ATARA BIOTHERAPEUTICS INC

Ticker: ATRA CUSIP: 046513206 Class: Common Stock

BlackRock, Inc.'s Holding History (CIK: 0002012383)

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

Q4 2025

Shares 67,108 Value ($000) $1,214 Avg Close $14.93 Range $10.50 - $18.95

Q3 2025

Shares 69,833 Value ($000) $1,001 Avg Close $11.51 Range $7.54 - $14.90

Q2 2025

Shares 70,848 Value ($000) $547 Avg Close $7.30 Range $5.00 - $9.68

Q1 2025

Shares 60,798 Value ($000) $361 Avg Close $8.73 Range $5.40 - $18.70

Q4 2024

Shares 60,846 Value ($000) $810 Avg Close $10.54 Range $7.20 - $14.93

Q3 2024

Shares 60,954 Value ($000) $496 Avg Close $8.56 Range $6.50 - $12.98

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	67,108	$1,214	$14.93	$10.50 - $18.95
Q3 2025	69,833	$1,001	$11.51	$7.54 - $14.90
Q2 2025	70,848	$547	$7.30	$5.00 - $9.68
Q1 2025	60,798	$361	$8.73	$5.40 - $18.70
Q4 2024	60,846	$810	$10.54	$7.20 - $14.93
Q3 2024	60,954	$496	$8.56	$6.50 - $12.98