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.

QSI insider buying

2 cluster buys

Quantum-Si Inc · Healthcare

When two or more insiders at Quantum-Si Inc buy QSI in a qualifying detection window, the grouped purchases provide a starting point for further research. 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.

Clusters

Distinct insiders

Total bought

$771.5K

Market cap

$201.2M

Detected clusters

Mar 5 – Mar 5, 2026
Detected Mar 5, 2026
2 insiders
Total bought
$564.4K
Market cap
$201.2M
Aug 9 – Aug 9, 2024
Detected Aug 9, 2024
Executive buyer4 insiders
Total bought
$207.1K
Market 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

All insider buying in Healthcare →

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. 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 QSI.