{"schema_version":"secwatch.filing_event.v1","accession":"0001140361-25-009270","form_type":"8-K","ticker":"ACMR","cik":"0001680062","company_name":"ACM Research, Inc.","filed_at":"2025-03-18T23:59:59+00:00","discovered_at":"2026-05-14T18:03:04.417502+00:00","generated_at":"2026-05-24T13:55:41.727260+00:00","sec_items":["5.02","8.01","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.3,"calibrated_materiality_score":0.3,"confidence":"high","headline":"ACM Research appoints Charlie Pappis to Board of Directors, effective March 15, 2025","bullets":["Charlie Pappis, a semiconductor industry veteran with 40+ years of experience, appointed to board.","Board size increases to five members with the addition of Pappis.","Pappis received an option to purchase 10,000 shares at $29.18, vesting before 2025 annual meeting.","He previously held executive leadership roles at a major U.S. semiconductor equipment company.","Appointment effective March 15, 2025; press release issued March 18, 2025."],"urls":{"canonical":"https://secwatch.observer/filing/0001140361-25-009270","json":"https://secwatch.observer/filing/0001140361-25-009270.json","markdown":"https://secwatch.observer/filing/0001140361-25-009270.md","text":"https://secwatch.observer/filing/0001140361-25-009270.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1680062/000114036125009270/0001140361-25-009270-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1680062/000114036125009270/ef20045712_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-24T13:55:41.727260+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":"1ac63c8664","claim":"Charles Pappis was appointed as member of the Board and its Audit Committee at ACM Research, Inc..","evidence_excerpt":"The Board of Directors (the “Board”) of ACM Research, Inc. (the “Company”) has appointed Charles Pappis to serve as a member of the Board and its Audit Committee, effective March 15, 2025.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1680062/000114036125009270/0001140361-25-009270-index.htm","confidence":1.0,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"member of the Board and its Audit Committee"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}