PROTHENA CORP PLC's ticker is PRTA and the CUSIP is G72800108. A total of 193 filers reported holding PROTHENA CORP PLC in Q3 2021. The put-call ratio across all filers is 0.62 and the average weighting 0.4%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q3 2023 | $2,742,675 | +34.1% | 56,843 | +34.7% | 0.07% | +23.2% |
| Q1 2023 | $2,045,434 | +8.7% | 42,200 | +35.1% | 0.06% | +5.7% |
| Q4 2022 | $1,882,029 | +549.0% | 31,237 | +432.5% | 0.05% | +194.4% |
| Q4 2021 | $290,000 | -23.1% | 5,866 | -19.9% | 0.02% | -43.8% |
| Q2 2021 | $377,000 | -19.8% | 7,326 | -84.4% | 0.03% | +6.7% |
| Q3 2020 | $470,000 | -17.0% | 47,039 | -13.1% | 0.03% | -23.1% |
| Q2 2020 | $566,000 | +180.2% | 54,141 | +175.4% | 0.04% | +200.0% |
| Q4 2018 | $202,000 | -32.9% | 19,657 | -14.5% | 0.01% | -43.5% |
| Q3 2018 | $301,000 | -69.0% | 22,999 | -13.1% | 0.02% | -66.2% |
| Q1 2018 | $972,000 | +159.9% | 26,465 | +247.6% | 0.07% | +15.3% |
| Q4 2016 | $374,000 | +47.8% | 7,613 | +80.7% | 0.06% | +5.4% |
| Q3 2016 | $253,000 | -64.6% | 4,213 | -79.4% | 0.06% | -40.4% |
| Q2 2016 | $714,000 | +138.0% | 20,419 | +179.9% | 0.09% | +168.6% |
| Q1 2016 | $300,000 | -26.3% | 7,295 | -62.8% | 0.04% | -51.4% |
| Q4 2014 | $407,000 | – | 19,636 | – | 0.07% | – |
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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% |