PROTHENA CORP PLC's ticker is PRTA and the CUSIP is G72800108. A total of 140 filers reported holding PROTHENA CORP PLC in Q4 2020. The put-call ratio across all filers is 0.56 and the average weighting 0.1%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q2 2022 | $163,000 | +11.6% | 6,000 | +50.0% | 0.05% | +56.7% |
| Q1 2022 | $146,000 | -1.4% | 4,000 | +33.3% | 0.03% | +3.4% |
| Q4 2021 | $148,000 | +4.2% | 3,000 | +50.0% | 0.03% | -6.5% |
| Q3 2021 | $142,000 | +22.4% | 2,000 | 0.0% | 0.03% | +24.0% |
| Q2 2021 | $116,000 | +132.0% | 2,000 | 0.0% | 0.02% | +108.3% |
| Q1 2021 | $50,000 | +108.3% | 2,000 | 0.0% | 0.01% | +140.0% |
| Q4 2020 | $24,000 | -25.0% | 2,000 | 0.0% | 0.01% | -44.4% |
| Q4 2019 | $32,000 | +100.0% | 2,000 | 0.0% | 0.01% | +50.0% |
| Q3 2019 | $16,000 | -23.8% | 2,000 | 0.0% | 0.01% | -14.3% |
| Q2 2019 | $21,000 | -12.5% | 2,000 | 0.0% | 0.01% | -30.0% |
| Q1 2019 | $24,000 | +14.3% | 2,000 | 0.0% | 0.01% | +11.1% |
| Q4 2018 | $21,000 | -19.2% | 2,000 | 0.0% | 0.01% | -10.0% |
| Q3 2018 | $26,000 | -10.3% | 2,000 | 0.0% | 0.01% | -9.1% |
| Q2 2018 | $29,000 | -60.3% | 2,000 | 0.0% | 0.01% | -66.7% |
| Q1 2018 | $73,000 | -2.7% | 2,000 | 0.0% | 0.03% | -17.5% |
| Q4 2017 | $75,000 | -53.7% | 2,000 | -20.0% | 0.04% | -42.9% |
| Q3 2017 | $162,000 | +92.9% | 2,500 | +66.7% | 0.07% | +7.7% |
| Q1 2017 | $84,000 | – | 1,500 | – | 0.06% | – |
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Other shareholders
| Name | Shares | Value | Weighting ↓ |
|---|---|---|---|
| EcoR1 Capital, LLC | 11,584,280 | $558,941,510 | 18.85% |
| Finepoint Capital LP | 349,300 | $16,853,725 | 8.39% |
| Palo Alto Investors LP | 1,657,458 | $79,972,349 | 7.57% |
| Birchview Capital, LP | 169,574 | $8,181,946 | 6.96% |
| First Light Asset Management, LLC | 1,494,039 | $72,087,382 | 6.85% |
| DCF Advisers, LLC | 82,950 | $4,002,338 | 2.18% |
| Prosight Management, LP | 126,202 | $6,089,247 | 1.93% |
| PFM Health Sciences, LP | 836,571 | $40,364,551 | 1.90% |
| SECTORAL ASSET MANAGEMENT INC | 172,407 | $8,318,638 | 1.62% |
| Boxer Capital, LLC | 625,000 | $30,156,250 | 1.60% |