---
schema_version: "secwatch.filing_event.v1"
accession: "0001829126-24-006387"
form_type: "8-K"
ticker: "ADNH"
cik: "0001744494"
company_name: "ADVENT TECHNOLOGIES HOLDINGS, INC."
filed_at: "2024-09-20T23:59:59+00:00"
generated_at: "2026-05-31T02:50:54.729769+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.9
calibrated_materiality_score: 0.9
confidence: "high"
source: SEC EDGAR
---

# Advent Technologies dismisses EY as auditor, appoints M&K; loses EU grant eligibility

## Summary
- Ernst & Young (EY) resigned as auditor on Sept 17, 2024; Audit Committee appointed M&K CPAS, PLLC on Sept 20.
- EY's 2023 audit report included a going concern explanatory paragraph; no other disagreements except a material weakness in internal controls.
- Subsidiary Advent Technologies SA notified on Sept 16, 2024 by Greek Ministry of Finance of ineligibility for IPCEI grant (Green HiPo) due to financial condition.
- Advent Technologies SA filed an appeal against the grant ineligibility decision.
- No disagreements or reportable events occurred with EY during the past two fiscal years and subsequent interim period.

## SEC filing metadata
- accession: 0001829126-24-006387
- form_type: 8-K
- ticker: ADNH
- cik: 0001744494
- company_name: ADVENT TECHNOLOGIES HOLDINGS, INC.
- filed_at: 2024-09-20T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.9
- calibrated_materiality_score: 0.9
- confidence: high
- sec_items: 4.01, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1744494/000182912624006387/0001829126-24-006387-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1744494/000182912624006387/adventtechnologies_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001829126-24-006387
- JSON: https://secwatch.observer/filing/0001829126-24-006387.json
- Plain text: https://secwatch.observer/filing/0001829126-24-006387.txt

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