Exhibit 99.1 Quantum-Si Reports First Quarter 2024 Financial Results Executed Full Commercial Launch of Platinum® Instrument Reaf irms Full Year 2024 Financial Guidance BRANFORD, Conn. -- (BUSINESS WIRE) – May 9, 2024 -- Quantum-Si Incorporated (Nasdaq: QSI) ("Quantum-Si," "QSI" or the "Company"), The Protein Sequencing CompanyTM, today announced financial results for the first quarter ended March 31, 2024. Press Release Highlights "We concluded our first quarter of 2024 with great momentum on all fronts, i ...