John S. Vieceli sold $18k of QSI
Chief Product Officer at Quantum-Si Inc. 21,997 shares at an average of $0.84, traded Mar 20, 2026, filed Mar 24, 2026.
Score components
- +15RoleOfficer
- 0Trade size$18k at market
- 0Share of holdings soldSold 1.8% of holdings
- +15Cluster4 insiders selling within 14 days
What happened after comparable sells
Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.
This signal so far: 1m +10.6%, 3m +3.4%, 6m -7.8%.
Price around the trade, and since
From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™
Rows in this filing
Every transaction in Form 4 0001140361-26-010945, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Mar 20, 2026 | SOpen-market sale Class A Common Stock | -10,758 | $0.85 | $9,126 | 1,181,896 | Mar 24, 2026 |
| Mar 23, 2026 | SOpen-market sale Class A Common Stock | -11,239 | $0.83 | $9,290 | 1,170,657 | Mar 24, 2026 |
Related signals
Other insiders at Quantum-Si Inc and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| 40Moderate | Quantum-Si Inc | Jeffrey Alan Hawkins President & CEO | $23k 29,852 shares | -1% | |
| 37Weak | Quantum-Si Inc | Jeffry R. Keyes Chief Financial Officer | $5,806 7,665 shares | -0% | |
| 30Weak | Quantum-Si Inc | Christian LaPointe GC & Corp. Secretary | $11k 14,516 shares | -1% | |
| 40Moderate | Quantum-Si Inc | Jeffrey Alan Hawkins President & CEO | $21k 22,621 shares | -1% | |
| 37Weak | Quantum-Si Inc | Jeffry R. Keyes Chief Financial Officer | $7,642 8,233 shares | -0% | |
| 30Weak | Quantum-Si Inc | Christian LaPointe GC & Corp. Secretary | $14k 15,588 shares | -1% | |
| 35Weak | Quantum-Si Inc | John S. Vieceli Chief Product Officer | $28k 30,223 shares | -3% | |
| 44Moderate | Quantum-Si Inc | Jeffrey Alan Hawkins President & CEO | $168k 167,424 shares | -4% | |
| 38Weak | Quantum-Si Inc | Jeffry R. Keyes Chief Financial Officer | $75k 74,763 shares | -4% | |
| 40Moderate | Quantum-Si Inc | Jeffrey Alan Hawkins President & CEO | $20k 23,777 shares | -1% |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.