John S. Vieceli's Securities Transactions in Quantum-Si Inc

The filing details the securities transactions of John S. Vieceli, an officer at Quantum-Si Inc. The transactions include the vesting of restricted stock units and subsequent sales to cover tax withholding obligations. Specifically, Vieceli acquired 3,876 Class A Common Stock on March 15, 2024, and 15,810 Class A Common Stock on March 12, 2025, through restricted stock unit vesting. These shares were sold on September 22 and 23, 2025, to cover tax obligations, with sales totaling 19,686 shares. The transactions were mandated by Quantum-Si Inc's policy to satisfy tax withholding obligations through sell-to-cover transactions and do not represent discretionary trades by Vieceli. The filing also notes that Vieceli holds 728,175 Class A Common Stock as of the filing date.