PROTHENA CORP PLC's ticker is PRTA and the CUSIP is G72800108. A total of 146 filers reported holding PROTHENA CORP PLC in Q1 2021. The put-call ratio across all filers is 0.25 and the average weighting 0.2%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q4 2021 | $1,171,000 | +370.3% | 23,711 | +578.2% | 0.00% | – |
| Q3 2021 | $249,000 | -84.8% | 3,496 | -94.6% | 0.00% | -100.0% |
| Q1 2021 | $1,634,000 | +46.9% | 65,119 | -29.7% | 0.00% | +50.0% |
| Q4 2020 | $1,112,000 | +15.8% | 92,656 | -3.8% | 0.00% | 0.0% |
| Q3 2020 | $960,000 | -17.7% | 96,293 | -13.8% | 0.00% | -33.3% |
| Q2 2020 | $1,166,000 | +16.7% | 111,734 | +19.5% | 0.00% | 0.0% |
| Q1 2020 | $999,000 | -21.6% | 93,518 | +16.0% | 0.00% | +50.0% |
| Q4 2019 | $1,275,000 | +197.9% | 80,613 | +47.6% | 0.00% | +100.0% |
| Q3 2019 | $428,000 | -36.2% | 54,600 | -14.0% | 0.00% | 0.0% |
| Q2 2019 | $671,000 | -29.8% | 63,464 | -19.5% | 0.00% | -50.0% |
| Q1 2019 | $956,000 | +61.2% | 78,851 | +37.0% | 0.00% | +100.0% |
| Q4 2018 | $593,000 | -12.3% | 57,550 | +11.3% | 0.00% | 0.0% |
| Q3 2018 | $676,000 | +44.8% | 51,711 | +61.3% | 0.00% | 0.0% |
| Q2 2018 | $467,000 | -60.3% | 32,064 | 0.0% | 0.00% | -50.0% |
| Q1 2018 | $1,177,000 | +40.1% | 32,064 | +45.0% | 0.00% | +100.0% |
| Q4 2017 | $840,000 | -65.2% | 22,109 | -40.8% | 0.00% | -75.0% |
| Q3 2017 | $2,417,000 | +31.8% | 37,325 | +10.2% | 0.00% | +33.3% |
| Q2 2017 | $1,834,000 | +173.3% | 33,876 | +181.6% | 0.00% | +200.0% |
| Q1 2017 | $671,000 | +27.1% | 12,030 | +12.8% | 0.00% | 0.0% |
| Q4 2016 | $528,000 | – | 10,661 | – | 0.00% | – |
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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% |