ATARA BIOTHERAPEUTICS INC

CUSIP: 046513107 Class: Common Stock

BAMCO INC /NY/'s Holding History (CIK: 0001017918)

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

Q3 2015
Shares 764,988 Value ($000) $24,051 Avg Close — Range —
Q2 2015
Shares 7,000 Value ($000) $369 Avg Close — Range —
Q1 2015
Shares 120,844 Value ($000) $5,023 Avg Close — Range —