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QSI
Ticker

Quantum-Si Inc

QSI

Quantum-Si Inc (QSI) has 2 disclosed filings on Paydirt over the trailing twelve months from 2 corporate insiders: 2 purchases and 0 sales. Filers took a median of 4 days from execution to disclosure, and the most recent trade was executed Mar 5 and filed Mar 9. The most active filer was Paula Dowdy with 1 filing. Data as of Nov 8 2026.

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Filings, ttm
2
2 buys · 0 sells
Traders, ttm
2
2 insiders
Volume, ttmiDollar value disclosed in the window
$564K
estimated for Congress, as filed for insiders
Median delay
4d
execution to disclosure
Last traded
Mar 5
Filed Mar 9
ADViAverage daily dollar volume
–
not on file
Share price · 12M
$0.74 (-53.6%)
$1.60$1.15$0.70Nov 10 2025Mar 30Aug 14

Adjusted for splits and dividends.

Volume by month
$11.7M$5.9M$0Dec 2024Jun 2025Dec 2025Jun 2026Dec 2024 · sells $11.7MMar 2026 · buys $564K
Buys $564K Sells $11.7M

Estimated for Congress, as filed for insiders · by filing month · past 24 months

Who filed · past 24 months
PD Paula Dowdy Director 1 filing · 1 buy, 0 sales CK Charles R. Kummeth Director 1 filing · 1 buy, 0 sales JR Jonathan M Rothberg Director 1 filing · 0 buys, 1 sale
Recent filings
Charles R. KummethPURCHASE Director $460K
500,000 sh × $0.92
Exec Mar 5
Filed Mar 9 · 6:01 AM ET Paula DowdyPURCHASE Director $104K
109,890 sh × $0.95
Exec Mar 5
Filed Mar 9 · 6:01 AM ET Jonathan M RothbergSALE Director $11.7M
3,506,267 sh across 8 lots
Exec Dec 27 2024
Filed Dec 31 2024 · 5:30 PM ET