ATARA BIOTHERAPEUTICS INC

CUSIP: 046513107 Class: Common Stock

Parallax Volatility Advisers, L.P.'s Holding History (CIK: 0001521001)

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

Q2 2019
Shares 99 Value ($000) $2 Avg Close — Range —
Q2 2018
Shares 311 Value ($000) $11 Avg Close — Range —
Q4 2017
Shares 3,948 Value ($000) $71 Avg Close — Range —
Q4 2015
Shares 11,759 Value ($000) $311 Avg Close — Range —