ADVENT TECHNOLOGIES HOLDINGS, INC. — fact timeline

ADVENT TECHNOLOGIES HOLDINGS, INC. issued convertible note to Chris Antonopoulos for CHF 500,000 principal amount of Secured Promissory Note.

“On January 8, 2026, Advent Technologies Holdings, Inc. (the “Company”) entered into a Secured Promissory Note in the aggregate principal amount of CHF 500,000 (the “Promissory Note”) with Chris Antonopoulos (the “Lender”), with interest accruing at an annual rate of eight and one-half percent (8.5%) to be computed on the basis of a 365-day year and the actual number of days elapsed.”

ADVENT TECHNOLOGIES HOLDINGS, INC. entered into Secured Promissory Note with Chris Antonopoulos valued at CHF 500,000 (effective 2026-01-08).

“On January 8, 2026, Advent Technologies Holdings, Inc. (the “Company”) entered into a Secured Promissory Note in the aggregate principal amount of CHF 500,000 (the “Promissory Note”) with Chris Antonopoulos (the “Lender”)”

ADVENT TECHNOLOGIES HOLDINGS, INC. received a nasdaq delisting notice notice regarding other (rules 5550(b)(1)).

“October 28, 2025, Advent Technologies Holdings, Inc. (the “Company”) received a notice (the “Notice”) from The Nasdaq Stock Market LLC (“Nasdaq”) notifying the Company that, due to the Company’s failure to comply with Nasdaq Listing Rule 5550(b)(1), Nasdaq determined to (a) commence proceedings to delist the Company’s common stock, par value $0.0001 per share (“Common Stock”) and the Company’s warrants to purchase one share of common stock, each at an exercise price of $345.00 (the “Public Warrants” and, together with the Common Stock, the “Securities”) and (b) suspend trading in the Securitie”

ADVENT TECHNOLOGIES HOLDINGS, INC. received a nasdaq delisting notice notice regarding stockholders equity (rules 5550(b)(1)).

“October 28, 2025, Advent Technologies Holdings, Inc. (the “Company”) received a notice (the “Notice”) from The Nasdaq Stock Market LLC (“Nasdaq”) notifying the Company that, due to the Company’s failure to comply with Nasdaq Listing Rule 5550(b)(1), Nasdaq determined to (a) commence proceedings to delist the Company’s common stock, par value $0.0001 per share (“Common Stock”) and the Company’s warrants to purchase one share of common stock, each at an exercise price of $345.00 (the “Public Warrants” and, together with the Common Stock, the “Securities”) and (b) suspend trading in the Securitie”

ADVENT TECHNOLOGIES HOLDINGS, INC. received a nasdaq delisting notice notice regarding stockholders equity (rules 5550(b)(1)).

“d Listing Rule or Standard; Transfer of Listing. As previously disclosed, on October 18, 2024, Advent Technologies Holdings, Inc. (the “Company”) was notified by the Listing Qualifications Department (the “Staff”) of the Nasdaq Stock Market (“Nasdaq”) that it was out of compliance with Listing Rule 5550(b)(1), which requires that the Company maintain stockholders’ equity of at least $2,500,000 for continued listing (the “Rule”), or to meet the alternatives of market value of listed securities or net income from continuing operations. The Staff previously granted the Company an exception to reg”

ADVENT TECHNOLOGIES HOLDINGS, INC. received a nasdaq deficiency notice notice regarding late filing (rules 5250(c)(1)).

“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”

ADVENT TECHNOLOGIES HOLDINGS, INC. received a nasdaq deficiency notice notice regarding late filing (rules 5250(c)(1)).

“April 16, 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 Annual Report on Form 10-K for the fiscal year ended December 31, 2024 (the “2024 10-K”) was not filed with the Securities and Exchange Commission by the required due date of March 31, 2025. This Letter received from Nasdaq has no immediate effect on th”

Joseph P. Celia was appointed as Class II Director at ADVENT TECHNOLOGIES HOLDINGS, INC..

“Effective as of November 4, 2024, Advent Technologies Holdings, Inc. (the “Company”) appointed Messrs. Seth M. Lukash and Joseph P. Celia to the Company’s Board of Directors as Class II directors.”

