Quantum-Si (QSI) stock: insider trades, news & valuation
Net buyingShare price and insider trades
Quantum-Si insider trading at a glance (Oct 9, 2026): in the past 12 months, 2 insiders bought $564K and 5 sold $575K of QSI stock on the open market.
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QSI insider buying and selling by quarter
Open-market purchases (green, above the line) and sales (red, below), by trade date.
| Quarter | Bought | Purchases | Sold | Sales |
|---|---|---|---|---|
| Q4 2026 | — | 0 | — | 0 |
| Q3 2026 | — | 0 | $40K | 6 |
| Q2 2026 | — | 0 | $315K | 12 |
| Q1 2026 | $564K | 2 | $56K | 8 |
| Q4 2025 | — | 0 | $165K | 5 |
Valuation, profit and volume
Summary
Over the past 12 months, 2 Quantum-Si Inc insiders reported open-market purchases totaling $564K, while 5 insiders reported sales totaling $575K. 1 of 31 recorded sales were made under pre-scheduled Rule 10b5-1 trading plans, which are usually less informative than discretionary sales.
Insider transactions
Open-market purchases and sales.
| Filed | Insider | Type | Shares | Price | Value | Since | Score |
|---|---|---|---|---|---|---|---|
| Sep 23SEC | Jeffrey Alan HawkinsCEO, President | Sell | 20,1433,649,659 held (−1%) | $0.76 | $15K | +101.3% | — |
| Sep 23SEC | Christian LapointeGc & Corp. Secretary | Sell | 9,7951,172,634 held (−1%) | $0.76 | $7K | +101.3% | — |
| Sep 23SEC | Jeffrey Alan HawkinsCEO, President | Sell | 9,7093,639,950 held (−0%) | $0.76 | $7K | +101.3% | — |
| Sep 23SEC | Jeffry R. KeyesCFO | Sell | 5,1721,719,177 held (−0%) | $0.76 | $4K | +101.3% | — |
| Sep 23SEC | Christian LapointeGc & Corp. Secretary | Sell | 4,7211,167,913 held (−0%) | $0.76 | $4K | +101.3% | — |
| Sep 23SEC | Jeffry R. KeyesCFO | Sell | 2,4931,716,684 held (−0%) | $0.76 | $2K | +101.3% | — |
| Jun 24SEC | John S. VieceliChief Product Officer | Sell | 15,1111,155,546 held (−1%) | $0.96 | $15K | +59.4% | — |
| Jun 24SEC | John S. VieceliChief Product Officer | Sell | 15,1121,140,434 held (−1%) | $0.90 | $14K | +70.0% | — |
| Jun 24SEC | Jeffrey Alan HawkinsCEO, President | Sell | 11,3103,681,113 held (−0%) | $0.96 | $11K | +59.4% | — |
| Jun 24SEC | Jeffrey Alan HawkinsCEO, President | Sell | 11,3113,669,802 held (−0%) | $0.90 | $10K | +70.0% | — |
| Jun 24SEC | Christian LapointeGc & Corp. Secretary | Sell | 7,7941,190,223 held (−1%) | $0.96 | $7K | +59.4% | — |
| Jun 24SEC | Christian LapointeGc & Corp. Secretary | Sell | 7,7941,182,429 held (−1%) | $0.90 | $7K | +70.0% | — |
| Jun 24SEC | Jeffry R. KeyesCFO | Sell | 4,1161,728,466 held (−0%) | $0.96 | $4K | +59.4% | — |
| Jun 24SEC | Jeffry R. KeyesCFO | Sell | 4,1171,724,349 held (−0%) | $0.90 | $4K | +70.0% | — |
| Apr 22SEC | Jeffrey Alan HawkinsCEO, President | Sell | 83,7123,776,135 held (−2%) | $1.01 | $85K | +51.5% | — |
| Apr 22SEC | Jeffrey Alan HawkinsCEO, President | Sell | 83,7123,692,423 held (−2%) | $1.00 | $84K | +53.0% | — |
| Apr 22SEC | Jeffry R. KeyesCFO | Sell | 37,3821,769,963 held (−2%) | $1.01 | $38K | +51.5% | — |
