{"schema_version":"secwatch.filing_event.v1","accession":"0001628280-25-032651","form_type":"8-K","ticker":"LNZA","cik":"0001843724","company_name":"LanzaTech Global, Inc.","filed_at":"2025-06-23T23:59:59+00:00","discovered_at":"2026-05-14T18:02:50.101218+00:00","generated_at":"2026-05-19T00:09:16.278366+00:00","sec_items":["5.02","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.25,"calibrated_materiality_score":0.25,"confidence":"high","headline":"Chief Accounting Officer Michael Heraty resigns; CFO Koyanagi adds duties","bullets":["Michael Heraty resigned as Chief Accounting Officer effective June 26, 2025.","Resignation not related to any disagreement on financial reporting or operations.","CFO Sushmita Koyanagi will assume principal accounting officer role in addition to CFO.","No new compensatory arrangement was entered into with Ms. Koyanagi for the additional role."],"urls":{"canonical":"https://secwatch.observer/filing/0001628280-25-032651","json":"https://secwatch.observer/filing/0001628280-25-032651.json","markdown":"https://secwatch.observer/filing/0001628280-25-032651.md","text":"https://secwatch.observer/filing/0001628280-25-032651.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1843724/000162828025032651/0001628280-25-032651-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1843724/000162828025032651/amci-20250616.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-19T00:09:16.278366+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":"e56df105c5","claim":"Michael Heraty resigned as Chief Accounting Officer at LanzaTech Global, Inc..","evidence_excerpt":"On June 16, 2025, Michael Heraty, the Chief Accounting Officer of LanzaTech Global, Inc. (the “Company”), submitted his resignation, effective as of June 26, 2025.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1843724/000162828025032651/0001628280-25-032651-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"label":"Role","value":"Chief Accounting Officer"}],"fact_type":"executive_change"},{"claim_id":"ff80aa0cf0","claim":"Sushmita Koyanagi changed role as Chief Financial Officer and principal accounting officer at LanzaTech Global, Inc..","evidence_excerpt":"Sushmita Koyanagi, the Company’s Chief Financial Officer, is expected to assume the responsibilities of principal accounting officer","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1843724/000162828025032651/0001628280-25-032651-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"assumed responsibilities of principal accounting officer"},{"label":"Role","value":"Chief Financial Officer and principal accounting officer"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}