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 2023 | $0 | -100.0% | 100 | -88.2% | 0.00% | – |
| Q4 2022 | $6 | -99.9% | 851 | +5.2% | 0.00% | – |
| Q3 2022 | $5,000 | +66.7% | 809 | -2.3% | 0.00% | – |
| Q2 2022 | $3,000 | 0.0% | 828 | +58.9% | 0.00% | – |
| Q1 2022 | $3,000 | – | 521 | +1528.1% | 0.00% | – |
| Q4 2021 | $0 | -100.0% | 32 | -88.4% | 0.00% | – |
| Q2 2021 | $9,000 | 0.0% | 275 | 0.0% | 0.00% | – |
| Q1 2021 | $9,000 | 0.0% | 275 | 0.0% | 0.00% | – |
| Q4 2020 | $9,000 | 0.0% | 275 | 0.0% | 0.00% | – |
| Q3 2020 | $9,000 | 0.0% | 275 | 0.0% | 0.00% | – |
| Q2 2020 | $9,000 | 0.0% | 275 | 0.0% | 0.00% | – |
| Q1 2020 | $9,000 | 0.0% | 275 | 0.0% | 0.00% | – |
| Q4 2019 | $9,000 | 0.0% | 275 | 0.0% | 0.00% | – |
| Q3 2019 | $9,000 | 0.0% | 275 | 0.0% | 0.00% | – |
| Q2 2019 | $9,000 | 0.0% | 275 | 0.0% | 0.00% | – |
| Q1 2019 | $9,000 | +200.0% | 275 | +759.4% | 0.00% | – |
| Q4 2018 | $3,000 | -40.0% | 32 | 0.0% | 0.00% | – |
| Q3 2018 | $5,000 | 0.0% | 32 | 0.0% | 0.00% | – |
| Q2 2018 | $5,000 | 0.0% | 32 | 0.0% | 0.00% | – |
| Q1 2018 | $5,000 | -16.7% | 32 | 0.0% | 0.00% | – |
| Q4 2017 | $6,000 | +50.0% | 32 | 0.0% | 0.00% | – |
| Q3 2017 | $4,000 | +33.3% | 32 | -36.0% | 0.00% | – |
| Q4 2016 | $3,000 | – | 50 | – | 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% |