BLUEBIRD BIO INC

CUSIP: 09609G100 Class: Common Stock

SANDS CAPITAL MANAGEMENT, LLC's Holding History (CIK: 0001020066)

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

Q4 2020
Shares 3,163,651 Value ($000) $136,891 Avg Close — Range —
Q3 2020
Shares 3,195,715 Value ($000) $172,409 Avg Close — Range —
Q2 2020
Shares 3,130,551 Value ($000) $191,089 Avg Close — Range —
Q1 2020
Shares 3,120,096 Value ($000) $143,400 Avg Close — Range —
Q4 2019
Shares 3,176,644 Value ($000) $278,751 Avg Close — Range —
Q3 2019
Shares 2,180,163 Value ($000) $200,183 Avg Close — Range —
Q2 2019
Shares 1,108,534 Value ($000) $141,006 Avg Close — Range —