The Vanguard Group's Amendment to Schedule 13G/A for Quantum-Si Inc

The Vanguard Group has filed an amendment to its Schedule 13G/A for Quantum-Si Inc, reporting ownership of 8,714,507 shares, which represents 4.77% of the company's common stock. The filing indicates that The Vanguard Group has sole dispositive power over 7,665,147 shares and shared dispositive power over 1,049,360 shares. The shares are held by The Vanguard Group's clients, including investment companies registered under the Investment Company Act of 1940 and other managed accounts. The filing certifies that the securities were acquired and are held in the ordinary course of business and not for the purpose of influencing the control of the issuer. The amendment was signed by Ashley Grim, Head of Global Fund Administration, on October 30, 2025.