{"schema_version":"secwatch.filing_event.v1","accession":"0001140361-23-045244","form_type":"8-K","ticker":"ACMR","cik":"0001680062","company_name":"ACM Research, Inc.","filed_at":"2023-09-26T23:59:59+00:00","discovered_at":"2026-05-14T18:03:34.837199+00:00","generated_at":"2026-06-10T08:43:16.289621+00:00","sec_items":["4.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"ACM Research appoints Ernst & Young as new independent auditor for FY 2023","bullets":["Audit Committee selected E&Y as independent auditor for fiscal year ending Dec 31, 2023, effective Sept 20, 2023.","Prior auditor Armanino resigned effective Sept 20 due to its decision to exit public-company audit practice.","No disagreements or reportable events with Armanino during FY2022, FY2021, or interim 2023 period.","Company did not consult E&Y on any accounting, auditing, or financial reporting issue before engagement."],"urls":{"canonical":"https://secwatch.observer/filing/0001140361-23-045244","json":"https://secwatch.observer/filing/0001140361-23-045244.json","markdown":"https://secwatch.observer/filing/0001140361-23-045244.md","text":"https://secwatch.observer/filing/0001140361-23-045244.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1680062/000114036123045244/0001140361-23-045244-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1680062/000114036123045244/ef20011135_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-10T08:43:16.289621+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":"1087e07be0d0ab3ca27edb1dfd353521cab8b202","claim":"ACM Research, Inc. engaged Ernst & Young Hua Ming LLP as its auditor.","evidence_excerpt":"the Audit Committee approved the engagement of Ernst & Young Hua Ming LLP (\"E&Y\") as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2023. The engagement of E&Y became effective on September 20, 2023.","evidence_source":"SEC 8-K Item 4.01/4.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036123045244/0001140361-23-045244-index.htm","confidence":0.9,"family_label":"Auditor Changes","details":[{"label":"Action","value":"engagement"},{"label":"Auditor","value":"Ernst & Young Hua Ming LLP"}],"fact_type":"auditor_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}