ATARA BIOTHERAPEUTICS INC

Ticker: ATRA CUSIP: 046513206 Class: Common Stock

SBI Securities Co., Ltd.'s Holding History (CIK: 0001851815)

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

Q4 2025

Shares 1,404 Value ($000) $25 Avg Close $14.93 Range $10.50 - $18.95

Q3 2025

Shares 1,404 Value ($000) $20 Avg Close $11.51 Range $7.54 - $14.90

Q2 2025

Shares 1,404 Value ($000) $11 Avg Close $7.30 Range $5.00 - $9.68

Q1 2025

Shares 1,404 Value ($000) $8 Avg Close $8.73 Range $5.40 - $18.70

Q4 2024

Shares 1,416 Value ($000) $19 Avg Close $10.54 Range $7.20 - $14.93

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	1,404	$25	$14.93	$10.50 - $18.95
Q3 2025	1,404	$20	$11.51	$7.54 - $14.90
Q2 2025	1,404	$11	$7.30	$5.00 - $9.68
Q1 2025	1,404	$8	$8.73	$5.40 - $18.70
Q4 2024	1,416	$19	$10.54	$7.20 - $14.93