ATARA BIOTHERAPEUTICS INC

CUSIP: 046513107 Class: Common Stock

Aigen Investment Management, LP's Holding History (CIK: 0001741224)

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

Q4 2020
Shares 10,478 Value ($000) $206 Avg Close — Range —
Q3 2020
Shares 66,473 Value ($000) $861 Avg Close — Range —