{"schema_version":"secwatch.filing_event.v1","accession":"0001493152-25-014684","form_type":"8-K","ticker":"GTBP","cik":"0000109657","company_name":"GT Biopharma, Inc.","filed_at":"2025-09-23T23:59:59+00:00","discovered_at":"2026-05-14T18:02:43.332526+00:00","generated_at":"2026-05-17T05:51:30.277149+00:00","sec_items":["3.03","9.01"],"event_type":"other","sentiment":"positive","materiality_score":0.55,"calibrated_materiality_score":0.55,"confidence":"high","headline":"GT Biopharma series L preferred holders waive redemption rights permanently","bullets":["Holders of Series L 10% Convertible Preferred Stock waived redemption rights under Section 10 of the Certificate of Designations.","Waivers were provided on September 17, 18, and 23, 2025, and are permanent.","Waiver does not affect other rights of the preferred stockholders under the Certificate of Designations.","The company requested the waiver; certain holders countersigned the form of waiver."],"urls":{"canonical":"https://secwatch.observer/filing/0001493152-25-014684","json":"https://secwatch.observer/filing/0001493152-25-014684.json","markdown":"https://secwatch.observer/filing/0001493152-25-014684.md","text":"https://secwatch.observer/filing/0001493152-25-014684.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/109657/000149315225014684/0001493152-25-014684-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/109657/000149315225014684/form8-k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-17T05:51:30.277149+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":"c1756e79ee287e7ca310370147c6d72398ca7d36","claim":"GT Biopharma, Inc. issued preferred stock to certain of the holders of GT Biopharma, Inc.'s Series L 10% Convertible Preferred Stock.","evidence_excerpt":"each of September 17, 2025, September 18, 2025 and September 23, 2025, certain of the holders of GT Biopharma, Inc.’s Series L 10% Convertible Preferred Stock (the “Series L Preferred Stock”) provided a waiver (the “Waiver”) to the Certificate of Designation of Preferences, Rights and Limitations of Series L 10% Convertible Preferred Stock (the “Certificate of Designations”)","evidence_source":"SEC 8-K Item 3.02/3.03","evidence_url":"https://www.sec.gov/Archives/edgar/data/109657/000149315225014684/0001493152-25-014684-index.htm","confidence":0.9,"family_label":"Equity Issuances","details":[{"label":"Security","value":"preferred stock"},{"label":"Purchaser","value":"certain of the holders of GT Biopharma, Inc.'s Series L 10% Convertible Preferred Stock"}],"fact_type":"equity_issuance"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}