secwatch.observer — SEC 8-K summary ====================================== Issuer: GT Biopharma, Inc. (GTBP) CIK: 0000109657 Form: 8-K Filed at: 2025-09-26T23:59:59+00:00 Accession: 0001493152-25-015725 Event type: other_material Sentiment: positive Materiality: 0.55 Item codes: 3.03, 9.01 LLM model: deepseek-v4-flash:cloud@v2 GT Biopharma Series L Preferred holders waive redemption rights – all holders now in agreement -------------------------------------------------------------------------------- - All Series L 10% Convertible Preferred Stock holders have waived redemption rights under Section 10 of the Certificate of Designations. - Additional holder provided waiver on September 25, 2025, completing the agreement across all holders. - Waiver eliminates potential redemption trigger that could require cash outlay, improving liquidity. - No financial impact disclosed; modification alters preferred stockholder rights. Source: EDGAR index: https://www.sec.gov/Archives/edgar/data/109657/000149315225015725/0001493152-25-015725-index.htm Primary doc: https://www.sec.gov/Archives/edgar/data/109657/000149315225015725/form8-k.htm HTML page: https://secwatch.observer/filing/0001493152-25-015725 License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer