---
schema_version: "secwatch.filing_event.v1"
accession: "0001829126-25-008803"
form_type: "8-K"
ticker: "ADNH"
cik: "0001744494"
company_name: "ADVENT TECHNOLOGIES HOLDINGS, INC."
filed_at: "2025-11-03T23:59:59+00:00"
generated_at: "2026-05-17T00:54:56.198948+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.95
calibrated_materiality_score: 0.95
confidence: "high"
source: SEC EDGAR
---

# Advent Technologies directors resign; Nasdaq delisting starts Oct 28, effective Oct 30

## Summary
- Directors Marc Seelenfreund (Oct 29) and Joseph Celia (Oct 30) resigned; no disagreement cited.
- Nasdaq commenced delisting proceedings for common stock (ADN) and warrants (ADNWW) on Oct 28, effective Oct 30.
- Trading suspension begins Oct 30, 2025; no further details on appeal or cause.

## SEC filing metadata
- accession: 0001829126-25-008803
- form_type: 8-K
- ticker: ADNH
- cik: 0001744494
- company_name: ADVENT TECHNOLOGIES HOLDINGS, INC.
- filed_at: 2025-11-03T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.95
- calibrated_materiality_score: 0.95
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1744494/000182912625008803/0001829126-25-008803-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1744494/000182912625008803/adventtech_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001829126-25-008803
- JSON: https://secwatch.observer/filing/0001829126-25-008803.json
- Plain text: https://secwatch.observer/filing/0001829126-25-008803.txt

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