DAY ONE BIOPHARMACEUTICALS I

Ticker: DAWN CUSIP: 23954D109 Class: Common Stock

Optiver Holding B.V.'s Holding History (CIK: 0001859606)

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

Q4 2025

Shares 292 Value ($000) $3 Avg Close $8.35 Range $6.70 - $10.90

Q3 2025

Shares 1,012 Value ($000) $7 Avg Close $6.88 Range $5.63 - $7.74

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	292	$3	$8.35	$6.70 - $10.90
Q3 2025	1,012	$7	$6.88	$5.63 - $7.74