By CapitalSnitch Research Desk · updated Oct 11, 2026 · data from SEC filings and official Congress disclosures
QSI insiders were on both sides of the trade this year. Buys came to roughly $564,000 (two buyers), sales to $575,000 (five sellers).
Biggest single buyer: Kummeth Charles R., Director, with roughly $460,000.
Zooming out by quarter: 2 quarters in a row of net selling by insiders. Insiders bought in 1 of the last 7 full quarters. 141 investment managers listed QSI in their latest 13F filings (Q2 2026); more funds sold than bought.
Are insiders buying or selling QSI stock?
In the last 12 months Quantum-Si Inc insiders made open-market purchases worth about $564,000 and sales worth about $575,000. Data comes from SEC Form 4 filings, updated every 30 minutes on CapitalSnitch.
When was the last insider trade in QSI?
The most recent open-market insider trade in QSI was filed on 2026-09-23.
How many institutions own QSI?
141 investment managers reported holding QSI in SEC Form 13F filings for Q2 2026.
Has any member of Congress traded QSI?
No congressional trades in QSI were reported in the past two years. The full list is free on CapitalSnitch.
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Public-record data for research and education, not investment advice. Insider sales are often pre-planned (10b5-1).
Congress data: Data derived from public disclosures filed under the Ethics in Government Act and the STOCK Act, republished free for public transparency and news reporting. Disclosures may lag the trade by 45 days or more and show amounts only as ranges. This data may not be used for credit rating, loan underwriting, solicitation of money (political, charitable or other), direct-mail or commercial targeting (5 U.S.C. 13107).