MBX Biosciences, Inc. - MBX

Ownership (Schedule 13D / 13G) · latest 50 filings · Back to all files
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Filed Form Reporting person Percent Shares SEC
Jul 08, 2026 SCHEDULE 13G/A Wellington Management Group LLP 10.5% 4,977,523 View
Jul 08, 2026 SCHEDULE 13G/A Wellington Group Holdings LLP 10.5% 4,977,523 View
Jul 08, 2026 SCHEDULE 13G/A Wellington Investment Advisors Holdings LLP 10.5% 4,977,523 View
Jul 08, 2026 SCHEDULE 13G/A Wellington Management Company LLP 9.8% 4,977,523 View
Jul 08, 2026 SCHEDULE 13G/A FMR LLC 11.2% 5,322,885 View
Jul 08, 2026 SCHEDULE 13G/A Abigail P. Johnson 11.2% 5,322,885 View
Jun 24, 2026 SCHEDULE 13G Paradigm BioCapital Advisors LP 5.2% 2,493,015 View
Jun 24, 2026 SCHEDULE 13G Paradigm BioCapital Advisors GP LLC 5.2% 2,493,015 View
Jun 24, 2026 SCHEDULE 13G Senai Asefaw, M.D. 5.2% 2,493,015 View
Jun 24, 2026 SCHEDULE 13G Paradigm BioCapital International Fund Ltd. 4.6% 2,187,207 View
May 06, 2026 SCHEDULE 13G FMR LLC 6.2% 2,936,684 View
May 06, 2026 SCHEDULE 13G Abigail P. Johnson 6.2% 2,936,684 View
Apr 27, 2026 SCHEDULE 13G/A BlackRock, Inc. 4.8% 2,287,497 View
Feb 11, 2026 SCHEDULE 13D/A — 1.0% — View
Feb 10, 2026 SCHEDULE 13G/A Wellington Management Group LLP 7.5% 3,349,961 View
Feb 10, 2026 SCHEDULE 13G/A Wellington Group Holdings LLP 7.5% 3,349,961 View
Feb 10, 2026 SCHEDULE 13G/A Wellington Investment Advisors Holdings LLP 7.5% 3,349,961 View
Feb 10, 2026 SCHEDULE 13G/A Wellington Management Company LLP 7.3% 3,349,961 View
Percent = "% of class represented by amount beneficially owned" for this reporting person in the filed 13D/13G. Shares = reported beneficial ownership amount for the same row (not portfolio shares from 13F). Amendments (/A) can repeat the same holder over time, so rows should not be summed. Extraction is best-effort from filing text and can be missing or noisy; verify exact figures via the SEC link in each row.