Schedule 13G ownership disclosure
BLUEBIRD BIO INC
Security class unavailable · CUSIP: 09609G100
Event date: 2019-12-31
Legacy cover-page extraction is best effort and may not include every reporting person.
- Filing-level shares
- 7,548,613
- Percent of class
- 13.6400%
Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.
Source: SEC EDGAR filingFiling metadata
- Accession number
- 0000902219-20-000010
- Form type
- SC 13G
- Filer
- WELLINGTON MANAGEMENT GROUP LLP
- CIK
- CIK 902219
- Filed
- Jan 08, 2020
- Reporting period
- Dec 31, 2019
- Description
- Schedule 13G beneficial ownership