Vieceli John S. plan to sell securities of Quantum-Si Inc under Form 144

Vieceli John S. filed Form 144 to notify SEC of plan to sell 21927 units of Quantum-Si Inc securities around 2025-12-22, with aggregate market value of $27,978.85. The total outstanding units is 673066.0. The amount planned to be sold represents 3.26% of total outstanding units; Recent transactions in past 3 months include: On 09/22/2025, sold 9843 units for $16561.83; On 09/23/2025, sold 9843 units for $16093.31;