John S. Vieceli serves as Executive at Quantum-Si Inc, where they oversee executive responsibilities. Since joining the company, John S. Vieceli has executed 5 insider transactions totaling $64.8K, demonstrating a bearish approach to their equity position. Their most recent transaction on Dec 22, 2025 involved selling 21,927 shares valued at $28.1K.
John S. Vieceli currently holds 800,973 shares of Quantum-Si Inc (QSI), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, John S. Vieceli has been a net seller of QSI stock. They have purchased $0 and sold $64.8K worth of shares.
John S. Vieceli's most recent insider trade was on Dec 22, 2025, when they sold 21,927 shares at $1.28 per share.
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| $1.64 |
| Discretionary |
| Sep 22, 2025 | QSI | $16.5K | Sale | 9,843 | $1.68 | Discretionary |
| Sep 24, 2024 | QSI | $2.0K | Sale | 2,117 | $0.93 | Discretionary |
| Sep 23, 2024 | QSI | $2.1K | Sale | 2,192 | $0.95 | Discretionary |