MBX insider trading — MBX Biosciences, Inc.
Over the last 90 days, insiders at MBX Biosciences, Inc. (MBX) made 0 open-market purchases worth $0 and 1 open-market sale worth $24K, making them net sellers by $24K. The largest sale was by Azoulay Salomon (Chief Medical Officer), who sold 370 shares for $24K on Aug 4, 2026.
Updated Oct 16, 2026.
Recent MBX insider transactions
Every Form 4 filed by MBX Biosciences, Inc. officers, directors and 10% owners in the last 90 days, newest first. P = open-market purchase, S = open-market sale; other codes are awards, option exercises, tax withholding or gifts.
| Trade date | Insider | Role | Type | Ownership | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|---|
| Aug 4, 2026 | Azoulay Salomon | Chief Medical Officer | S · Sale | Direct | 370 | $65.77 | $24K | Form 4 |
| Aug 3, 2026 | Smither John W | Chief Financial Officer | A · Grant/award | Direct | 28,000 | — | — | Form 4 |
| Aug 3, 2026 | Hoerter Steven L. | President and CEO | A · Grant/award | Direct | 71,000 | — | — | Form 4 |
MBX insider trading FAQ
Are insiders buying MBX stock?
Not on the open market. In the last 90 days, MBX Biosciences, Inc. insiders made no open-market purchases, and 1 open-market sale totaling $24K. Purchases with the insider's own money are generally seen as a stronger signal than sales, which happen for many reasons (taxes, diversification, planned 10b5-1 sales).
Who are the insiders trading MBX?
Recent sellers: Azoulay Salomon.
Where does MBX insider trading data come from?
Every transaction comes from SEC Form 4 filings on EDGAR. Company officers, directors and 10% owners must file a Form 4 within two business days of buying or selling. InsiderBolt reads these filings directly from the SEC.
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Insider trading data is for informational purposes only and is not investment advice. Filings can be amended; always confirm details on SEC EDGAR.