John S. Vieceli, Chief Product Officer at Quantum-Si Inc. ($QSIAW), sold shares on the open market five times in the last year, totaling just over $102 thousand. His most recent sale occurred on December 22, 2025. These sales rank him 9,547th among 11,678 insiders in our database by total value sold, compared to an average of $8.6 million per insider and about 6.4 transactions. Vieceli made no open market purchases during this period.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 20, 2026 | Quantum-Si Inc | $QSI | Vieceli John S. | Chief Product Officer | S | Class A Common Stock | 10758 | $0.85 | 1,181,896.0000 | 209,041,000 | 0.90% | 0.01% |
| March 23, 2026 | Quantum-Si Inc | $QSI | Vieceli John S. | Chief Product Officer | S | Class A Common Stock | 11239 | $0.83 | 1,170,657.0000 | 209,041,000 | 0.95% | 0.01% |
| March 12, 2026 | Quantum-Si Inc | $QSI | Vieceli John S. | Chief Product Officer | A | Stock Option (Right to Buy) | 468508 | $0.00 | 468,508.0000 | 209,041,000 | 9999.99% | 0.22% |
| March 12, 2026 | Quantum-Si Inc | $QSI | Vieceli John S. | Chief Product Officer | A | Class A Common Stock | 391681 | $0.00 | 1,192,654.0000 | 209,041,000 | 48.90% | 0.19% |
| Dec. 22, 2025 | Quantum-Si Inc | $QSI | Vieceli John S. | Chief Product Officer | S | Class A Common Stock | 21927 | $1.28 | 800,973.0000 | 209,041,000 | 2.66% | 0.01% |
| Sept. 22, 2025 | Quantum-Si Inc | $QSI | Vieceli John S. | Chief Product Officer | S | Class A Common Stock | 9843 | $1.68 | 832,743.0000 | 143,196,000 | 1.17% | 0.01% |
| Sept. 23, 2025 | Quantum-Si Inc | $QSI | Vieceli John S. | Chief Product Officer | S | Class A Common Stock | 9843 | $1.64 | 822,900.0000 | 143,196,000 | 1.18% | 0.01% |
| June 23, 2025 | Quantum-Si Inc | $QSI | Vieceli John S. | Chief Product Officer | S | Class A Common Stock | 21923 | $1.61 | 842,586.0000 | 143,196,000 | 2.54% | 0.02% |
| March 21, 2025 | Quantum-Si Inc | $QSI | Vieceli John S. | Chief Product Officer | S | Class A Common Stock | 4317 | $1.39 | 864,509.0000 | 143,196,000 | 0.50% | 0.00% |
| March 12, 2025 | Quantum-Si Inc | $QSI | Vieceli John S. | Chief Product Officer | A | Class A Common Stock | 708333 | $0.00 | 868,826.0000 | 143,196,000 | 441.35% | 0.49% |
| Dec. 23, 2024 | Quantum-Si Inc | $QSI | Vieceli John S. | Chief Product Officer | S | Class A Common Stock | 4306 | $1.29 | 160,493.0000 | 142,399,000 | 2.61% | 0.00% |
| Sept. 24, 2024 | Quantum-Si Inc | $QSI | Vieceli John S. | Chief Product Officer | S | Class A Common Stock | 2117 | $0.93 | 164,799.0000 | 141,300,000 | 1.27% | 0.00% |
| Sept. 23, 2024 | Quantum-Si Inc | $QSI | Vieceli John S. | Chief Product Officer | S | Class A Common Stock | 2192 | $0.95 | 166,916.0000 | 141,300,000 | 1.30% | 0.00% |