11 insiders reported 24 Form 4 transactions for MBX Biosciences, Inc. (MBX) over the past 18 months (most recent 2026-08-05). Recent activity: Azoulay Salomon (Chief Medical Officer) Sell 370 shares, Hoerter Steven L. (President and CEO) Buy 71,000 shares, Smither John W (Chief Financial Officer) Buy 28,000 shares, Azoulay Salomon (Chief Medical Officer) Buy 55,000 shares, Azoulay Salomon (Chief Medical Officer) Sell 55,000 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-05 | Azoulay Salomon | Chief Medical Officer | Sell | 370 | $24,335 |
| 2026-08-04 | Hoerter Steven L. | President and CEO | Buy | 71,000 | $0 |
| 2026-08-04 | Smither John W | Chief Financial Officer | Buy | 28,000 | $0 |
| 2026-05-11 | Azoulay Salomon | Chief Medical Officer | Buy | 55,000 | $575,300 |
| 2026-05-11 | Azoulay Salomon | Chief Medical Officer | Sell | 55,000 | $2.1M |
| 2026-05-11 | Azoulay Salomon | Chief Medical Officer | Buy | 15,003 | $240,048 |
| 2026-05-11 | Azoulay Salomon | Chief Medical Officer | Sell | 15,003 | $574,615 |
| 2026-05-08 | Hawryluk P. Kent | President & CEO | Sell | 607 | $17,931 |
| 2026-05-08 | Azoulay Salomon | Chief Medical Officer | Sell | 231 | $6,824 |
| 2026-05-04 | Hoerter Steven L. | Director | Buy | 11,938 | $0 |
| 2026-03-16 | Hawryluk P. Kent | President & CEO | Buy | 18,500 | $525,585 |
| 2026-02-27 | Hawryluk P. Kent | President & CEO | Buy | 28,768 | $460,288 |
| 2026-02-03 | Bartram Richard | Chief Financial Officer | Buy | 15,000 | $0 |
| 2026-02-03 | Hawryluk P. Kent | President & CEO | Buy | 35,250 | $0 |
| 2026-02-03 | Azoulay Salomon | Chief Medical Officer | Buy | 15,000 | $0 |
| 2025-10-28 | Hawryluk P. Kent | President & CEO | Buy | 182,859 | $594,292 |
| 2025-10-21 | Hawryluk P. Kent | President & CEO | Buy | 20,000 | $272,800 |
| 2025-10-20 | Hoerter Steven L. | Director | Buy | 20,000 | $265,000 |
| 2025-09-30 | Topper James N | Insider | Buy | 666,666 | $12.0M |
| 2025-09-30 | Heron Patrick J | Director | Buy | 666,666 | $12.0M |
| 2025-09-30 | FHMLS X, L.L.C. | Insider | Buy | 666,666 | $12.0M |
| 2025-09-30 | Frazier Life Sciences X, L.P. | Insider | Buy | 666,666 | $12.0M |
| 2025-09-30 | FHMLS X, L.P. | Insider | Buy | 666,666 | $12.0M |
| 2025-04-10 | Pescovitz Ora H. | Director | Buy | 7,693 | $45,312 |
Source: SEC Form 4 filings · as of 2026-08-05