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Advent Technologies Holdings, Inc.

ADNH · OTC

2 reporting failures in the last 12 months

Companies at this level ended the following year delisted, bankrupt, restated or silent 13.1% of the time, against 4.0% for companies with a clean record.

$7Mstalepublic float
2026-03-31most recent failure
2026-01-21delisted or deregistered

Score over time

0246202220232024202520262022-01-01 · score 22021-05-17 filed late (10-Q) · restatement2021-05-07 accounts unreliable2022-04-01 · score 22021-05-17 filed late (10-Q) · restatement2021-05-07 accounts unreliable2024-07-01 · score 22024-05-29 filed late (10-Q) · staff or resources2024-04-01 filed late (10-K) · staff or resources2024-10-01 · score 42024-09-20 auditor change2024-08-14 filed late (10-Q) · staff or resources2024-05-29 filed late (10-Q) · staff or resources2024-04-01 filed late (10-K) · staff or resources2025-01-01 · score 52024-11-14 filed late (10-Q) · accounts not ready2024-09-20 auditor change2024-08-14 filed late (10-Q) · staff or resources2024-05-29 filed late (10-Q) · staff or resources2024-04-01 filed late (10-K) · staff or resources2025-04-01 · score 62025-03-31 filed late (10-K) · auditor2024-11-14 filed late (10-Q) · accounts not ready2024-09-20 auditor change2024-08-14 filed late (10-Q) · staff or resources2024-05-29 filed late (10-Q) · staff or resources+1 more2025-07-01 · score 52025-05-14 filed late (10-Q) · accounts not ready2025-03-31 filed late (10-K) · auditor2024-11-14 filed late (10-Q) · accounts not ready2024-09-20 auditor change2024-08-14 filed late (10-Q) · staff or resources2025-10-01 · score 32025-05-14 filed late (10-Q) · accounts not ready2025-03-31 filed late (10-K) · auditor2024-11-14 filed late (10-Q) · accounts not ready2026-01-01 · score 32025-11-14 filed late (10-Q) · accounts not ready2025-05-14 filed late (10-Q) · accounts not ready2025-03-31 filed late (10-K) · auditor2026-04-01 · score 32026-03-31 filed late (10-K) · accounts not ready2025-11-14 filed late (10-Q) · accounts not ready2025-05-14 filed late (10-Q) · accounts not ready2026-07-01 · score 22026-03-31 filed late (10-K) · accounts not ready2025-11-14 filed late (10-Q) · accounts not ready2026-10-01 · score 22026-03-31 filed late (10-K) · accounts not ready2025-11-14 filed late (10-Q) · accounts not ready

Hover or tap a dot to see the filings behind that score.

Why they said they were late

Advent Technologies Holdings, Inc. (the “Company,” “we,” “us” or “our”) has determined that it is unable, without unreasonable effort or expense, to file its Annual Report on Form 10-K for the period ended December 31, 2025 (the “Form 10-K”) on or before the prescribed due date. The Company requires additional time to complete the final review of its financial statements and other disclosures in the Annual Report. The Company is, and has been, working diligently to complete its Form 10-K as soon as possible and anticipates that the Form 10-K will be filed within fifteen calendar days following the prescribed due date in compliance with Rule 12b-25(b). 1

NT 10-K, filed 2026-03-31 · accounts not ready

What it filed

2026-03-31filed late (10-K)accounts not ready SEC →

Advent Technologies Holdings, Inc. (the “Company,” “we,” “us” or “our”) has determined that it is unable, without unreasonable effort or expense, to file its Annual Report on Form 10-K for the period ended December 31, 2025 (the “Form 10-K”) on or before the prescribed due date. The Company requires additional time to complete the final review of its financial statements and other disclosures in the Annual Report. The Company is, and has been, working diligently to complete its Form 10-K as soon as possible and anticipates that the Form 10-K will be filed within fifteen calendar days following the prescribed due date in compliance with Rule 12b-25(b). 1

2025-11-14filed late (10-Q)accounts not ready SEC →

Advent Technologies Holdings, Inc. (the “Company”) has determined that it is unable, without unreasonable effort or expense, to file its Quarterly Report on Form 10-Q for the period ended September 30, 2025 (the “Quarterly Report”) by the prescribed due date. The Company requires additional time to complete the final review of its financial statements and other disclosures in the Quarterly Report. The Company is working diligently to complete the Quarterly Report as quickly as possible

2025-05-14filed late (10-Q)accounts not ready SEC →

Advent Technologies Holdings, Inc. (the “Company”) has determined that it is unable, without unreasonable effort or expense, to file its Quarterly Report on Form 10-Q for the period ended March 31, 2025 (the “Quarterly Report”) by the prescribed due date. The Company requires additional time to complete the final review of its financial statements and other disclosures in the Quarterly Report. The Company is working diligently to complete the Quarterly Report as quickly as possible

2025-03-31filed late (10-K)auditor SEC →

Advent Technologies Holdings, Inc. (the “Company,” “we,” “us” or “our”) has determined that it is unable, without unreasonable effort or expense, to file its Annual Report on Form 10-K for the period ended December 31, 2024 (the “Form 10-K”) on or before the prescribed due date. As previously disclosed in that certain Current Report on Form 8-K filed with the Securities and Exchange Commission on September 20, 2024, as amended by that certain Current Report on Form 8-K/A filed with the Securities and Exchange Commission on October 2, 2024, the Company engaged M&K CPAS, PLLC (“M&K”) as its new independent registered public accounting firm. M&K is working diligently to perform its initial audit of the Company’s financial statements for the fiscal year ended December 31, 2024, but will require additional time with the Company to complete the final review of the Company’s financial statements and other disclosures in the Annual Report. The Company and M&K are, and have been, working diligently to complete the Company’s Form 10-K as soon as possible and anticipate that the Form 10-K will be filed within fifteen calendar days following the prescribed due date in compliance with Rule 12b-25(b)

