ALT insider buying
2 cluster buysAltimmune, Inc.
When two or more insiders at Altimmune, Inc. buy ALT in a qualifying detection window, the grouped purchases provide a starting point for further research. Below is every cluster we've detected in ALT 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
- Dec 22, 2025 – Apr 1, 2026Detected Apr 1, 2026Executive buyer6 insidersTotal bought$294.5KMarket cap$599.0M
- Mar 13 – Mar 17, 2025Detected Mar 17, 2025Executive buyer2 insidersTotal bought$57.8KMarket cap$599.0M
All notable open-market buys in ALT
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 |
|---|---|---|---|---|---|
| Aug 13, 2026 | Director, President and CEO | 15,000 | $2.95 | $44.3K | SEC ↗ |
| Apr 1, 2026 | Durso Jerome Benedictcluster Director, President and CEO | 15,000 | $3.14 | $47.1K | SEC ↗ |
| Apr 1, 2026 | WEAVER GREGORY Lcluster Chief Financial Officer | 10,000 | $3.15 | $31.5K | SEC ↗ |
| Mar 6, 2026 | Durso Jerome Benedictcluster Director, President and CEO | 20,000 | $3.54 | $70.8K | SEC ↗ |
| Mar 6, 2026 | WEAVER GREGORY Lcluster Chief Financial Officer | 5,000 | $3.54 | $17.7K | SEC ↗ |
| Jan 8, 2026 | Pisano Waynecluster Director | 5,000 | $4.08 | $20.4K | SEC ↗ |
| Jan 5, 2026 | Sohn Catherine A.cluster Director | 500 | $4.24 | $2.1K | SEC ↗ |
| Dec 29, 2025 | Jorkasky Dianecluster Director | 527 | $3.80 | $2.0K | SEC ↗ |
| Dec 23, 2025 | GILL JOHNcluster Director | 12,500 | $4.10 | $51.2K | SEC ↗ |
| Dec 22, 2025 | Durso Jerome Benedictcluster Director | 12,500 | $4.13 | $51.6K | SEC ↗ |
| Mar 17, 2025 | Sohn Catherine A.cluster Director | 1,000 | $5.78 | $5.8K | SEC ↗ |
| Mar 13, 2025 | WEAVER GREGORY Lcluster Chief Financial Officer | 10,000 | $5.20 | $52.0K | SEC ↗ |
ALT insider buying — FAQ
- Are insiders buying ALT stock?
- Yes — 7 distinct insiders have bought ALT (Altimmune, Inc.) on the open market, including 2 cluster buys where two or more insiders bought within a rolling window. The most recent qualifying activity was Aug 13, 2026.
- How much ALT stock have insiders bought?
- Insiders have bought a combined $396.5K of ALT across 12 open-market purchases, based on SEC Form 4 filings.
- What is an insider cluster buy in ALT?
- A cluster buy is two or more distinct Altimmune, Inc. insiders — officers, directors, or 10% owners — each buying ALT on the open market within a rolling window. ALT has 2 detected cluster buys to date.
- Where does this ALT 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 ALT
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 ALT 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 ALT.