BLUEBIRD BIO INC

CUSIP: 09609G100 Class: Common Stock

Artisan Partners Limited Partnership's Holding History (CIK: 0001466153)

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

Q1 2016
Shares 94,891 Value ($000) $4,033 Avg Close — Range —
Q4 2015
Shares 96,418 Value ($000) $6,192 Avg Close — Range —
Q3 2015
Shares 98,795 Value ($000) $8,452 Avg Close — Range —
Q2 2015
Shares 64,639 Value ($000) $10,883 Avg Close — Range —
Q1 2015
Shares 74,573 Value ($000) $9,006 Avg Close — Range —
Q4 2014
Shares 79,021 Value ($000) $7,248 Avg Close — Range —