{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-21-239806","form_type":"8-K","ticker":"LONA","cik":"0001620463","company_name":"LeonaBio, Inc.","filed_at":"2021-08-09T23:59:59+00:00","discovered_at":"2026-05-14T18:04:18.900287+00:00","generated_at":"2026-06-29T18:46:26.823088+00:00","sec_items":["8.01","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"Athira Pharma board chair Tadataka Yamada dies; Kelly Romano named new chair","bullets":["Dr. Tadataka Yamada, Chair of Board since Jan 2020, died unexpectedly on Aug 4, 2021.","Board appointed Kelly A. Romano as new Chair and Barbara Kosacz as Chair of Compensation and Nominating Committees.","Romano brings 30+ years of executive experience, previously president at UTC Building & Industrial Systems.","Yamada was a venture partner at Frazier Healthcare, co-founder of several biotechs, and former exec at Takeda and Gates Foundation."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-21-239806","json":"https://secwatch.observer/filing/0001193125-21-239806.json","markdown":"https://secwatch.observer/filing/0001193125-21-239806.md","text":"https://secwatch.observer/filing/0001193125-21-239806.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1620463/000119312521239806/0001193125-21-239806-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1620463/000119312521239806/d174014d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-29T18:46:26.823088+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":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}