---
schema_version: "secwatch.filing_event.v1"
accession: "0001829126-24-008371"
form_type: "8-K/A"
ticker: "ADNH"
cik: "0001744494"
company_name: "ADVENT TECHNOLOGIES HOLDINGS, INC."
filed_at: "2024-12-18T23:59:59+00:00"
generated_at: "2026-05-29T02:03:07.261820+00:00"
event_type: "leadership"
sentiment: "negative"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Advent Technologies clarifies former CEO Gregoriou also removed from board

## Summary
- Vassilios Gregoriou terminated as CEO and Acting CFO effective Oct 24, 2024.
- Gregoriou also removed from the Board of Directors on same date per employment agreement.
- Gary Herman serving as CEO per signature block on December 18, 2024 filing.
- Filing is an amendment to clarify board removal not previously disclosed.
- Company ticker ADN; shares traded on Nasdaq.

## SEC filing metadata
- accession: 0001829126-24-008371
- form_type: 8-K/A
- ticker: ADNH
- cik: 0001744494
- company_name: ADVENT TECHNOLOGIES HOLDINGS, INC.
- filed_at: 2024-12-18T23:59:59+00:00
- event_type: leadership
- sentiment: negative
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1744494/000182912624008371/0001829126-24-008371-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1744494/000182912624008371/adventtech_8ka.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001829126-24-008371
- JSON: https://secwatch.observer/filing/0001829126-24-008371.json
- Plain text: https://secwatch.observer/filing/0001829126-24-008371.txt

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