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 | ||||
|---|---|---|---|---|---|---|
| Q4 2021 | $263,000 | +526.2% | 5,338 | +789.7% | 0.02% | +600.0% |
| Q3 2021 | $42,000 | -31.1% | 600 | -75.5% | 0.00% | -50.0% |
| Q1 2021 | $61,000 | +144.0% | 2,451 | +16.7% | 0.01% | +100.0% |
| Q4 2020 | $25,000 | -56.1% | 2,100 | -61.1% | 0.00% | -50.0% |
| Q2 2019 | $57,000 | -49.1% | 5,400 | -37.2% | 0.01% | -25.0% |
| Q3 2018 | $112,000 | -0.9% | 8,595 | +10.2% | 0.01% | 0.0% |
| Q2 2018 | $113,000 | +2.7% | 7,798 | +159.7% | 0.01% | -11.1% |
| Q1 2018 | $110,000 | -38.5% | 3,003 | -37.4% | 0.01% | -47.1% |
| Q4 2017 | $179,000 | +2883.3% | 4,794 | +4380.4% | 0.02% | +1600.0% |
| Q3 2017 | $6,000 | -94.1% | 107 | -94.3% | 0.00% | -90.0% |
| Q2 2017 | $101,000 | +676.9% | 1,870 | +672.7% | 0.01% | +900.0% |
| Q1 2017 | $13,000 | -45.8% | 242 | -41.3% | 0.00% | -66.7% |
| Q3 2016 | $24,000 | +26.3% | 412 | -25.4% | 0.00% | +50.0% |
| Q2 2016 | $19,000 | -74.7% | 552 | -72.0% | 0.00% | -89.5% |
| Q1 2015 | $75,000 | +66.7% | 1,971 | +64.2% | 0.02% | +72.7% |
| Q1 2014 | $45,000 | – | 1,200 | – | 0.01% | – |
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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% |