Orbimed Advisors Llc - Sep 26, 2025 SCHEDULE 13D/A Report for MBX Biosciences, Inc. COMMON STOCK (MBX)

Filing Manager
Orbimed Advisors Llc
Reporting Manager
ORBIMED ADVISORS LLC
Security
MBX Biosciences, Inc. COMMON STOCK
Symbol
MBX
Shares outstanding
44.5M shares
Disclosed Ownership
4M shares
Ownership
9%
Form type
SCHEDULE 13D/A
Date filed
9/30/2025, 07:06 PM
Date of event
Sep 26, 2025
SEC
View on sec.gov

Reporting Managers (3)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
ORBIMED ADVISORS LLC 9% 4M 0 4M /s/ Carl L. Gordon Carl L. Gordon/Member 0001055951
ORBIMED CAPITAL GP VII LLC 7.3% 3.26M 0 3.26M /s/ Carl L. Gordon Carl L. Gordon/Member of OrbiMed Advisors LLC 0001760648
OrbiMed Genesis GP LLC 1.7% 748K 0 748K /s/ Carl L. Gordon Carl L. Gordon/Member of OrbiMed Advisors LLC 0001808744