{"schema_version":"secwatch.filing_event.v1","accession":"0000950170-25-085374","form_type":"8-K","ticker":"UPB","cik":"0002022626","company_name":"Upstream Bio, Inc.","filed_at":"2025-06-12T23:59:59+00:00","discovered_at":"2026-05-14T18:02:50.697598+00:00","generated_at":"2026-05-19T11:36:57.726915+00:00","sec_items":["5.07"],"event_type":"other","sentiment":"neutral","materiality_score":0.3,"calibrated_materiality_score":0.15,"confidence":"high","headline":"Upstream Bio shareholders elect two Class I directors, ratify PwC as auditor","bullets":["Erez Chimovits received 42,089,191 votes for, 241,430 withheld; Marcella Kuhlman Ruddy received 41,993,308 for, 337,313 withheld.","Ratification of PwC as independent auditor for FY2025 approved with 43,600,758 for, 996 against, 25,541 abstain.","Meeting held June 10, 2025; 53,688,703 shares outstanding and entitled to vote."],"urls":{"canonical":"https://secwatch.observer/filing/0000950170-25-085374","json":"https://secwatch.observer/filing/0000950170-25-085374.json","markdown":"https://secwatch.observer/filing/0000950170-25-085374.md","text":"https://secwatch.observer/filing/0000950170-25-085374.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/2022626/000095017025085374/0000950170-25-085374-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/2022626/000095017025085374/upb-20250610.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-19T11:36:57.726915+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"}