| Apr 22SEC | Jeffry R. KeyesCFO | Sell | 37,3811,732,582 held (−2%) | $1.00 | $37K | +53.0% | — |
| Mar 24SEC | Jeffrey Alan HawkinsCEO, President | Sell | 12,1493,859,847 held (−0%) | $0.83 | $10K | +84.3% | — |
| Mar 24SEC | Jeffrey Alan HawkinsCEO, President | Sell | 11,6283,871,996 held (−0%) | $0.85 | $10K | +80.0% | — |
| Mar 24SEC | John S. VieceliChief Product Officer | Sell | 11,2391,170,657 held (−1%) | $0.83 | $9K | +84.3% | — |
| Mar 24SEC | John S. VieceliChief Product Officer | Sell | 10,7581,181,896 held (−1%) | $0.85 | $9K | +80.0% | — |
| Mar 24SEC | Christian LapointeGc & Corp. Secretary | Sell | 6,1101,198,017 held (−1%) | $0.83 | $5K | +84.3% | — |
| Mar 24SEC | Christian LapointeGc & Corp. Secretary | Sell | 5,8491,204,127 held (−0%) | $0.85 | $5K | +80.0% | — |
| Mar 24SEC | Jeffry R. KeyesCFO | Sell | 4,4221,807,345 held (−0%) | $0.83 | $4K | +84.3% | — |
| Mar 24SEC | Jeffry R. KeyesCFO | Sell | 4,2331,811,767 held (−0%) | $0.85 | $4K | +80.0% | — |
| Mar 9SEC | Charles R. KummethDirector | Buy | 500,000855,000 held (+141%) | $0.92 | $460K | +66.3% | — |
| Mar 9SEC | Paula DowdyDirector | Buy | 109,890269,107 held (+69%) | $0.95 | $104K | +61.1% | — |
| Dec 22SEC | Jeffrey Alan HawkinsCEO, President | Sell | 23,7072,578,018 held (−1%) | $1.28 | $30K | +19.5% | — |
| Dec 22SEC | John S. VieceliChief Product Officer | Sell | 21,927800,973 held (−3%) | $1.28 | $28K | +19.5% | — |
| Dec 22SEC | Christian LapointeGc & Corp. Secretary | Sell | 11,951948,855 held (−1%) | $1.28 | $15K | +19.5% | — |
| Dec 22SEC | Jeffry R. KeyesCFO | Sell | 8,6271,163,197 held (−1%) | $1.28 | $11K | +19.5% | — |
| Oct 17SEC | Jonathan M RothbergDirector | Sell Plan | 26,0951,904,866 held (−1%) | $3.07 | $80K | -50.2% | — |
Insiders at Quantum-Si Inc
| Insider | Bought | Sold | Last filing | Score |
|---|---|---|---|---|
| Charles R. KummethDirector | $460K | — | Mar 9, 2026 | — |
| Paula DowdyDirector | $104K | — | Mar 9, 2026 | — |
| Jeffrey Alan HawkinsCEO, President | — | $262K | Sep 23, 2026 | — |
| Jeffry R. KeyesCFO | — | $107K | Sep 23, 2026 | — |
| Jonathan M RothbergDirector | — | $80K | Oct 17, 2025 | — |
| John S. VieceliChief Product Officer | — | $75K | Jun 24, 2026 | — |
| Christian LapointeGc & Corp. Secretary | — | $51K | Sep 23, 2026 | — |
QSI stock: common questions
Are Quantum-Si Inc insiders buying QSI stock?
In the past 12 months, 2 insiders reported open-market purchases of QSI worth $564K. The latest was Director Charles R. Kummeth bought $460K of QSI at $0.92 — first open-market purchase in our records; raises the stake by 141%.
Are Quantum-Si Inc insiders selling QSI stock?
5 insiders reported sales worth $575K over the same period.
Where does this data come from?
Every transaction comes from Form 4 filings that insiders must submit to the SEC within two business days of a trade. We pull them from SEC EDGAR every night.
What is QSI's 52-week range?
Over the past year QSI has traded between $0.70 and $2.63. It last closed at $1.53 on Oct 9, 2026.