{"schema_version":"secwatch.filing_event.v1","accession":"0001493152-23-015385","form_type":"8-K","ticker":"GTBP","cik":"0000109657","company_name":"GT Biopharma, Inc.","filed_at":"2023-05-04T23:59:59+00:00","discovered_at":"2026-05-14T18:03:37.931943+00:00","generated_at":"2026-06-15T19:50:15.608224+00:00","sec_items":["5.02","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.45,"calibrated_materiality_score":0.45,"confidence":"high","headline":"GT Biopharma appoints Charles Casamento to board; Alan Urban resigns","bullets":["Charles J. Casamento appointed to board effective May 1, 2023, to fill vacant seat.","Casamento to serve on Audit, Compensation, and Nominating & Governance committees.","Alan Urban resigned from board on May 1, 2023, to pursue new career opportunities.","Casamento has >35 years biopharma experience, formerly CEO of Questcor Pharmaceuticals and Osteologix.","Casamento currently serves on boards of four NASDAQ-listed biotechs: Eton, First Wave, PaxMedica, Relmada."],"urls":{"canonical":"https://secwatch.observer/filing/0001493152-23-015385","json":"https://secwatch.observer/filing/0001493152-23-015385.json","markdown":"https://secwatch.observer/filing/0001493152-23-015385.md","text":"https://secwatch.observer/filing/0001493152-23-015385.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/109657/000149315223015385/0001493152-23-015385-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/109657/000149315223015385/form8-k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-15T19:50:15.608224+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":"bfef63bfa0","claim":"Charles J. Casamento was appointed as Director at GT Biopharma, Inc..","evidence_excerpt":"the Registrant’s Board appointed Charles J. Casamento to fill a vacant seat on the Board","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/109657/000149315223015385/0001493152-23-015385-index.htm","confidence":1.0,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Director"}],"fact_type":"executive_change"},{"claim_id":"c04d9e1697","claim":"Alan Urban resigned as Director at GT Biopharma, Inc..","evidence_excerpt":"On May 1, 2023 Alan Urban resigned as a member of the Registrant’s Board of Directors (the “Board”).","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/109657/000149315223015385/0001493152-23-015385-index.htm","confidence":1.0,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"label":"Role","value":"Director"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}