John S. Vieceli

Companies

• Quantum-Si IncChief Product Officer Aug 12, 2024 to now¹

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• QSQuantum-Si Inc QSI1,140,434 shares²$1.5M at $1.31Jun 23, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

• Jun 23, 2026Sold 15,112 shares at $0.90 of Quantum-Si Inc²
• Jun 22, 2026Sold 15,111 shares at $0.96 of Quantum-Si Inc²
• Mar 23, 2026Sold 11,239 shares at $0.83 of Quantum-Si Inc³
• Mar 20, 2026Sold 10,758 shares at $0.85 of Quantum-Si Inc³
• Mar 12, 2026Granted 391,681 shares of Quantum-Si Inc⁴
• Dec 22, 2025Sold 21,927 shares at $1.28 of Quantum-Si Inc⁵
• Sep 23, 2025Sold 9,843 shares at $1.64 of Quantum-Si Inc⁶
• Sep 22, 2025Sold 9,843 shares at $1.68 of Quantum-Si Inc⁶
• Jun 23, 2025Sold 21,923 shares at $1.61 of Quantum-Si Inc⁷
• Mar 21, 2025Sold 4,317 shares at $1.39 of Quantum-Si Inc⁸
• Mar 12, 2025Granted 708,333 shares of Quantum-Si Inc⁹
• Dec 23, 2024Sold 4,306 shares at $1.29 of Quantum-Si Inc¹⁰
• Sep 24, 2024Sold 2,117 shares at $0.93 of Quantum-Si Inc¹¹
• Sep 23, 2024Sold 2,192 shares at $0.95 of Quantum-Si Inc¹¹