BLUEBIRD BIO INC

CUSIP: 09609G100 Class: Common Stock

Rock Springs Capital Management LP's Holding History (CIK: 0001595725)

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

Q4 2019
Shares 35,000 Value ($000) $3,071 Avg Close — Range —
Q3 2019
Shares 47,000 Value ($000) $4,316 Avg Close — Range —
Q2 2019
Shares 47,000 Value ($000) $5,978 Avg Close — Range —
Q1 2019
Shares 45,000 Value ($000) $7,080 Avg Close — Range —
Q4 2018
Shares 45,000 Value ($000) $4,464 Avg Close — Range —
Q3 2018
Shares 52,500 Value ($000) $7,665 Avg Close — Range —
Q2 2018
Shares 45,000 Value ($000) $7,063 Avg Close — Range —
Q1 2018
Shares 45,000 Value ($000) $7,684 Avg Close — Range —
Q4 2017
Shares 45,000 Value ($000) $8,015 Avg Close — Range —
Q3 2017
Shares 35,000 Value ($000) $4,807 Avg Close — Range —
Q2 2017
Shares 32,000 Value ($000) $3,362 Avg Close — Range —
Q1 2017
Shares 30,500 Value ($000) $2,772 Avg Close — Range —
Q4 2016
Shares 28,500 Value ($000) $1,758 Avg Close — Range —
Q3 2016
Shares 20,000 Value ($000) $1,356 Avg Close — Range —
Q2 2016
Shares 20,000 Value ($000) $866 Avg Close — Range —
Q1 2016
Shares 20,000 Value ($000) $850 Avg Close — Range —
Q4 2015
Shares 20,000 Value ($000) $1,284 Avg Close — Range —
Q3 2015
Shares 45,000 Value ($000) $3,850 Avg Close — Range —
Q2 2015
Shares 45,000 Value ($000) $7,577 Avg Close — Range —
Q1 2015
Shares 25,000 Value ($000) $3,019 Avg Close — Range —
Q4 2014
Shares 25,000 Value ($000) $2,293 Avg Close — Range —