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MBX Biosciences, Inc. (NASDAQ:MBX)
US · Delayed Price · Currency is USD
Healthcare · Biotechnology
50.10+1.60 (+3.29%)
Insider Score
––Not scored
MBX Insider Score
Insiders filed in the last 90 days, but none of those trades qualified for scoring — round-trip buys and filings whose price is far off the market are excluded.
MBX Stock Insider Trading Activity
MBX stock’s insider trading shows 5 sales on the open market for an estimated $2.73M by company insiders over the last 6 months.
Not enough price history.
Insider Trading Activity (Form 4 Filings)
An insider trade occurs when an individual that has non-public information about a company buys or sells shares of that company’s stock. Examples of insiders include a company’s executive officers (CEO, CFO, COO), its board of directors, and its major shareholders. Insiders are required to submit their trading activity to the SEC through Form 4 filings.
Scored window · last 90 days0 qualifying buys0 insiders$0 bought— these are the numbers in the rankings table; the full history below shows every filing (buys, sells and older activity).
| Insider | Action | Shares | Avg Cost | Total | Δ Holdings | Held After | Date | Grade | Form 4 |
|---|---|---|---|---|---|---|---|---|---|
| Azoulay Salomon Other | Sell | 370 | $65.77 | $24.33K | 2.5% | 14,399 | Aug 4, 2026 | — | Form 4 |
| Smither John W CFO | Award | 28,000 | — | — | New | 28,000 | Aug 3, 2026 | — | Form 4 |
| Hoerter Steven L. CEO | Award | 71,000 | — | — | 595% | 82,938 | Aug 3, 2026 | — | Form 4 |
| Azoulay Salomon Other | Sell | 55,000 | $38.38 | $2.11M | 78.8% | 14,769 | May 8, 2026 | — | Form 4 |
| Azoulay Salomon Other | Option exercise | 15,003 | $16.00 | $240.05K | 102% | 29,772 | May 8, 2026 | — | Form 4 |
| Azoulay Salomon Other | Sell | 15,003 | $38.30 | $574.61K | 50.4% | 14,769 | May 8, 2026 | — | Form 4 |
| Azoulay Salomon Other | Option exercise | 55,000 | $10.46 | $575.30K | 372% | 69,769 | May 8, 2026 | — | Form 4 |
| Azoulay Salomon Other | Sell | 231 | $29.54 | $6.82K | 1.5% | 14,769 | May 6, 2026 | — | Form 4 |
| Hawryluk P. Kent CEO | Sell | 607 | $29.54 | $17.93K | 0.1% | 727,667 | May 6, 2026 | — | Form 4 |
| Hoerter Steven L. Director | Award | 11,938 | — | — | New | 11,938 | May 1, 2026 | — | Form 4 |
| Hawryluk P. Kent CEO | Buy | 18,500 | $28.41 | $525.59K | 4.0% | 486,777 | Mar 13, 2026 | CCEO BuyDilution | Form 4 |
| Hawryluk P. Kent CEO | Option exercise | 28,768 | $16.00 | $460.29K | 4.1% | 728,274 | Feb 26, 2026 | — | Form 4 |
| Azoulay Salomon Other | Award | 15,000 | — | — | New | 15,000 | Feb 2, 2026 | — | Form 4 |
| Bartram Richard CFO | Award | 15,000 | — | — | New | 15,000 | Feb 2, 2026 | — | Form 4 |
| Hawryluk P. Kent CEO | Award | 35,250 | — | — | 5.3% | 699,506 | Feb 2, 2026 | — | Form 4 |
| Hawryluk P. Kent CEO | Option exercise | 182,859 | $3.25 | $594.29K | 38.0% | 664,256 | Oct 24, 2025 | — | Form 4 |
| Hawryluk P. Kent CEO | Buy | 20,000 | $13.64 | $272.80K | 4.5% | 468,277 | Oct 20, 2025 | BFirst BuyCEO BuyDilution | Form 4 |
| Hoerter Steven L. Director | Buy | 20,000 | $13.25 | $265.00K | New | 20,000 | Oct 17, 2025 | BFirst BuyDilution | Form 4 |
| FHMLS X, L.P. Other | Buy | 666,666 | $18.00 | $12.00M | 14.6% | 5,219,440 | Sep 26, 2025 | — | Form 4 |
What these mean— the action is the SEC’s own Form 4 transaction code. Only a buy or a sell is an open-market trade; the rest are transfers, awards and exercises, which is why they carry no price.
- Buy (P) — Open-market or private purchase
- Sell (S) — Open-market or private sale
- Award (A) — Grant or award from the company, not a purchase
- Option exercise (M) — Exercise or conversion of an exempt derivative
Disclaimer — Informational only — not investment advice. Insider transaction data is sourced from SEC Form 4 filings; market data from public feeds and may be delayed. The Insider Score is a proprietary score for research purposes and does not predict future performance. Always do your own research.