WELLINGTON MANAGEMENT GROUP LLP - 31 Mar 2025 SCHEDULE 13G/A Report for MBX Biosciences, Inc. Common Stock (MBX)

Filing Manager
WELLINGTON MANAGEMENT GROUP LLP
Reporting Manager
Wellington Management Group LLP
Security
MBX Biosciences, Inc. Common Stock
Symbol
MBX
Shares outstanding
33,399,000 shares
Disclosed Ownership
2,638,521 shares
Ownership
7.9%
Form type
SCHEDULE 13G/A
Filing time
12 May 2025, 10:44:44 UTC
Date of event
31 Mar 2025
Next filing
12 Aug 2025
SEC
View on sec.gov

Reporting Managers (4)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
Wellington Management Group LLP 7.9% 2,638,521 0 2,525,931 Taisia Lowe Regulatory Analyst
Wellington Group Holdings LLP 7.9% 2,638,521 0 2,525,931 Taisia Lowe Regulatory Analyst
Wellington Investment Advisors Holdings LLP 7.9% 2,638,521 0 2,525,931 Taisia Lowe Regulatory Analyst
Wellington Management Company LLP 7.8% 2,638,521 0 2,525,931 Taisia Lowe Regulatory Analyst