191 institutions reported holding $3.11B of MBX BIOSCIENCES INC (MBX) in SEC 13F filings for 2026-06-30. Largest institutional holders: Frazier Life Sciences Management, L.P. ($367.2M), FMR LLC ($293.8M), WELLINGTON MANAGEMENT GROUP LLP ($274.8M), NEA Management Company, LLC ($199.5M), ORBIMED ADVISORS LLC ($189.3M). Source: SEC Form 13F.
Source: SEC Form 13F filings · as of 2026-06-30