MBX Biosciences, Inc.
MBX- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001776111
In the last 90 days, MBX Biosciences, Inc. insiders filed 0 open-market purchases and 1 sale; 172 institutions reported holding it in 13F filings for Q2 2026, worth $3.06B in total; no superinvestor holds it.
Open-market trades, last 90 days
Open-market purchases (P) and sales (S) by MBX Biosciences, Inc. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.
- Open-market buys
- 0 filings
- Open-market sells
- 1 filing
- 1 insider, $24.3K in total
- Insiders trading
- 1
- Net value
- −$24.3K
- Purchases minus sales
Insider roster
Directors, officers and 10% owners who have filed a Form 4 for MBX Biosciences, Inc., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.
| Name | Title | Last reported holding | Last filing | Filings, past year |
|---|---|---|---|---|
| Azoulay Salomon | Chief Medical Officer | 14,399 | Aug 5, 2026 | 4 |
| Smither John W | Chief Financial Officer | 28,000 | Aug 4, 2026 | 1 |
| Hoerter Steven L. | President and CEO | 82,938 | Aug 4, 2026 | 6 |
| Mathers Edward T | Director | 3,614,486Indirect | Jun 5, 2026 | 1 |
| Heron Patrick J | Director, 10% Owner | 5,219,440Indirect | Jun 5, 2026 | 2 |
| Pescovitz Ora H. | Director | 24,329 | Jun 5, 2026 | 1 |
| Stelzer Laurie | Director | – | Jun 5, 2026 | 2 |
| Aynechi Tiba | Director | 2,136,335Indirect | Jun 5, 2026 | 1 |
| Ryder Steven | Director | – | Jun 5, 2026 | 1 |
| Hawryluk P. Kent | President & CEO | 727,667 | May 8, 2026 | 6 |
| Bartram Richard | Chief Financial Officer | 15,000 | Feb 3, 2026 | 1 |
| Topper James N | 10% Owner | 5,219,440Indirect | Sep 30, 2025 | 1 |
| FHMLS X, L.L.C. | 10% Owner | 5,219,440Indirect | Sep 30, 2025 | 1 |
| Frazier Life Sciences X, L.P. | 10% Owner | 5,219,440Indirect | Sep 30, 2025 | 1 |
| FHMLS X, L.P. | 10% Owner | 5,219,440Indirect | Sep 30, 2025 | 1 |
| Cornelius James M | Director | 102,082 | Jun 6, 2025 | 0 |
| OrbiMed Advisors LLC | Director, 10% Owner | 747,887Indirect | Feb 19, 2025 | 0 |
| OrbiMed Capital GP VII LLC | Director, 10% Owner | 747,887Indirect | Feb 19, 2025 | 0 |
| OrbiMed Genesis GP LLC | Director, 10% Owner | 747,887Indirect | Feb 19, 2025 | 0 |
| Gordon Carl L | Director, 10% Owner | 747,887Indirect | Feb 19, 2025 | 0 |
| New Enterprise Associates 17, L.P. | 10% Owner | 3,614,486 | Sep 17, 2024 | 0 |
| NEA Partners 17, L.P. | 10% Owner | 3,614,486 | Sep 17, 2024 | 0 |
| Nea 17 GP, LLC | 10% Owner | 3,614,486 | Sep 17, 2024 | 0 |
| Sandell Scott D | 10% Owner | 3,614,486Indirect | Sep 17, 2024 | 0 |
| Baskett Forest | 10% Owner | 3,614,486Indirect | Sep 17, 2024 | 0 |
| Walker Paul Edward | 10% Owner | 3,614,486Indirect | Sep 17, 2024 | 0 |
| Florence Anthony A. Jr. | 10% Owner | 3,614,486Indirect | Sep 17, 2024 | 0 |
| Behbahani Ali | 10% Owner | 3,614,486Indirect | Sep 17, 2024 | 0 |
| Makhzoumi Mohamad | 10% Owner | 3,614,486Indirect | Sep 17, 2024 | 0 |
| Chang Carmen | 10% Owner | 3,614,486Indirect | Sep 17, 2024 | 0 |
| Yang Rick | 10% Owner | 3,614,486Indirect | Sep 17, 2024 | 0 |
| Wellington Biomedical Innovation Master Investors (Cayman) II L.P. | 10% Owner | 1,790,122 | Sep 17, 2024 | 0 |
Insider trades
Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Aug 5, 2026 (view filing)4:57 PM ET | Aug 4 | 1 day | Azoulay SalomonChief Medical Officer | SSale | −370 | $65.77 | −$24.3K | −2.5%14.4K after | |
| May 11, 2026 (view filing) | May 8 | 3 days | Azoulay SalomonChief Medical Officer | SSale | −70.0K | $38.36 | −$2.69M | −82.6%14.8K after | 2 lots10b5-1 |
| May 8, 2026 (view filing) | May 6 | 2 days | Azoulay SalomonChief Medical Officer | SSale | −231 | $29.54 | −$6.82K | −1.5%14.8K after | |
