Quantum-Si IncorporatedQSI
About: Quantum-Si Inc is a life sciences company focused on the development and commercialization of proteomics research tools. The company has designed and developed a hardware, consumable, and software solution to provide a solution for protein detection and analysis. It has developed a proprietary universal single-molecule detection platform that enables Next-Generation Protein Sequencing (NGPS), the ability to sequence proteins.
Employees: 143
Fund manager confidence
Based on 2025 Q2 regulatory disclosures by fund managers ($100M+ AUM)
79% more capital invested
Capital invested by funds: $69.2M [Q1] → $124M (+$55M) [Q2]
67% more repeat investments, than reductions
Existing positions increased: 55 | Existing positions reduced: 33
10% more call options, than puts
Call options by funds: $2.33M | Put options by funds: $2.11M
3.37% more ownership
Funds ownership: 35.36% [Q1] → 38.73% (+3.37%) [Q2]
0% more first-time investments, than exits
New positions opened: 15 | Existing positions closed: 15
2% less funds holding
Funds holding: 134 [Q1] → 131 (-3) [Q2]
Research analyst outlook
We haven’t received any recent analyst ratings for QSI.
Financial journalist opinion
Based on 9 articles about QSI published over the past 30 days









