Exhibit 99.1 Quantum-Si Reports First Quarter 2024 Financial Results Executed Full Commercial Launch of Platinum® Instrument Reaffirms 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 ● Reported revenue of $457,000 in the first quarter of 2024 ● Commenced its ...