Metsera, Inc. — Director's Dealing 2025

Feb 5, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Metsera, Inc. (MTSR)
CIK: 0002040807
Period of Report: 2025-02-03

Reporting Person: FMR LLC (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-02-03	Common Stock	C	1418606	—	Acquired	1418606	Indirect
2025-02-03	Common Stock	C	3120934	—	Acquired	4539540	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-02-03	Series Seed Preferred Stock	$	C	1418606	Disposed		Common Stock (1418606)	Indirect
2025-02-03	Series A Preferred Stock	$	C	3120934	Disposed		Common Stock (3120934)	Indirect

Footnotes

F1: On February 3, 2025, in connection with the completion of the issuer's initial public offering, each share of Series Seed Preferred Stock and Series A Preferred Stock converted on a 1-for-1 basis into shares of Common Stock.