BLUEBIRD BIO INC's ticker is BLUE and the CUSIP is 09609G100. A total of 177 filers reported holding BLUEBIRD BIO INC in Q4 2021. The put-call ratio across all filers is 1.00 and the average weighting 0.0%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q2 2022 | $209,000 | -11.4% | 50,497 | +3.6% | 0.03% | +3.7% |
| Q1 2022 | $236,000 | -4.1% | 48,724 | +97.8% | 0.03% | -3.6% |
| Q4 2021 | $246,000 | +1.7% | 24,639 | +94.4% | 0.03% | -9.7% |
| Q3 2021 | $242,000 | – | 12,673 | +253360.0% | 0.03% | – |
| Q1 2020 | $0 | -100.0% | 5 | -98.4% | 0.00% | -100.0% |
| Q4 2017 | $57,000 | – | 321 | – | 0.05% | – |
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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% |