DAY ONE BIOPHARMACEUTICALS I

Ticker: DAWN CUSIP: 23954D109 Class: Common Stock

MASSACHUSETTS FINANCIAL SERVICES CO /MA/'s Holding History (CIK: 0000912938)

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

Q4 2025

Shares 150,925 Value ($000) $1,407 Avg Close $8.35 Range $6.70 - $10.90

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	150,925	$1,407	$8.35	$6.70 - $10.90