MBX Biosciences, Inc. (MBX) Institutional Ownership and Insiders Activity

MBX Biosciences, Inc. (MBX) is widely held by institutional investors, with 165 firms reporting positions valued at approximately $3.04B based on SEC Form 13F filings for the quarter ended June 30, 2026.

Frazier Life Sciences Management, L.P. is the largest disclosed holder, reporting approximately $367.19M in MBX holdings in its latest filing.