Seth M. Lukash was appointed as Class II Director at ADVENT TECHNOLOGIES HOLDINGS, INC..

“Effective as of November 4, 2024, Advent Technologies Holdings, Inc. (the “Company”) appointed Messrs. Seth M. Lukash and Joseph P. Celia to the Company’s Board of Directors as Class II directors.”

Christos Kaskavelis was terminated as Chief Strategy Officer at ADVENT TECHNOLOGIES HOLDINGS, INC..

“approved the termination of the employment of Christos Kaskavelis, Chief Strategy Officer of the Company, for cause, effective immediately.”

Gary Herman was appointed as Interim Chief Executive Officer at ADVENT TECHNOLOGIES HOLDINGS, INC..

“the Company’s board of directors appointed Mr. Gary Herman, who is currently serving as the Company’s Class I Director, to the additional role of interim chief executive officer, effective immediately”

Vassilios Gregoriou was terminated as Chief Executive Officer, Acting Chief Financial Officer at ADVENT TECHNOLOGIES HOLDINGS, INC..

“On October 24, 2024, the Board of Directors (the “Board”) of Advent Technologies Holdings, Inc. (the “Company”) approved the termination of the employment of Vassilios Gregoriou, the Chief Executive Officer, Acting Chief Financial Officer, for cause, effective immediately.”

Avtar Dhaliwal was appointed as Director at ADVENT TECHNOLOGIES HOLDINGS, INC..

“the Company’s Board of Directors appointed Gary Herman as a Class I Director and Marc Seelenfreund and Avtar Dhaliwal as Class II directors.”

Marc Seelenfreund was appointed as Director at ADVENT TECHNOLOGIES HOLDINGS, INC..

“the Company’s Board of Directors appointed Gary Herman as a Class I Director and Marc Seelenfreund and Avtar Dhaliwal as Class II directors.”

Gary Herman was appointed as Director at ADVENT TECHNOLOGIES HOLDINGS, INC..

“the Company’s Board of Directors appointed Gary Herman as a Class I Director and Marc Seelenfreund and Avtar Dhaliwal as Class II directors.”

Anggelos Skutaris resigned as Director at ADVENT TECHNOLOGIES HOLDINGS, INC..

“each of Nora Goudroupi, Wayne Threatt, Von McConnell, Larry Epstein and Anggelos Skutaris resigned as directors of the Company”

Larry Epstein resigned as Director at ADVENT TECHNOLOGIES HOLDINGS, INC..

“each of Nora Goudroupi, Wayne Threatt, Von McConnell, Larry Epstein and Anggelos Skutaris resigned as directors of the Company”

Von McConnell resigned as Director at ADVENT TECHNOLOGIES HOLDINGS, INC..

“each of Nora Goudroupi, Wayne Threatt, Von McConnell, Larry Epstein and Anggelos Skutaris resigned as directors of the Company”

Wayne Threatt resigned as Director at ADVENT TECHNOLOGIES HOLDINGS, INC..

“each of Nora Goudroupi, Wayne Threatt, Von McConnell, Larry Epstein and Anggelos Skutaris resigned as directors of the Company”

Nora Goudroupi resigned as Director at ADVENT TECHNOLOGIES HOLDINGS, INC..

“each of Nora Goudroupi, Wayne Threatt, Von McConnell, Larry Epstein and Anggelos Skutaris resigned as directors of the Company”

ADVENT TECHNOLOGIES HOLDINGS, INC.: Filed Certificate of Amendment to effect a 1-for-30 reverse stock split of common stock (effective 2024-05-13).

“On May 13, 2024, Advent Technologies Holdings, Inc. (the “Company”) filed a Certificate of Amendment (the “Certificate of Amendment”) to the Company’s Second Amended and Restated Certificate of Incorporation, as amended, with the Secretary of State of the State of Delaware to effect a 1-for-30 reverse stock split (the “Reverse Stock Split”) of the Company’s common stock, par value $0.0001 per share (“Common Stock”).”

ADVENT TECHNOLOGIES HOLDINGS, INC. shareholders approved To approve an amendment to the Company’s 2021 Equity Incentive Plan to increase the number of shares of Common Stock issuable under the Plan from 6,915,892 to 17,079,188 at the 2024-04-29 meeting.

