Metsera, Inc. — Director's Dealing 2025

Jan 30, 2025

SEC Form 3 — Initial Statement of Beneficial Ownership

Issuer: Metsera, Inc. (MTSR)
CIK: 0002040807
Period of Report: 2025-01-30

Reporting Person: Wellington Biomedical Innovation Master Investors (Cayman) II L.P. (N/A)

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Series B Preferred Stock	$		Common Stock (1857699)		Direct

Footnotes

F1: Each share of Series B Preferred Stock is convertible into Common Stock on a 2.349723-for-1 basis at the option of the holder, and will convert automatically upon closing of the Issuer's initial public offering into the number of shares shown in column 3 without payment of consideration. The Series B Preferred Stock has no expiration date.