---
schema_version: "secwatch.filing_event.v1"
accession: "0001829126-25-003930"
form_type: "8-K"
ticker: "ADNH"
cik: "0001744494"
company_name: "ADVENT TECHNOLOGIES HOLDINGS, INC."
filed_at: "2025-05-27T23:59:59+00:00"
generated_at: "2026-05-20T11:00:41.041039+00:00"
event_type: "regulatory"
sentiment: "negative"
materiality_score: 0.85
calibrated_materiality_score: 0.85
confidence: "high"
source: SEC EDGAR
---

# Advent Technologies receives Nasdaq delisting notice for missing 10-Q and 10-K deadlines

## Summary
- Nasdaq notified Advent on May 22, 2025 of non-compliance with Listing Rule 5250(c)(1) due to late 10-Q (March 31, 2025) and 10-K (Dec 31, 2024).
- No immediate effect on listing or trading; company has until June 16, 2025 to submit a compliance plan.
- If Nasdaq accepts the plan, an exception may be granted until October 13, 2025 to regain compliance.
- Company expects to submit a plan by June 16, 2025, but there is no assurance of acceptance or eventual compliance.

## SEC filing metadata
- accession: 0001829126-25-003930
- form_type: 8-K
- ticker: ADNH
- cik: 0001744494
- company_name: ADVENT TECHNOLOGIES HOLDINGS, INC.
- filed_at: 2025-05-27T23:59:59+00:00
- event_type: regulatory
- sentiment: negative
- materiality_score: 0.85
- calibrated_materiality_score: 0.85
- confidence: high
- sec_items: 3.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1744494/000182912625003930/0001829126-25-003930-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1744494/000182912625003930/adventtech_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001829126-25-003930
- JSON: https://secwatch.observer/filing/0001829126-25-003930.json
- Plain text: https://secwatch.observer/filing/0001829126-25-003930.txt

## Key facts
- Listing & Compliance Notices
  ADVENT TECHNOLOGIES HOLDINGS, INC. received a nasdaq deficiency notice notice regarding late filing (rules 5250(c)(1)).
  - Exchange: nasdaq
  - Notice: deficiency notice
  - Deficiency: late filing
  - Rules: 5250(c)(1)
  source text: May 22, 2025, Advent Technologies Holdings, Inc. (the “Company”) received a letter (the “Letter”) from the Listing Qualifications Department of the Nasdaq Stock Market (“Nasdaq”) notifying the Company that it is not in compliance with periodic requirements for continued listing set forth in Nasdaq Listing Rule 5250(c)(1) because the Company’s Quarterly Report on Form 10-Q for the period ended March 31, 2025 was not filed with the Securities and Exchange Commission by the required due date of May 15, 2025, and because the Company’s Annual Report on Form 10-K for the year ended December 31, 2024
  evidence_url: https://www.sec.gov/Archives/edgar/data/1744494/000182912625003930/0001829126-25-003930-index.htm

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