{"schema_version":"secwatch.filing_event.v1","accession":"0001680062-26-000020","form_type":"8-K","ticker":"ACMR","cik":"0001680062","company_name":"ACM Research, Inc.","filed_at":"2026-02-06T23:59:59+00:00","discovered_at":"2026-05-14T18:02:35.871861+00:00","generated_at":"2026-05-16T04:06:15.643620+00:00","sec_items":["8.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.65,"calibrated_materiality_score":0.65,"confidence":"high","headline":"ACM Research sells 4.8M shares of subsidiary ACM Shanghai at RMB 160/share, lowering stake from 74.84% to 73.72%","bullets":["Complete sale of 4,801,648 shares of ACM Shanghai (688082) at RMB 160.00 (~$23.05) per share via inquiry-based transfer on SSE.","Aggregate ownership in ACM Shanghai declines from 74.84% to 73.72%; no change in control.","Transfer price determined via inquiry with 38 institutional investors; 30 transferees include fund managers and QFIIs.","Prior reductions by HUI WANG and Jian Wang in Nov 2025; combined concert-party stake now 73.72%.","All transferred shares subject to 6-month lock-up period."],"urls":{"canonical":"https://secwatch.observer/filing/0001680062-26-000020","json":"https://secwatch.observer/filing/0001680062-26-000020.json","markdown":"https://secwatch.observer/filing/0001680062-26-000020.md","text":"https://secwatch.observer/filing/0001680062-26-000020.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1680062/000168006226000020/0001680062-26-000020-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1680062/000168006226000020/acmr-20260206.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-16T04:06:15.643620+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":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}