QSI
−$37.2K
37,381 sh @ $1
QSI
Quantum-Si Inc
SEC CIK 1816431
$0.9470
−8.1% · 90 days
90-day buys
$0
0 open-market
90-day sells
$297.9K
12 open-market
Net insider flow
−$297.9K
Net selling
Filings shown
21
Most recent
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At a glance
Over the last 90 days, insiders at QSI have sold a net $297.9K of stock (0 open-market buys vs 12 sells).
Largest recent trade: Kummeth Charles R., QSI's Director, spent $459.8K of their own money on 500,000 shares at $1, growing their stake 141%.
Most active filer: Keyes Jeffry R., with 6 transactions among the recent filings shown.
Insider transaction history
Form 4 filings for QSI, newest firstQSI
−$83.3K
83,712 sh @ $1
QSI
−$37.6K
37,382 sh @ $1
QSI
−$84.2K
83,712 sh @ $1
QSI
−$3.7K
4,422 sh @ $1
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QSI
−$5.1K
6,110 sh @ $1
QSI
−$9.3K
11,239 sh @ $1
QSI
−$10K
12,149 sh @ $1
QSI
−$3.6K
4,233 sh @ $1
QSI
−$5K
5,849 sh @ $1
QSI
−$9.1K
10,758 sh @ $1
QSI
−$9.9K
11,628 sh @ $1
QSI
+$0
652,803 sh
QSI
+$0
391,681 sh
QSI
+$0
1.31M sh
QSI
+$0
261,121 sh
QSI
Kummeth Charles R., QSI's Director, spent $459.8K of their own money on 500,000 shares at $1, growing their stake 141%.
+$459.8K
500,000 sh @ $1
QSI
Dowdy Paula, QSI's Director, spent $104.5K of their own money on 109,890 shares at $1, growing their stake 69%.
+$104.5K
109,890 sh @ $1
QSI
−$28K
21,927 sh @ $1
QSI
−$15.2K
11,951 sh @ $1
QSI
−$11K
8,627 sh @ $1
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About QSI insider activity
This page tracks every recent Form 4 filed for Quantum-Si Inc with the U.S. Securities and Exchange Commission. Form 4 is the disclosure that company insiders — officers, directors, and holders of more than 10% of the stock — must file within two business days of buying or selling shares.
The summary above nets open-market purchases against open-market sales over the trailing 90 days. Open-market trades (codes P and S) tend to carry the most signal because they reflect a deliberate choice to put money in or take it out, as opposed to routine grants, option exercises, or tax-withholding events. Use the badges on each row to tell them apart, and always confirm details against the original filing before drawing conclusions.
Frequently asked questions
How often is QSI insider data updated?
Continuously. We read from SEC EDGAR, so new Form 4 filings for Quantum-Si Inc usually appear here within minutes of being accepted by the SEC.
What does "net insider flow" mean?
It is the total dollar value of open-market insider purchases minus open-market sales over the last 90 days. A positive number (green) means insiders bought more than they sold; a negative number (red) means the reverse.
Why do some rows show grants or option exercises instead of buys?
Insiders receive stock through compensation as well as buying it outright. Form 4 captures all of these. We label each transaction by its SEC code so you can focus on open-market activity if you prefer.
Is this investment advice?
No. InsiderSource presents public filing data for informational purposes only. Insider activity is one of many factors to consider and is never a recommendation to buy or sell.