BLUEBIRD BIO INC

CUSIP: 09609G100 Class: Common Stock

ArrowMark Colorado Holdings LLC's Holding History (CIK: 0001483859)

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

Q4 2017
Shares 221,541 Value ($000) $39,456 Avg Close — Range —
Q3 2017
Shares 361,825 Value ($000) $49,697 Avg Close — Range —
Q2 2017
Shares 430,462 Value ($000) $45,220 Avg Close — Range —
Q1 2017
Shares 409,295 Value ($000) $37,205 Avg Close — Range —
Q4 2016
Shares 453,354 Value ($000) $27,972 Avg Close — Range —
Q3 2016
Shares 396,897 Value ($000) $26,902 Avg Close — Range —
Q2 2016
Shares 560,164 Value ($000) $24,249 Avg Close — Range —
Q1 2016
Shares 500,253 Value ($000) $21,261 Avg Close — Range —
Q4 2015
Shares 248,328 Value ($000) $15,948 Avg Close — Range —
Q2 2015
Shares 1,650 Value ($000) $278 Avg Close — Range —
Q2 2014
Shares 2,500 Value ($000) $96 Avg Close — Range —