{"schema_version":"secwatch.filing_event.v1","accession":"0001628280-26-025564","form_type":"8-K","ticker":"LNZA","cik":"0001843724","company_name":"LanzaTech Global, Inc.","filed_at":"2026-04-16T23:59:59+00:00","discovered_at":"2026-05-14T18:02:33.105990+00:00","generated_at":"2026-05-15T05:51:16.280981+00:00","sec_items":["4.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.35,"calibrated_materiality_score":0.35,"confidence":"high","headline":"LanzaTech dismisses Deloitte, appoints BDO as new auditor; prior reports included going-concern doubt","bullets":["Deloitte & Touche dismissed as auditor effective April 10, 2026; BDO USA appointed for FY2026.","No disagreements with Deloitte on accounting principles or audit scope; no restatements.","Deloitte's reports for 2024 and 2025 each included an explanatory paragraph about substantial doubt as a going concern.","Material weaknesses in internal controls previously disclosed related to complex transactions, estimates, and revenue recognition.","Company requested Deloitte to provide a letter to SEC; to be filed as exhibit within 2-10 business days."],"urls":{"canonical":"https://secwatch.observer/filing/0001628280-26-025564","json":"https://secwatch.observer/filing/0001628280-26-025564.json","markdown":"https://secwatch.observer/filing/0001628280-26-025564.md","text":"https://secwatch.observer/filing/0001628280-26-025564.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1843724/000162828026025564/0001628280-26-025564-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1843724/000162828026025564/amci-20260410.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-15T05:51:16.280981+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":"0246b01ae583b96e7b2e2e0dc161b676ecea8d55","claim":"LanzaTech Global, Inc. dismissed Deloitte & Touche LLP as its auditor.","evidence_excerpt":"upon the recommendation and approval of the Audit Committee of the Board of Directors (the “Audit Committee”), the Board of Directors of LanzaTech Global, Inc. (the “Company”) ratified and approved the dismissal of Deloitte & Touche LLP (“Deloitte”) as the Company’s independent registered public accounting firm, effective April 10, 2026.","evidence_source":"SEC 8-K Item 4.01/4.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1843724/000162828026025564/0001628280-26-025564-index.htm","confidence":0.9,"family_label":"Auditor Changes","details":[{"label":"Action","value":"dismissal"},{"label":"Auditor","value":"Deloitte & Touche LLP"},{"label":"Successor","value":"BDO USA, P.C."}],"fact_type":"auditor_change"},{"claim_id":"6ecdbb5dc5d2504970fe704f2b1f370c44973826","claim":"LanzaTech Global, Inc. engaged BDO USA, P.C. as its auditor.","evidence_excerpt":"upon the recommendation and approval of the Audit Committee, the Board of Directors of the Company ratified and approved the engagement of BDO USA, P.C. (“BDO”) as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2026, effective April 10, 2026.","evidence_source":"SEC 8-K Item 4.01/4.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1843724/000162828026025564/0001628280-26-025564-index.htm","confidence":0.9,"family_label":"Auditor Changes","details":[{"label":"Action","value":"engagement"},{"label":"Auditor","value":"BDO USA, P.C."}],"fact_type":"auditor_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}