BLUEBIRD BIO INC

CUSIP: 09609G100 Class: Common Stock

NORTHWESTERN MUTUAL INVESTMENT MANAGEMENT COMPANY, LLC's Holding History (CIK: 0001629649)

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

Q4 2015
Shares 4,222 Value ($000) $271 Avg Close — Range —
Q3 2015
Shares 3,860 Value ($000) $330 Avg Close — Range —
Q2 2015
Shares 3,860 Value ($000) $650 Avg Close — Range —