BLUEBIRD BIO INC's ticker is BLUE and the CUSIP is 09609G100. A total of 303 filers reported holding BLUEBIRD BIO INC in Q4 2017. The put-call ratio across all filers is 0.85 and the average weighting 0.2%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q1 2018 | $49,341,000 | -22.5% | 288,965 | -19.2% | 0.15% | -18.8% |
| Q4 2017 | $63,703,000 | +87.4% | 357,680 | +44.5% | 0.18% | +82.8% |
| Q3 2017 | $33,990,000 | +429.4% | 247,473 | +250.4% | 0.10% | +421.1% |
| Q1 2017 | $6,420,000 | -62.4% | 70,622 | -64.6% | 0.02% | -62.7% |
| Q3 2015 | $17,067,000 | -83.2% | 199,501 | -67.0% | 0.05% | -81.0% |
| Q2 2015 | $101,836,000 | +12.0% | 604,836 | -19.7% | 0.27% | +17.0% |
| Q1 2015 | $90,960,000 | +120.8% | 753,170 | +67.7% | 0.23% | +121.2% |
| Q4 2014 | $41,204,000 | +446.1% | 449,236 | +113.6% | 0.10% | +447.4% |
| Q3 2014 | $7,545,000 | -17.9% | 210,273 | -11.7% | 0.02% | +90.0% |
| Q2 2014 | $9,186,000 | – | 238,152 | – | 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% |