BLUEBIRD BIO INC

CUSIP: 09609G100 Class: Common Stock

MASSACHUSETTS FINANCIAL SERVICES CO /MA/'s Holding History (CIK: 0000912938)

Note: Option positions (PUT/CALL) are excluded.

Q4 2020
Shares 448,978 Value ($000) $19,427 Avg Close — Range —
Q3 2020
Shares 341,289 Value ($000) $18,413 Avg Close — Range —