Norwest Venture Partners XVI, LP - Sep 26, 2025 SCHEDULE 13D/A Report for MBX BIOSCIENCES, INC. Common Stock, $0.0001 par value per share (MBX)

Filing Manager
Norwest Venture Partners XVI, LP
Reporting Manager
Tiba Aynechi
Security
MBX BIOSCIENCES, INC. Common Stock, $0.0001 par value per share
Symbol
MBX
Shares outstanding
44.6M shares
Disclosed Ownership
2.14M shares
Ownership
4.8%
Form type
SCHEDULE 13D/A
Date filed
9/30/2025, 06:15 PM
Date of event
Sep 26, 2025
SEC
View on sec.gov

Reporting Managers (6)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
Norwest Venture Partners XVI, LP 4.8% 2.14M 0 2.14M /s/ Matthew De Dominicis By Genesis VC Partners XVI, LLC, its General Partner, By NVP Associates, LLC, its Managing Member, By Matthew De Dominicis, Chief Financial Officer 0001876200
Genesis VC Partners XVI, LLC 4.8% 2.14M 0 2.14M /s/ Matthew De Dominicis By NVP Associates, LLC, its Managing Member, By Matthew De Dominicis, Chief Financial Officer
NVP Associates, LLC 4.8% 2.14M 0 2.14M /s/ Matthew De Dominicis By Matthew De Dominicis, Chief Financial Officer 0001545692
Jeffrey Crowe 4.8% 2.14M 0 2.14M /s/ Matthew De Dominicis By Matthew De Dominicis, Attorney-in-fact 0001535261
Jon Erik Kossow 4.8% 2.14M 0 2.14M /s/ Matthew De Dominicis By Matthew De Dominicis, Attorney-in-fact 0001726084
Tiba Aynechi 4.8% 2.14M 4.65K 2.14M /s/ Matthew De Dominicis By Matthew De Dominicis, Attorney-in-fact 0001669220