BLUEBIRD BIO INC's ticker is BLUE and the CUSIP is 09609G100. A total of 238 filers reported holding BLUEBIRD BIO INC in Q1 2021. The put-call ratio across all filers is 1.69 and the average weighting 0.1%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q4 2020 | $4,105,000 | -30.1% | 94,861 | -12.8% | 0.04% | -42.9% |
| Q3 2020 | $5,869,000 | -11.6% | 108,787 | 0.0% | 0.06% | -20.3% |
| Q2 2020 | $6,640,000 | +58.0% | 108,787 | +19.0% | 0.08% | +5.3% |
| Q1 2020 | $4,202,000 | -35.6% | 91,432 | +23.0% | 0.08% | +36.4% |
| Q4 2019 | $6,526,000 | +44.1% | 74,365 | +50.7% | 0.06% | +27.9% |
| Q3 2019 | $4,530,000 | +48.8% | 49,338 | +106.2% | 0.04% | +53.6% |
| Q2 2019 | $3,044,000 | – | 23,933 | – | 0.03% | – |
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Other shareholders
| Name | Shares | Value | Weighting ↓ |
|---|---|---|---|
| TANG CAPITAL MANAGEMENT LLC | 4,282,827 | $13,019,794 | 1.84% |
| Birchview Capital, LP | 455,200 | $1,383,808 | 1.18% |
| PFM Health Sciences, LP | 6,040,934 | $18,364,439 | 0.86% |
| Lion Point Capital, LP | 531,256 | $1,615,018 | 0.72% |
| Endurant Capital Management LP | 251,785 | $765,426 | 0.69% |
| Bleichroeder LP | 900,000 | $2,736,000 | 0.67% |
| Connacht Asset Management LP | 31,634 | $96,167 | 0.57% |
| Granahan Investment Management | 5,137,778 | $15,618,845 | 0.56% |
| Frazier Life Sciences Management, L.P. | 1,709,907 | $5,198,117 | 0.34% |
| Contrarius Investment Management Ltd | 1,308,002 | $3,976 | 0.22% |