Metsera, Inc. — Director's Dealing 2025

Apr 30, 2025

SEC Form 3 — Initial Statement of Beneficial Ownership

Issuer: Metsera, Inc. (MTSR)
CIK: 0002040807
Period of Report: 2025-04-28

Reporting Person: Lang Matthew (N/A)

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Stock Option (Right to Buy)	$17.16	2035-04-14	Common Stock (325000)		Direct

Footnotes

F1: The option was granted on April 15, 2025. The options vest and become exercisable as to 25% of the shares initially subject to the option on the first anniversary of April 14, 2025 and as to 1/48th of the shares initially subject to the option on each monthly anniversary thereafter such that the award is vested in full as of the fourth anniversary of the grant date, in each case, subject to the Reporting Person's continued service through each vesting date.