VANGUARD GROUP INC - 30 Sep 2025 SCHEDULE 13G Report for Metsera Inc Common Stock (MTSR)

Filing Manager: VANGUARD GROUP INC
Reporting Manager: The Vanguard Group
Security: Metsera Inc Common Stock
Symbol: MTSR
Shares outstanding: 105,334,412 shares
Disclosed Ownership: 5,824,993 shares
Ownership: 5.5%
Form type: SCHEDULE 13G
Filing time: 31 Oct 2025, 11:05:39 UTC
Date of event: 30 Sep 2025
SEC: View on sec.gov

Reporting Managers (1)

Name	Ownership	Shares Owned	sole voting power	shared voting power	Signature	Title	CIK
The Vanguard Group	5.5%	5,824,993	0	403,600	Ashley Grim	Head of Global Fund Administration