---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-026176"
form_type: "8-K"
ticker: "QNRX"
cik: "0001671502"
company_name: "Quoin Pharmaceuticals, Ltd."
filed_at: "2025-03-20T23:59:59+00:00"
generated_at: "2026-05-24T10:18:17.322852+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.35
calibrated_materiality_score: 0.35
confidence: "high"
source: SEC EDGAR
---

# Quoin Pharmaceuticals replaces auditor Marcum LLP with CBIZ CPAs after attest business acquisition

## Summary
- Marcum LLP resigned as auditor on March 18, 2025; CBIZ CPAs P.C. engaged effective immediately for FY 2025.
- Change follows CBIZ CPAs' acquisition of Marcum's attest business effective November 1, 2024.
- Marcum's FY 2023 and 2024 reports contained no adverse opinion, qualification, disagreements, or reportable events.
- Engagement approved by Audit Committee; Marcum provided agreement letter attached as Exhibit 16.1.

## SEC filing metadata
- accession: 0001104659-25-026176
- form_type: 8-K
- ticker: QNRX
- cik: 0001671502
- company_name: Quoin Pharmaceuticals, Ltd.
- filed_at: 2025-03-20T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.35
- calibrated_materiality_score: 0.35
- confidence: high
- sec_items: 4.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1671502/000110465925026176/0001104659-25-026176-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1671502/000110465925026176/tm259900d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-026176
- JSON: https://secwatch.observer/filing/0001104659-25-026176.json
- Plain text: https://secwatch.observer/filing/0001104659-25-026176.txt

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