ARCH Venture Fund XII, L.P. - 03 Feb 2025 SCHEDULE 13D Report for Metsera, Inc. Common Stock, $0.00001 par value (MTSR)

Filing Manager
ARCH Venture Fund XII, L.P.
Reporting Manager
Kristina Burow
Security
Metsera, Inc. Common Stock, $0.00001 par value
Symbol
MTSR
Shares outstanding
105,212,627 shares
Disclosed Ownership
26,829,220 shares
Ownership
26%
Form type
SCHEDULE 13D
Filing time
10 Feb 2025, 21:30:19 UTC
Date of event
03 Feb 2025
Next filing
14 Nov 2025
SEC
View on sec.gov

Quoteable Key Fact

"ARCH Venture Fund XII, L.P. disclosed 26% ownership in Metsera, Inc. Common Stock, $0.00001 par value (MTSR) on 03 Feb 2025."

Quick Takeaways

  • ARCH Venture Fund XII, L.P. filed SCHEDULE 13D for Metsera, Inc. Common Stock, $0.00001 par value (MTSR).
  • Disclosed ownership: 26%.
  • Date of event: 03 Feb 2025.

What Changed

  • No earlier schedule filing is available for direct comparison.
  • Current filing was accepted on 10 Feb 2025, 21:30.

Why This Matters

  • This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
  • You can verify ownership claims directly against the original SEC filing.

Source Evidence

Backed by Schedule 13D/13G

Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.

See Original Filing

Reporting Managers (11)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
ARCH Venture Fund XII, L.P. 26% 26,816,808 0 26,816,808 ARCH Venture Partners XII, L.P. its General Partner 0001906837
ARCH Venture Partners XII, L.P. 26% 26,816,808 0 26,816,808 ARCH Venture Partners XII, LLC its General Partner 0001979765
ARCH Venture Partners XII, LLC 26% 26,816,808 0 26,816,808 /s/ Mark McDonnell ** Mark McDonnell, as Attorney-in-Fact for Robert Nelsen, Managing Director 0001979548
ARCH Venture Fund XIII, L.P. 26% 26,816,808 0 26,816,808 ARCH Venture Partners XIII, L.P. its General Partner 0002006772
ARCH Venture Partners XIII, L.P. 26% 26,816,808 0 26,816,808 ARCH Venture Partners XIII, LLC its General Partner 0002016083
ARCH Venture Partners XIII, LLC 26% 26,816,808 0 26,816,808 /s/ Mark McDonnell ** Mark McDonnell, as Attorney-in-Fact for Keith Crandell, Managing Director 0002016082
Kristina Burow 26% 26,829,220 12,412 26,816,808 /s/ Mark McDonnell ** Mark McDonnell, as Attorney-in-Fact for Kristina Burow 0001569248
Keith Crandell 26% 26,816,808 0 26,816,808 /s/ Mark McDonnell ** Mark McDonnell, as Attorney-in-Fact for Keith Crandell 0001219039
Steven Gillis 26% 26,816,808 0 26,816,808 /s/ Mark McDonnell ** Mark McDonnell, as Attorney-in-Fact for Steven Gillis 0001229592
Robert Nelsen 26% 26,816,808 0 26,816,808 /s/ Mark McDonnell ** Mark McDonnell, as Attorney-in-Fact for Robert Nelsen 0001219042
Paul Berns 8.8% 9,289,858 976,178 8,313,680 /s/ Mark McDonnell ** Mark McDonnell, as Attorney-in-Fact for Paul Berns 0001202769