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 | ||||
|---|---|---|---|---|---|---|
| Q3 2023 | $171,696 | +6.6% | 66,469 | +35.7% | 0.00% | 0.0% |
| Q2 2023 | $161,124 | +281.7% | 48,974 | +269.0% | 0.00% | – |
| Q1 2023 | $42,208 | -62.4% | 13,273 | -18.3% | 0.00% | -100.0% |
| Q4 2022 | $112,374 | +20.8% | 16,239 | +10.6% | 0.00% | 0.0% |
| Q3 2022 | $93,000 | +86.0% | 14,679 | +22.5% | 0.00% | – |
| Q2 2022 | $50,000 | -18.0% | 11,979 | -4.5% | 0.00% | – |
| Q1 2022 | $61,000 | -60.1% | 12,538 | -18.0% | 0.00% | -100.0% |
| Q4 2021 | $153,000 | -56.2% | 15,298 | -16.2% | 0.00% | -66.7% |
| Q3 2021 | $349,000 | -54.3% | 18,266 | -23.4% | 0.00% | -57.1% |
| Q2 2021 | $763,000 | +26.1% | 23,850 | +18.9% | 0.01% | 0.0% |
| Q1 2021 | $605,000 | +11.4% | 20,065 | +59.8% | 0.01% | 0.0% |
| Q4 2020 | $543,000 | -31.7% | 12,555 | -14.9% | 0.01% | -46.2% |
| Q3 2020 | $795,000 | +16.1% | 14,754 | +31.5% | 0.01% | +18.2% |
| Q2 2020 | $685,000 | +112.7% | 11,218 | +48.0% | 0.01% | +57.1% |
| Q1 2020 | $322,000 | -39.2% | 7,581 | +23.4% | 0.01% | -12.5% |
| Q4 2019 | $530,000 | +17566.7% | 6,141 | +38281.2% | 0.01% | – |
| Q2 2018 | $3,000 | – | 16 | – | 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% |