Jon P. Stonehouse - 28 Apr 2025 Form 4 Insider Report for Metsera, Inc. (MTSR)

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	MTSR	Stock Option (Right to Buy)	Award	$945,531	+47,730		$19.81	47,730	28 Apr 2025	Common Stock	47,730	$19.81	Direct	F1

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

Id	Content
F1	The options will vest and become exercisable in 36 substantially equal monthly installments after the date of grant, such that the option will be vested in full on the third anniversary of the date of grant, subject to the Reporting Person's continued service through each such vesting date.