BLUEBIRD BIO INC

CUSIP: 09609G100 Class: Common Stock

Atika Capital Management LLC's Holding History (CIK: 0001599731)

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

Q3 2018
Shares 18,100 Value ($000) $2,642 Avg Close — Range —
Q2 2018
Shares 18,500 Value ($000) $2,904 Avg Close — Range —
Q1 2018
Shares 24,000 Value ($000) $4,098 Avg Close — Range —
Q4 2017
Shares 26,500 Value ($000) $4,720 Avg Close — Range —
Q3 2017
Shares 8,000 Value ($000) $1,099 Avg Close — Range —
Q2 2017
Shares 25,000 Value ($000) $2,627 Avg Close — Range —
Q1 2017
Shares 19,000 Value ($000) $1,727 Avg Close — Range —
Q2 2015
Shares 19,000 Value ($000) $3,199 Avg Close — Range —
Q1 2015
Shares 18,000 Value ($000) $2,174 Avg Close — Range —
Q4 2014
Shares 19,500 Value ($000) $1,789 Avg Close — Range —