WELLINGTON MANAGEMENT GROUP LLP 13D and 13G filings for bluebird bio, Inc.:
- Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company's equity securities.
- Shares have been adjusted for stock splits.
| Reported DateTime | Transaction Date | Type | Company Symbol | Filed By Symbol | Shares Owned % Owned | Shares Vs. Prev Report | View |
| 2022-09-09 10:26 am Sale | 2022-08-31 | 13G | bluebird bio, Inc. BLUE | WELLINGTON MANAGEMENT GROUP LLP | 12,203 0.320% | -294,797 (-96.03%) | Filing |
| 2022-02-04 09:15 am Sale | 2021-12-31 | 13G | bluebird bio, Inc. BLUE | WELLINGTON MANAGEMENT GROUP LLP | 307,000 8.760% | -226,873 (-42.50%) | Filing |
| 2021-03-10 07:17 am Purchase | 2021-02-26 | 13G | bluebird bio, Inc. BLUE | WELLINGTON MANAGEMENT GROUP LLP | 533,873 10.300% | 120,918 (+29.28%) | Filing |
| 2021-01-11 09:10 am Sale | 2020-12-31 | 13G | bluebird bio, Inc. BLUE | WELLINGTON MANAGEMENT GROUP LLP | 412,956 8.060% | -169,797 (-29.14%) | Filing |