MBX insider buying
3 cluster buysMBX Biosciences, Inc. · Healthcare
When two or more insiders at MBX Biosciences, Inc. buy MBX in a qualifying detection window, the grouped purchases provide a starting point for further research. Below is every cluster we've detected in MBX plus the full record of qualifying open-market buys, each parsed directly from Form 4 filings and linked back to the source on SEC EDGAR.
Detected clusters
- Sep 26 – Oct 20, 2025Detected Oct 20, 2025Executive buyer3 insidersTotal bought$12.5MMarket cap$2.8B
- Feb 4 – Feb 18, 2025Detected Feb 18, 2025Executive buyer3 insidersTotal bought$4.6MMarket cap$2.8B
- Sep 16 – Sep 16, 2024Detected Sep 16, 202415 insidersTotal bought$136.0MMarket cap$2.8B
All notable open-market buys in MBX
Every open-market Form 4 purchase, newest first. Click an insider to see their full buying record across companies.
| Date | Insider | Shares | Price | Value | Filing |
|---|---|---|---|---|---|
| Mar 13, 2026 | Director, President & CEO | 18,500 | $28.41 | $525.6K | SEC ↗ |
| Oct 20, 2025 | Hawryluk P. Kentcluster Director, President & CEO | 20,000 | $13.64 | $272.8K | SEC ↗ |
| Oct 17, 2025 | Hoerter Steven L.cluster Director | 20,000 | $13.25 | $265.0K | SEC ↗ |
| Sep 26, 2025 | FHMLS X, L.P.cluster 10% Owner | 666,666 | $18.00 | $12.0M | SEC ↗ |
| Apr 8, 2025 | Director | 7,693 | $5.89 | $45.3K | SEC ↗ |
| Feb 18, 2025 | OrbiMed Genesis GP LLCcluster Director, 10% Owner | 94,100 | $10.84 | $1.0M | SEC ↗ |
| Feb 18, 2025 | GORDON CARL Lcluster Director, 10% Owner | 94,100 | $10.84 | $1.0M | SEC ↗ |
| Feb 18, 2025 | GORDON CARL Lcluster Director, 10% Owner | 49,070 | $10.84 | $531.9K | SEC ↗ |
| Feb 18, 2025 | OrbiMed Genesis GP LLCcluster Director, 10% Owner | 49,070 | $10.84 | $531.9K | SEC ↗ |
| Feb 14, 2025 | GORDON CARL Lcluster Director, 10% Owner | 29,540 | $9.85 | $291.0K | SEC ↗ |
| Feb 14, 2025 | OrbiMed Genesis GP LLCcluster Director, 10% Owner | 29,540 | $9.85 | $291.0K | SEC ↗ |
| Feb 14, 2025 | OrbiMed Genesis GP LLCcluster Director, 10% Owner | 17,962 | $9.90 | $177.8K | SEC ↗ |
| Feb 14, 2025 | GORDON CARL Lcluster Director, 10% Owner | 17,962 | $9.90 | $177.8K | SEC ↗ |
| Feb 4, 2025 | Hawryluk P. Kentcluster Director, President & CEO | 50,000 | $10.69 | $534.5K | SEC ↗ |
| Sep 16, 2024 | Aynechi Tibacluster Director | 750,000 | $16.00 | $12.0M | SEC ↗ |
| Sep 16, 2024 | Heron Patrick Jcluster Director, 10% Owner | 625,000 | $16.00 | $10.0M | SEC ↗ |
| Sep 16, 2024 | FHMLS X, L.P.cluster 10% Owner | 625,000 | $16.00 | $10.0M | SEC ↗ |
| Sep 16, 2024 | BASKETT FORESTcluster 10% Owner | 500,000 | $16.00 | $8.0M | SEC ↗ |
| Sep 16, 2024 | SANDELL SCOTT Dcluster 10% Owner | 500,000 | $16.00 | $8.0M | SEC ↗ |
| Sep 16, 2024 | Walker Paul Edwardcluster 10% Owner | 500,000 | $16.00 | $8.0M | SEC ↗ |
| Sep 16, 2024 | Yang Rickcluster 10% Owner | 500,000 | $16.00 | $8.0M | SEC ↗ |
| Sep 16, 2024 | ORBIMED ADVISORS LLCcluster Director, 10% Owner | 500,000 | $16.00 | $8.0M | SEC ↗ |
| Sep 16, 2024 | Florence Anthony A. Jr.cluster 10% Owner | 500,000 | $16.00 | $8.0M | SEC ↗ |
| Sep 16, 2024 | NEA Partners 17, L.P.cluster 10% Owner | 500,000 | $16.00 | $8.0M | SEC ↗ |
| Sep 16, 2024 | Behbahani Alicluster 10% Owner | 500,000 | $16.00 | $8.0M | SEC ↗ |
More Healthcare stocks with insider cluster buys
MBX insider buying — FAQ
- Are insiders buying MBX stock?
- Yes — 19 distinct insiders have bought MBX (MBX Biosciences, Inc.) on the open market, including 3 cluster buys where two or more insiders bought within a rolling window. The most recent qualifying activity was Mar 16, 2026.
- How much MBX stock have insiders bought?
- Insiders have bought a combined $153.7M of MBX across 31 open-market purchases, based on SEC Form 4 filings.
- What is an insider cluster buy in MBX?
- A cluster buy is two or more distinct MBX Biosciences, Inc. insiders — officers, directors, or 10% owners — each buying MBX on the open market within a rolling window. MBX has 3 detected cluster buys to date.
- Where does this MBX insider trading data come from?
- Every figure is parsed directly from SEC Form 4 filings on EDGAR, and each purchase on this page links back to its original filing document.
How we track insider buying in MBX
We continuously poll SEC EDGAR for new Form 4 filings and parse every open-market purchase (transaction code P). A cluster is recorded when two or more distinct insiders — officers, directors, or 10% owners — each buy MBX within a rolling window. We track clusters at every company size, from micro-caps to mega-caps. Transactions link to official filings; prices and market capitalizations may be cached market data. Read our methodology and data limits before interpreting the figures. What counts as a cluster buy?
This page is informational and reflects public filing data. It is not investment advice or a recommendation regarding MBX.