BLUEBIRD BIO INC's ticker is BLUE and the CUSIP is 09609G100. A total of 306 filers reported holding BLUEBIRD BIO INC in Q1 2018. The put-call ratio across all filers is 0.94 and the average weighting 0.1%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q3 2018 | $292,000 | -7.0% | 2,000 | 0.0% | 0.02% | -11.1% |
| Q2 2018 | $314,000 | -61.7% | 2,000 | -58.3% | 0.02% | -57.1% |
| Q1 2018 | $820,000 | -75.1% | 4,800 | -74.1% | 0.04% | -72.2% |
| Q4 2017 | $3,295,000 | +3.0% | 18,500 | -20.6% | 0.15% | +7.1% |
| Q3 2017 | $3,200,000 | -9.7% | 23,300 | -40.3% | 0.14% | -21.7% |
| Q1 2017 | $3,545,000 | +7.4% | 39,000 | -27.1% | 0.18% | +16.1% |
| Q4 2016 | $3,301,000 | – | 53,500 | – | 0.16% | – |
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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% |