---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-25-035576"
form_type: "8-K"
ticker: "CYN"
cik: "0001874097"
company_name: "Cyngn Inc."
filed_at: "2025-04-25T23:59:59+00:00"
generated_at: "2026-05-23T06:07:08.532655+00:00"
event_type: "other"
sentiment: "negative"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Cyngn replaces auditor Marcum with CBIZ after resignation; material weakness in internal controls

## Summary
- Marcum LLP resigned as independent auditor on April 23, 2025; CBIZ CPAs P.C. engaged same day for FY2025.
- Marcum's 2023 and 2024 reports included going-concern explanatory paragraph about substantial doubt.
- Material weakness in internal controls over financial reporting related to oversight of third parties in financial reporting process.
- No disagreements with Marcum on accounting principles or audit scope.
- Audit committee and board approved the engagement of CBIZ.

## SEC filing metadata
- accession: 0001213900-25-035576
- form_type: 8-K
- ticker: CYN
- cik: 0001874097
- company_name: Cyngn Inc.
- filed_at: 2025-04-25T23:59:59+00:00
- event_type: other
- sentiment: negative
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 4.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1874097/000121390025035576/0001213900-25-035576-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1874097/000121390025035576/ea0239509-8k_cyngn.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-25-035576
- JSON: https://secwatch.observer/filing/0001213900-25-035576.json
- Plain text: https://secwatch.observer/filing/0001213900-25-035576.txt

## Key facts
- Auditor Changes
  Cyngn Inc. engaged CBIZ CPAs P.C. as its auditor.
  - Action: engagement
  - Auditor: CBIZ CPAs P.C.
  source text: On April 23, 2025, following the approval of the Audit Committee of the Company’s Board of Directors and the Company’s Board of Directors, CBIZ was engaged, effective immediately, as the Company’s independent registered public accounting firm for the year ending December 31, 2025.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1874097/000121390025035576/0001213900-25-035576-index.htm
- Auditor Changes
  Marcum LLP resigned as auditor of Cyngn Inc..
  - Action: resignation
  - Auditor: Marcum LLP
  source text: On April 23, 2025, Cyngn Inc. (the “Company”) was notified by Marcum LLP (“Marcum”) that Marcum resigned as the Company’s independent registered accounting firm.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1874097/000121390025035576/0001213900-25-035576-index.htm

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