---
schema_version: "secwatch.filing_event.v1"
accession: "0001829126-24-002723"
form_type: "8-K"
ticker: "ADNH"
cik: "0001744494"
company_name: "ADVENT TECHNOLOGIES HOLDINGS, INC."
filed_at: "2024-04-23T23:59:59+00:00"
generated_at: "2026-06-03T12:07:49.832159+00:00"
event_type: "regulatory"
sentiment: "negative"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Advent Technologies receives Nasdaq deficiency notice for late 10-K filing

## Summary
- Nasdaq notified Advent on April 17, 2024 that it missed the March 31 deadline to file its 2023 Form 10-K.
- No immediate delisting; Advent has until June 16, 2024 to submit a compliance plan to regain listing.
- If Nasdaq accepts the plan, an exception may extend the compliance deadline to October 14, 2024.
- Company expects to submit its compliance plan by April 30 and targets filing the 10-K in May 2024.

## SEC filing metadata
- accession: 0001829126-24-002723
- form_type: 8-K
- ticker: ADNH
- cik: 0001744494
- company_name: ADVENT TECHNOLOGIES HOLDINGS, INC.
- filed_at: 2024-04-23T23:59:59+00:00
- event_type: regulatory
- sentiment: negative
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 3.01, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1744494/000182912624002723/0001829126-24-002723-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1744494/000182912624002723/adventtech_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001829126-24-002723
- JSON: https://secwatch.observer/filing/0001829126-24-002723.json
- Plain text: https://secwatch.observer/filing/0001829126-24-002723.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: April 17, 2024, 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 Annual Report on Form 10-K for the fiscal year ended December 31, 2023 (the “2023 Form 10-K”) was not filed with the Securities and Exchange Commission by the required due date of March 31, 2024. This Letter received from Nasdaq has no immediate effect
  evidence_url: https://www.sec.gov/Archives/edgar/data/1744494/000182912624002723/0001829126-24-002723-index.htm

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