John S. Vieceli is CPO at Quantum-Si Inc (QSI). They have made 8 open-market trades across 1 company since 2024, most recently 2026-06-23.
CIK 0002032947
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 8 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| QSI | 1,140,434 | $1.3M |
Shares reported on the most recent Form 4, priced at the 2026-06-24 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| QSI | SELL | 2026-06-22 | 2026-06-24 | $0.93 | $28K | +7.9% | -10.6% | -8.4% |
| QSI | SELL | 2026-03-20 | 2026-03-24 | $0.84 | $37K | -15.2% | +9.4% | +7.8% |
| QSI | SELL | 2025-12-22 | 2025-12-22 | $1.28 | $28K | +0.8% | -1.6% | -28.2% |
| QSI | SELL | 2025-09-22 | 2025-09-24 | $1.66 | $33K | +19.1% | +50.7% | -19.1% |
| QSI | SELL | 2025-06-23 | 2025-06-24 | $1.61 | $35K | -10.3% | -2.7% | -16.5% |
| QSI | SELL | 2025-03-21 | 2025-03-24 | $1.39 | $6K | -20.5% | -19.9% | +13.0% |
| QSI | SELL | 2024-12-23 | 2024-12-26 | $1.29 | $6K | -22.6% | -35.2% | -59.2% |
| QSI | SELL | 2024-09-23 | 2024-09-25 | $0.94 | $4K | -10.5% | -19.8% | +39.9% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.