---
schema_version: "secwatch.filing_event.v1"
accession: "0001140361-24-029281"
form_type: "8-K"
ticker: "QSI"
cik: "0001816431"
company_name: "Quantum-Si Inc"
filed_at: "2024-06-07T23:59:59+00:00"
generated_at: "2026-06-01T05:39:41.558916+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Quantum-Si dismisses Deloitte, appoints PwC as auditor; discloses prior material weaknesses

## Summary
- Appointed PwC as independent auditor for FY2024, effective June 4, 2024, subject to client acceptance.
- Dismissed Deloitte; no disagreements on accounting principles in fiscal years 2022 and 2023.
- Disclosed material weaknesses from 2022: inaccurate warrant accounting and lack of in-house finance expertise.
- Deloitte's letter agreeing with disclosures filed as Exhibit 16.1.

## SEC filing metadata
- accession: 0001140361-24-029281
- form_type: 8-K
- ticker: QSI
- cik: 0001816431
- company_name: Quantum-Si Inc
- filed_at: 2024-06-07T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 4.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1816431/000114036124029281/0001140361-24-029281-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1816431/000114036124029281/ef20030855_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001140361-24-029281
- JSON: https://secwatch.observer/filing/0001140361-24-029281.json
- Plain text: https://secwatch.observer/filing/0001140361-24-029281.txt

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