BLUEBIRD BIO INC

CUSIP: 09609G100 Class: Common Stock

AXIOM INVESTORS LLC /DE's Holding History (CIK: 0001109147)

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

Q2 2015
Shares 14,692 Value ($000) $2,474 Avg Close — Range —
Q1 2015
Shares 15,922 Value ($000) $1,923 Avg Close — Range —