{"schema_version":"secwatch.filing_event.v1","accession":"0001829126-26-000309","form_type":"8-K","ticker":"ADNH","cik":"0001744494","company_name":"ADVENT TECHNOLOGIES HOLDINGS, INC.","filed_at":"2026-01-15T23:59:59+00:00","discovered_at":"2026-05-14T18:02:36.058544+00:00","generated_at":"2026-05-16T10:10:41.835897+00:00","sec_items":["1.01","3.02","5.02","9.01"],"event_type":"debt","sentiment":"neutral","materiality_score":0.55,"calibrated_materiality_score":0.55,"confidence":"high","headline":"Advent Technologies secures CHF 500,000 secured note; appoints lender Chris Antonopoulos to board","bullets":["Secured promissory note of CHF 500,000 at 8.5% interest, due Jan 7, 2027; secured by all assets and IP.","Lender may convert principal and interest into common stock at avg of three lowest trade prices in prior 30 days.","Automatic conversion into common stock upon qualified financing of at least $25M gross proceeds.","Chris Antonopoulos appointed as Class II director until 2028 annual meeting; note includes most-favored-nation clause.","Proceeds to be used for working capital and to identify a financial advisor to secure long-term investment partner."],"urls":{"canonical":"https://secwatch.observer/filing/0001829126-26-000309","json":"https://secwatch.observer/filing/0001829126-26-000309.json","markdown":"https://secwatch.observer/filing/0001829126-26-000309.md","text":"https://secwatch.observer/filing/0001829126-26-000309.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1744494/000182912626000309/0001829126-26-000309-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1744494/000182912626000309/adventtech_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-16T10:10:41.835897+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[{"claim_id":"ad4b592d81a30f804cdf0d60eb3b98fdc1b50f0a","claim":"ADVENT TECHNOLOGIES HOLDINGS, INC. entered into Secured Promissory Note with Chris Antonopoulos valued at CHF 500,000 (effective 2026-01-08).","evidence_excerpt":"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”)","evidence_source":"SEC 8-K Item 1.01/1.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1744494/000182912626000309/0001829126-26-000309-index.htm","confidence":0.9,"family_label":"Material Agreements","details":[{"label":"Action","value":"entry"},{"label":"Agreement","value":"credit facility"},{"label":"Counterparty","value":"Chris Antonopoulos"},{"label":"Value","value":"CHF 500,000"},{"label":"Effective","value":"2026-01-08"}],"fact_type":"material_agreement"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}