Advent Technologies Granted 180-Day Extension by NASDAQ to Regain Compliance with Minimum Bid Requirement

Advent Technologies Holdings, Inc. (NASDAQ: ADN) ("Advent"), an innovation-driven leader in the fuel cell and hydrogen technology space, today announced that it has received a notification letter from Nasdaq Stock Market LLC ("Nasdaq") that the Company has been granted an additional 180-day compliance period, or until May 20, 2024, to regain compliance with Nasdaq's minimum bid price rule.

Nasdaq's determination is based on the Company meeting the continued listing requirement for market value of publicly held shares and all other applicable requirements for listing on Nasdaq, with the exception of the bid price requirement, and the Company's written notice of its intention to cure the deficiency during the second compliance period and if necessary, by effecting a reverse stock split.

In a notification letter dated May 24, 2023, Nasdaq previously informed the Company that, based on the previous 30 consecutive business days, the Company's ordinary shares no longer met the minimum $1.00 bid price per share requirement. Therefore, in accordance with Nasdaq's Listing Rules, the Company was provided 180 calendar days, or until November 20, 2023, to regain compliance.

If at any time before May 20, 2024, the closing bid price of the Company's ordinary shares is at least $1.00 per share for a minimum of 10 consecutive business days, the Company will regain compliance with this Nasdaq rule and this matter will be closed.

This current notification from Nasdaq has no immediate effect on the listing or trading of the Company's ordinary shares, which will continue to trade on Nasdaq under the symbol "ADN".

About Advent Technologies Holdings, Inc

Advent Technologies Holdings, Inc. is a U.S. corporation that develops, manufactures, and assembles complete fuel cell systems as well as supplying customers with critical components for fuel cells in the renewable energy sector. Advent is headquartered in Boston, Massachusetts, with offices in California, Greece, Denmark, Germany, and the Philippines. With more than 150 patents issued, pending, and/or licensed for fuel cell technology, Advent holds the IP for next-generation HT-PEM that enables various fuels to function at high temperatures and under extreme conditions, suitable for the automotive, aviation, defense, oil and gas, marine, and power generation sectors. For more information, visit www.advent.energy.

Cautionary Note Regarding Forward-Looking Statements

This press release includes forward-looking statements. These forward-looking statements generally can be identified by the use of words such as "anticipate," "expect," "plan," "could," "may," "will," "believe," "estimate," "forecast," "goal," "project," and other words of similar meaning. Each forward-looking statement contained in this press release is subject to risks and uncertainties that could cause actual results to differ materially from those expressed or implied by such statement. Applicable risks and uncertainties include, among others, the Company's ability to maintain the listing of the Company's common stock on Nasdaq; future financial performance; public securities' potential liquidity and trading; impact from the outcome of any known and unknown litigation; ability to forecast and maintain an adequate rate of revenue growth and appropriately plan its expenses; expectations regarding future expenditures; future mix of revenue and effect on gross margins; attraction and retention of qualified directors, officers, employees and key personnel; ability to compete effectively in a competitive industry; ability to protect and enhance Advent's corporate reputation and brand; expectations concerning its relationships and actions with technology partners and other third parties; impact from future regulatory, judicial and legislative changes to the industry; ability to locate and acquire complementary technologies or services and integrate those into the Company's business; future arrangements with, or investments in, other entities or associations; and intense competition and competitive pressure from other companies worldwide in the industries in which the Company will operate; and the risks identified under the heading "Risk Factors" in Advent's Annual Report on Form 10-K filed with the Securities and Exchange Commission ("SEC") on March 31, 2023, as well as the other information filed with the SEC. Investors are cautioned not to place considerable reliance on the forward-looking statements contained in this press release. You are encouraged to read Advent's filings with the SEC, available at www.sec.gov, for a discussion of these and other risks and uncertainties. The forward-looking statements in this press release speak only as of the date of this document, and the Company undertakes no obligation to update or revise any of these statements. Advent's business is subject to substantial risks and uncertainties, including those referenced above. Investors, potential investors, and others should give careful consideration to these risks and uncertainties.