BLUEBIRD BIO INC's ticker is BLUE and the CUSIP is 09609G100. A total of 272 filers reported holding BLUEBIRD BIO INC in Q4 2020. The put-call ratio across all filers is 1.17 and the average weighting 0.1%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q2 2021 | $137,000 | +6.2% | 4,275 | 0.0% | 0.00% | 0.0% |
| Q1 2021 | $129,000 | -83.8% | 4,275 | -76.8% | 0.00% | -88.5% |
| Q4 2020 | $798,000 | +231.1% | 18,435 | +312.4% | 0.03% | +100.0% |
| Q3 2020 | $241,000 | -11.7% | 4,470 | 0.0% | 0.01% | -23.5% |
| Q2 2020 | $273,000 | +25.2% | 4,470 | -5.7% | 0.02% | -10.5% |
| Q1 2020 | $218,000 | -81.4% | 4,740 | -64.4% | 0.02% | -70.8% |
| Q4 2019 | $1,170,000 | -11.8% | 13,330 | -7.7% | 0.06% | +1.6% |
| Q3 2019 | $1,327,000 | +21.1% | 14,440 | +67.5% | 0.06% | +10.3% |
| Q2 2019 | $1,096,000 | -19.2% | 8,620 | 0.0% | 0.06% | -21.6% |
| Q1 2019 | $1,356,000 | +115.9% | 8,620 | +36.4% | 0.07% | +105.6% |
| Q4 2018 | $628,000 | -27.3% | 6,320 | +6.8% | 0.04% | -12.2% |
| Q3 2018 | $864,000 | -3.0% | 5,920 | +4.4% | 0.04% | -34.9% |
| Q2 2018 | $891,000 | +4589.5% | 5,670 | +2735.0% | 0.06% | – |
| Q4 2014 | $19,000 | +171.4% | 200 | 0.0% | 0.00% | – |
| Q3 2014 | $7,000 | – | 200 | – | 0.00% | – |
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Other shareholders
| Name | Shares | Value | Weighting ↓ |
|---|---|---|---|
| TANG CAPITAL MANAGEMENT LLC | 5,910,687 | $24,470,000 | 3.71% |
| Monaco Asset Management SAM | 306,142 | $1,267,000 | 0.55% |
| Parametrica Management Ltd | 90,105 | $374,000 | 0.41% |
| Kamunting Street Capital Management, L.P. | 55,200 | $229,000 | 0.31% |
| Birchview Capital, LP | 98,000 | $406,000 | 0.30% |
| Kamunting Street Capital Management, L.P. | 35,000 | $145,000 | 0.20% |
| PDT Partners, LLC | 519,477 | $2,151,000 | 0.19% |
| Graham Capital Management, L.P. | 781,912 | $3,237,000 | 0.13% |
| CAXTON ASSOCIATES LP | 220,154 | $911,000 | 0.09% |
| Baker Brothers Advisors | 2,499,715 | $10,349,000 | 0.06% |