---
schema_version: "secwatch.filing_event.v1"
accession: "0001816431-26-000053"
form_type: "8-K"
ticker: "QSI"
cik: "0001816431"
company_name: "Quantum-Si Inc"
filed_at: "2026-08-13T20:11:45+00:00"
generated_at: "2026-08-13T20:13:06.035445+00:00"
event_type: "earnings"
sentiment: "negative"
materiality_score: 0.8
calibrated_materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# Quantum-Si Q2 revenue falls 42% YoY; Proteus launch delayed to Q2 2027, cuts 20% staff

## Summary
- Q2 2026 revenue $344K vs $591K YoY; net loss $23.5M vs $28.8M.
- Proteus commercial launch pushed to Q2 2027 for additional design cycle.
- 20% workforce reduction; ~$12M annualized savings; cash runway extended to Q4 2028.
- Identifies $4B non-human proteomics market opportunity from Platinum work.

## SEC filing metadata
- accession: 0001816431-26-000053
- form_type: 8-K
- ticker: QSI
- cik: 0001816431
- company_name: Quantum-Si Inc
- filed_at: 2026-08-13T20:11:45+00:00
- event_type: earnings
- sentiment: negative
- materiality_score: 0.8
- calibrated_materiality_score: 0.8
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1816431/000181643126000053/0001816431-26-000053-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1816431/000181643126000053/qsi-20260813.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001816431-26-000053
- JSON: https://secwatch.observer/filing/0001816431-26-000053.json
- Plain text: https://secwatch.observer/filing/0001816431-26-000053.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.