{"schema_version":"secwatch.filing_event.v1","accession":"0001805077-24-000002","form_type":"8-K","ticker":"EOSE","cik":"0001805077","company_name":"Eos Energy Enterprises, Inc.","filed_at":"2024-01-09T23:59:59+00:00","discovered_at":"2026-05-14T18:03:25.597870+00:00","generated_at":"2026-06-07T01:38:40.219475+00:00","sec_items":["1.01","7.01","9.01"],"event_type":"other_material","sentiment":"positive","materiality_score":0.75,"calibrated_materiality_score":0.75,"confidence":"high","headline":"Eos Energy names TETRA preferred electrolyte supplier; TETRA to supply min 75% of demand","bullets":["TETRA to supply 100% of Eos's zinc bromide (PureFlow) and 75% of proprietary electrolyte solution needs.","Four-year agreement (through Dec 31, 2027) includes right of first refusal and non-exclusive license to electrolyte formula.","No minimum purchase volumes required; pricing includes favorable cost-saving allocation mechanisms.","Partnership supports Eos's U.S. supply chain and cost reduction goals for Z3 long-duration energy storage cube.","Agreement expands existing relationship dating to 2021; TETRA investing in expanded bromine production."],"urls":{"canonical":"https://secwatch.observer/filing/0001805077-24-000002","json":"https://secwatch.observer/filing/0001805077-24-000002.json","markdown":"https://secwatch.observer/filing/0001805077-24-000002.md","text":"https://secwatch.observer/filing/0001805077-24-000002.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1805077/000180507724000002/0001805077-24-000002-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1805077/000180507724000002/eose-20240108.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-07T01:38:40.219475+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":"041b8fcae01989b5b8f8dd64c90d0d343ebd4254","claim":"Eos Energy Enterprises, Inc. entered into Supply Agreement with TETRA Technologies, Inc. (effective 2024-01-08).","evidence_excerpt":"On January 8, 2024, HI-POWER, LLC (“Hi-Power”), a wholly-owned subsidiary of Eos Energy Enterprises, Inc. (“Eos”), entered into an Amended and Restated Manufacturing Purchase and Supply Agreement (the “Supply Agreement”) with TETRA Technologies, Inc. (“TETRA”), a Delaware corporation, to govern the provision of TETRA PureFlow® zinc bromide and the manufacturing and provision of Eos’s proprietary electrolyte solution (collectively, the “Products”) by TETRA to Eos.","evidence_source":"SEC 8-K Item 1.01/1.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1805077/000180507724000002/0001805077-24-000002-index.htm","confidence":0.9,"family_label":"Material Agreements","details":[{"label":"Action","value":"entry"},{"label":"Agreement","value":"supply"},{"label":"Counterparty","value":"TETRA Technologies, Inc."},{"label":"Effective","value":"2024-01-08"}],"fact_type":"material_agreement"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}