ATARA BIOTHERAPEUTICS INC

CUSIP: 046513107 Class: Common Stock

RTW INVESTMENTS, LP's Holding History (CIK: 0001493215)

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

Q4 2017
Shares 556,118 Value ($000) $10,066 Avg Close — Range —
Q3 2017
Shares 656,018 Value ($000) $10,857 Avg Close — Range —
Q2 2017
Shares 1,172,744 Value ($000) $16,418 Avg Close — Range —
Q1 2017
Shares 908,733 Value ($000) $18,674 Avg Close — Range —
Q4 2016
Shares 372,624 Value ($000) $5,291 Avg Close — Range —
Q2 2016
Shares 465,874 Value ($000) $10,487 Avg Close — Range —
Q1 2016
Shares 473,126 Value ($000) $9,004 Avg Close — Range —
Q4 2015
Shares 433,923 Value ($000) $11,460 Avg Close — Range —