{"schema_version":"secwatch.filing_event.v1","accession":"0001104659-26-029952","form_type":"8-K","ticker":"ENZN","cik":"0000727510","company_name":"Viskase Holdings, Inc.","filed_at":"2026-03-18T23:59:59+00:00","discovered_at":"2026-05-14T18:02:37.596720+00:00","generated_at":"2026-05-15T09:59:31.577837+00:00","sec_items":["1.01","3.03","9.01"],"event_type":"other","sentiment":"neutral","materiality_score":0.2,"calibrated_materiality_score":0.2,"confidence":"high","headline":"Enzon extends shareholder rights plan expiration to March 24, 2026 via Tenth Amendment","bullets":["Tenth Amendment to Section 382 Rights Agreement extends Final Expiration Date from noon March 18 to noon March 24, 2026.","Rights Agreement otherwise remains unmodified; this is the tenth successive short-term extension since June 2024.","Company states extension is in best interests of Enzon and its stockholders."],"urls":{"canonical":"https://secwatch.observer/filing/0001104659-26-029952","json":"https://secwatch.observer/filing/0001104659-26-029952.json","markdown":"https://secwatch.observer/filing/0001104659-26-029952.md","text":"https://secwatch.observer/filing/0001104659-26-029952.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/727510/000110465926029952/0001104659-26-029952-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/727510/000110465926029952/tm267491d4_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-15T09:59:31.577837+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":"fd641477646e6e6e1ab947738d32ed8e1852093a","claim":"Viskase Holdings, Inc. amended Tenth Amendment to Section 382 Rights Agreement with Continental Stock Transfer & Trust Company (effective 2026-03-18).","evidence_excerpt":"On March 18, 2026, Enzon Pharmaceuticals, Inc. (the “ Company ”) entered into the Tenth Amendment to the Section 382 Rights Agreement (the “ Tenth Amendment ”)","evidence_source":"SEC 8-K Item 1.01/1.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/727510/000110465926029952/0001104659-26-029952-index.htm","confidence":0.9,"family_label":"Material Agreements","details":[{"label":"Action","value":"amendment"},{"label":"Counterparty","value":"Continental Stock Transfer & Trust Company"},{"label":"Effective","value":"2026-03-18"}]}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}