{"schema_version":"secwatch.filing_event.v1","accession":"0001628280-26-010050","form_type":"8-K","ticker":"WAL","cik":"0001212545","company_name":"WESTERN ALLIANCE BANCORPORATION","filed_at":"2026-02-20T23:59:59+00:00","discovered_at":"2026-05-14T18:02:34.655943+00:00","generated_at":"2026-05-16T01:24:43.795644+00:00","sec_items":["8.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.25,"calibrated_materiality_score":0.25,"confidence":"high","headline":"Western Alliance to host Investor Day on May 12, 2026 in New York City","bullets":["Event on Tuesday, May 12, 2026 at 8:30 a.m. ET in NYC; leadership to discuss strategy and outlook.","Live webcast and replay at investors.westernalliancebancorporation.com under Events & Presentations.","In-person attendance by invitation only; dial-in details provided closer to date."],"urls":{"canonical":"https://secwatch.observer/filing/0001628280-26-010050","json":"https://secwatch.observer/filing/0001628280-26-010050.json","markdown":"https://secwatch.observer/filing/0001628280-26-010050.md","text":"https://secwatch.observer/filing/0001628280-26-010050.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1212545/000162828026010050/0001628280-26-010050-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1212545/000162828026010050/wal-20260220.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-16T01:24:43.795644+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"}