Welcome to our dedicated page for Advent Technologies Holdng SEC filings (Ticker: ADN), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
Fuel-cell patents, Department of Defense contracts, and high-temperature membrane breakthroughs make Advent Technologies’ disclosures anything but light reading. When a single 10-K annual report can exceed 300 pages of technical detail, locating the R&D line items or understanding new hydrogen-supply agreements becomes a real challenge for investors.
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Advent Technologies Holdings, Inc. (ADN) files an S-1 describing a fuel-cell technology business built by experienced electrochemists and led by Dr. Emory De Castro. The company focuses on a high-temperature PEM membrane-electrode assembly (MEA) targeting 160-180°C operation and durability beyond 20,000 hours and lists marine, aviation and human portable power as end markets. As of June 30, 2025 the company had $0.1 million cash and 2,670,286 shares outstanding and reports no revenue recognized in the three- and six-month periods ending June 30, 2025. The filing discloses multiple short-term high-interest loans refinanced in 2025 with effective annual rates stated as ~292.82%, 250.67% and 206%. The company holds numerous warrants exercisable at $345.00 per share and notes material going-concern and covenant risks, overdue obligations, and the need for immediate additional funding to continue operations.
Advent Technologies Holdings, Inc. reported weak interim results with cash of $75 thousand and total assets of $6.69 million as of June 30, 2025. Revenue for the quarter was $99 thousand (down from $654 thousand a year earlier) and the company recorded a net loss of $3.797 million for the three months and $7.071 million for the six months ended June 30, 2025.
The balance sheet shows total liabilities of $36.112 million and a stockholders' deficit of $29.422 million, including a negative net working capital position of $27.8 million. Management discloses substantial doubt about the company’s ability to continue as a going concern and outlines reliance on additional equity or debt financing, recent high-cost short-term loans, a settlement with F.E.R. for approximately €5.37 million and the bankruptcy and liquidation of its Danish subsidiary, presented as discontinued operations.
Advent Technologies Holdings, Inc. filed a Form 8-K reporting that its wholly-owned subsidiary, Advent Technologies, Inc., finalized a partially exclusive field-of-use patent license with TRIAD National Security for the Ion Pair technology originally developed at Los Alamos National Laboratory. The Agreement, which supersedes a prior license between the parties, grants Advent Sub exclusivity in the marine, aviation, and portable power fields while Advent Sub retains non-exclusive rights in all other fields.
The filing attaches the press release as Exhibit 99.1 and a cover page interactive data file as Exhibit 104, and is signed by CEO Gary Herman on August 12, 2025. The document does not disclose financial terms, duration, or other commercial details of the Agreement.
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