QSI insider buying
2 cluster buysQuantum-Si Inc · Healthcare
When two or more insiders at Quantum-Si Inc buy QSI 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 QSI 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
- Mar 5 – Mar 5, 2026Detected Mar 5, 20262 insidersTotal bought$564.4KMarket cap$201.2M
- Aug 9 – Aug 9, 2024Detected Aug 9, 2024High conviction4 insidersTotal bought$207.1KMarket cap$207.2M
All notable open-market buys in QSI
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 5, 2026 | Kummeth Charles R.cluster Director | 500,000 | $0.92 | $460.0K | SEC ↗ |
| Mar 5, 2026 | Dowdy Paulacluster Director | 109,890 | $0.95 | $104.4K | SEC ↗ |
| Aug 9, 2024 | Kummeth Charles R.cluster Director | 138,900 | $0.87 | $120.8K | SEC ↗ |
| Aug 9, 2024 | Keyes Jeffry R.cluster Chief Financial Officer | 50,000 | $0.87 | $43.5K | SEC ↗ |
| Aug 9, 2024 | LaPointe Christiancluster General Counsel & Corp. Secr. | 25,000 | $0.86 | $21.5K | SEC ↗ |
| Aug 9, 2024 | Hawkins Jeffrey Alancluster Director, President & CEO | 25,000 | $0.85 | $21.3K | SEC ↗ |
More Healthcare stocks with insider cluster buys
QSI insider buying — FAQ
- Are insiders buying QSI stock?
- Yes — 5 distinct insiders have bought QSI (Quantum-Si 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 Mar 9, 2026.
- How much QSI stock have insiders bought?
- Insiders have bought a combined $771.5K of QSI across 6 open-market purchases, based on SEC Form 4 filings.
- What is an insider cluster buy in QSI?
- A cluster buy is two or more distinct Quantum-Si Inc insiders — officers, directors, or 10% owners — each buying QSI on the open market within a rolling window. QSI has 2 detected cluster buys to date.
- Where does this QSI 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 QSI
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 QSI 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 QSI.