{"schema_version":"secwatch.filing_event.v1","accession":"0001628280-25-058583","form_type":"8-K","ticker":"EOSE","cik":"0001805077","company_name":"Eos Energy Enterprises, Inc.","filed_at":"2025-12-22T23:59:59+00:00","discovered_at":"2026-05-14T18:02:40.517807+00:00","generated_at":"2026-05-16T12:26:10.847505+00:00","sec_items":["5.02","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.35,"calibrated_materiality_score":0.35,"confidence":"high","headline":"Eos Energy board chair Stidolph resigns; Joseph Nigro appointed successor","bullets":["Russell Stidolph resigns from Board effective Dec 31, 2025, to focus on AltEnergy Acquisition Corp.","Joseph Nigro to become non-executive Chair effective Jan 1, 2026.","Nigro previously served as CFO of Exelon and CEO of Constellation; joined Eos Board in early 2025.","Stidolph had been non-executive Chair since April 2018 and invested through AltEnergy for 11 years."],"urls":{"canonical":"https://secwatch.observer/filing/0001628280-25-058583","json":"https://secwatch.observer/filing/0001628280-25-058583.json","markdown":"https://secwatch.observer/filing/0001628280-25-058583.md","text":"https://secwatch.observer/filing/0001628280-25-058583.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1805077/000162828025058583/0001628280-25-058583-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1805077/000162828025058583/eose-20251222.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-16T12:26:10.847505+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"}