Vieceli John S.
SEC insider (Form 3/4/5 filer). CIK 0002032947. Chief Product Officer at Quantum-Si Inc (QSI). 14 reported Form 4/5 transactions since Sep 2024; latest on Jun 23, 2026. Located in BRANFORD, CT.
Companies Vieceli John S. has filed insider reports for
- Quantum-Si Inc (QSI): Officer, Chief Product Officer
Vieceli John S.
CIK: 0002032947
Transaction Breakdown
Open Market Buys (P)0 (0.0%)
High conviction signal
Open Market Sales (S)12 (85.7%)
Position reduction
Option Exercises (M)0 (0.0%)
Derivative conversions
Awards (A)2 (14.3%)
Compensation grants
Other (G, F, J, C, D, …)0 (0.0%)
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Companies & Roles (1)
QSI
Quantum-Si Inc
Officer
Discretionary Trading P&L
Holdings
Transaction History (14 total)
- Jun 23, 2026QSI
Quantum-Si Inc
SaleDirect15.1K shares at avg. $0.90$14K - Jun 22, 2026QSI
Quantum-Si Inc
SaleDirect15.1K shares at avg. $0.96$14K - Mar 23, 2026QSI
Quantum-Si Inc
SaleDirect11.2K shares at avg. $0.83$9K - Mar 20, 2026QSI
Quantum-Si Inc
SaleDirect10.8K shares at avg. $0.85$9K - Mar 12, 2026QSI
Quantum-Si Inc
AwardDirect391.7K shares- - Dec 22, 2025QSI
Quantum-Si Inc
SaleDirect21.9K shares at avg. $1.28$28K - Sep 23, 2025QSI
Quantum-Si Inc
SaleDirect9.8K shares at avg. $1.64$16K - Sep 22, 2025QSI
Quantum-Si Inc
SaleDirect9.8K shares at avg. $1.68$17K - Jun 23, 2025QSI
Quantum-Si Inc
SaleDirect21.9K shares at avg. $1.61$35K - Mar 21, 2025QSI
Quantum-Si Inc
SaleDirect4.3K shares at avg. $1.39$6K
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Jun 23, 2026 | QSI Quantum-Si Inc | Sale | 15,112 | $0.90 | $13,586 | Direct |
| Jun 22, 2026 | QSI Quantum-Si Inc | Sale | 15,111 | $0.96 | $14,467 | Direct |
| Mar 23, 2026 | QSI Quantum-Si Inc | Sale | 11,239 | $0.83 | $9,290 | Direct |
| Mar 20, 2026 | QSI Quantum-Si Inc | Sale | 10,758 | $0.85 | $9,126 | Direct |
| Mar 12, 2026 | QSI Quantum-Si Inc | Award | 391,681 | - | $0 | Direct |
| Dec 22, 2025 | QSI Quantum-Si Inc | Sale | 21,927 | $1.28 | $27,979 | Direct |
| Sep 23, 2025 | QSI Quantum-Si Inc | Sale | 9,843 | $1.64 | $16,093 | Direct |
| Sep 22, 2025 | QSI Quantum-Si Inc | Sale | 9,843 | $1.68 | $16,562 | Direct |
| Jun 23, 2025 | QSI Quantum-Si Inc | Sale | 21,923 | $1.61 | $35,382 | Direct |
| Mar 21, 2025 | QSI Quantum-Si Inc | Sale | 4,317 | $1.39 | $5,981 | Direct |
1-10 of 14 transactions