| SC 13G/A | 2022-07-11 | STATE STREET CORP | bluebird bio, Inc. | - | 2.6% | EDGAR |
| SC 13G/A | 2022-07-11 | VANGUARD GROUP INC | bluebird bio, Inc. | 3,506,909 | 4.9% | EDGAR |
| SC 13G | 2022-06-03 | TANG CAPITAL PARTNERS LP | bluebird bio, Inc. | 3,721,056 | 5.2% | EDGAR |
| SC 13G/A | 2022-04-11 | STATE STREET CORP | bluebird bio, Inc. | - | 18.4% | EDGAR |
| SC 13G/A | 2022-02-09 | VANGUARD GROUP INC | bluebird bio, Inc. | 7,233,590 | 10.3% | EDGAR |
| SC 13G/A | 2022-02-04 | WELLINGTON MANAGEMENT GROUP LLP | bluebird bio, Inc. | 6,140,000 | 8.8% | EDGAR |
| SC 13G/A | 2022-02-03 | BlackRock Inc. | bluebird bio, Inc. | 5,912,002 | 8.4% | EDGAR |
| SC 13G | 2022-01-26 | FIRST TRUST PORTFOLIOS LP | bluebird bio, Inc. | 5,204,825 | 7.4% | EDGAR |
| SC 13G | 2022-01-10 | STATE STREET CORP | bluebird bio, Inc. | - | 10.9% | EDGAR |
| SC 13G/A | 2021-04-12 | VANGUARD GROUP INC | bluebird bio, Inc. | 6,797,519 | 10.1% | EDGAR |
| SC 13G/A | 2021-03-10 | WELLINGTON MANAGEMENT GROUP LLP | bluebird bio, Inc. | 6,915,454 | 10.3% | EDGAR |
| SC 13G/A | 2021-03-10 | Capital Research Global Investors | bluebird bio, Inc. | 0 | 0.0% | EDGAR |
| SC 13G/A | 2021-02-16 | Capital Research Global Investors | bluebird bio, Inc. | 8,128,284 | 12.2% | EDGAR |
| SC 13G/A | 2021-02-16 | Capital World Investors | bluebird bio, Inc. | 3,127,163 | 4.7% | EDGAR |
| SC 13G | 2021-02-16 | SANDS CAPITAL MANAGEMENT, LLC | bluebird bio, Inc. | 3,163,651 | 4.8% | EDGAR |
| SC 13G/A | 2021-02-10 | VANGUARD GROUP INC | bluebird bio, Inc. | 6,463,232 | 9.7% | EDGAR |
| SC 13G/A | 2021-01-29 | BlackRock Inc. | bluebird bio, Inc. | 3,861,648 | 5.8% | EDGAR |
| SC 13G/A | 2021-01-11 | WELLINGTON MANAGEMENT GROUP LLP | bluebird bio, Inc. | 5,349,165 | 8.1% | EDGAR |
| SC 13G/A | 2020-05-11 | FMR LLC | bluebird bio, Inc. | 1,379,603 | 2.5% | EDGAR |
| SC 13G/A | 2020-02-14 | Capital Research Global Investors | bluebird bio, Inc. | 6,779,133 | 12.2% | EDGAR |