DAY ONE BIOPHARMACEUTICALS I

Ticker: DAWN CUSIP: 23954D109 Class: Common Stock

Mariner, LLC's Holding History (CIK: 0001373442)

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

Q4 2025

Shares 31,167 Value ($000) $290 Avg Close $8.35 Range $6.70 - $10.90

Q1 2025

Shares 14,885 Value ($000) $118 Avg Close $10.77 Range $7.54 - $13.53

Q4 2024

Shares 11,669 Value ($000) $148 Avg Close $13.91 Range $12.11 - $16.76

Q3 2024

Shares 22,045 Value ($000) $307 Avg Close $14.27 Range $12.53 - $16.75

Q2 2024

Shares 10,027 Value ($000) $138 Avg Close $14.63 Range $11.94 - $18.07

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	31,167	$290	$8.35	$6.70 - $10.90
Q1 2025	14,885	$118	$10.77	$7.54 - $13.53
Q4 2024	11,669	$148	$13.91	$12.11 - $16.76
Q3 2024	22,045	$307	$14.27	$12.53 - $16.75
Q2 2024	10,027	$138	$14.63	$11.94 - $18.07