2024-11-14filed late (10-Q)accounts not ready SEC →

Advent Technologies Holdings, Inc. (the “Company,” “we,” “us” or “our”) has determined that it is unable, without unreasonable effort or expense, to file its Quarterly Report on Form 10-Q for the period ended September 30, 2024 (the “Form 10-Q”) on or before the prescribed due date. The Company requires additional time to complete the final review of its financial statements and other disclosures in the Quarterly Report. The Company is, and has been, working diligently to complete its Form 10-Q as soon as possible and anticipates that the Form 10-Q will be filed within five calendar days following the prescribed due date in compliance with Rule 12b-25(b)

2024-09-20auditor changed or resigned SEC →

2024-08-14filed late (10-Q)staff or resources SEC →

Advent Technologies Holdings, Inc. (the “Company”) has determined that it is unable, without unreasonable effort or expense, to file its Quarterly Report on Form 10-Q for the period ended June 30, 2024 (the “Quarterly Report”) by the prescribed due date for the reasons described below. As previously disclosed, the Company’s Chief Financial Officer (“CFO”) since 2021, Kevin L. Brackman, resigned from all of his positions in January 2024 and his replacement as CFO, Naiem Hussain, resigned in March 2024. As a result, the Company’s ability to file the Quarterly Report in a timely manner was negatively impacted, resulting in the Company becoming unable to file its Quarterly Report by its prescribed due date without unreasonable effort or expense. The Company is working diligently to complete the Quarterly Report as quickly as possible. 1

2024-05-29filed late (10-Q)staff or resources SEC →

Advent Technologies Holdings, Inc. (the “Company”) has determined that it is unable, without unreasonable effort or expense, to file its Quarterly Report on Form 10-Q for the period ended March 31, 2024 (the “Quarterly Report”) by the prescribed due date for the reasons described below. As previously disclosed, the Company’s Chief Financial Officer (“CFO”) since 2021, Kevin L. Brackman, resigned from all of his positions in January 2024 and his replacement as CFO, Naiem Hussain, resigned in March 2024. As a result, the Company’s ability to file the Quarterly Report in a timely manner was negatively impacted, resulting in the Company becoming unable to file its Quarterly Report by its prescribed due date without unreasonable effort or expense. The Company is working diligently to complete the Quarterly Report as quickly as possible. 1

2024-04-01filed late (10-K)staff or resources SEC →

Advent Technologies Holdings, Inc. (the “Company”) has determined that it is unable, without unreasonable effort or expense, to file its Annual Report on Form 10-K for the period ended December 31, 2023 (the “Annual Report”) by the prescribed due date for the reasons described below. As previously disclosed, the Company’s Chief Financial Officer (“CFO”) since 2021, Kevin L. Brackman, resigned from all of his positions in January 2024 and his replacement as CFO, Naiem Hussain, resigned in March 2024. As a result, the Company’s ability to file the Annual Report in a timely manner was negatively impacted, resulting in the Company becoming unable to file its Annual Report by its prescribed due date without unreasonable effort or expense. The Company is working diligently to complete the Annual Report as quickly as possible

2021-05-17filed late (10-Q)restatement SEC →

Advent Technologies Holdings, Inc. (the “Company”) has determined that it is unable, without unreasonable effort or expense, to file its Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2021 (the “Quarterly Report”) by the prescribed due date for the reasons described below. As previously disclosed, in light of the “Staff Statement on Accounting and Reporting Considerations for Warrants Issued by Special Purpose Acquisition Companies (“SPACs”)” (the “Staff Statement”) issued by the Staff of the Securities and Exchange Commission (“SEC”) on April 12, 2021, the audit committee of the Company’s board of directors, together with management, determined that the Company’s consolidated financial statements and related financial information as of and for the fiscal years ended December 31, 2020 and 2019 contained in the Company’s Annual Report on Form 10-K filed with the SEC on March 26, 2021 (the “Original 10-K”), as well as the unaudited financial statements for the three months ended March 31, 2020 and March 31, 2019, the three and six months ended June 30, 2020 and June 30, 2019 and the three and nine months ended September 30, 2020 and September 30, 2019 contained in the Company’s Quarterly Reports on Form 10-Q, should be restated. The Company is working diligently with its auditors and an independent valuation expert to file restated financial statements as of and for the fiscal years ended December 31, 2020 and 2019 in an amendment to the Original 10-K (the “Restatement”). As a result of the considerable time and dedication of resources required to complete the Restatement, the Company was unable to file its Quarterly Report by its prescribed due date without unreasonable effort or expense. The Company expects to file its Quarterly Report within five calendar days of May 17, 2021

2021-05-07accounts declared unreliable SEC →

2021-02-09auditor changed or resignednot counted — change of control SEC →

About this score

reportingrisk.com scores every active US filer on three things a company tells the SEC about itself: late-filing notices on Form NT, 8-K item 4.02 (past accounts declared unreliable) and 4.01 (auditor changes). 1,012 are flagged today.

Every score is frozen and checked twelve months later. Across 91,452 of them, a company scoring 4 or more ended that year delisted, bankrupt, restated or silent 17.2% of the time, against 4.0% for a clean record. Scores before 2026-09-27 were reconstructed from the filing history as it stood at each date, so the record is a backtest rather than years of live calls.

See the ledger → Every company the score flagged that later failed, what it told the SEC on the way down, and the ones it missed.

Every item above is a filing this company made with the SEC.
Snapshot 2026-11-04 · data from SEC EDGAR (public domain) · not investment advice

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