“Votes For Votes Against Abstentions 15,673,164 4,327,892 65,965”

ADVENT TECHNOLOGIES HOLDINGS, INC. shareholders approved To approve an amendment to the Company’s Second Amended and Restated Certificate of Incorporation to effect a reverse stock split at a ratio in the range of 1-for-2 to 1-for-30 at the 2024-04-29 meeting.

“Votes For Votes Against Abstentions 30,061,928 3,125,713 33,801”

ADVENT TECHNOLOGIES HOLDINGS, INC. received a nasdaq deficiency notice notice regarding late filing (rules 5250(c)(1)).

“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”

Naiem Hussain resigned as Chief Financial Officer at ADVENT TECHNOLOGIES HOLDINGS, INC..

“accepted the resignation of Naiem Hussain, Chief Financial Officer ("CFO") from his positions at the Company, effective at close of business on March 11, 2024.”

Naiem Hussain was appointed as Chief Financial Officer at ADVENT TECHNOLOGIES HOLDINGS, INC..

“On January 10, 2024, the Board of Directors of the Company (the “Board”) appointed Naiem Hussain, 56, the Company’s current Chief Investment Officer, to serve as Chief Financial Officer of the Company, pending the completion of the Company’s hiring protocols.”

Naiem Hussain was appointed as Chief Financial Officer at ADVENT TECHNOLOGIES HOLDINGS, INC..

“the Board of Directors of the Company (the “Board”) on January 10, 2024, appointed Naiem Hussain, 56, the Company’s current Chief Investment Officer, to serve as Chief Financial Officer of the Company, pending the completion of the Company’s hiring protocols.”

Kevin L. Brackman resigned as Chief Financial Officer at ADVENT TECHNOLOGIES HOLDINGS, INC..

“On January 05, 2024, Kevin L. Brackman, Chief Financial Officer of Advent Technologies Holdings, Inc., a Delaware corporation (the “Company” or “Advent”), resigned from all of his positions at the Company and its subsidiaries, effective immediately.”

ADVENT TECHNOLOGIES HOLDINGS, INC. entered into Purchase Agreement with those certain purchasers named therein valued at $2,000,000 (effective 2023-12-22).

“On December 22, 2023, Advent Technologies Holdings, Inc. (the “Company”) entered into a Securities Purchase Agreement (the “Purchase Agreement”) with those certain purchasers named therein (the “Purchasers”) pursuant to which the Company agreed to issue and sell, in a public offering, directly to the Purchasers (the “Registered Direct Offering”), 10,000,000 shares of the Company’s common stock, par value $0.0001 per share (the “Common Stock”).”

ADVENT TECHNOLOGIES HOLDINGS, INC. received a nasdaq deficiency notice notice regarding minimum bid price (rules 5550(a)(2), 5810(c)(3)(A)).

“May 24, 2023, Advent Technologies Holdings, Inc. (the “ Company ”) received a letter from the Listing Qualifications Staff (the “ Staff ”) of Nasdaq Stock Market LLC (“ Nasdaq ”) indicating that the bid price of the Company’s common stock, par value $0.0001 per share (the “ Common Stock ”), had closed below $1.00 per share for 30 consecutive business days and, as a result, the Company was not in compliance with Nasdaq Listing Rule 5550(a)(2), which sets forth the minimum bid price requirement for continued listing on the Nasdaq Capital Market (the “ Minimum Bid Requirement ”). This initial l”

ADVENT TECHNOLOGIES HOLDINGS, INC. reported financial results for the three months ended September 30, 2023.

“On November 14, 2023, Advent Technologies Holdings, Inc., a Delaware corporation (the “Company”), issued a press release (the “Earnings Release”) reporting its financial results for the three and nine months ended September 30, 2023.”

ADVENT TECHNOLOGIES HOLDINGS, INC. reported financial results for the six months ended June 30, 2023.

“Advent Technologies Holdings, Inc., a Delaware corporation (the “Company”), issued a press release (the “Earnings Release”) reporting its financial results for the three and six months ended June 30, 2023.”

