BLUEBIRD BIO INC

CUSIP: 09609G100 Class: Common Stock

Cormorant Asset Management, LP's Holding History (CIK: 0001583977)

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

Q4 2017
Shares 80,000 Value ($000) $14,248 Avg Close — Range —
Q3 2017
Shares 137,500 Value ($000) $18,886 Avg Close — Range —
Q2 2017
Shares 275,000 Value ($000) $28,889 Avg Close — Range —