BLUEBIRD BIO INC's ticker is BLUE and the CUSIP is 09609G100. A total of 255 filers reported holding BLUEBIRD BIO INC in Q4 2018. The put-call ratio across all filers is 0.54 and the average weighting 0.1%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q1 2020 | $319,000 | -47.5% | 6,930 | 0.0% | 0.01% | -30.0% |
| Q4 2019 | $608,000 | -4.4% | 6,930 | 0.0% | 0.01% | -16.7% |
| Q3 2019 | $636,000 | -41.4% | 6,930 | -18.8% | 0.01% | -45.5% |
| Q2 2019 | $1,085,000 | -19.2% | 8,530 | 0.0% | 0.02% | -26.7% |
| Q1 2019 | $1,342,000 | +46.5% | 8,530 | -7.6% | 0.03% | +25.0% |
| Q4 2018 | $916,000 | -63.7% | 9,230 | -46.5% | 0.02% | -35.1% |
| Q3 2018 | $2,520,000 | +119.1% | 17,260 | +135.5% | 0.04% | +54.2% |
| Q2 2018 | $1,150,000 | +3.1% | 7,330 | +12.3% | 0.02% | -4.0% |
| Q1 2018 | $1,115,000 | +38.2% | 6,530 | +44.2% | 0.02% | +150.0% |
| Q4 2017 | $807,000 | – | 4,530 | – | 0.01% | – |
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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% |