BLUEBIRD BIO INC

CUSIP: 09609G100 Class: Common Stock

COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS's Holding History (CIK: 0001083190)

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

Q4 2014
Shares 4,475 Value ($000) $410 Avg Close — Range —
Q3 2014
Shares 11,170 Value ($000) $401 Avg Close — Range —