Filing Details

Accession Number:
0001072613-25-000107
Form Type:
13D Filing
Publication Date:
2025-02-09 19:00:00
Filed By:
ARCH Venture Fund XII, L.P.
Company:
Metsera Inc.
Filing Date:
2025-02-10
SEC Url:
13D Filing
Ownership Summary

Please notice the below summary table is generated without human intervention and may contain errors. Please refer to the complete filing displayed below for exact figures.

Name Sole Voting Power Shared Voting Power Sole Dispositive Power Shared Dispositive Power Aggregate Amount Owned Power Percent of Class
ARCH Venture Fund XII, L.P. 0 26,816,808 0 26,816,808 26,816,808 25.5%
ARCH Venture Partners XII, L.P. 0 26,816,808 0 26,816,808 26,816,808 25.5%
ARCH Venture Partners XII, LLC 0 26,816,808 0 26,816,808 26,816,808 25.5%
ARCH Venture Fund XIII, L.P. 0 26,816,808 0 26,816,808 26,816,808 25.5%
ARCH Venture Partners XIII, L.P. 0 26,816,808 0 26,816,808 26,816,808 25.5%
ARCH Venture Partners XIII, LLC 0 26,816,808 0 26,816,808 26,816,808 25.5%
Kristina Burow 12,412 26,816,808 12,412 26,816,808 26,829,220 25.5%
Keith Crandell 0 26,816,808 0 26,816,808 26,816,808 25.5%
Steven Gillis 0 26,816,808 0 26,816,808 26,816,808 25.5%
Robert Nelsen 0 26,816,808 0 26,816,808 26,816,808 25.5%
Paul Berns 976,178 8,313,680 976,178 8,313,680 9,289,858 8.8%
Filing





If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. Checkbox not checked

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).






SCHEDULE 13D





SCHEDULE 13D





SCHEDULE 13D





SCHEDULE 13D





SCHEDULE 13D





SCHEDULE 13D





SCHEDULE 13D





SCHEDULE 13D





SCHEDULE 13D





SCHEDULE 13D





SCHEDULE 13D





SCHEDULE 13D

 
ARCH Venture Fund XII, L.P.
 
Signature:ARCH Venture Partners XII, L.P.
Name/Title:its General Partner
Date:02/10/2025
 
Signature:ARCH Venture Partners XII, LLC
Name/Title:its General Partner
Date:02/10/2025
 
Signature:/s/ Mark McDonnell
Name/Title:** Mark McDonnell, as Attorney-in-Fact for Robert Nelsen, Managing Director
Date:02/10/2025
 
ARCH Venture Partners XII, L.P.
 
Signature:ARCH Venture Partners XII, LLC
Name/Title:its General Partner
Date:02/10/2025
 
Signature:/s/ Mark McDonnell
Name/Title:** Mark McDonnell, as Attorney-in-Fact for Robert Nelsen, Managing Director
Date:02/10/2025
 
ARCH Venture Partners XII, LLC
 
Signature:/s/ Mark McDonnell
Name/Title:** Mark McDonnell, as Attorney-in-Fact for Robert Nelsen, Managing Director
Date:02/10/2025
 
ARCH Venture Fund XIII, L.P.
 
Signature:ARCH Venture Partners XIII, L.P.
Name/Title:its General Partner
Date:02/10/2025
 
Signature:ARCH Venture Partners XIII, LLC
Name/Title:its General Partner
Date:02/10/2025
 
Signature:/s/ Mark McDonnell
Name/Title:** Mark McDonnell, as Attorney-in-Fact for Keith Crandell, Managing Director
Date:02/10/2025
 
ARCH Venture Partners XIII, L.P.
 
Signature:ARCH Venture Partners XIII, LLC
Name/Title:its General Partner
Date:02/10/2025
 
Signature:/s/ Mark McDonnell
Name/Title:** Mark McDonnell, as Attorney-in-Fact for Keith Crandell, Managing Director
Date:02/10/2025
 
ARCH Venture Partners XIII, LLC
 
Signature:/s/ Mark McDonnell
Name/Title:** Mark McDonnell, as Attorney-in-Fact for Keith Crandell, Managing Director
Date:02/10/2025
 
Kristina Burow
 
Signature:/s/ Mark McDonnell
Name/Title:** Mark McDonnell, as Attorney-in-Fact for Kristina Burow
Date:02/10/2025
 
Keith Crandell
 
Signature:/s/ Mark McDonnell
Name/Title:** Mark McDonnell, as Attorney-in-Fact for Keith Crandell
Date:02/10/2025
 
Steven Gillis
 
Signature:/s/ Mark McDonnell
Name/Title:** Mark McDonnell, as Attorney-in-Fact for Steven Gillis
Date:02/10/2025
 
Robert Nelsen
 
Signature:/s/ Mark McDonnell
Name/Title:** Mark McDonnell, as Attorney-in-Fact for Robert Nelsen
Date:02/10/2025
 
Paul Berns
 
Signature:/s/ Mark McDonnell
Name/Title:** Mark McDonnell, as Attorney-in-Fact for Paul Berns
Date:02/10/2025
Comments accompanying signature:
** This Schedule 13D was executed by Mark McDonnell pursuant to a Power of Attorney filed as Exhibit 24.4 to the Form 3 relating to the beneficial ownership of shares of Metsera, Inc. by the Reporting Persons filed with the Securities Exchange Commission on January 31, 2025 and incorporated herein in its entirety by reference.