| May 8, 2026 (view filing) | May 6 | 2 days | Hawryluk P. KentPresident & CEO | SSale | −607 | $29.54 | −$17.9K | −0.1%727.7K after | |
| Mar 16, 2026 (view filing) | Mar 13 | 3 days | Hawryluk P. KentPresident & CEO | PPurchase | +18.5K | $28.41 | +$525.6K | +4.0%486.8K after | |
| Oct 21, 2025 (view filing) | Oct 20 | 1 day | Hawryluk P. KentPresident & CEO | PPurchase | +20.0K | $13.64 | +$272.8K | +4.5%468.3K after | |
| Oct 20, 2025 (view filing) | Oct 17 | 3 days | Hoerter Steven L.Director | PPurchase | +20.0K | $13.25 | +$265.0K | New position20.0K after | |
| Sep 30, 2025 (view filing)4:59 PM ET | Sep 26 | 4 days | Heron Patrick J and 4 othersDirector, 10% Owner | PPurchase | +666.7K | $18.00 | +$12.0M | +14.6%5.22M after | |
| Apr 10, 2025 (view filing) | Apr 8 | 2 days | Pescovitz Ora H.Director | PPurchase | +7.69K | $5.89 | +$45.3K | +46.2%24.3K after | |
| Feb 19, 2025 (view filing)5:52 PM ET | Feb 14-18 | 5 days | OrbiMed Advisors LLC and 2 othersDirector, 10% Owner | PPurchase | +190.7K | $10.60 | +$2.02M | +34.2%747.9K after | 4 lotsDuplicate filing |
| Feb 19, 2025 (view filing) | Feb 14-18 | 5 days | Gordon Carl LDirector, 10% Owner | PPurchase | +190.7K | $10.60 | +$2.02M | +34.2%747.9K after | 4 lots |
| Feb 5, 2025 (view filing) | Feb 4 | 1 day | Hawryluk P. KentPresident & CEO | PPurchase | +50.0K | $10.69 | +$534.5K | +12.6%448.3K after | |
| Sep 17, 2024 (view filing)8:13 PM ET | Sep 16 | 1 day | OrbiMed Advisors LLC and 2 othersDirector, 10% Owner | PPurchase | +750.0K | $16.00 | +$12.0M | New position653.8K after | 2 lotsDuplicate filing |
| Sep 17, 2024 (view filing)8:12 PM ET | Sep 16 | 1 day | New Enterprise Associates 17, L.P. and 2 others10% Owner | PPurchase | +500.0K | $16.00 | +$8.00M | +16.1%3.61M after | Duplicate filing |
| Sep 17, 2024 (view filing)8:11 PM ET | Sep 16 | 1 day | Topper James N and 3 others10% Owner | PPurchase | +625.0K | $16.00 | +$10.0M | +15.9%4.55M after | Duplicate filing |
| Sep 17, 2024 (view filing) | Sep 16 | 1 day | Mathers Edward TDirector, 10% Owner | PPurchase | +500.0K | $16.00 | +$8.00M | +16.1%3.61M after | Duplicate filing |
| Sep 17, 2024 (view filing) | Sep 16 | 1 day | Baskett Forest10% Owner | PPurchase | +500.0K | $16.00 | +$8.00M | +16.1%3.61M after | Duplicate filing |
| Sep 17, 2024 (view filing) | Sep 16 | 1 day | Behbahani Ali10% Owner | PPurchase | +500.0K | $16.00 | +$8.00M | +16.1%3.61M after | Duplicate filing |
| Sep 17, 2024 (view filing) | Sep 16 | 1 day | Chang Carmen10% Owner | PPurchase | +500.0K | $16.00 | +$8.00M | +16.1%3.61M after | Duplicate filing |
| Sep 17, 2024 (view filing) | Sep 16 | 1 day | Florence Anthony A. Jr.10% Owner | PPurchase | +500.0K | $16.00 | +$8.00M | +16.1%3.61M after | Duplicate filing |
| Sep 17, 2024 (view filing) | Sep 16 | 1 day | Makhzoumi Mohamad10% Owner | PPurchase | +500.0K | $16.00 | +$8.00M | +16.1%3.61M after | Duplicate filing |
| Sep 17, 2024 (view filing) | Sep 16 | 1 day | Walker Paul Edward10% Owner | PPurchase | +500.0K | $16.00 | +$8.00M | +16.1%3.61M after | Duplicate filing |
| Sep 17, 2024 (view filing) | Sep 16 | 1 day | Yang Rick10% Owner | PPurchase | +500.0K | $16.00 | +$8.00M | +16.1%3.61M after | Duplicate filing |
| Sep 17, 2024 (view filing) | Sep 16 | 1 day | Sandell Scott D10% Owner | PPurchase | +500.0K | $16.00 | +$8.00M | +16.1%3.61M after | |
| Sep 17, 2024 (view filing) | Sep 16 | 1 day | Heron Patrick JDirector, 10% Owner | PPurchase | +625.0K | $16.00 | +$10.0M | +15.9%4.55M after | |
| Sep 17, 2024 (view filing) | Sep 16 | 1 day | Aynechi TibaDirector | PPurchase | +750.0K | $16.00 | +$12.0M | +54.1%2.14M after | |
| Sep 17, 2024 (view filing) | Sep 16 | 1 day | Gordon Carl LDirector, 10% Owner | PPurchase | +750.0K | $16.00 | +$12.0M | New position653.8K after | 2 lots |