanken Fonder AB | 58,900 | $4.02M | 0.02% | +6,900+13.3% | Added |
| Credit Suisse AG | 57,397 | $3.92M | 0.00% | +15,682+37.6% | Added |
| Wells Fargo & Company | 55,754 | $3.81M | 0.00% | +8,434+17.8% | Added |
| Walleye Capital LLC | 55,652 | $3.80M | 0.07% | +55,652 | New |
| RBF Capital, LLC | 54,362 | $3.71M | 0.23% | 00.0% | Unchanged |
| Jane Street Group, LLC | 53,475 | $3.65M | 0.00% | +34,082+175.7% | Added |
| Putnam Investments LLC | 52,728 | $3.60M | 0.01% | +1,823+3.6% | Added |
| Integral Health Asset Management, LLC | 52,000 | $3.55M | 0.47% | +52,000 | New |
| Silverarc Capital Management, LLC | 49,721 | $3.39M | 1.15% | +49,721 | New |
| EAM Investors, LLC | 49,656 | $3.39M | 0.63% | +13,500+37.3% | Added |
| Jennison Associates LLC | 49,233 | $3.36M | 0.00% | 00.0% | Unchanged |
| Alliancebernstein L.P. | 49,146 | $3.36M | 0.00% | +4,280+9.5% | Added |
| California State Teachers Retirement System | 48,504 | $3.31M | 0.00% | +4,196+9.5% | Added |
| Citigroup Inc | 47,552 | $3.25M | 0.00% | −67,248−58.6% | Reduced |
| Empowered Funds, LLC | 43,937 | $3.00M | 0.11% | +43,937 | New |
| EA Series Trust | 43,937 | $3.00M | 0.11% | +43,937 | New |
| State of Wisconsin Investment Board | 42,040 | $2.87M | 0.01% | +10,851+34.8% | Added |
| Woodline Partners LP | 41,633 | $2.84M | 0.03% | +41,633 | New |
| Platinum Investment Management Ltd | 41,508 | $2.83M | 0.10% | 00.0% | Unchanged |
| Qube Research & Technologies Ltd | 41,397 | $2.83M | 0.01% | +33,159+402.5% | Added |
| Alps Advisors Inc | 38,776 | $2.65M | 0.02% | +4,142+12.0% | Added |
| Legal & General Group Plc | 37,748 | $2.58M | 0.00% | +1,389+3.8% | Added |
| Moody Aldrich Partners LLC | 37,599 | $2.57M | 0.50% | −162−0.4% | Reduced |
| Hillsdale Investment Management Inc. | 37,400 | $2.55M | 0.23% | −27,600−42.5% | Reduced |
| State of New Jersey Common Pension Fund D | 36,065 | $2.46M | 0.01% | −8,494−19.1% | Reduced |
| Macquarie Group Ltd | 34,369 | $2.35M | 0.00% | +5,800+20.3% | Added |
| Millennium Management LLC | 33,100 | $2.26M | 0.00% | −161,539−83.0% | Reduced |
| New York State Common Retirement Fund | 31,175 | $2.13M | 0.00% | −400−1.3% | Reduced |
| Federated Hermes, Inc. | 30,856 | $2.11M | 0.01% | +29,850+2,967.2% | Added |
| Thornburg Investment Management Inc | 29,011 | $1.98M | 0.03% | −632−2.1% | Reduced |
| BNP Paribas Arbitrage, SA | 27,207 | $1.86M | 0.00% | −28,818−51.4% | Reduced |
| Victory Capital Management Inc | 26,307 | $1.80M | 0.00% | +6,696+34.1% | Added |
| Edgewood Management LLC | 24,060 | $1.64M | 0.00% | 00.0% | Unchanged |
| Jump Financial, LLC | 23,631 | $1.61M | 0.06% | −9,340−28.3% | Reduced |
| Prudential Financial Inc | 22,911 | $1.56M | 0.00% | +4,950+27.6% | Added |
| Susquehanna International Group, LLP | 22,530 | $1.54M | 0.00% | −38,861−63.3% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 22,430 | $1.53M | 0.00% | −1,388−5.8% | Reduced |
| UBS Group AG | 22,375 | $1.53M | 0.00% | −39,268−63.7% | Reduced |
| Fred Alger Management, LLC | 22,064 | $1.51M | 0.01% | +745+3.5% | Added |