ATARA BIOTHERAPEUTICS INC

CUSIP: 046513107 Class: Common Stock

MACKAY SHIELDS LLC's Holding History (CIK: 0000061227)

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

Q1 2021
Shares 45,492 Value ($000) $653 Avg Close — Range —
Q4 2020
Shares 69,531 Value ($000) $1,365 Avg Close — Range —
Q3 2020
Shares 83,631 Value ($000) $1,083 Avg Close — Range —
Q2 2020
Shares 96,531 Value ($000) $1,406 Avg Close — Range —
Q1 2020
Shares 83,731 Value ($000) $713 Avg Close — Range —
Q4 2019
Shares 71,431 Value ($000) $1,177 Avg Close — Range —
Q3 2019
Shares 67,331 Value ($000) $951 Avg Close — Range —
Q2 2019
Shares 53,231 Value ($000) $1,071 Avg Close — Range —
Q1 2019
Shares 15,992 Value ($000) $636 Avg Close — Range —
Q4 2018
Shares 15,492 Value ($000) $538 Avg Close — Range —
Q2 2018
Shares 13,400 Value ($000) $493 Avg Close — Range —