ATARA BIOTHERAPEUTICS INC

CUSIP: 046513107 Class: Common Stock

HBK INVESTMENTS L P's Holding History (CIK: 0001011443)

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

Q2 2018
Shares 14,600 Value ($000) $537 Avg Close — Range —
Q1 2018
Shares 12,969 Value ($000) $506 Avg Close — Range —