{"schema_version":"secwatch.filing_event.v1","accession":"0000950170-25-114093","form_type":"8-K","ticker":"LONA","cik":"0001620463","company_name":"LeonaBio, Inc.","filed_at":"2025-09-11T23:59:59+00:00","discovered_at":"2026-05-14T18:02:44.497329+00:00","generated_at":"2026-05-17T06:52:58.891825+00:00","sec_items":["3.03","5.03","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.6,"calibrated_materiality_score":0.6,"confidence":"high","headline":"Athira Pharma to effect 10-for-1 reverse stock split on Sep 17 to meet Nasdaq minimum bid price","bullets":["Effective Sept 17 at 5pm ET; shares start trading split-adjusted on Sep 18 under ticker ATHA.","Every 10 pre-split shares convert to 1; authorized common shares reduced from 900M to 90M.","Purpose: increase share price to comply with Nasdaq's $1.00 minimum bid requirement.","Fractional shares paid in cash; CUSIP changes to 04746L203.","No action needed by book-entry or street-name holders; Computershare is exchange agent."],"urls":{"canonical":"https://secwatch.observer/filing/0000950170-25-114093","json":"https://secwatch.observer/filing/0000950170-25-114093.json","markdown":"https://secwatch.observer/filing/0000950170-25-114093.md","text":"https://secwatch.observer/filing/0000950170-25-114093.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1620463/000095017025114093/0000950170-25-114093-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1620463/000095017025114093/atha-20250910.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-17T06:52:58.891825+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":"9b262e9deccc65e8e31697ba040ef658e086e376","claim":"LeonaBio, Inc.: Amended certificate of incorporation to effect a 10-for-1 reverse stock split (effective 2025-09-17).","evidence_excerpt":"On September 10, 2025, the Company filed a certificate of amendment to the Company’s Amended and Restated Certificate of Incorporation (the “Certificate of Amendment”), with the Secretary of State of the State of Delaware to effect a 10-for-1 reverse stock split of the shares of the Company’s common stock, par value $0.0001 per share, effective as of 5:00 p.m., Eastern Time, on September 17, 2025 (the “Reverse Stock Split”).","evidence_source":"SEC 8-K Item 5.03/5.05/5.06","evidence_url":"https://www.sec.gov/Archives/edgar/data/1620463/000095017025114093/0000950170-25-114093-index.htm","confidence":0.9,"family_label":"Governance Changes","details":[{"label":"Change","value":"charter amendment"},{"label":"Effective","value":"2025-09-17"}],"fact_type":"governance_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}