BLUEBIRD BIO INC's ticker is BLUE and the CUSIP is 09609G100. A total of 306 filers reported holding BLUEBIRD BIO INC in Q1 2018. The put-call ratio across all filers is 0.94 and the average weighting 0.1%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q2 2018 | $412,000 | +2.5% | 2,624 | +11.3% | 0.35% | -8.3% |
| Q1 2018 | $402,000 | -3.4% | 2,357 | +1.0% | 0.39% | -7.9% |
| Q4 2017 | $416,000 | +48.6% | 2,334 | +14.6% | 0.42% | +31.8% |
| Q3 2017 | $280,000 | -74.5% | 2,036 | -80.5% | 0.32% | -43.0% |
| Q2 2017 | $1,096,000 | +15.9% | 10,436 | +0.3% | 0.56% | +7.3% |
| Q1 2017 | $946,000 | +31.6% | 10,409 | -10.7% | 0.52% | +28.7% |
| Q4 2016 | $719,000 | +28.9% | 11,650 | +41.5% | 0.40% | +103.0% |
| Q3 2016 | $558,000 | +55700.0% | 8,234 | +137133.3% | 0.20% | – |
| Q2 2015 | $1,000 | – | 6 | – | 0.00% | – |
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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% |