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 | ||||
|---|---|---|---|---|---|---|
| Q1 2021 | $731,000 | -30.5% | 24,251 | -0.2% | 0.01% | -28.6% |
| Q4 2020 | $1,052,000 | -19.6% | 24,311 | +0.2% | 0.01% | -30.0% |
| Q3 2020 | $1,308,000 | -9.7% | 24,251 | +2.2% | 0.01% | -16.7% |
| Q2 2020 | $1,449,000 | +38.7% | 23,731 | +4.4% | 0.01% | +33.3% |
| Q1 2020 | $1,045,000 | -10.4% | 22,736 | +71.1% | 0.01% | -10.0% |
| Q4 2019 | $1,166,000 | -3.6% | 13,286 | +0.8% | 0.01% | -9.1% |
| Q3 2019 | $1,210,000 | -64.9% | 13,176 | -51.4% | 0.01% | -47.6% |
| Q2 2019 | $3,447,000 | -8.7% | 27,102 | +12.9% | 0.02% | -12.5% |
| Q1 2019 | $3,776,000 | +59.9% | 24,000 | +0.8% | 0.02% | +41.2% |
| Q4 2018 | $2,362,000 | -31.7% | 23,808 | +0.6% | 0.02% | -22.7% |
| Q3 2018 | $3,457,000 | +73.3% | 23,677 | +86.3% | 0.02% | +4.8% |
| Q2 2018 | $1,995,000 | – | 12,708 | – | 0.02% | – |
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Other shareholders
| Name | Shares | Value | Weighting ↓ |
|---|---|---|---|
| Third Rock Ventures, LLC | 3,313,974 | $78,939,000 | 22.36% |
| HARBOURVEST PARTNERS LLC | 59,264 | $1,243,000 | 3.98% |
| RA Capital Management | 467,418 | $9,806,000 | 1.14% |
| HAMILTON LANE ADVISORS LLC | 88,628 | $1,859,000 | 1.08% |
| COWEN INC. | 158,709 | $3,330,000 | 0.56% |
| SPHERA FUNDS MANAGEMENT LTD. | 92,435 | $1,939,000 | 0.54% |
| DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C) | 423,224 | $8,879,000 | 0.46% |
| Camber Capital Management LP | 206,900 | $4,341,000 | 0.38% |
| Eventide Asset Management | 25,700 | $539,000 | 0.17% |
| SABBY MANAGEMENT, LLC | 102,035 | $2,141,000 | 0.14% |