BLUEBIRD BIO INC

CUSIP: 09609G100 Class: Common Stock

CONGRESS ASSET MANAGEMENT CO /MA's Holding History (CIK: 0000897378)

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

Q2 2018
Shares 4,875 Value ($000) $765 Avg Close — Range —
Q1 2018
Shares 9,115 Value ($000) $1,556 Avg Close — Range —
Q4 2017
Shares 8,894 Value ($000) $1,584 Avg Close — Range —
Q3 2017
Shares 15,909 Value ($000) $2,185 Avg Close — Range —