DAY ONE BIOPHARMACEUTICALS I

Ticker: DAWN CUSIP: 23954D109 Class: Common Stock

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

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

Q4 2025

Shares 81 Value ($000) $1 Avg Close $8.35 Range $6.70 - $10.90

Q3 2025

Shares 81 Value ($000) $1 Avg Close $6.88 Range $5.63 - $7.74

Q2 2025

Shares 79 Value ($000) $1 Avg Close $6.88 Range $6.08 - $8.14

Q1 2025

Shares 79 Value ($000) $1 Avg Close $10.77 Range $7.54 - $13.53

Q4 2024

Shares 79 Value ($000) $1 Avg Close $13.91 Range $12.11 - $16.76

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	81	$1	$8.35	$6.70 - $10.90
Q3 2025	81	$1	$6.88	$5.63 - $7.74
Q2 2025	79	$1	$6.88	$6.08 - $8.14
Q1 2025	79	$1	$10.77	$7.54 - $13.53
Q4 2024	79	$1	$13.91	$12.11 - $16.76