Charles N. York II - COO and CFO at Day One Biopharmaceuticals, Inc.

Insider Transactions and Holdings

Entity Type: Individual
Role: COO and CFO
Issuer Symbol: DAWN on Nasdaq
All Insider Reports: All Insider Reports

Charles N. York II - trading volume in the past year for Day One Biopharmaceuticals, Inc.

	Shares	%	Avg Price	Total $
Buys
Sells	-18,515	100%	$8.70	-$161,153
Net	-18,515	-100%		-$161,153

Holdings reported by Charles N. York II for Day One Biopharmaceuticals, Inc.

Security	Num Shares	Value	Price $	Transaction Date	Ownership	Underlying Class	Underlying Amount
Common Stock	312,025	$3,619,770	$11.60	17 Feb 2026	Direct
Restricted Stock Units	126,000	$1,410,998	$13.31	30 Jan 2026	Direct	Common Stock
Restricted Stock Unit (RSU)	118,125	$1,188,823	$11.96	15 Feb 2026	Direct	Common Stock
Stock Option (right to buy Common Stock)	188,000			30 Jan 2026	Direct	Common Stock

Transactions reported by Charles N. York II for Day One Biopharmaceuticals, Inc.

Sym	Class	Transaction	%	Value $	* Price $	Shares	Shares After	Date	Ownership

* An asterisk sign (*) next to the price indicates that the price is likely invalid.