MBX MBX Biosciences, Inc.: institutional ownership and insider trading
184 funds reported holding $3.16B of MBX Biosciences, Inc. in their latest 13F filings; in Q2 2026 funds net bought $185M, with 36 new positions and 20 funds selling out; over the last 12 months insiders bought $526K and sold $2.73M on the open market.
Famous investors holding MBX
- Izzy Englander (Millennium Management): $12.5M, 0.0% of the portfolio
- D. E. Shaw (D. E. Shaw & Co.): $10.1M, 0.0% of the portfolio
- Two Sigma (Two Sigma Investments): $6.26M, 0.0% of the portfolio
- Ken Griffin (Citadel Advisors): $1.45M, 0.0% of the portfolio
Largest institutional holders of MBX
- Frazier Life Sciences Management, L.P. — $367M
- FMR LLC — $294M
- WELLINGTON MANAGEMENT GROUP LLP — $275M
- NEA Management Company, LLC — $200M
- ORBIMED ADVISORS LLC — $189M
- BlackRock, Inc. (BLK) — $183M
- Paradigm Biocapital Advisors LP — $138M
- NVP Associates, LLC — $118M
- Deep Track Capital, LP — $95.6M
- Polar Capital Holdings Plc — $88.8M
Recent MBX insider trades
- Aug 4, 2026: Azoulay Salomon sold 370 shares ($24.3K)
- May 8, 2026: Azoulay Salomon sold 70,003 shares ($2.69M)
- May 6, 2026: Hawryluk P. Kent sold 607 shares ($17.9K)
- May 6, 2026: Azoulay Salomon sold 231 shares ($6.82K)
5%+ owners
- Patrick J. Heron: 11.7% (Schedule 13D/A, filed Aug 10, 2026)
- FMR LLC: 11.2% (Schedule 13G/A, filed Jul 8, 2026)
- Wellington Management Group LLP: 10.5% (Schedule 13G/A, filed Jul 8, 2026)
- ORBIMED ADVISORS LLC: 6.4% (Schedule 13D/A, filed Aug 10, 2026)
- BlackRock, Inc.: 5.5% (Schedule 13G, filed Jul 29, 2026)
- Paradigm BioCapital Advisors LP: 5.2% (Schedule 13G, filed Jun 24, 2026)