ATARA BIOTHERAPEUTICS INC

Ticker: ATRA CUSIP: 046513206 Class: Common Stock

NORTHERN TRUST CORP's Holding History (CIK: 0000073124)

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

Q4 2025

Shares 12,340 Value ($000) $223 Avg Close $14.93 Range $10.50 - $18.95

Q3 2025

Shares 11,033 Value ($000) $158 Avg Close $11.51 Range $7.54 - $14.90

Q2 2025

Shares 11,170 Value ($000) $86 Avg Close $7.30 Range $5.00 - $9.68

Q1 2025

Shares 11,170 Value ($000) $66 Avg Close $8.73 Range $5.40 - $18.70

Q4 2024

Shares 11,170 Value ($000) $149 Avg Close $10.54 Range $7.20 - $14.93

Q2 2024

Shares 31,492 Value ($000) $268 Avg Close $15.04 Range $7.07 - $20.82

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	12,340	$223	$14.93	$10.50 - $18.95
Q3 2025	11,033	$158	$11.51	$7.54 - $14.90
Q2 2025	11,170	$86	$7.30	$5.00 - $9.68
Q1 2025	11,170	$66	$8.73	$5.40 - $18.70
Q4 2024	11,170	$149	$10.54	$7.20 - $14.93
Q2 2024	31,492	$268	$15.04	$7.07 - $20.82