ADVENT TECHNOLOGIES HOLDINGS, INC. reported the three months ended June 30, 2023 results: revenue $1.1 million.

“end-to-end supply chain for hydrogen fuel cell systems in Europe. · Signed MoU with Safran Power Units to advance HT-PEM fuel cell technology for the aerospace sector. · Secured $1.1 million contract to supply HT-PEM MEAs for fuel cell-powered trucks in Asia. · Working actively with the Greek State for the timely signing of Advent’s Green HiPo project, following”

ADVENT TECHNOLOGIES HOLDINGS, INC.: Increased authorized common stock from 110,000,000 to 500,000,000 shares and added officer exculpation provision; filed Certificate of Amendment with Delaware Secretary of State on June 20, 2023 (effective 2023-06-20).

“At the Annual Meeting, the Company’s stockholders approved amendments (the “Amendments”) to (1) subsection (a) of Article IV of the Company’s Second Amended and Restated Certificate of Incorporation (the “Certificate of Incorporation”) to increase the Company’s number of shares of authorized common stock, par value $0.0001 per share, from 110,000,000 shares to 500,000,000 shares, with a corresponding increase in the Company’s total authorized capital stock, which includes common stock and preferred stock, from 111,000,000 shares to 501,000,000 shares; and (2) Article VI of the Certificate of Incorporation to permit the exculpation of our officers.”

ADVENT TECHNOLOGIES HOLDINGS, INC. shareholders approved Ratify appointment of Ernst & Young (Hellas) as independent auditor for FY2023 at the 2023-06-13 meeting.

“Proposal 5 : To ratify the appointment of Ernst & Young (Hellas) Certified Auditors Accountants S.A. as the Company’s independent registered public accounting firm”

ADVENT TECHNOLOGIES HOLDINGS, INC. shareholders approved Approve potential issuance of 20% or more of common stock pursuant to purchase agreement with Lincoln Park Capital Fund at the 2023-06-13 meeting.

“Proposal 4 : To approve, for purposes of complying with Nasdaq Listing Rule 5635(d), the potential issuance and sale of 20% or more of the Company’s common stock pursuant to the purchase agreement with Lincoln Park Capital Fund, LLC”

ADVENT TECHNOLOGIES HOLDINGS, INC. shareholders approved Approve amendment to Certificate of Incorporation to permit exculpation of officers at the 2023-06-20 meeting.

“The proposal was approved by a vote of stockholders as follows: Votes For Votes Against Abstentions 27,202,791 1,781,380 127,821”

ADVENT TECHNOLOGIES HOLDINGS, INC. shareholders approved Approve amendment to Certificate of Incorporation to increase authorized shares from 110,000,000 to 500,000,000 at the 2023-06-13 meeting.

“Proposal 2 : To approve an amendment to the Company’s Certificate of Incorporation to increase the number of authorized shares of the Company’s common stock”

ADVENT TECHNOLOGIES HOLDINGS, INC. shareholders approved Elect three Class III directors at the 2023-06-13 meeting.

“The voting results were as follows: Director Nominee Votes For Votes Withheld Broker Non-Votes Vassilios Gregoriou 24,546,093 946,610 7,071,248 Emory De Castro 18,971,078 6,521,625 7,071,248 Panoraia ‘Nora’ Gourdoupi 18,884,617 6,608,086 7,071,248”

ADVENT TECHNOLOGIES HOLDINGS, INC. entered into At The Market Offering Agreement with H.C. Wainwright & Co., LLC valued at up to $50 million (effective 2023-06-02).

“On June 2, 2023, Advent Technologies Holdings, Inc., a Delaware corporation (the “Company”), entered into an At The Market Offering Agreement (the “ATM Agreement”) with H.C. Wainwright & Co., LLC, as sales agent (the “Agent”), for an at-the-market equity program under which it may sell up to $50 million of shares”

ADVENT TECHNOLOGIES HOLDINGS, INC. received a nasdaq deficiency notice notice regarding minimum bid price (rules 5550(a)(2), 5810(c)(3)(A)).

