Schedule 13D ownership disclosure

MBX Biosciences Inc

COMMON STOCK · CUSIP: 55287L101

Event date: 2025-09-26

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares
Unavailable
Percent of class
Unavailable
  • ORBIMED ADVISORS LLCReported CIK 0001055951

    Shares: 4,002,887.00 · Class: 9.0%

  • ORBIMED CAPITAL GP VII LLCReported CIK 0001760648

    Shares: 3,255,000.00 · Class: 7.3%

  • OrbiMed Genesis GP LLCReported CIK 0001808744

    Shares: 747,887.00 · Class: 1.7%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.

Source: SEC EDGAR filing

Filing metadata

Accession number
0000947871-25-000872
Form type
SCHEDULE 13D/A
Filer
MBX Biosciences, Inc.
CIK
CIK 1776111
Filed
Sep 30, 2025
Reporting period
Sep 26, 2025
Description
Schedule 13D beneficial ownership

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