BLUEBIRD BIO INC's ticker is BLUE and the CUSIP is 09609G100. A total of 238 filers reported holding BLUEBIRD BIO INC in Q1 2021. The put-call ratio across all filers is 1.69 and the average weighting 0.1%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q1 2021 | $623,000 | 0.0% | 14,406 | 0.0% | 0.14% | +0.7% |
| Q4 2020 | $623,000 | +126.5% | 14,406 | +182.1% | 0.14% | +140.7% |
| Q3 2020 | $275,000 | -84.0% | 5,106 | -59.2% | 0.06% | -71.9% |
| Q3 2017 | $1,718,000 | +1490.7% | 12,511 | +393.5% | 0.21% | +356.5% |
| Q1 2016 | $108,000 | -40.0% | 2,535 | +20.7% | 0.05% | -70.7% |
| Q3 2015 | $180,000 | +429.4% | 2,100 | +950.0% | 0.16% | +292.5% |
| Q2 2015 | $34,000 | -29.2% | 200 | -50.0% | 0.04% | -50.0% |
| Q1 2015 | $48,000 | -75.1% | 400 | -81.0% | 0.08% | -75.1% |
| Q4 2014 | $193,000 | – | 2,100 | – | 0.32% | – |
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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% |