“May 24, 2023, Advent Technologies Holdings, Inc. (the “ Company ”) received a letter from the Listing Qualifications Staff (the “ Staff ”) of the Nasdaq Stock Market LLC (“ Nasdaq ”) indicating that the bid price of the Company’s common stock, par value $0.0001 per share (the “ Common Stock ”), had closed below $1.00 per share for 30 consecutive business days and, as a result, the Company is not in compliance with Nasdaq Listing Rule 5550(a)(2), which sets forth the minimum bid price requirement for continued listing on the Nasdaq Capital Market (the “ Minimum Bid Requirement ”). Nasdaq’s noti”

ADVENT TECHNOLOGIES HOLDINGS, INC. reported the three months ended March 31, 2023 results: revenue $1.0 million, net income $(12.0) million, EPS $(0.23) per share.

“Q1 2023 Financial Highlights (All comparisons are to Q1 2022, unless otherwise stated) ● Revenue of $1.0 million and income from grants of $0.5 million, for a total of $1.5 million. ● Operating expenses of $11.6 million, a year-over-year decrease of $1.0 million, as administrative cost reductions implemented throughout 2022 were partially offset by an increase in research and development expenses. ● Net loss in Q1 of $(12.0) million or $(0.23) per share.”

ADVENT TECHNOLOGIES HOLDINGS, INC. entered into Purchase Agreement with Lincoln Park Capital Fund, LLC valued at up to $50,000,000 (effective 2023-04-10).

“On April 10, 2023, Advent Technologies Holdings, Inc. (the “Company”), entered into a purchase agreement (the “Purchase Agreement”) with Lincoln Park Capital Fund, LLC (“Lincoln Park”), which provides that, upon the terms and subject to the conditions and limitations set forth therein, the Company has the right, but not the obligation, to sell to Lincoln Park up to $50,000,000 worth of shares of the Company’s common stock”

ADVENT TECHNOLOGIES HOLDINGS, INC. reported year ended December 31, 2022 results: revenue $7.8 million.

“● Full year 2022 revenue of $7.8 million and income from grants of $1.5 million.”

ADVENT TECHNOLOGIES HOLDINGS, INC. reported Q4 2022 results: revenue $2.0 million, net income ($47.6 million), EPS ($0.92).

“● Q4 2022 revenue of $2.0 million and income from grants of $0.4 million. ● Full year 2022 revenue of $7.8 million and income from grants of $1.5 million. ● Net loss in Q4 of $47.6 million or $(0.92) per share, including an impairment charge of $38.9 million. Adjusted net loss in Q4 of $13.2 million or $(0.26) per share.”

ADVENT TECHNOLOGIES HOLDINGS, INC. reported the three months ended September 30, 2022 results: revenue $2.4 million, net income $11.5 million, EPS $0.22 per share.

“● Q3 revenue of $2.4 million, a 43% increase from the prior year third quarter. Income from grants was $0.3 million, and the total of revenue and income from grants was $2.7 million. ● Net loss in Q3 of $11.5 million or $0.22 per share.”

Von McConnell was appointed as Class I Director at ADVENT TECHNOLOGIES HOLDINGS, INC..

“On November 4, 2022, the Board of Directors (the “Board”) of Advent Technologies Holdings, Inc. (the “Company”) appointed Von McConnell as a Class I director with a term expiring at the Company’s 2024 annual meeting of stockholders.”

Panoraia 'Nora' Gourdoupi was appointed as Director at ADVENT TECHNOLOGIES HOLDINGS, INC..

“On July 20, 2022, the Board appointed Dr. Panoraia ‘Nora’ Gourdoupi as a director to fulfill the position vacated by Dr. Kaskavelis’ resignation.”

Christos Kaskavelis resigned as Director at ADVENT TECHNOLOGIES HOLDINGS, INC..

“On July 19, 2022, Dr. Christos Kaskavelis submitted his resignation from the Board of Directors (the “Board”) of Advent Technologies Holdings, Inc.”

Katrina Fritz resigned as Director at ADVENT TECHNOLOGIES HOLDINGS, INC..

“On May 27, 2022, Katrina Fritz provided notice to Advent Technologies Holdings, Inc. (the “Company”) of her resignation from the Board of Directors of the Company effective immediately.”