Quantum-Si Inc

Quantum-Si Incorporated (Nasdaq: QSI) is a life sciences semiconductor company focused on next-generation protein sequencing technology, having gone public in 2021 through a merger with HighCape Capital Acquisition Corp., a blank-check vehicle sponsored by HighCape Capital Management. The company develops semiconductor chips designed to enable single-molecule protein sequencing, positioning itself at the intersection of semiconductor engineering and proteomics. As of its 8-K current report filed with the SEC on August 13, 2026 (accession 0001816431-26-000053), Quantum-Si remains an active Nasdaq-listed company operating in the life sciences tools and diagnostics sector. Full filing details, ownership data, and real-time SPAC deal analytics for QSI and hundreds of comparable transactions are available to subscribers at SpacDesk — sign up today for comprehensive coverage.