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 | ||||
|---|---|---|---|---|---|---|
| Q3 2018 | $10,950,000 | -33.6% | 75,000 | -28.6% | 2.33% | -52.0% |
| Q2 2018 | $16,480,000 | +790.3% | 105,000 | +250.0% | 4.85% | +989.9% |
| Q4 2016 | $1,851,000 | -54.5% | 30,000 | -50.0% | 0.44% | -32.6% |
| Q3 2016 | $4,067,000 | -44.7% | 60,000 | -64.7% | 0.66% | -68.9% |
| Q2 2016 | $7,359,000 | -4.5% | 170,000 | +41.7% | 2.12% | -32.6% |
| Q4 2015 | $7,706,000 | +6.3% | 120,000 | +100.0% | 3.16% | +142.1% |
| Q1 2015 | $7,246,000 | +163.3% | 60,000 | +100.0% | 1.30% | -1.4% |
| Q4 2014 | $2,752,000 | +119.1% | 30,000 | -14.3% | 1.32% | +93.7% |
| Q3 2014 | $1,256,000 | – | 35,000 | – | 0.68% | – |
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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% |