On November 22, 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 Quarterly Report on Form 10-Q for the period ended September 30, 2024 was not filed with the Securities and Exchange Commission by the required due date of November 20, 2024. This Letter received from Nasdaq has no immediate effect on the listing or trading of the Company's shares.

Under Nasdaq rules, the Company now has until Tuesday, January 21, 2025, to submit a plan to regain compliance with Nasdaq Listing Rules. If Nasdaq accepts the Company's plan, Nasdaq may grant an exception until Monday, May 19, 2025, as instructed by the Letter, to regain compliance with the Nasdaq Listing Rules. However, there is no assurance that Nasdaq will accept the Company's plan to regain compliance or, if accepted, that the Company will be able to regain compliance with Nasdaq's rules by May 19, 2025.

The Company expects and intends to submit to Nasdaq a compliance plan no later than January 21, 2025.