---
schema_version: "secwatch.filing_event.v1"
accession: "0001829126-24-006581"
form_type: "8-K/A"
ticker: "ADNH"
cik: "0001744494"
company_name: "ADVENT TECHNOLOGIES HOLDINGS, INC."
filed_at: "2024-10-02T23:59:59+00:00"
generated_at: "2026-05-30T22:42:29.056553+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Advent Technologies dismisses EY as auditor, appoints M&K; EY letter attached

## Summary
- EY dismissed as independent auditor on Sept 17, 2024; M&K CPAS appointed on Sept 20, 2024.
- EY's audit reports for FY2023 and FY2022 included a going-concern explanatory paragraph but were unqualified.
- No disagreements with EY on accounting principles or auditing scope during FY2023 and through Sept 17, 2024.
- Material weakness in internal control over financial reporting disclosed in FY2024 10-K was noted as a reportable event.
- EY furnished a letter to SEC (Exhibit 16.1) agreeing with the company's statements in this report.

## SEC filing metadata
- accession: 0001829126-24-006581
- form_type: 8-K/A
- ticker: ADNH
- cik: 0001744494
- company_name: ADVENT TECHNOLOGIES HOLDINGS, INC.
- filed_at: 2024-10-02T23:59:59+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/1744494/000182912624006581/0001829126-24-006581-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1744494/000182912624006581/adventtech_8ka.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001829126-24-006581
- JSON: https://secwatch.observer/filing/0001829126-24-006581.json
- Plain text: https://secwatch.observer/filing/0001829126-24-006581.txt

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