PROTHENA CORP PLC's ticker is PRTA and the CUSIP is G72800108. A total of 189 filers reported holding PROTHENA CORP PLC in Q1 2023. The put-call ratio across all filers is 0.56 and the average weighting 0.4%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q1 2023 | $24 | -20.0% | 500 | -64.3% | 0.00% | -33.3% |
| Q4 2022 | $30 | -99.9% | 1,400 | -80.3% | 0.00% | 0.0% |
| Q3 2022 | $48,000 | +17.1% | 7,100 | -5.3% | 0.00% | +50.0% |
| Q3 2021 | $41,000 | +86.4% | 7,500 | -10.7% | 0.00% | +100.0% |
| Q2 2021 | $22,000 | – | 8,400 | +4100.0% | 0.00% | – |
| Q2 2020 | $0 | – | 200 | 0.0% | 0.00% | – |
| Q1 2020 | $0 | -100.0% | 200 | -99.7% | 0.00% | -100.0% |
| Q3 2018 | $302,000 | +439.3% | 60,500 | +487.4% | 0.02% | +425.0% |
| Q2 2018 | $56,000 | -88.8% | 10,300 | -67.7% | 0.00% | -90.7% |
| Q1 2018 | $500,000 | +17.9% | 31,917 | +51.7% | 0.04% | +152.9% |
| Q4 2017 | $424,000 | -8.2% | 21,043 | +23.3% | 0.02% | 0.0% |
| Q3 2017 | $462,000 | +463.4% | 17,066 | +59.5% | 0.02% | +466.7% |
| Q2 2017 | $82,000 | -92.5% | 10,700 | -76.3% | 0.00% | -93.3% |
| Q1 2017 | $1,099,000 | +42.0% | 45,241 | -14.7% | 0.04% | +60.7% |
| Q4 2016 | $774,000 | -52.8% | 53,014 | -48.6% | 0.03% | -62.2% |
| Q3 2016 | $1,640,000 | +58.6% | 103,123 | +13.4% | 0.07% | +42.3% |
| Q2 2016 | $1,034,000 | +115.0% | 90,922 | +50.5% | 0.05% | +62.5% |
| Q1 2016 | $481,000 | -73.8% | 60,416 | -29.8% | 0.03% | -68.6% |
| Q4 2015 | $1,834,000 | – | 86,012 | – | 0.10% | – |
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Other shareholders
| Name | Shares | Value | Weighting ↓ |
|---|---|---|---|
| EcoR1 Capital, LLC | 11,584,280 | $697,952,870 | 21.24% |
| Prosight Management, LP | 330,000 | $19,882,500 | 10.84% |
| First Light Asset Management, LLC | 1,535,599 | $92,519,840 | 8.59% |
| Palo Alto Investors LP | 1,658,577 | $99,929,264 | 8.52% |
| Finepoint Capital LP | 322,900 | $19,455 | 6.29% |
| Birchview Capital, LP | 127,195 | $7,663 | 5.41% |
| Avidity Partners Management LP | 2,953,000 | $177,918,250 | 3.85% |
| DCF Advisers, LLC | 74,100 | $4,464,525 | 3.02% |
| PFM Health Sciences, LP | 875,464 | $52,746,706 | 1.89% |
| SECTORAL ASSET MANAGEMENT INC | 115,200 | $6,940,800 | 1.34% |