secwatch.observer — SEC 8-K summary ====================================== Issuer: ATOSSA THERAPEUTICS, INC. (ATOS) CIK: 0001488039 Form: 8-K Filed at: 2026-09-18T21:00:21+00:00 Accession: 0001193125-26-395694 Event type: other Sentiment: neutral Materiality: 0.20 Item codes: 7.01, 9.01 LLM model: deepseek-v4-flash:cloud@v2 Atossa updates corporate presentation on (Z)-Endoxifen, but no specifics disclosed -------------------------------------------------------------------------------- - Filed updated corporate presentation on 8-K Sept 18, 2026; no financial or clinical data shown. - Presentation cover cites (Z)-Endoxifen as potential best-in-class oral SERM/SERD for estrogen-driven diseases. - Available exhibit excerpt contains only the title slide; operational milestones or guidance not provided. Source: EDGAR index: https://www.sec.gov/Archives/edgar/data/1488039/000119312526395694/0001193125-26-395694-index.htm Primary doc: https://www.sec.gov/Archives/edgar/data/1488039/000119312526395694/atos-20260918.htm HTML page: https://secwatch.observer/filing/0001193125-26-395694 License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer