ANNX insider buying
1 cluster buyAnnexon, Inc. · Healthcare
When two or more insiders at Annexon, Inc. buy ANNX on the open market around the same time, that clustered conviction is one of the highest-signal patterns in SEC filing data. Below is every cluster we've detected in ANNX 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
- Nov 17 – Dec 1, 2025Detected Dec 1, 20252 insidersTotal bought$8.8MMarket cap$909.3M
All notable open-market buys in ANNX
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 |
|---|---|---|---|---|---|
| May 28, 2026 | Director | 613,497 | $5.41 | $3.3M | SEC ↗ |
| Mar 10, 2026 | Director | 8,000 | $5.67 | $45.4K | SEC ↗ |
| Dec 30, 2025 | Director | 4,115 | $5.02 | $20.7K | SEC ↗ |
| Dec 1, 2025 | Choi Jungcluster Director | 33,000 | $4.19 | $138.3K | SEC ↗ |
| Dec 1, 2025 | Director | 4,115 | $4.47 | $18.4K | SEC ↗ |
| Nov 21, 2025 | Satter Muneer Acluster Director | 422,613 | $4.28 | $1.8M | SEC ↗ |
| Nov 20, 2025 | Satter Muneer Acluster Director | 400,000 | $4.48 | $1.8M | SEC ↗ |
| Nov 19, 2025 | Satter Muneer Acluster Director | 500,000 | $3.94 | $2.0M | SEC ↗ |
| Nov 18, 2025 | Satter Muneer Acluster Director | 500,000 | $3.18 | $1.6M | SEC ↗ |
| Nov 17, 2025 | Satter Muneer Acluster Director | 500,000 | $2.99 | $1.5M | SEC ↗ |
| Oct 30, 2025 | Director | 4,115 | $3.17 | $13.0K | SEC ↗ |
| Sep 30, 2025 | Director | 4,115 | $3.05 | $12.6K | SEC ↗ |
| Sep 2, 2025 | Director | 4,115 | $2.09 | $8.6K | SEC ↗ |
| Jul 30, 2025 | Director | 4,115 | $2.43 | $10.0K | SEC ↗ |
| Jun 30, 2025 | Director | 4,115 | $2.46 | $10.1K | SEC ↗ |
| Dec 2, 2024 | Director | 3,200 | $5.33 | $17.1K | SEC ↗ |
| Oct 1, 2024 | Director | 3,200 | $5.97 | $19.1K | SEC ↗ |
| Sep 3, 2024 | Director | 3,200 | $5.48 | $17.5K | SEC ↗ |
| Aug 1, 2024 | Director | 3,200 | $6.24 | $20.0K | SEC ↗ |
| Jul 1, 2024 | Director | 3,200 | $5.00 | $16.0K | SEC ↗ |
| Jun 3, 2024 | Director | 3,200 | $4.83 | $15.5K | SEC ↗ |
| May 1, 2024 | Director | 3,200 | $4.68 | $15.0K | SEC ↗ |
| Apr 8, 2024 | Director | 3,200 | $6.07 | $19.4K | SEC ↗ |
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ANNX insider buying — FAQ
- Are insiders buying ANNX stock?
- Yes — 3 distinct insiders have bought ANNX (Annexon, Inc.) on the open market, including 1 cluster buy where two or more insiders bought within a rolling window. The most recent qualifying activity was May 29, 2026.
- How much ANNX stock have insiders bought?
- Insiders have bought a combined $12.4M of ANNX across 23 open-market purchases, based on SEC Form 4 filings.
- What is an insider cluster buy in ANNX?
- A cluster buy is two or more distinct Annexon, Inc. insiders — officers, directors, or 10% owners — each buying ANNX on the open market within a rolling window. ANNX has 1 detected cluster buy to date.
- Where does this ANNX 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 ANNX
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 ANNX within a rolling window. We track clusters at every company size, from micro-caps to mega-caps. Every figure on this page traces back to an official filing; open any row to jump straight to the source document. What counts as a cluster buy?
This page is informational and reflects public filing data. It is not investment advice or a recommendation regarding ANNX.