{"schema_version":"secwatch.filing_event.v1","accession":"0001628280-26-047796","form_type":"8-K","ticker":"EOSE","cik":"0001805077","company_name":"Eos Energy Enterprises, Inc.","filed_at":"2026-07-09T20:24:28+00:00","discovered_at":"2026-07-09T20:26:00.307338+00:00","generated_at":"2026-07-09T20:26:04.954895+00:00","sec_items":["5.02","8.01","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"Eos Energy appoints Haiyan Song to board, names Marie Martin as Chief Legal Officer","bullets":["Haiyan Song appointed to Board of Directors effective July 9, 2026; brings cybersecurity, cloud, and software expertise.","Greg Nixon steps down as preferred stock director; Nate Fick transitions from independent to preferred stock director.","Marie Batz Martin named Chief Legal Officer effective July 13, 2026; succeeds Michael Silberman who remains through Sept 11.","Martin previously Global VP and Chief Compliance Officer at Coherent Corp., with over 20 years legal experience at industrial firms."],"urls":{"canonical":"https://secwatch.observer/filing/0001628280-26-047796","json":"https://secwatch.observer/filing/0001628280-26-047796.json","markdown":"https://secwatch.observer/filing/0001628280-26-047796.md","text":"https://secwatch.observer/filing/0001628280-26-047796.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1805077/000162828026047796/0001628280-26-047796-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1805077/000162828026047796/eose-20260708.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-07-09T20:26:04.954895+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":"a01c6f9139","claim":"Nathaniel Fick resigned as Class III director at Eos Energy Enterprises, Inc..","evidence_excerpt":"On July 8, 2026, Nathaniel Fick resigned from his role as a Class III director of the Board, effective July 8, 2026, to accept an appointment as preferred stock director of the Board.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1805077/000162828026047796/0001628280-26-047796-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"label":"Role","value":"Class III director"}],"fact_type":"executive_change"},{"claim_id":"a7c1107a82","claim":"Haiyan Song was appointed as Class III director at Eos Energy Enterprises, Inc..","evidence_excerpt":"On July 9, 2026, the Board appointed Haiyan Song, age 60, to the Board.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1805077/000162828026047796/0001628280-26-047796-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Class III director"}],"fact_type":"executive_change"},{"claim_id":"b09cf58aec","claim":"Nathaniel Fick was elected as preferred stock director at Eos Energy Enterprises, Inc..","evidence_excerpt":"Nathaniel Fick will succeed Mr. Nixon as a preferred stock director of the Board, effective July 8, 2026.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1805077/000162828026047796/0001628280-26-047796-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"elected"},{"label":"Role","value":"preferred stock director"}],"fact_type":"executive_change"},{"claim_id":"b6de235535","claim":"Greg Nixon resigned as preferred stock director at Eos Energy Enterprises, Inc..","evidence_excerpt":"On July 8, 2026, Greg Nixon resigned from his role as a preferred stock director of the Board of Directors (the “Board”) of Eos Energy Enterprises, Inc. (the “Company”), effective July 8, 2026, to devote more time to other business ventures.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1805077/000162828026047796/0001628280-26-047796-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"label":"Role","value":"preferred stock director"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}